Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space
Mutualistic interaction networks have been shown to be structurally conserved over space and time while pairwise interactions show high variability. In such networks, modularity is the division of species into compartments, or modules, where species within modules share more interactions with each o...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Wiley
2019
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| Online Access: | https://esajournals.onlinelibrary.wiley.com/doi/10.1890/15-0830.1 http://hdl.handle.net/20.500.12123/4723 https://doi.org/10.1890/15-0830.1 |
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| author | Carstensen, Daniel W. Sabatino, Cristina Malena Morellato, Leonor Patricia C. |
| author_browse | Carstensen, Daniel W. Morellato, Leonor Patricia C. Sabatino, Cristina Malena |
| author_facet | Carstensen, Daniel W. Sabatino, Cristina Malena Morellato, Leonor Patricia C. |
| author_sort | Carstensen, Daniel W. |
| collection | INTA Digital |
| description | Mutualistic interaction networks have been shown to be structurally conserved over space and time while pairwise interactions show high variability. In such networks, modularity is the division of species into compartments, or modules, where species within modules share more interactions with each other than they do with species from other modules. Such a modular structure is common in mutualistic networks and several evolutionary and ecological mechanisms have been proposed as underlying drivers. One prominent explanation is the existence of pollination syndromes where flowers tend to attract certain pollinators as determined by a set of traits. We investigate the modularity of seven community level plant‐pollinator networks sampled in rupestrian grasslands, or campos rupestres, in SE Brazil. Defining pollination systems as corresponding groups of flower syndromes and pollinator functional groups, we test the two hypotheses that (1) interacting species from the same pollination system are more often assigned to the same module than interacting species from different pollination systems and; that (2) interactions between species from the same pollination system are more consistent across space than interactions between species from different pollination systems. Specifically we ask (1) whether networks are consistently modular across space; (2) whether interactions among species of the same pollination system occur more often inside modules, compared to interactions among species of different pollination systems, and finally; (3) whether the spatial variation in interaction identity, i.e., spatial interaction rewiring, is affected by trait complementarity among species as indicated by pollination systems. We confirm that networks are consistently modular across space and that interactions within pollination systems principally occur inside modules. Despite a strong tendency, we did not find a significant effect of pollination systems on the spatial consistency of pairwise interactions. These results indicate that the spatial rewiring of interactions could be constrained by pollination systems, resulting in conserved network structures in spite of high variation in pairwise interactions. Our findings suggest a relevant role of pollination systems in structuring plant‐pollinator networks and we argue that structural patterns at the sub‐network level can help us to fully understand how and why interactions vary across space and time. |
| format | info:ar-repo/semantics/artículo |
| id | INTA4723 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA47232019-03-25T14:44:47Z Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space Carstensen, Daniel W. Sabatino, Cristina Malena Morellato, Leonor Patricia C. Polinización Praderas Pollination Grasslands Campos Rupestres Mutualistic interaction networks have been shown to be structurally conserved over space and time while pairwise interactions show high variability. In such networks, modularity is the division of species into compartments, or modules, where species within modules share more interactions with each other than they do with species from other modules. Such a modular structure is common in mutualistic networks and several evolutionary and ecological mechanisms have been proposed as underlying drivers. One prominent explanation is the existence of pollination syndromes where flowers tend to attract certain pollinators as determined by a set of traits. We investigate the modularity of seven community level plant‐pollinator networks sampled in rupestrian grasslands, or campos rupestres, in SE Brazil. Defining pollination systems as corresponding groups of flower syndromes and pollinator functional groups, we test the two hypotheses that (1) interacting species from the same pollination system are more often assigned to the same module than interacting species from different pollination systems and; that (2) interactions between species from the same pollination system are more consistent across space than interactions between species from different pollination systems. Specifically we ask (1) whether networks are consistently modular across space; (2) whether interactions among species of the same pollination system occur more often inside modules, compared to interactions among species of different pollination systems, and finally; (3) whether the spatial variation in interaction identity, i.e., spatial interaction rewiring, is affected by trait complementarity among species as indicated by pollination systems. We confirm that networks are consistently modular across space and that interactions within pollination systems principally occur inside modules. Despite a strong tendency, we did not find a significant effect of pollination systems on the spatial consistency of pairwise interactions. These results indicate that the spatial rewiring of interactions could be constrained by pollination systems, resulting in conserved network structures in spite of high variation in pairwise interactions. Our findings suggest a relevant role of pollination systems in structuring plant‐pollinator networks and we argue that structural patterns at the sub‐network level can help us to fully understand how and why interactions vary across space and time. EEA Balcarce Fil: Carstensen, Daniel W.. Universidade Estadual Paulista Julio de Mesquita Filho. Instituto de Biociências; Brasil. Universidad de Copenhagen. Natural History Museum of Denmark. Center for Macroecology, Evolution and Climate; Dinamarca Fil: Sabatino, Malena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Fil: Morellato, Leonor Patricia C. Universidade Estadual Paulista Julio de Mesquita Filho. Instituto de Biociências; Brasil. 2019-03-25T14:43:27Z 2019-03-25T14:43:27Z 2016-05 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://esajournals.onlinelibrary.wiley.com/doi/10.1890/15-0830.1 http://hdl.handle.net/20.500.12123/4723 0012-9658 1939-9170 https://doi.org/10.1890/15-0830.1 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Ecology 97 (5) : 1298-1306 (May 2016) |
| spellingShingle | Polinización Praderas Pollination Grasslands Campos Rupestres Carstensen, Daniel W. Sabatino, Cristina Malena Morellato, Leonor Patricia C. Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title | Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title_full | Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title_fullStr | Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title_full_unstemmed | Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title_short | Modularity, pollination systems, and interaction turnover in plant‐pollinator networks across space |
| title_sort | modularity pollination systems and interaction turnover in plant pollinator networks across space |
| topic | Polinización Praderas Pollination Grasslands Campos Rupestres |
| url | https://esajournals.onlinelibrary.wiley.com/doi/10.1890/15-0830.1 http://hdl.handle.net/20.500.12123/4723 https://doi.org/10.1890/15-0830.1 |
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