An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
... The fitness of individual species depends on their ability to persist and establish at low densities, just as the diversity of ecological communities depends on the establishment and persistence of low‐density, “invader” species. Theory predicts that abiotic conditions and the competitive make‐up of resident communities jointly shape invader fitness, limiting the phenotypic identity of successful ...
... Agricultural activities, including stock-farming, planting industry, and fish aquaculture, can affect the physicochemical and biological characters of freshwater lakes. However, the effects of pollution producing by agricultural activities on microbial ecosystem of lakes remain unclear. Hence, in this work, we selected Honghu Lake as a typical lake that is influenced by agriculture activities. We ...
... Intentional use of arbuscular mycorrhizal fungi (AMF) in cropping systems has been marginal, owing to the high cost and limited biodiversity of commercial inocula, together with the timeliness of colonization to achieve benefits. Additionally, mycorrhiza are considered incompatible with high input cropping systems. Combining results from 4 different experiments resulted in a strategy for the earli ...
Kalmia angustifolia; Picea mariana; dry matter content; forest communities; forests; functional diversity; herbs; leaf area; leaves; national parks; seed weight; shrubs; species diversity; trees; wildfires; Newfoundland and Labrador
Abstract:
... QUESTION: In Eastern Canada, wildfires turn Picea mariana forests into Kalmia angustifolia dominated heath or P. mariana forest depending on burn severity. These alternate end‐points of succession provide an opportunity to test assumptions concerning alternate successional trajectories dominated by distinct plant functional groups. Disturbance effects on functional diversity (FD) have been studied ...
amphibians; climate change; dry environmental conditions; functional diversity; geographical distribution; life history; models; mountains; rain; species richness; temperature; North America; South America
Abstract:
... AIM: We examined the geographical distribution of functional diversity for American amphibians and tested the relationship between functional diversity and environment. We also explored how the functional evenness of life‐history traits varies across biogeographical regions. LOCATION: Continental Americas. METHODS: We performed a trait classification based on an Eltonian approach and calculated fu ...
aquatic habitat; case studies; ecosystems; environmental indicators; fish; fish communities; floodplains; functional diversity; invasive species; nutrient content; rivers; water quality; Illinois River; Mississippi River
Abstract:
... Large floodplain-river ecosystems are often highly modified to provide services that society desires, yet these modifications can limit an ecosystem’s ability to adapt to changing conditions. The adaptive capacity of an ecosystem, its general resilience, is a conceptual framework for considering how a system will respond to such changes. We sought to apply aspects of three general resilience princ ...
... Auxin is an important plant hormone that is essential for growth and development due to its effects on organogenesis, morphogenesis, tropisms, and apical dominance. The functional diversity of auxin highlights the importance of its biosynthesis, transport, and associated responses. In this study, we show that a NAC transcription factor, ANAC092 (also named AtNAC2 and ORESARA1), known to positively ...
anthropogenic activities; autumn; coal; functional diversity; habitat connectivity; landscapes; mining; models; phylogeny; species diversity; subsidence; water birds; wetlands; China
Abstract:
... AIM: Although assembly processes have been studied in a wide range of taxa, determining assembly rules remains controversial, particularly in assemblages consisted of species with strong dispersal capacities. Moreover, few studies focused on communities in recently human‐created habitats. We tested two prevailing but opposing hypotheses, environmental filtering and limiting similarity, in waterbir ...
aquatic insects; body size; field experimentation; functional diversity; habitats; insect communities; insect flight; locomotion; samplers; streams
Abstract:
... Initial colonists of empty habitats tend to differ from those arriving later in terms of species identity and traits. We evaluated the dynamics of the functional attributes in aquatic insect communities during a colonization experiment under natural conditions. We tested whether the late stages of colonization show higher functional richness, diversity and specialization than early successional st ...
carbon nitrogen ratio; detritivores; ecosystems; functional diversity; natural regeneration; soil; species richness; trees; tropical forests; vegetation structure; Brazil
Abstract:
... Restoration projects may have broad and complex ecological goals that require distinct and integrative measures for evaluating restoration development and success. However, most studies usually evaluate structural and species composition parameters, with less emphasis on ecological processes and functioning. The main objective of this study is to use an integrated approach that considers structura ...
... The microbial community mediated biogeochemical cycles play important role in global C-cycle and display a sensitive response to environmental changes. Limited information is available on microbial composition and functional diversity controlling biogeochemical cycles in the riverine environment. The Ganga River water and sediment samples were studied for environmental gene tags with reference to ...
Viktória B-Béres; Béla Tóthmérész; István Bácsi; Gábor Borics; András Abonyi; Kálmán Tapolczai; Frederic Rimet; Ágnes Bouchez; Gábor Várbíró; Péter Török
... Climate change is predicted to increase drought occurrence and severity in small continental watercourses. Here, we studied the structure and the functional diversity of benthic diatom assemblages in lowland intermittent and permanent watercourses of the Carpathian basin. We assumed that the community structure of intermittent and permanent watercourses would be markedly different, and the functio ...
