The interplay between network structure and functioning of detritus-based communities in patchy aquatic environment

Bellisario, Bruno; Cerfolli, Fulvio; Nascetti, Giuseppe

doi:10.1007/s10452-012-9412-1

Cited by 11 publications

(10 citation statements)

References 49 publications

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“…We avoided this issue as much as possible by using a simulated-annealing algorithm, according to [ 41 ]; however, the conclusions reached in this study regarding network modularity are unavoidably limited. Although network modularity is useful for revealing functional architecture in ecological networks [ 42 ], the modules detected based on network topology may be inconsistent with biologically functional modules because the link weight and overlap of functional modules that are observed in real-world networks were not included in this study. To minimize these restrictions, module detection methods for weighted networks [ 28 ] and overlapping communities (e.g., [ 43 , 44 ]) may be useful because they more accurately predict functional modules.…”

Section: Discussionmentioning

confidence: 99%

Human Impacts and Climate Change Influence Nestedness and Modularity in Food-Web and Mutualistic Networks

Takemoto

Kajihara

2016

PLoS ONE

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Theoretical studies have indicated that nestedness and modularity—non-random structural patterns of ecological networks—influence the stability of ecosystems against perturbations; as such, climate change and human activity, as well as other sources of environmental perturbations, affect the nestedness and modularity of ecological networks. However, the effects of climate change and human activities on ecological networks are poorly understood. Here, we used a spatial analysis approach to examine the effects of climate change and human activities on the structural patterns of food webs and mutualistic networks, and found that ecological network structure is globally affected by climate change and human impacts, in addition to current climate. In pollination networks, for instance, nestedness increased and modularity decreased in response to increased human impacts. Modularity in seed-dispersal networks decreased with temperature change (i.e., warming), whereas food web nestedness increased and modularity declined in response to global warming. Although our findings are preliminary owing to data-analysis limitations, they enhance our understanding of the effects of environmental change on ecological communities.

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Section: Discussionmentioning

confidence: 99%

Human Impacts and Climate Change Influence Nestedness and Modularity in Food-Web and Mutualistic Networks

Takemoto

Kajihara

2016

PLoS ONE

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“…The use of food webs for understanding overlap remains a hot topic for research in ecology, but the lack of cohesion in the approaches used to study them still hinders the field (Bellisario et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Chironomidae larvae (Diptera) of Neotropical floodplain: overlap niche in different habitats

Butakka¹,

Ragonha

Takeda

2014

Braz. J. Biol.

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The niche overlap between trophic groups of Chironomidae larvae in different habitats was observed between trophic groups and between different environments in Neotropical floodplain. For the evaluation we used the index of niche overlap (C XY ) and analysis of trophic networks, both from the types and amount of food items identified in the larval alimentary canal. In all environments, the larvae fed on mainly organic matter such as plants fragments and algae, but there were many omnivore larvae. Species that have high values of food items occurred in diverse environments as generalists with great overlap niche and those with a low amount of food items with less overlap niche were classified as specialists. The largest number of trophic niche overlap was observed among collector-gatherers in connected floodplain lakes. The lower values of index niche overlap were predators. The similarity in the diet of different taxa in the same niche does not necessarily imply competition between them, but coexistence when the food resource is not scarce in the environment even in partially overlapping niches.Keywords: aquatic invertebrate, food recourses, food webs, lakes, Upper Paraná River.Larvas de Chironomidae (Diptera) de uma planície de inundação neotropical: sobreposição de nichos em diferentes habitats ResumoA sobreposição de nichos entre grupos tróficos de larvas de Chironomidae em diferentes tipos de ambientes foi verificada entre os grupos tróficos e entre diferentes ambientes em uma planície de inundação Neotropical. Para a avaliação foi utilizado o Índice de Sobreposição de Nicho (C XY ) e análises de redes tróficas, ambos a partir dos tipos e quantidade de itens alimentares identificados no tubo digestivo das larvas. As larvas alimentaram-se em todos os ambientes principalmente de detritos orgânicos como os fragmentos de plantas e algas, porém, verificou-se alto nível de omnívora. As espécies que tem altos valores de itens alimentares ocorreram em diversos ambientes como generalistas e com grande sobreposição de nichos e aqueles com baixos itens alimentares e com menor sobreposição foram classificados como especialistas. O maior número de sobreposição de nichos tróficos foi verificado em coletores-catadores nas lagoas com conexão. Os menores valores do índice foram verificados nos predadores. A semelhança na dieta de diferentes táxons e grupos tróficos em um mesmo nicho não implica, necessariamente, uma competição entre eles, porém uma coexistência quando o recurso alimentar não é escasso no ambiente, mesmo com sobreposição parcial de nichos.Palavras-chave: invertebrados aquáticos, recursos alimentares, rede trófica, lagoas, Alto rio Paraná.

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“…The mechanisms of this mediation are variable and include species' movement (Huffaker, 1958), changes in productivity and biomass (Daufresne and Loreau, 2001), and changes in food web structure (Bellisario et al, 2012). To understand the consequences of humandriven changes, methods for describing and quantifying landscape complexity are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

How are landscape complexity and vegetation structure related across an agricultural frontier in the subtropical Chaco, NW Argentina?

Monmany

Restrepo

et al. 2015

Journal of Arid Environments

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The interplay between network structure and functioning of detritus-based communities in patchy aquatic environment

Cited by 11 publications

References 49 publications

Human Impacts and Climate Change Influence Nestedness and Modularity in Food-Web and Mutualistic Networks

Human Impacts and Climate Change Influence Nestedness and Modularity in Food-Web and Mutualistic Networks

Chironomidae larvae (Diptera) of Neotropical floodplain: overlap niche in different habitats

How are landscape complexity and vegetation structure related across an agricultural frontier in the subtropical Chaco, NW Argentina?

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