U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

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.

PubAg

Main content area

You searched for: Publication Year 2019 Remove constraint Publication Year: 2019 Subject functional diversity Remove constraint Subject: functional diversity Subject Brazil Remove constraint Subject: Brazil
Start Over

Search

19  Search Results

1 - 19 of 19
Number of results to display per page

Search Results

1. Assessing ecosystem functioning in forests undergoing restoration

Author:
Milena Fermina Rosenfield; Sandra Cristina Müller
Source:
Restoration ecology 2019 v.27 no.1 pp. 158-167
ISSN:
1061-2971
Subject:
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 ...
DOI:
10.1111/rec.12828

2. Combining LiDAR and hyperspectral data for aboveground biomass modeling in the Brazilian Amazon using different regression algorithms

Author:
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
Source:
Remote sensing of environment 2019 v.232 pp. 111323
ISSN:
0034-4257
Subject:
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 ...
DOI:
10.1016/j.rse.2019.111323
CHORUS:
10.1016/j.rse.2019.111323

3. Direct seeded and colonizing species guarantee successful early restoration of South Amazon forests

Author:
Silvia Barbosa Rodrigues; Marina Guimarães Freitas; Eduardo Malta Campos-Filho; Guilherme Henrique Pompiano do Carmo; Junior Micolino da Veiga; Rodrigo Gravina Prates Junqueira; Daniel Luis Mascia Vieira
Source:
Forest ecology and management 2019 v.451 pp. 117559
ISSN:
0378-1127
Subject:
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 ...
DOI:
10.1016/j.foreco.2019.117559

4. Drivers of subtropical forest dynamics: The role of functional traits, forest structure and soil variables

Author:
Kauane M. Bordin; Sandra C. Müller
Source:
Journal of vegetation science 2019 v.30 no.6 pp. 1164-1174
ISSN:
1100-9233
Subject:
biomass; clay fraction; edaphic factors; forest communities; forest dynamics; forest inventory; functional diversity; leaves; linear models; mortality; nitrogen content; old-growth forests; phosphorus content; potassium; soil pH; species diversity; trees; tropical forests; Brazil
Abstract:
... 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 ...
DOI:
10.1111/jvs.12811

5. Functional diversity and composition of Caatinga woody flora are negatively impacted by chronic anthropogenic disturbance

Author:
Elâine M. S. Ribeiro; Madelon Lohbeck; Braulio A. Santos; Víctor Arroyo‐Rodríguez; Marcelo Tabarelli; Inara R. Leal
Source:
journal of ecology 2019 v.107 no.5 pp. 2291-2302
ISSN:
0022-0477
Subject:
Euphorbiaceae; adults; anthropogenic activities; caatinga; ecological footprint; environmental factors; environmental impact; flora; fuelwood; functional diversity; grazing; landscapes; leaf area; leaf mass; leaves; livestock; ontogeny; people; phylogeny; plant communities; prediction; saplings; seedlings; tropical plants; wood density; woody plants; Brazil
Abstract:
... Tropical plant assemblages can be taxonomically and phylogenetically impoverished by chronic anthropogenic disturbance (CAD), such as firewood collection and extensive grazing. However, to what extent the functional dimension responds to CAD is still unclear. Such knowledge is urgently required for predicting, preventing or even reversing the impacts of CAD. Chronic anthropogenic disturbance may o ...
DOI:
10.1111/1365-2745.13177

6. Habitat amount drives the functional diversity and nestedness of anuran communities in an Atlantic Forest fragmented landscape

Author:
Mauricio Almeida‐Gomes; Marcus V. Vieira; Carlos F. D. Rocha; Adriano S. Melo
Source:
Biotropica 2019 v.51 no.6 pp. 874-884
ISSN:
0006-3606
Subject:
Anura; aquatic environment; ecosystems; frogs; functional diversity; habitat fragmentation; habitats; humans; indigenous species; landscapes; nestedness; rivers; species diversity; streams; Brazil
Abstract:
... Natural environments disturbed by human activities can suffer from species extinctions, but some can still harbor high taxonomic diversity. However, disturbances may have impacts beyond the species level, if the species lost represent unique functions in the ecosystem. In this study, we evaluated to what extent the amount of habitat can determine the functional diversity and nestedness of amphibia ...
DOI:
10.1111/btp.12687