... Intrinsically disordered proteins (IDPs) or regions (IDRs) perform diverse cellular functions, but are also prone to forming promiscuous and potentially deleterious interactions. We investigate the extent to which the properties of, and content in, IDRs have adapted to enable functional diversity while limiting interference from promiscuous interactions in the crowded cellular environment. Informa ...
algorithms; anthropogenic activities; environmental assessment; environmental factors; environmental impact; fish; fish communities; functional diversity; land use; species diversity; streams; watersheds
Abstract:
... Despite the importance of assessing beta diversity to understand the effects of human modifications on biological communities, there are almost no studies that properly addressed how beta diversity varies along anthropogenic gradients. We developed an algorithm to calculate beta diversity among a set of sites included in a moving window along any given environmental gradient. This allowed us to as ...
... Studies on mammalian community ecology and biogeography are increasingly using functional diversity to advance our understanding of how diversity is maintained and how it varies across space and over time. Functional diversity quantifies the range and prevalence of species traits in an assemblage and provides a means of linking patterns of diversity to the ecological processes that generate them. ...
... Biofertilizer happens to be a promising alternative of chemical fertilizer in the establishment of sustainable agricultural practices. Following this observation, several nitrogen-fixing bacteria were isolated from the soil in which an isolate (AKS7) was selected for further studies as AKS7 showed considerable competence in growth on nitrogen-free growth medium. Acetylene reduction assay confirmed ...
aquatic ecosystems; aquatic environment; biochemical pathways; biotransformation; chemical pollutants; freshwater; functional diversity; laboratory experimentation; mass spectrometry; phytoplankton; pollution load; remediation; species richness
Abstract:
... Biotransformation of chemical pollutants is an ecological process requiring multifunctionality (multiple metabolic pathways) and, potentially, high biodiversity. Phytoplankton communities are highly diverse functionally and taxonomically and co-occur with complex mixtures of organic pollutants in aquatic environments. Here, we investigated how phytoplankton species richness (SR) and class richness ...
Chiara Lelli; Hans Henrik Bruun; Alessandro Chiarucci; Davide Donati; Fabrizio Frascaroli; Örjan Fritz; Irina Goldberg; Juri Nascimbene; Anders P. Tøttrup; Carsten Rahbek; Jacob Heilmann-Clausen
... We investigated the consistency between richness and trait-based diversity metrics in capturing the effects of management-related habitat factors on biodiversity. The choice of biodiversity metrics can substantially affect the evaluation of conservation tools. However, the relative sensitivity of different metrics is not well investigated, especially in a multi-taxon framework.European beech fores ...
... KEY MESSAGE : The results of this study, based on a large dataset with mapped tree locations, suggest that the relationship between biodiversity and ecosystem functioning (BEF) is different between the over- and understorey in the investigated forest community. Neither the functional nor the phylogenetic diversity showed a significant advantage in predicting aboveground biomass and biomass product ...
... Experiments have shown that increasing dissolved CO2 concentrations (i.e. Ocean Acidification, OA) in marine ecosystems may act as nutrient for primary producers (e.g. fleshy algae) or a stressor for calcifying species (e.g., coralline algae, corals, molluscs). For the first time, rapid habitat dominance shifts and altered competitive replacement from a reef-forming to a non-reef-forming biogenic ...
... Urban parks are important for biodiversity conservation in urban ecosystems. Many natural and anthropogenic factors are associated with bird diversity in urban parks. However, so far no studies have compared the relative roles of these factors in shaping bird taxonomic, phylogenetic and functional diversity in urban parks in whole China. In this study, we linked anthropogenic variables (NDVI, popu ...
... Effects of bovine urine on microbial functional attributes within the carbon (C) cycle have not previously been investigated. The magnitude of urine effects on microbial populations may be mediated by the ability of a soil to buffer changes to pH and electrical conductivity (EC) in response to urine. We examined changes in the metabolism of C substrates by microbial communities subsequent to treat ...
... The continued decline in farmland biodiversity in Europe despite substantial funding for agri-environment schemes (AES) has prompted calls for more effective biodiversity conservation measures. The current AES regime allows for both holistic measures, such as organic farming, that broadly target the agricultural environment and biodiversity-specific measures, such as flowering fields, but little i ...
... Although many studies have described the influence of bivalve aquaculture on the benthic environment, effects on benthic functional diversity are poorly known, as are links with ecosystem processes. We investigated the response of a benthic ecosystem in terms of taxonomic and functional diversity (infauna >500 μm), biogeochemical indicators (organic matter content, redox potential, sulfides level, ...
... In insects, olfaction plays a critical role in locating hosts, recognizing mates, and selecting oviposition sites. The Asian long-horned beetle (Anoplophora glabripennis Motschulsky) feeds on 43 species of trees in 15 families, but its chemosensory mechanisms are poorly understood. Herein, genes encoding 61 odorant-binding proteins (OBPs) were identified from the published genome and our previous ...
Cladocera; absorbance; aquatic communities; benthic ecosystems; carbon; fossils; functional diversity; global cooling; global warming; lakes; latitude; niches; organic matter; refuge habitats; sediments; sexual reproduction; stable isotopes; tundra; Finland; Lapland
Abstract:
... Under fundamental ecosystem changes in high latitude lakes, a functional paleolimnological approach may increase holistic understanding of lake responses and resilience to climate warming. A ~2000-year sediment record from Lake Loažžejávri in the tundra of northern Finnish Lapland was examined for fossil Cladocera assemblages to examine long-term environmental controls on aquatic communitie ...
