Fragment edge and isolation affect the food web: effects on the strength of interactions among trophic guilds
Abstract Habitat loss and fragmentation are processes that may affect communities by changing species interactions. These changes occur because the strength of linkages between species is not exclusively dependent on predator and prey traits. Species interaction changes also depend on the spatial co...
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| Published in | Biota neotropica Vol. 16; no. 2 |
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| Main Authors | , , , , , , |
| Format | Journal Article |
| Language | English |
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01.01.2016
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| Abstract | Abstract Habitat loss and fragmentation are processes that may affect communities by changing species interactions. These changes occur because the strength of linkages between species is not exclusively dependent on predator and prey traits. Species interaction changes also depend on the spatial context in which they take place. We used structural equation modelling to evaluate effects of these processes at patch-scale on top-down and bottom-up controls in food webs in Atlantic Forest. The model was composed of multiple species, and trophic guilds responded differently to fragment edge and isolation. Changes in bottom-up and top-down controls were mainly related to intermediate predator interactions. Efforts to restore connectivity among fragments should help recover the equilibrium of the trophic interactions by benefiting intermediate predators. |
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| AbstractList | Abstract Habitat loss and fragmentation are processes that may affect communities by changing species interactions. These changes occur because the strength of linkages between species is not exclusively dependent on predator and prey traits. Species interaction changes also depend on the spatial context in which they take place. We used structural equation modelling to evaluate effects of these processes at patch-scale on top-down and bottom-up controls in food webs in Atlantic Forest. The model was composed of multiple species, and trophic guilds responded differently to fragment edge and isolation. Changes in bottom-up and top-down controls were mainly related to intermediate predator interactions. Efforts to restore connectivity among fragments should help recover the equilibrium of the trophic interactions by benefiting intermediate predators. |
| Author | Morais, Maristela Calvente D'Anunciação, Paula Eveline Ribeiro Barbosa, Carina Santos Melo, Michele Molina Hasui, Érica Silva, Vinícius Xavier da Silva, Cristina Magalhães |
| AuthorAffiliation | Universidade Federal de Lavras Universidade Federal de Alfenas |
| AuthorAffiliation_xml | – name: Universidade Federal de Alfenas – name: Universidade Federal de Lavras |
| Author_xml | – sequence: 1 givenname: Michele Molina surname: Melo fullname: Melo, Michele Molina organization: Universidade Federal de Alfenas – sequence: 2 givenname: Cristina Magalhães surname: Silva fullname: Silva, Cristina Magalhães organization: Universidade Federal de Alfenas – sequence: 3 givenname: Carina Santos surname: Barbosa fullname: Barbosa, Carina Santos organization: Universidade Federal de Alfenas – sequence: 4 givenname: Maristela Calvente surname: Morais fullname: Morais, Maristela Calvente organization: Universidade Federal de Alfenas – sequence: 5 givenname: Paula Eveline Ribeiro surname: D'Anunciação fullname: D'Anunciação, Paula Eveline Ribeiro organization: Universidade Federal de Lavras – sequence: 6 givenname: Vinícius Xavier da surname: Silva fullname: Silva, Vinícius Xavier da organization: Universidade Federal de Alfenas – sequence: 7 givenname: Érica surname: Hasui fullname: Hasui, Érica organization: Universidade Federal de Alfenas |
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| DocumentTitleAlternate | Borda e isolamento dos fragmentos afetam a cadeia alimentar: efeitos sobre a força de interação entre guildas tróficas |
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| Keywords | paisagem patch-scale patch size predator-prey interaction aves Brasil connectivity mammal mamíferos cascata trófica conectividade bird Brazil trophic cascade escala ao nível da mancha tamanho da mancha Atlantic Forest Mata Atlântica landscape interação predador-presa |
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| Snippet | Abstract Habitat loss and fragmentation are processes that may affect communities by changing species interactions. These changes occur because the strength of... |
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| Title | Fragment edge and isolation affect the food web: effects on the strength of interactions among trophic guilds |
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