Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web
Body size is a major factor constraining the trophic structure and functioning of ecological communities. Food webs are known to respond to changes in basal resource abundance, and climate change can initiate compounding bottom-up effects on food-web structure through altered resource availability a...
| Autores principales: | , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Royal Society
2012
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/95725 |
| _version_ | 1855537754882965504 |
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| author | Sassi, Claudio de Staniczenko, P.P.A Tylianakis, Jason M. |
| author_browse | Sassi, Claudio de Staniczenko, P.P.A Tylianakis, Jason M. |
| author_facet | Sassi, Claudio de Staniczenko, P.P.A Tylianakis, Jason M. |
| author_sort | Sassi, Claudio de |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Body size is a major factor constraining the trophic structure and functioning of ecological communities. Food webs are known to respond to changes in basal resource abundance, and climate change can initiate compounding bottom-up effects on food-web structure through altered resource availability and quality. However, the effects of climate and co-occurring global changes, such as nitrogen deposition, on the density and size relationships between resources and consumers are unknown, particularly in host–parasitoid food webs, where size structuring is less apparent. We use a Bayesian modelling approach to explore the role of consumer and resource density and body size on host–parasitoid food webs assembled from a field experiment with factorial warming and nitrogen treatments. We show that the treatments increased resource (host) availability and quality (size), leading to measureable changes in parasitoid feeding behaviour. Parasitoids interacted less evenly within their host range and increasingly focused on abundant and high-quality (i.e. larger) hosts. In summary, we present evidence that climate-mediated bottom-up effects can significantly alter food-web structure through both density- and trait-mediated effects. |
| format | Journal Article |
| id | CGSpace95725 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2012 |
| publishDateRange | 2012 |
| publishDateSort | 2012 |
| publisher | Royal Society |
| publisherStr | Royal Society |
| record_format | dspace |
| spelling | CGSpace957252025-06-17T08:24:13Z Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web Sassi, Claudio de Staniczenko, P.P.A Tylianakis, Jason M. ecology climate change food security Body size is a major factor constraining the trophic structure and functioning of ecological communities. Food webs are known to respond to changes in basal resource abundance, and climate change can initiate compounding bottom-up effects on food-web structure through altered resource availability and quality. However, the effects of climate and co-occurring global changes, such as nitrogen deposition, on the density and size relationships between resources and consumers are unknown, particularly in host–parasitoid food webs, where size structuring is less apparent. We use a Bayesian modelling approach to explore the role of consumer and resource density and body size on host–parasitoid food webs assembled from a field experiment with factorial warming and nitrogen treatments. We show that the treatments increased resource (host) availability and quality (size), leading to measureable changes in parasitoid feeding behaviour. Parasitoids interacted less evenly within their host range and increasingly focused on abundant and high-quality (i.e. larger) hosts. In summary, we present evidence that climate-mediated bottom-up effects can significantly alter food-web structure through both density- and trait-mediated effects. 2012-11-05 2018-07-03T11:03:29Z 2018-07-03T11:03:29Z Journal Article https://hdl.handle.net/10568/95725 en Open Access Royal Society de Sassi, C., Staniczenko, P.P.A., Tylianakis, J.M. . 2012. Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web Philosophical Transactions of the Royal Society, B., 367 (1605) https://doi.org/10.1098/rstb.2012.0233 |
| spellingShingle | ecology climate change food security Sassi, Claudio de Staniczenko, P.P.A Tylianakis, Jason M. Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title | Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title_full | Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title_fullStr | Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title_full_unstemmed | Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title_short | Warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| title_sort | warming and nitrogen affect size structuring and density dependence in a host parasitoid food web |
| topic | ecology climate change food security |
| url | https://hdl.handle.net/10568/95725 |
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