Chironomidae; climate; ecological function; functional diversity; lakes; regression analysis; species diversity; vegetation cover; water temperature; Argentina
Abstract:
... Functional richness patterns of lake chironomid assemblages have been increasingly studied in the Northern Hemisphere, but so far there are no studies in Southern Hemisphere lakes. Present-day chironomid assemblages were studied from 40 lakes in NW Patagonia to investigate functional and taxonomic diversity and its relationships with the environment. Using multiple regression analysis involving cl ...
... AIM: To assess the impact of climate change on the functional diversity of marine zooplankton communities. LOCATION: The Mediterranean Sea. METHODS: We used the functional traits and geographic distributions of 106 copepod species to estimate the zooplankton functional diversity of Mediterranean surface assemblages for the 1965–1994 and 2069–2098 periods. Multiple environmental niche models were t ...
José Hidasi-Neto; Daiany Caroline Joner; Fernando Resende; Lara de Macedo Monteiro; Frederico Valtuille Faleiro; Rafael Dias Loyola; Marcus Vinicius Cianciaruso
... Anthropogenic climate change has been shown to be one of the most pervasive threats to biodiversity. However, few studies have considered its effects on whole communities. Here, using ecological niche models (ENM) and projected future climate scenarios, we analyzed how these environmental changes could promote reductions in the alpha and beta taxonomic, phylogenetic, and functional diversities of ...
altitude; entropy; functional diversity; leaves; life history; plant height; research; species diversity; vegetation; Iran
Abstract:
... Climate and environmental heterogeneity are currently discussed as the most important drivers of plant diversity along altitudinal gradients. Compared to functional diversity, taxonomic diversity has received much more attention in research on altitudinal gradients, although functional diversity may provide more information on the ecological mechanisms shaping plant diversity. We assessed the impo ...
... Spliceosome disassembly is catalyzed by the NineTeen-related (NTR) complex, which is constituted by several proteins, including Cwc23, Ntr1, and Ppr43. Cwc23 is an essential J-protein in Saccharomyces cerevisiae that recruits Ntr1, an NTC-related G-patch protein, to the spliceosome. Ntr1 interacts with Prp43, a DExD/H box RNA helicase protein, which facilitates the disassembly of spliceosomal inte ...
Catherine Torres de Almeida; Lênio Soares Galvão; Luiz Eduardo de Oliveira Cruz e Aragão; Jean Pierre Henry Balbaud Ometto; Aline Daniele Jacon; Francisca Rocha de Souza Pereira; Luciane Yumie Sato; Aline Pontes Lopes; Paulo Maurício Lima de Alencastro Graça; Camila Valéria de Jesus Silva; Jefferson Ferreira-Ferreira; Marcos Longo
aboveground biomass; absorption; algorithms; canopy; climate change; data collection; ecological footprint; functional diversity; georeferencing; hyperspectral imagery; inventories; leaves; lidar; linear models; prediction; regression analysis; remote sensing; spatial data; tree height; tropical forests; Amazonia; Brazil
Abstract:
... Accurate estimates of aboveground biomass (AGB) in tropical forests are critical for supporting strategies of ecosystem functioning conservation and climate change mitigation. However, such estimates at regional and local scales are still highly uncertain. Airborne Light Detection And Ranging (LiDAR) and Hyperspectral Imaging (HSI) can characterize the structural and functional diversity of forest ...
databases; ecosystems; filters; functional diversity; green roofs; landscapes; models; plant communities; species diversity; urban areas; urbanization; vegetation; Belgium
Abstract:
... QUESTIONS: Extensive green roofs (EGRs) are novel ecosystems and essential tools in mitigating the negative effects of urbanization. However, the extent to which traditional community assembly insights apply to spontaneous plant and trait diversity and composition on EGRs and novel ecosystems in general is unclear: (a) is a dispersal filter present because of EGRs’ fragmented nature (e.g., roof he ...
... Community-weighted mean (CWM) and functional diversity (FD) describe the two aspects of plant communities’ functional structure. While they have been often used separately to infer assembly processes, their covariation can actually provide useful insights into the prevalence of a particular assembly process over the other. We propose a framework where positive or negative covariation of these indi ...
... PURPOSE: Epiphytic bacteria on the surfaces of submerged macrophytes play an important role in lake biodiversity and ecological processes. However, compared with planktonic bacteria, there is poor understanding of the community structure and function of epiphytic bacteria. METHODS: Here, we used 16S rRNA gene high-throughput sequencing and functional prediction analysis to explore the structural a ...
... Poultry production is a major agricultural output worldwide. It is known that the gut health of broilers is essential for their growth and for providing wholesome products for human consumption. Previously, the microbial diversity of broiler ceca was studied at the genetic level. However, the functional diversity and metabolic activity of broiler cecal bacterial communities are not fully investiga ...
functional diversity; high density lipoprotein; monitoring; peptides; proteome
Abstract:
... High-density lipoprotein (HDL) is a diverse group of particles with multiple cardioprotective functions. HDL proteome follows HDL particle complexity. Many proteins were described in HDL, but consistent quantification of HDL protein cargo is still a challenge. To address this issue, the aim of this work was to compare data-independent acquisition (DIA) and parallel reaction monitoring (PRM) method ...