7. Long‐term effects of grazing intensity on strategies and spatial components of functional diversity in subtropical grassland

Author:
Felícia M. Fischer; Olivier J. F. Bonnet; Ian M. Cezimbra; Valério D. Pillar
Source:
Applied vegetation science 2019 v.22 no.1 pp. 39-47
ISSN:
1402-2001
Subject:
cattle; defoliation; entropy; functional diversity; grasslands; grazing intensity; grazing management; leaves; linear models; long term effects; pastures; plant communities; regrowth; species diversity; vegetation structure; Brazil
Abstract:
... QUESTION: How does grazing intensity affect plant community functional traits and the spatial components of functional diversity in subtropical grasslands? LOCATION: Long‐term cattle grazing management experiment in subtropical Campos grassland, southern Brazil. METHODS: Fourteen experimental units (paddocks) maintained under seven grazing intensity treatments for 26 years. In each paddock, we rec ...
DOI:
10.1111/avsc.12402

8. Loss of Generalist Plant Species and Functional Diversity Decreases the Robustness of a Seed Dispersal Network

Author:
Vinicius AG Bastazini; Vanderlei J Debastiani; Bethânia O Azambuja; Paulo R Guimarães; Valério D Pillar
Source:
Environmental conservation 2019 v.46 no.1 pp. 52-58
ISSN:
1469-4387
Subject:
extinction; functional diversity; seed dispersal; woody plants; Brazil
Abstract:
... Understanding cascading effects of species loss is a major challenge for ecologists. Traditionally, the robustness of ecological networks has been evaluated based on simulation studies where primary extinctions occur at random or as a function of species specialization, ignoring other important biological factors. Here, we estimate the robustness of a seed dispersal network from a grassland–forest ...
DOI:
10.1017/S0376892918000334

9. Spatio‐temporal scaling of biodiversity in acoustic tropical bird communities

Author:
Ulisses de Camargo; Tomas Roslin; Otso Ovaskainen
Source:
Ecography 2019 v.42 no.11 pp. 1936-1947
ISSN:
0906-7590
Subject:
automation; bioacoustics; ecological restoration; environmental monitoring; functional diversity; habitat fragmentation; habitats; old-growth forests; primary forests; secondary forests; space and time; species diversity; tropical birds; tropical rain forests; vocalization; Brazil
Abstract:
... Automated analysis of acoustic communities is a rapidly emerging approach for the characterization and monitoring of biodiversity. To evaluate its utility, we should verify that such ‘bioacoustics’ can accurately detect ecological signal in spatiotemporal acoustic data. Targeting the ‘Biological Dynamics of Forest Fragments Project’ sites in Brazil, we ask: What is the relative contribution of the ...
DOI:
10.1111/ecog.04544

10. Species richness and functional structure of fish assemblages in three freshwater habitats: effects of environmental factors and management

Author:
Jamile Queiroz‐Sousa; Sally A. Keith; Gianmarco S. David; Heleno Brandão; André B. Nobile; Jaciara V. K. Paes; Ana C. Souto; Felipe P. Lima; Reinaldo J. Silva; Raoul Henry; Katherine Richardson
Source:
Journal of fish biology 2019 v.95 no.4 pp. 1125-1136
ISSN:
0022-1112
Subject:
detritivores; fish communities; freshwater; freshwater fish; functional diversity; introduced species; piscivores; species abundance; species richness; Brazil
Abstract:
... In this study, the inverted trophic hypothesis was tested in the freshwater fish communities of a reservoir. The distribution of fish species in three freshwater habitats in the Jurumirim Reservoir, Brazil, was examined using both species richness and the relative proportions of different trophic groups. These groups were used as a proxy for functional structure in an attempt to test the ability o ...
DOI:
10.1111/jfb.14109

11. The effect of agriculture on the seasonal dynamics and functional diversity of benthic biofilm in tropical headwater streams

