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You searched for: Subject Brazil Remove constraint Subject: Brazil Subject term ecosystems Remove constraint Subject term: ecosystems Subject term detritivores Remove constraint Subject term: detritivores
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1. Effects of defoliation frequencies on above- and belowground biodiversity and ecosystem processes in subtropical grasslands of southern Brazil

Author:
Bruna Claudia S. Jorge; Felícia M. Fischer; Vanderlei J. Debastiani; Daniela Hoss; Valério D. Pillar; Bruna Winck
Source:
Pedobiologia 2022 v.90 pp. 150786
ISSN:
0031-4056
Subject:
Collembola; aboveground biomass; biodiversity; biomass production; defoliation; detritivores; ecosystems; grasslands; microclimate; plant communities; soil biota; Brazil
Abstract:
... The links between vegetation and soil biota are responsible for a variety of ecosystem processes and services that can be affected by grazing. In this study, we aimed to evaluate the effects of grazing frequency in natural grasslands’ biodiversity (plant and collembola communities) and on ecosystem processes (decomposition and biomass accumulation). For so, we carried out a clipping experiment ove ...
DOI:
10.1016/j.pedobi.2021.150786

2. Human impacts alter the distribution of fish functional diversity in Neotropical stream system

Author:
Lucas Milani Pereira; Bárbara Dunck; Evanilde Benedito
Source:
Biotropica 2021 v.53 no.2 pp. 536-547
ISSN:
0006-3606
Subject:
Neotropics; Poecilia reticulata; detritivores; ecological function; ecosystems; fish; functional diversity; habitat preferences; head; humans; land use; mouth; occupations; reproduction; rivers; streams; Brazil
Abstract:
... Evaluation of traits and functional diversity make assessments more robust when determining the nature and strength of the relationship between species and ecosystem processes. We investigated how anthropic interference and physical and limnological characteristics of streams changed fish functional trait distribution and their functional diversity in Neotropical streams located in Southern Brazil ...
DOI:
10.1111/btp.12896

3. Influence of Land-Use Classes on the Functional Structure of Fish Communities in Southern Brazilian Headwater Streams

Author:
Amanda Saldanha Barbosa; Mateus Marques Pires; Uwe Horst Schulz
Source:
Environmental management 2020 v.65 no.5 pp. 618-629
ISSN:
0364-152X
Subject:
agricultural land; detritivores; diet; ecosystems; electrical conductivity; fish communities; foraging; forests; functional diversity; habitats; indigenous species; land use change; landscapes; silviculture; streams; urban areas; water quality; water temperature; Brazil
Abstract:
... Changes in landscape composition caused by conversion of natural habitats into human-altered ecosystems can directly influence the physical characteristics of stream networks. Such impacts can modify the functional structure of fish communities, although the exact consequences of anthropic land-use changes can be context-dependent. This study investigated the influence of different land-use classe ...
DOI:
10.1007/s00267-020-01274-9

4. 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

5. Complementarity among otter trawl, cast net, and encircling gill net improves the characterization of a subtropical subtidal fish assemblage

Author:
Riguel Feltrin Contente; Carmen Lucia del Bianco Rossi‐Wongtschowski
Source:
Journal of applied ichthyology 2019 v.35 no.6 pp. 1189-1196
ISSN:
0175-8659
Subject:
Centropomidae; Gerreidae; Mugilidae; Sciaenidae; adults; demersal fish; detritivores; ecosystems; fauna; gears; gillnets; juveniles; monitoring; pelagic fish; piscivores; planktivores; research programs; sardines; species abundance; species richness; trawl nets; tropical fish; Brazil
Abstract:
... We investigated the combined use of cast net (CN), otter trawl (OT), and encircling gill net (EG) to characterize the richness, composition, and abundance of species and functional groups of the subtidal fish assemblage in a subtropical shallow ecosystem in Brazil. Our hypothesis, that this combination would improve faunal characterization, was supported. The CN best sampled small pelagic planktiv ...
DOI:
10.1111/jai.13950

6. Influence of the flood pulse on mercury accumulation in detritivorous, herbivorous and omnivorous fish in Brazilian Amazonia

Author:
Lucas Silva Azevedo; Inácio Abreu Pestana; Adriely Ferreira da Costa Nery; Wanderley Rodrigues Bastos; Cristina Maria Magalhães Souza
Source:
Ecotoxicology 2019 v.28 no.4 pp. 478-485
ISSN:
0963-9292
Subject:
detritivores; ecosystems; fish; herbivores; lakes; mercury; muscles; omnivores; rivers; seasonal variation; watersheds; Amazonia; Brazil
Abstract:
... Hg accumulation in fish is influenced by several factors including seasonality. In the Amazon, ecosystems are marked by strong seasonal variation in precipitation, which leads to drastic changes in the water level of lakes and rivers. The aim of this study was to evaluate Hg levels in muscle of detritivorous, herbivorous and omnivorous fish from an Amazon lake (Madeira River Basin, Amazonas, Brazi ...
DOI:
10.1007/s10646-019-02044-y

7. Houseflies speaking for the conservation of natural areas: a broad sampling of Muscidae (Diptera) on coastal plains of the Pampa biome, Southern Brazil