... Habitats being restored in Belgian quarries are easily invaded by non-native plant species, which can hamper the germination and development of vegetation deemed to be of high conservation value. Substrates of terraces created when mining limestone quarries could be inhospitable to native plants. However, they can provide opportunities for establishing specific vegetation, such as dry calcareous g ...
... The competition–defense tradeoff is a significant source of functional diversity in ecological communities. Here, we present a theoretical framework to describe the competition–defense tradeoff and apply it to a size‐based model of a unicellular plankton community. Specifically, we investigate how the emergent community structure depends on the shape of the tradeoff, and on whether the cost of def ...
... In eukaryotes, the nucleus plays key roles in fundamental cellular processes, including DNA replication, chromatin maintenance, transcription, and translation. To better understand the functional diversity of nuclei, we developed a method for the comprehensive extraction of the nuclear proteome from Arabidopsis. We used a buffer with a high sucrose concentration to purify nuclei and then conducted ...
... The conservation of adaptive potential to enable populations and species to respond to environmental change is one of the cornerstones of conservation genetics. To date, however, most work has by necessity focused on neutral markers and demographic questions. Now, with the rapid development of genomic technologies, we have new tools with which to address this essential but poorly understood aspect ...
... Continuing advances in whole genome scale approaches integrated with other ‘omic’ technologies promise to revolutionise understanding about the relevance of genetic variation to risks of species declines and extinctions. In the face of the vastly increased accessibility of such approaches, it is important that we advance beyond descriptive genetics to developing a more functional perspective on wh ...
Carabidae; agri-environmental policy; agricultural land; arable soils; carnivores; community structure; ecological function; ecosystem services; flowering; functional diversity; habitats; herbivores; insect communities; nontarget organisms; phylogeny; pollinators; species richness; weed control
Abstract:
... Agri-environmental schemes aim to promote biodiversity in agricultural landscapes. However, knowledge about the impact of these measures on diversity components beyond species richness, especially for non-target species and their ecological functions, is still very poor. Here, we investigated the response of ground beetle communities to the conversion of arable land into flowering fields, which ar ...
arable soils; bacterial communities; biochemical pathways; chemical analysis; conventional tillage; corn; cover crops; crop rotation; ecosystems; fertilizer application; functional diversity; high-throughput nucleotide sequencing; human health; intensive farming; nitrogen; nitrogen fertilizers; plowing; soil bacteria; soil carbon; soil horizons; soil profiles; sustainable agriculture; topsoil; wheat; Western European region
Abstract:
... Reducing the deleterious effects of intensive tillage and fertilization on ecosystem integrity and human health is challenging for sustainable agriculture. The use of cover crops has been advocated as a suitable technique for this purpose, but scientific evidence to support this has been scarce. After four years and a complete rotation, including wheat, maize, and green pea as main crops in a plou ...
analysis of variance; anthropogenic activities; aquatic communities; aquatic invertebrates; climate; cropland; ecosystems; forests; functional diversity; land use; landscapes; macroinvertebrates; monsoon season; piedmont; rivers; species diversity; sugarcane; water quality; Andes region; Argentina
Abstract:
... Human activities altering ecosystems structure and function worldwide strongly affect rivers. We studied aquatic macroinvertebrate communities (taxonomic and functional diversity) from rivers immersed in a forest matrix and rivers flowing through croplands. As rivers of the region experience a monsoon climate, high and low water seasons were also considered and their effect tested. We expected low ...
Felix Neff; Nico Blüthgen; Melanie N. Chisté; Nadja K. Simons; Juliane Steckel; Wolfgang W. Weisser; Catrin Westphal; Loïc Pellissier; Martin M. Gossner
ecological function; functional diversity; grasslands; habitats; insect communities; land use; landscapes; macroinvertebrates; morphometry; phytophagous insects; species diversity; Germany
Abstract:
... CONTEXT: Insect herbivores comprise the majority of macroinvertebrate communities of temperate grasslands and act as drivers for important ecosystem functions. Landscape- and local-level land use may alter species pools and dispersal possibilities and act as local environmental filters, affecting insect trait composition. OBJECTIVES: While environmental filtering by local land use has repeatedly b ...
... Peat bogs located in high mountains are suitable places to study local environmental responses to climate variability. These ecosystems host a large number of eukaryotes with diverse taxonomic and functional diversity. We carried out a metabarcoding study using universal 18S and COI markers to explore the composition of past and present eukaryotic communities of a Pyrenean peat bog ecosystem. We a ...
functional diversity; biocenosis; community structure; humans; landscapes; equations; tropical forests; data collection; models; phylogeny; predators; Metatheria; synergism; habitat fragmentation; ecological function; small mammals; rodents; South America
Abstract:
... Forest fragmentation and defaunation are considered the main drivers of biodiversity loss, yet the synergistic effects of landscape changes and biotic interactions on assemblage structure have been poorly investigated. Here, we use an extensive dataset of 283 assemblages and 105 species of small mammals to understand how defaunation of medium and large mammals and forest fragmentation change the c ...
agroecosystems; apples; biological control; case studies; cost effectiveness; crop production; crops; finance; fruit growing; functional diversity; growers; human resources; infrastructure; integrated pest management; learning; plant protection; profitability; risk; safety assessment; semiochemicals; stakeholders
Abstract:
... This article assesses the multi-actor co-innovation research that was carried out between 2010 and 2018 by researchers and apple production actors. The aim was to develop sustainable integrated pest management methods that, with the help of an agroecological whole system approach, would be both desirable and feasible to implement in practice. Whilst a novel pest management strategy based on semioc ...