Author:
Ricardo H. Taniwaki; Christoph D. Matthaei; Tatima K. M. Cardoso; Silvio F. B. Ferraz; Luiz A. Martinelli; Jeremy J. Piggott
Source:
Biotropica 2019 v.51 no.1 pp. 18-27
ISSN:
0006-3606
Subject:
algae; aquatic food webs; watersheds; sugarcane; anthropogenic activities; aquatic ecosystems; Bacillariophyceae; functional diversity; pastures; human development; tropics; bioenergy; water temperature; runoff; land use change; stream flow; riparian forests; biomass; endangered ecosystems; biofilm; nutrient availability; streams; rain; nitrates; Brazil
Abstract:
... Tropical streams are one of the most endangered ecosystems in the world due to the constant pressures from human activities. Among these activities, agriculture represents a land use that is crucial for human development but also a key driver of stream degradation and biodiversity decline in the tropics. Against this background, we investigated indirect effects of agriculture (alterations in strea ...
DOI:
10.1111/btp.12617

12. The effects of dams on macroinvertebrates: Global trends and insights

Author:
Jun Wang; Liuyong Ding; Juan Tao; Chengzhi Ding; Daming He
Source:
River research and applications 2019 v.35 no.6 pp. 702-713
ISSN:
1535-1459
Subject:
aquatic organisms; biogeochemistry; dams (hydrology); ecosystems; food webs; functional diversity; macroinvertebrates; rivers; Australia; Brazil; China; Poland; United States
Abstract:
... Dams threaten a wide range of aquatic organisms in most rivers and are thus a primary cause of global biodiversity degradation. Although macroinvertebrates play important roles in biogeochemical processes and ecosystem structuring and functioning through food web links, a global overview of research on their responses to dam construction and the subsequent flow alteration is lacking. This study bi ...
DOI:
10.1002/rra.3431

13. Biodiversity conservation in urban parks: a study of ground-dwelling ants (Hymenoptera: Formicidae) in Rio de Janeiro City

Author:
Marcus Nascimento Santos; Jacques H. C. Delabie; Jarbas M. Queiroz
Source:
Urban ecosystems 2019 v.22 no.5 pp. 927-942
ISSN:
1083-8155
Subject:
Monomorium floricola; Paratrechina longicornis; Pheidole megacephala; Tetramorium; biodiversity conservation; canopy; community structure; environmental factors; forests; functional diversity; habitats; introduced species; plants (botany); public parks; sardines; soil compaction; urban areas; urban parks; Brazil
Abstract:
... Urban green recreational spaces may provide habitat for animals and plants. We investigated the importance of urban public parks in the city of Rio de Janeiro with regard to the conservation of ant species by comparing both the structure of the ground-dwelling ant community between urban parks and continuous forests and the influence of environmental factors on possible differences. Fifteen urban ...
DOI:
10.1007/s11252-019-00872-8

14. Cyanobacteria dominance drives zooplankton functional dispersion

Author:
Iollanda I. P. Josué; Simone J. Cardoso; Marcela Miranda; Maíra Mucci; Kemal Ali Ger; Fabio Roland; Marcelo Manzi Marinho
Source:
Hydrobiologia 2019 v.831 no.1 pp. 149-161
ISSN:
0018-8158
Subject:
Cyanobacteria; aquatic ecosystems; aquatic food webs; biomass; chlorophyll; ecological function; eutrophication; functional diversity; lakes; phytoplankton; total phosphorus; water quality; zooplankton; Brazil
Abstract:
... Accelerated eutrophication reduces water quality and shifts plankton communities. However, its effects on the aquatic food web and ecosystem functions remain poorly understood. Within this context, functional ecology can provide valuable links relating community traits to ecosystem functioning. In this study, we assessed the effects of eutrophication and cyanobacteria blooms on zooplankton functio ...
DOI:
10.1007/s10750-018-3710-0

15. Different bat guilds have distinct functional responses to elevation

Author:
Matheus Camargo Silva Mancini; Rafael de Souza Laurindo; Frederico Hintze; Rodrigo de Macêdo Mello; Renato Gregorin
Source:
Acta oecologica 2019 v.96 pp. 35-42
ISSN:
1146-609X
Subject:
functional diversity; forests; linear models; Chiroptera; entropy; understory; ecological function; fauna; Neotropics; Brazil
Abstract:
... Understanding biodiversity's responses to environmental variations is a challenging task in ecological research. Under a functional perspective, studies have shown that environmental alterations can affect organisms' traits that are related to their performance, fitness and ecological functions. In the present study, we evaluated how the diversity and functional traits of two distinct bat guilds a ...
DOI:
10.1016/j.actao.2019.03.004

