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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fragmented tropical forests lose mutualistic plant-animal interactions

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Author(s):
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Marjakangas, Emma-Liina [1] ; Abrego, Nerea [1, 2] ; Grotan, Vidar [1] ; de Lima, Renato A. F. [3] ; Bello, Carolina [4] ; Bovendorp, Ricardo S. [4] ; Culot, Laurence [5] ; Hasui, Erica [6] ; Lima, Fernando [4, 7] ; Muylaert, Renata Lara [4] ; Niebuhr, Bernardo Brandao [4] ; Oliveira, Alexandre A. [3] ; Pereira, Lucas Augusto [5] ; Prado, Paulo I. [3] ; Stevens, Richard D. [8, 9] ; Vancine, Mauricio Humberto [4] ; Ribeiro, Milton Cezar [4] ; Galetti, Mauro [4, 10] ; Ovaskainen, Otso [1, 11]
Total Authors: 19
Affiliation:
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[1] Norwegian Univ Sci & Technol, Ctr Biodivers Dynam, Realfagbygget E1-137, Hogskoleringen 5, Trondheim - Norway
[2] Univ Helsinki, Dept Agr Sci, Helsinki - Finland
[3] Univ Sao Paulo, Inst Biociencias, Dept Ecol, Sao Paulo - Brazil
[4] Univ Estadual Paulista UNESP, Dept Ecol, Inst Biociencias, Rio Claro - Brazil
[5] Univ Estadual Paulista UNESP, Inst Biociencias, Dept Zool, Ctr Aquicultura, Rio Claro - Brazil
[6] Univ Fed Alfenas, Inst Ciencias Natureza, Alfenas - Brazil
[7] IPE, Nazare Paulista - Brazil
[8] Texas Tech Univ, Dept Nat Resources Management, Lubbock, TX - USA
[9] Museum Texas Tech Univ, Lubbock, TX - USA
[10] Univ Miami, Dept Biol, Miami, FL - USA
[11] Univ Helsinki, Fac Biol & Environm Sci, Helsinki - Finland
Total Affiliations: 11
Document type: Journal article
Source: DIVERSITY AND DISTRIBUTIONS; v. 26, n. 2 NOV 2019.
Web of Science Citations: 2
Abstract

Aim Forest fragmentation is among the principal causes of global biodiversity loss, yet how it affects mutualistic interactions between plants and animals at large spatial scale is poorly understood. In particular, tropical forest regeneration depends on animal-mediated seed dispersal, but the seed-dispersing animals face rapid decline due to forest fragmentation and defaunation. Here, we assess how fragmentation influences the pairwise interactions between 407 seed disperser and 1,424 tree species in a highly fragmented biodiversity hotspot. Location Atlantic Forest, South America. Methods We predicted interaction networks in 912 sites covering the entire biome by combining verified interaction data with co-occurrence probabilities obtained from a spatially explicit joint species distribution model. We identified keystone seed dispersers by computing a species-specific keystone index and by selecting those species belonging to the top 5% quantile. Results We show that forest fragmentation affects seed dispersal interactions negatively, and the decreased area of functionally connected forest, rather than increased edge effects, is the main driver behind the loss of interactions. Both the seed disperser availability for the local tree communities and in particular the proportion of interactions provided by keystone seed dispersers decline with increasing degree of fragmentation. Importantly, just 21 keystone species provided >40% of all interactions. The numbers of interactions provided by keystone and non-keystone species, however, were equally negatively affected by fragmentation, suggesting that seed dispersal interactions may not be rewired under strong fragmentation effects. Conclusions We highlight the importance of understanding the fragmentation-induced compositional shifts in seed disperser communities as they may lead to lagged and multiplicative effects on tree communities. Our results illustrate the utility of model-based prediction of interaction networks as well as model-based identification of keystone species as a tool for prioritizing conservation efforts. Similar modelling approaches could be applied to other threatened ecosystems and interaction types globally. (AU)

FAPESP's process: 15/17739-4 - Landscape effects and the interaction between mammals and hantavirus in the Atlantic Forest
Grantee:Renata de Lara Muylaert
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/08722-5 - The role of functional diversity in structuring tropical tree communities: a model-based approach
Grantee:Renato Augusto Ferreira de Lima
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/01986-0 - Ecological consequences of defaunation in the Atlantic Rainforest
Grantee:Mauro Galetti Rodrigues
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/09676-8 - Effect of Landscape Modifications and Climate Changes on the Persistence of Amphibians in the Atlantic Forest
Grantee:Maurício Humberto Vancine
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/25441-0 - Changes in functional and phylogenetic diversity of small mammals in defaunated Atlantic Forest landscapes
Grantee:Ricardo Siqueira Bovendorp
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/14739-0 - The effect of fragmentation on primate ecological functions
Grantee:Laurence Marianne Vincianne Culot
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/50421-2 - New sampling methods and statistical tools for biodiversity research: integrating animal movement ecology with population and community ecology
Grantee:Milton Cezar Ribeiro
Support type: Regular Research Grants
FAPESP's process: 17/08440-0 - Antropic disturbances and the seed dispersal service by primates: the case of the state of São Paulo
Grantee:Lucas Augusto Pereira
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 17/21816-0 - Spatiotemporal dynamics of hantavirus disease in a fast-changing country
Grantee:Renata de Lara Muylaert
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 14/18800-6 - Patch landscape size effects on functional and phylogenetic diversity thresholds for Atlantic Forest small mammals
Grantee:Ricardo Siqueira Bovendorp
Support type: Scholarships abroad - Research Internship - Post-doctor