... Qinghai-Tibetan Plateau (QTP), >4000 m known as the “third pole of the earth” and is highly sensitive to nitrogen (N) deposition, understanding the effects of N deposition on multifaceted plant diversity (taxonomy diversity, functional diversity and phylogenetic diversity) in the alpine grasslands of Qinghai-Tibet Plateau are vital for the conservation of alpine plant diversity and the sustainabil ...
altitude; birds; data collection; functional diversity; habitat fragmentation; habitats; montane forests; species richness; Andes region; Ecuador
Abstract:
... Many studies have investigated how habitat fragmentation affects the taxonomic and functional diversity of species assemblages. However, the joint effects of habitat fragmentation and environmental conditions on taxonomic and functional diversity, for instance across elevational gradients, have largely been neglected so far. In this study, we compare whether taxonomic and functional indicators sho ...
... Emissions of greenhouse gases (GHG) such as CO2 and N2O from soils are affected by many factors such as climate change, soil carbon content, and soil nutrient conditions. However, the response patterns and controls of soil CO2 and N2O fluxes to global warming and nitrogen (N) fertilization are still not clear in subalpine forests. To address this issue, ...
... Reductive soil disinfestation (RSD) and chemical soil disinfestation (CSD) are two common agricultural strategies for the elimination of soil-borne pathogens. However, the differences in soil bacterial microbiome and its associated functional characteristics between CSD and RSD are poorly understood. In this study, five soil treatments, un-treated control (CK), CSD with 0.5 t ha−1 dazomet (DZ), RS ...
Formicidae; canopy; community structure; evergreen forests; forest habitats; functional diversity; heat tolerance; landscapes; littoral zone; phylogeny; species richness
Abstract:
... Recent appreciation of the multidimensional nature of biodiversity has prompted biologists to examine the taxonomic, functional, and phylogenetic attributes of natural communities. Simultaneous consideration of such multiple diversity dimensions provides valuable insights into various community assembly processes. We studied the alpha and beta components of ant diversity on a simple island landsca ...
... Seed dispersal is an important ecosystem function, but it is contentious how structural and functional diversity of plant and bird communities are associated with seed-dispersal functions. We used structural equation models to test how structural (i.e., abundance, species richness) and functional diversity (i.e., functional dispersion and community-weighted means of functional traits) of fruiting ...
basins; chronosequences; deforestation; direct seeding; dry season; filters; functional diversity; harvesting; indigenous species; landscapes; life history; new species; pioneer species; recalcitrant seeds; riparian forests; species diversity; understory; watersheds; Brazil
Abstract:
... South Amazon forests have been highly deforested, including the legally protected riparian forests. The Xingu watershed restoration program used direct seeding of native trees to restore 5000 ha of forests from 2006 to 2018. Direct seeding is a low cost method, easy-to-implement at large scales. The literature on this method concludes that only a few species manage to establish successfully, resul ...
... Urban green spaces have been shown to be important hotspots of biodiversity in cities of temperate and humid/semihumid tropical ecoregions. Nonetheless, whether this pattern applies to urban ecosystems of desert environments has been rarely studied. Temperature, precipitation, vegetation complexity, human density, and presence of invasive species could act as urban filters limiting the incidence o ...
... Our aim was to analyze the combined effect of grazing and light on composition, structure, functional diversity (FD) and succession of algal communities in two headwater streams (grassland and pine afforested). We hypothesized that algal communities in the grassland stream are top‐down controlled, as a result of higher grazing; meanwhile, in the afforested stream, algal communities are bottom‐up s ...
... A better understanding of biomass production in secondary forests after cultivation is essential for assessing the resilience of slash and burn systems and their capacity to deliver ecosystem services. Biomass production is influenced by management legacies, landscape configuration and soil, but these drivers are rarely studied simultaneously, nor is the role of changes in vegetation properties in ...
... Seminatural grasslands provide habitats for various species and are important for biodiversity conservation. The understanding of the diverse responses of species and traits to different grassland management methods is therefore urgently needed. We disentangled the role of grassland management (fertilization and irrigation), vegetation structure (biomass, sward height) and plant quality (protein a ...
... Genetic and functional diversity of osmotolerant bacterial endophytes colonizing the root, stem, and leaf tissues of pearl millet genotypes differing in their drought susceptibility was assessed. Two genotypes of pearl millet, viz., the drought tolerant genotype TT-1 and the drought susceptible genotype PPMI-69, were used in the present study. Diazotrophs were found to be the predominant colonizer ...
biomass production; climate; climate change; environmental factors; forest stands; forests; functional diversity; grasslands; mixed stands; soil fertility; species diversity; trees
Abstract:
... Contents Summary 50 I. Introduction 50 II. Drivers of the diversity–productivity relationship 51 III. Patterns of the diversity–productivity relationship 55 IV. Responses of mixed stands to climate change 57 V. Conclusions 60 Acknowledgements 61 References 61 SUMMARY: Although the relationship between species diversity and biomass productivity has been extensively studied in grasslands, the impact ...
