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Dive into the research topics where Gustavo Fonseca is active.

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Featured researches published by Gustavo Fonseca.


PLOS ONE | 2017

Regime shifts in coastal lagoons: Evidence from free-living marine nematodes

Sérgio A. Netto; Gustavo Fonseca

We test the validity of using the regime shift theory to account for differences in environmental state of coastal lagoons as a response to variation in connectivity with the sea, using free-living nematodes as a surrogate. The study is based on sediment samples from the inner and outer portions of 15 coastal lagoons (5 open to the sea, 5 intermittently open/closed, and 5 permanently closed lakes) along the southern coast of Brazil. Environmental data suggested that there are two contrasting environmental conditions, with coastal lakes being significantly different from open and intermittent lagoons. Marine nematode assemblages corroborate these two mutually exclusive alternative stable states (open vs. closed systems), but assemblages from the intermittently open/closed lagoons showed a gradual change in species composition between both systems independently of the environmental conditions. The gradient in the structural connectivity among lagoons and the sea, due to their regime shifts, changes the movement of resources and consumers and the internal physico-chemical gradients, directly affecting regional species diversity. Whereas openness to the sea increased similarity in nematode assemblage composition among connected lagoons, isolation increased dissimilarity among closed lagoons. Our results from a large-scale sampling program indicated that as lagoons lose connectivity with the sea, shifting the environmental state, local processes within individual intermittently open/closed lagoons and particularly within coastal lakes become increasingly more important in structuring these communities. The main implication of these findings is that depending on the local stable state we may end up with alternative regional patterns of biodiversity.


Marine Biodiversity | 2014

Editorial: diversity of marine meiofauna on the coast of Brazil

Gustavo Fonseca; Jon L. Norenburg; Maikon Di Domenico

After a first bout of primarily taxonomical effort, meiofauna studies in Brazilian waters remained virtually neglected until the 1990s. At the end of the last century, taxonomical and ecological studies on meiofauna taxa were again published regularly, especially for Nematoda and Copepoda. In this issue, 18 new species are described and ten species are redescribed from seven Phyla. The five ecological articles cover the spatial distribution of forams and amoeba in a lagunar system, the meiofauna associated with biogenic structures, the relationship between nematodes and granulometry, and the response of sandy-beach meiofauna to a natural, short-term pulse of diatoms. All these contributions show the potential of the Brazilian coast for revealing new species and testing small to large-scale hypotheses about ecological processes.


Ecology and Evolution | 2018

Large‐scale distribution patterns of mangrove nematodes: A global meta‐analysis

Marco C. Brustolin; Ivan Nagelkerken; Gustavo Fonseca

Abstract Mangroves harbor diverse invertebrate communities, suggesting that macroecological distribution patterns of habitat‐forming foundation species drive the associated faunal distribution. Whether these are driven by mangrove biogeography is still ambiguous. For small‐bodied taxa, local factors and landscape metrics might be as important as macroecology. We performed a meta‐analysis to address the following questions: (1) can richness of mangrove trees explain macroecological patterns of nematode richness? and (2) do local landscape attributes have equal or higher importance than biogeography in structuring nematode richness? Mangrove areas of Caribbean‐Southwest Atlantic, Western Indian, Central Indo‐Pacific, and Southwest Pacific biogeographic regions. We used random‐effects meta‐analyses based on natural logarithm of the response ratio (lnRR) to assess the importance of macroecology (i.e., biogeographic regions, latitude, longitude), local factors (i.e., aboveground mangrove biomass and tree richness), and landscape metrics (forest area and shape) in structuring nematode richness from 34 mangroves sites around the world. Latitude, mangrove forest area, and forest shape index explained 19% of the heterogeneity across studies. Richness was higher at low latitudes, closer to the equator. At local scales, richness increased slightly with landscape complexity and decreased with forest shape index. Our results contrast with biogeographic diversity patterns of mangrove‐associated taxa. Global‐scale nematode diversity may have evolved independently of mangrove tree richness, and diversity of small‐bodied metazoans is probably more closely driven by latitude and associated climates, rather than local, landscape, or global biogeographic patterns.


Deep-sea Research Part I-oceanographic Research Papers | 2005

Meiofauna communities of continental slope and deep-sea sites off SE Brazil

Sérgio A. Netto; Fabiane Gallucci; Gustavo Fonseca


Ecological Indicators | 2017

Cross-taxon congruence in benthic communities: Searching for surrogates in marine sediments

Guilherme Nascimento Corte; Helio H. Checon; Gustavo Fonseca; Danilo Cândido Vieira; Fabiane Gallucci; Maikon Di Domenico; A. Cecília Z. Amaral


Estuaries and Coasts | 2015

Macroecological Patterns of Estuarine Nematodes

Gustavo Fonseca; Sérgio A. Netto


Journal of Experimental Marine Biology and Ecology | 2017

Addressing biodiversity shortfalls in meiofauna

Gustavo Fonseca; Diego Fontaneto; Maikon Di Domenico


Ecological Indicators | 2016

The need of hypothesis-driven designs and conceptual models in impact assessment studies: An example from the free-living marine nematodes

Gustavo Fonseca; Fabiane Gallucci


Marine Biodiversity | 2014

The state of the art of Xyalidae (Nematoda, Monhysterida) with reference to the Brazilian records

Virág Venekey; Paula Foltran Gheller; Tatiana F. Maria; Marco C. Brustolin; Noelia Kandratavicius; Danilo Cândido Vieira; Simone Brito; Guilherme S. Souza; Gustavo Fonseca


Zootaxa | 2013

Zygonemella : the forgotten genus of the family Xyalidae (Nematoda)

Beatriz Pereira Cunha; Simone Brito; Gustavo Fonseca

Collaboration


Dive into the Gustavo Fonseca's collaboration.

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Thomas Soltwedel

Alfred Wegener Institute for Polar and Marine Research

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Fabiane Gallucci

Alfred Wegener Institute for Polar and Marine Research

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Maikon Di Domenico

Federal University of Paraná

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Fabiane Gallucci

Alfred Wegener Institute for Polar and Marine Research

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Helio H. Checon

State University of Campinas

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Marco C. Brustolin

Federal University of São Paulo

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Simone Brito

University of São Paulo

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