Author:
Ândrio Zafalon-Silva; Frederico Dutra Kirst; Rodrigo Ferreira Krüger
Source:
Revista Brasileira de entomologia 2018 v.62 no.4 pp. 292-303
ISSN:
0085-5626
Subject:
Musca domestica; carnivores; cattle; coastal plains; conservation areas; detritivores; ecosystems; fauna; insects; invasive species; inventories; population ecology; streams; surveys; Brazil
Abstract:
... The Brazilian Coastal Plain of the Pampa Biome (CPPB), has suffered fragmentation caused by resource extraction and cattle raising. In turn, conservation proposals are needed to prevent the anthropisation of Pampa natural areas. The first step towards conservation proposals by using insects is fauna inventories, providing data support for legislators. Thus, we undertook a regional and broad-scale ...
DOI:
10.1016/j.rbe.2018.09.002

8. Food web structure shaped by habitat size and climate across a latitudinal gradient

Author:
Gustavo Q. Romero; Gustavo C. O. Piccoli; Paula M. de Omena; Thiago Gonçalves‐Souza
Source:
Ecology 2016 v.97 no.10 pp. 2705-2715
ISSN:
0012-9658
Subject:
Bromeliaceae; Zygoptera; climatic factors; detritivores; detritus; ecosystems; habitats; heat; home range; latitude; linear models; predators; prediction; temperature; trophic levels; water holding capacity; Brazil
Abstract:
... Habitat size and climate are known to affect the trophic structure and dynamics of communities, but their interactive effects are poorly understood. Organisms from different trophic levels vary in terms of metabolic requirements and heat dissipation. Indeed, larger species such as keystone predators require more stable climatic conditions than their prey. Likewise, habitat size disproportionally a ...
DOI:
10.1002/ecy.1496

9. Artisanal fishing of spiny lobsters with gillnets — A significant anthropic impact on tropical reef ecosystem

Author:
Bruno Welter Giraldes; Angela Zacaron Silva; Fabio M. Corrêa; David M. Smyth
Source:
Global ecology and conservation 2015 v.4 pp. 572-580
ISSN:
2351-9894
Subject:
Panulirus; artisanal fishing; bycatch; crabs; detritivores; ecosystems; fauna; fish; fishermen; gillnets; habitats; herbivores; lobsters; reefs; traditional technology; Brazil
Abstract:
... Artisanal fishing activity with gillnets to capture the spiny lobster is a common practice along the coastal reefs of Brazil. This research aims to understand the impact that this artisanal fishing practice is having on the coastal reef systems analysing its associated fauna (bycatch) and the stock of the target species Panulirus echinatus. The study compared an area which was subjected to intense ...
DOI:
10.1016/j.gecco.2015.10.008

10. Assessment of biotic condition of Atlantic Rain Forest streams: A fish-based multimetric approach

Author:
Bianca de Freitas Terra; Robert M. Hughes; Marcio Rocha Francelino; Francisco Gerson Araújo
Source:
Ecological indicators 2013 v.34 pp. 136-148
ISSN:
1470-160X
Subject:
Characiformes; biomass; detritivores; ecosystems; humans; rain forests; screening; species diversity; streams; watersheds; Brazil
Abstract:
... We developed a preliminary fish-based multimetric index (MMI) to assess biotic condition of Atlantic Rain Forest streams in Southeastern Brazil. We used least-disturbed sites as proxies of reference conditions for metric development. To determine the disturbance gradient we used an Integrated Disturbance Index (IDI) that summarized the multiple disturbances measured at local/regional catchment sca ...
DOI:
10.1016/j.ecolind.2013.05.001

11. Burning effects on detritivory and litter decay in Campos grasslands

Author:
Luciana R. Podgaiski; Camila Silva Goldas; Claire P. R. Ferrando; Fernanda S. Silveira; Fernando Joner; Gerhard E. Overbeck; Milton Souza Mendonça Jr; Valério D. Pillar
Source:
Austral ecology 2014 v.39 no.6 pp. 686-695
ISSN:
1442-9985
Subject:
burning; canopy; detritivores; ecosystems; forage quality; grasslands; habitats; heat; humidity; mortality; photolysis; shrubs; soil ecology; soil fauna; solar radiation; Brazil
Abstract:
... Disturbances are primary forces creating spatial heterogeneity in ecosystems, and inducing changes on biological communities, abiotic characteristics and ecological processes. Here we focus on the effects of fire disturbance in the decomposition process at subtropical Campos grasslands in South Brazil, where burns are traditionally used to reduce shrub encroachment, and improve forage quality. We ...
DOI:
10.1111/aec.12132

12. Trophic relationships and mercury biomagnification in Brazilian tropical coastal food webs

Author:
Tatiana Lemos Bisi; Gilles Lepoint; Alexandre de Freitas Azevedo; Paulo Renato Dorneles; Leonardo Flach; Krishna Das; Olaf Malm; José Lailson-Brito
Source:
Ecological indicators 2012 v.18 no. pp. 291-302
ISSN:
1470-160X
Subject:
macroalgae; diet; dolphins; Crustacea; bioaccumulation; invertebrates; mercury; muscles; detritivores; nitrogen; nitrogen fixation; Cephalopoda; carbon; fish; ecosystems; food chain; stable isotopes; Brazil
Abstract:
... The present study investigated trophic relationships and mercury flow through food webs of three tropical coastal ecosystems: Guanabara, Sepetiba and Ilha Grande bays. The investigation was carried out through carbon and nitrogen stable isotopes (δ¹³C, δ¹⁵N) and total mercury (THg) determination in muscle from 35 species, including crustacean, cephalopod, fish and dolphin species. Detritivorous sp ...
DOI:
10.1016/j.ecolind.2011.11.015