Acacia aneura; acoustics; age structure; birds; fauna; functional diversity; habitats; land clearing; linear models; multidimensional scaling; phylogeny; regrowth; semiarid zones; species richness; trees; woodlands; Queensland
Abstract:
... Understanding how native fauna use regrowth vegetation is critical because of increased land clearing rates and biodiversity loss, yet it remains poorly studied in Australia's semi-arid regions. The aim of this study was to use acoustic sensors to monitor avian diversity in three different age classes (new regrowth <15 years, intermediate regrowth 15–30 years, and old growth >30 years) of Acacia d ...
... Intensive forest management leads to forest homogeneity and compromises biodiversity conservation for the sake of a single commodity provision: wood biomass. However, forest biodiversity supports multiple ecosystem functions, with the regulation of insect pest populations among the less understood. We studied how parasitoid functional diversity and composition were affected by forest management an ...
... Several ecological processes intervene in the assembling of plant communities, such as environmental filtering and biotic interactions (e.g., competition, facilitation). The analysis of the distribution of the functional traits of plants helps to identify which of these processes is involved in the succession of a plant community assembly. We analyzed the distribution patterns of two groups of fun ...
functional diversity; phylogeny; species diversity
Abstract:
... It is now commonplace in community ecology to assess patterns of phylogenetic or functional diversity in order to inform our understanding of the assembly mechanisms that structure communities. While both phylogenetic and functional approaches have been used in conceptually similar ways, it is not clear if they both in fact reveal similar community diversity patterns or support similar inferences. ...
... Trait-based approaches to disentangle assembly processes in ecological communities typically rely on average trait values obtained from the literature or databases. Recently, ecologists have shown growing concern in accounting for intraspecific variation in trait-based metrics. Besides intraspecific variation, plants and animals exhibit functional trait variation within the same individual (within ...
... QUESTION: How do biotic forest conditions, in terms of plant functional traits and tree basal area, and soil variables influence old‐growth forest dynamics? LOCATION: A subtropical old‐growth forest in Southern Brazil. METHODS: Forest inventories were conducted in 1999 and 2017, in 24 permanent plots of 500 m². All trees with a circumference at breast height of ≥ 30 cm were measured, identified to ...
biodiversity conservation; carbon; carbon sequestration; climate; environmental factors; forest ecosystems; functional diversity; least squares; models; species diversity; stand age; topography; trees; tropical forests; China
Abstract:
... Tropical and subtropical forest ecosystems play an important role in the global carbon regulation. Despite increasing evidence for effects of biodiversity (species diversity, functional diversity and functional dominance), stand structural attributes, stand age and environmental conditions (climate and topography) on tree carbon storage, the relative importance of these drivers at large scale is p ...
... AIMS: Soil communities are shaped by multiple biotic and environmental components. We assessed the role of multiple factors in shaping soil bacterial and nematode communities in an ongoing plant invasion in western Michigan sand dunes. We aimed to determine which factors were important for structuring soil communities. METHODS: We surveyed seven sites containing the exotic plant, Leymus arenarius, ...
... The gut is hypothesised to play an important role in the development and progression of sepsis. It is however unknown whether the gut microbiome and the gut barrier function is already altered early in sepsis development and whether it is possible to modulate the microbiome in early sepsis. Therefore, a randomised, double blind, placebo-controlled pilot study to examine the alterations of the micr ...
... Predicting the long‐term consequences of habitat alteration for the preservation of biodiversity and ecosystem function requires an understanding of how ecological filters drive taxonomic and functional biodiversity loss. Here, we test a set of predictions concerning the role of ecological filters in restructuring native bee assemblages inhabiting fragmented coastal sage scrub ecosystems in southe ...
... Background: Tropical mountain ecosystems of the Northern Andes have long fascinated researchers because of the unique conditions associated with cold climates in equatorial latitudes. More than six decades have elapsed since the beginning of systematic ecological research in the Venezuelan páramos, making them one of the best-studied tropical alpine regions in the world. Aims: We review the concep ...
... The biological and functional diversity of ectomycorrhizal (ECM) associations remain largely unknown in South America. In Patagonia, the ECM tree Nothofagus pumilio forms monospecific forests along mountain slopes without confounding effects of vegetation on plant–fungi interactions. To determine how fungal diversity and function are linked to elevation, we characterized fungal communities, edaphi ...
... This article discusses the effect of selenium in aqueous solutions on aspects of lipid and amino acid metabolism in the cell biomass of Saccharomyces cerevisiae MYA-2200 and Candida utilis ATCC 9950 yeasts. The yeast biomass was obtained by using waste products (potato wastewater and glycerol). Selenium, at a dose of 20 mg/L of aqueous solution, affected the differentiation of cellular morphology. ...