16. Ecophysiological performance of four species of Clusiaceae with different modes of photosynthesis in a mosaic of riverine, rupestrian grasslands, and cerrado vegetation in SE-Brazil

Author:
Eduardo A. de Mattos; Fabio R. Scarano; Pedro O. Cavalin; G. Wilson Fernandes; Heinz Rennenberg; Ulrich Lüttge
Source:
Trees 2019 v.33 no.3 pp. 641-652
ISSN:
0931-1890
Subject:
C3 photosynthesis; C3 plants; Calophyllum brasiliense; Clusia; Kielmeyera; acclimation; cerrado; dry season; ecophysiology; environmental factors; forests; functional diversity; grasslands; habitats; photoinhibition; rivers; species diversity; taxonomy; water supply; wet season; Brazil
Abstract:
... KEY MESSAGE: Among four species of Clusiaceae (sensu lato) occurring in a mosaic of different types of tropical vegetation, Kielmeyera coriacea Mart. & Zucc. and Calophyllum brasiliense Camb. were C₃-species with similar performance at micro-sites of contrasting water supply, Clusia criuva Cambess—although potentially a C₃/CAM intermediate species—performed C₃-photosynthesis, while Clusia arrudea ...
DOI:
10.1007/s00468-018-1805-x

17. Influences of the area, shape and connectivity of coastal lakes on the taxonomic and functional diversity of fish communities in Southern Brazil

Author:
Sandra M. Hartz; Elise A. Rocha; Fernanda T. Brum; André L. Luza; Taís de F.R. Guimarães; Fernando G. Becker
Source:
Zoologia 2019 v.36 pp. 1-12
ISSN:
1984-4689
Subject:
area; dimensions; estuaries; fish; fish communities; freshwater; functional diversity; gillnets; lakes; landscapes; models; path analysis; sampling; shape; species diversity; watersheds; Brazil
Abstract:
... In this study we investigated the influence of landscape variables on the alpha taxonomic and functional diversity of fish communities in coastal lakes. We built an analytical framework that included possible causal connections among variables, which we analyzed using path analysis. We obtained landscape metrics for the area, shape and connectivity (estuary connectivity and primary connectivity to ...
DOI:
10.3897/zoologia.36.e23539

18. Patterns of taxonomic and functional diversity of dung beetles in a human-modified variegated landscape in Brazilian Cerrado

Author:
César M. A. Correa; Rodrigo F. Braga; Anderson Puker; Vanesca Korasaki
Source:
Journal of insect conservation 2019 v.23 no.1 pp. 89-99
ISSN:
1366-638X
Subject:
Hydrochoerus hydrochaeris; Urochloa; bait traps; biodiversity conservation; cerrado; dung beetles; ecosystems; fauna; feces; functional diversity; humans; landscapes; livestock; pastures; pitfall traps; riparian forests; rodents; species abundance; species richness; Brazil
Abstract:
... The Brazilian Cerrado harbors great floristic and structural diversity composed of a mosaic of natural vegetation types and anthropogenic environments such as introduced pastures. Here, our goal was to evaluate the patterns of taxonomic and functional diversity of dung beetles in a human-modified landscape in Brazilian Cerrado. For this, we evaluated the species richness, species composition and a ...
DOI:
10.1007/s10841-018-00118-6

19. The effects of grassland ecosystem afforestation on avian phylogenetic diversity, taxonomic diversity and evolutionary distinctiveness

Author:
Lucilene I. Jacoboski; André L. Luza; Raquel K. Paulsen; Angelo M. Pezda; Sandra M. Hartz
Source:
Acta oecologica 2019 v.99 pp. 103449
ISSN:
1146-609X
Subject:
Eucalyptus; afforestation; birds; cattle production; ecosystems; forest habitats; forest plantations; functional diversity; grasslands; phylogeny; riparian forests; species diversity; Brazil
Abstract:
... Forest plantations are among the main threats to the grassland ecosystems of southeastern South America. One key question is whether such plantations affect the evolutionary diversity of bird communities, since previous studies have shown a reduction in taxonomic and functional diversity. High levels of phylogenetic diversity can ensure the conservation of communities, and high evolutionary potent ...
DOI:
10.1016/j.actao.2019.103449