... The effect of crane fly (Diptera, Tipulidae) larvae on the functional diversity of soil microorganism communities and the intensity of nitrogen and carbon transformation processes in soil has been investigated. The vital activity of larvae in the soil has been shown to significantly accelerate nitrogen fixation, denitrification, and methane production and elevate the functional diversity (the numb ...
... Marine ecosystems are facing major anthropogenic disturbances, including loss of biodiversity, eutrophication, and biological invasions. Thus, attention has raised on marine conservation actions to preserve habitat resilience and biodiversity. Marine Protected Areas (MPAs) play an essential role in marine conservation as they are usually designated to provide marine ecosystem resilience of native ...
... CORE IDEAS: Stockpiling and organic matter admixing effects on reclamation soils were tested. Stockpiling effects were stronger on forest floor based reclamation soils. Organic matter admixing showed fertility and microbial benefits mostly in mineral sub‐soils. A faster microbial assimilation was achieved in soils admixed with forest floor organic matter. Nutrient bioavailability is crucial for ve ...
insects; functional diversity; islands; lakes; habitat fragmentation; habitats; China
Abstract:
... Due to habitat fragmentation, the loss of species diversity has been extensively studied. On the contrary, the effects of habitat fragmentation on functional diversity is still poorly understood. In the Thousand Island Lake, we conducted studies of insect functional diversity on a set of 29 isolated islands. We used 10 functional diversity indices from three aspects (functional richness, functiona ...
community structure; ecosystems; functional diversity; models; nutrient uptake; phytoplankton; species richness; temporal variation
Abstract:
... It is well known that variable resource supply can allow competitors to coexist on a single limiting resource, and this is one mechanism that may explain the maintenance of diversity in paradoxically speciose communities. Ecosystems experience fluctuations in resource supply on a range of timescales, but we have a poor understanding of how multiple frequencies of resource supply affect the mainten ...
biocenosis; butterflies; farms; functional diversity; grasslands; habitats; homogenization; indicator species; intensive farming; land use change; landscapes; organic production; species richness; Spain
Abstract:
... Organic farming can benefit plants and butterflies in terms of species richness and abundance, in particular in homogeneous landscapes. Nevertheless, whether organic farming can benefit functional diversity of these two organism groups is not well understood. Organic farming could benefit functional diversity by counteracting simplification and homogenisation of biotic communities caused by earlie ...
aboveground biomass; belowground biomass; broadleaved evergreens; dominant species; ecological footprint; edaphic factors; evergreen forests; fine roots; forest ecosystems; forest stands; functional diversity; necromass; old-growth forests; stand characteristics; topography; trees
Abstract:
... The positive effects of biodiversity on aboveground biomass in natural terrestrial ecosystems have been well documented, whereas the relationships between tree biodiversity and belowground biomass remain largely unexplored. Traditionally, two sets of hypotheses based on the functional trait approach, niche complementarity (NC) and mass ratio (MR), have been proposed to explain the positive effects ...
... Chironomids (Diptera: Chironomidae) are a family of dipterans with a global distribution. Owing to their great functional diversity and ability to adapt to a wide range of environmental conditions, they often dominate in freshwater macroinvertebrate communities, playing a key role in the cycling of organic matter and the flow of energy in aquatic ecosystems. Our aim was to analyze the structure of ...
... Understanding how inter-specific variation in functional traits affects native and non-native species responses to stream disturbances, is necessary to inform management strategies, providing tools for biomonitoring, conservation and restoration. This study used a functional trait approach to characterise the responses of macrophyte assemblages to reach-scale disturbances (measured by lack of ripa ...
fish; functional diversity; habitats; nestedness; rivers; species diversity
Abstract:
... From a metacommunity perspective, patterns of β‐diversity emerge from the interplay between spatial and environmental processes. For obligate aquatic dispersers, river network constraints can be reflected in diversity patterns. Here, we aimed to determine the effects of environmental heterogeneity and spatial connectivity on β‐diversity components. We sampled fish assemblages in 21 sites across a ...
... Plant communities across multiple climate zones are at risk of invasive species. Understanding the effects of invasive alien species on both the taxonomic and functional diversities of plant communities in different climate zones enables insight into the mechanisms underlying successful invasions. This study investigated the effects of Erigeron canadensis at different degrees of invasion on both t ...
carbon dioxide; climate change; eutrophication; functional diversity; land use change; life cycle assessment; meta-analysis; models; species richness; temperature; variance
Abstract:
... PURPOSE: In life cycle assessments (LCAs), the focus of modelling the impact of human-induced pressures on biodiversity has been mainly on taxonomic diversity measures such as species richness. More recently, increasing availability of trait data and the understanding that functional diversity is more directly related to human-induced pressures suggests functional diversity as a promising metric. ...
... Understanding the mechanisms that underlie species assembly is a central concern in community ecology. Abiotic and biotic filters are probabilistic ‘sieves’ that allow species with certain functional traits to become a part of the community, or not. We manipulated natural plant assemblies in order to identify variations in the timings of biotic and abiotic filters that determine community trait as ...
... The 5′ untranslated region (UTR) of the RNA genomes of enteroviruses possesses an internal ribosome entry site (IRES) that directs translation of the mRNA by binding to ribosomes. Infection with enterovirus D68 causes respiratory symptoms and is sometimes associated with neurological disorders. The number of reports of the viral infection and neurological disorders has increased in 2010s, al ...
climate change; ecosystems; functional diversity; funding; habitat destruction; phylogeny; songbirds; threatened species; North America; South America
Abstract:
... Human‐induced impacts such as climate change and habitat alterations, coupled with limits on funding, have forced conservation actions into a mode of triage. Although no current method has been agreed upon as the best approach to select species for conservation, many studies have demonstrated the utility of incorporating phylogenetic diversity into these decisions. In many cases, degree of phyloge ...
coevolution; community structure; ecological function; fish communities; functional diversity; geographical distribution; indigenous species; keystone species; latitude; marine fish; models; Western Australia
Abstract:
... AIM: Understanding the role of interspecific interactions in maintaining diversity, ecosystem function and evolutionary processes is a major challenge in ecology. Historically, antagonistic heterospecific interactions were the focus of many studies, but the importance of facilitative interactions has become increasingly apparent over recent decades. Ecological networks can provide insights into po ...
... The changes of enzyme activities, microbial community structure and function, and the diversity and resistance level of antibiotic-resistant bacteria (ARB) were studied in soil during ten repeated treatments with chlortetracycline (CTC) and/or ciprofloxacin (CIP) together with organic manure (OM) under laboratory conditions. The activities of neutral phosphatase (NPA) and catalase (CAT) displayed ...
case studies; functional diversity; geographic information systems; regression analysis; roads; social networks; socioeconomic factors; urban areas; urban planning; urbanization; China
Abstract:
... The design and optimization of urban form has always been a hot topic in urban planning and development research. Besides, the creation of continuous vitality in urban areas is of critical importance in the development of urbanization. However, due to the lack of data, it is difficult to measure the effects of urban form on neighborhood vibrancy. Additionally, no uniform conclusion has been drawn ...
... Agricultural intensification is one of the major drivers behind biodiversity loss in Mediterranean agroecosystems. The intensification of olive groves as monoculture in large areas of the southern Spain has had important effects on biodiversity and ecological processes. In the present study, we explore the olive grove soil management practices effects on taxonomic and functional diversity of ants ...
Mikko Tiusanen; Tea Huotari; Paul D. N. Hebert; Tommi Andersson; Ashley Asmus; Joël Bêty; Emma Davis; Jennifer Gale; Bess Hardwick; David Hik; Christian Körner; Richard B. Lanctot; Maarten J. J. E. Loonen; Rauni Partanen; Karissa Reischke; Sarah T. Saalfeld; Fanny Senez‐Gagnon; Paul A. Smith; Ján Šulavík; Ilkka Syvänperä; Christine Urbanowicz; Sian Williams; Paul Woodard; Yulia Zaika; Tomas Roslin
DNA barcoding; Diptera; Hymenoptera; Rosaceae; arthropod communities; ecological function; flowers; functional diversity; genes; mitochondria; phylogeny; phylogeography; pollination; pollinators; seed set; space and time; species richness; temperature; Arctic region
Abstract:
... Pollination is an ecosystem function of global importance. Yet, who visits the flower of specific plants, how the composition of these visitors varies in space and time and how such variation translates into pollination services are hard to establish. The use of DNA barcodes allows us to address ecological patterns involving thousands of taxa that are difficult to identify. To clarify the regional ...
... Non‐native tree plantations constitute a large part of forestation worldwide. Plantations are prone to invasion by exotic herbaceous plant species due to habitat properties, including understory vegetation structure. We established 40 sampling sites in 10 plantation forests. Sites were selected according to tree species (native poplar forests and exotic pine plantations) and common milkweed (Ascle ...
descriptive statistics; educational status; forestry; functional diversity; higher education; markets; models; mung beans; pigeon peas; pigeons; regression analysis; Kenya
Abstract:
... The smallholder direct marketing outlets (private grain traders) serve the smallholder farmers poorly in the rural areas of Kenya, making local markets thin and less competitive. The purpose of this study is to evaluate the diversity and the determinant factors influencing the private grain traders’ performance based on the volumes transacted of green gram and pigeon pea commodities. A multistage ...
... BACKGROUND: Lycium ruthenicum Murray is an important economic plant in China and contains higher levels of anthocyanins in its fruits than other Lyciums. However, the genetic mechanism of anthocyanin production in this plant is unknown. RESULTS: Based on previous transcriptome analysis, LrAN2 and LbAN2, encoding MYB transcription factors, were isolated from L. ruthenicum and L. barbarum, respectiv ...
Dagmar M. Hanz; Katrin Böhning‐Gaese; Stefan W. Ferger; Susanne A. Fritz; Eike Lena Neuschulz; Marta Quitián; Vinicio Santillán; Till Töpfer; Matthias Schleuning
ambient temperature; anthropogenic activities; biogeography; biotic factors; birds; canopy; functional diversity; mountains; phylogeny; vegetation; Andes region; Tanzania
Abstract:
... AIM: It is not yet clear whether similar mechanisms influence the assembly of ecological communities across different continents. Here, we investigated the functional and phylogenetic diversity of bird assemblages along elevational gradients in two biogeographic regions in order to identify how these are driven by biotic factors, such as food resources and vegetation structure, and abiotic factors ...