Field exclusion of large soil predators impacts lower trophic levels and decreases leaf ‐ litter decomposition in dry forests
1. Shifts in densities of apex predators may indirectly affect fundamental ecosystem processes, such as decomposition, by altering patterns of cascading effects propagating through lower trophic levels. These top–down effects may interact with anthropogenic impacts, such as climate change, in largel...
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2020melguizoruiz.pdf LINK AL EDITOR |
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| 245 | 1 | 0 | |a Field exclusion of large soil predators impacts lower trophic levels and decreases leaf ‐ litter decomposition in dry forests |
| 520 | |a 1. Shifts in densities of apex predators may indirectly affect fundamental ecosystem processes, such as decomposition, by altering patterns of cascading effects propagating through lower trophic levels. These top–down effects may interact with anthropogenic impacts, such as climate change, in largely unknown ways. 2. We investigated how changes in densities of large predatory arthropods in forest leaf‐litter communities altered lower trophic levels and litter decomposition. We conducted our experiment in soil communities that had experienced different levels of long term average precipitation. We hypothesized that altering abundances of apex predators would have stronger effects on soil communities inhabiting dry forests, due to lower secondary productivity and greater resource overexploitation by lower trophic levels compared to wet forests. 3. We experimentally manipulated abundances of the largest arthropod predators (apex predators) in field mesocosms replicated in the leaf‐litter community of Iberian beech forests that differed in long‐term mean annual precipitation by 25% (three dry forests with MAP smaller than 1,250 mm and four wet forests with MAP greater than 1,400 mm). After one year, we assessed abundances of soil fauna in lower trophic levels and indirect impacts on leaf‐litter decomposition using litter of understorey hazel, Corylus avellana. 4. Reducing densities of large predators had a consistently negative effect on final abundances of the different trophic groups and several taxa within each group. Moreover, large predatory arthropods strongly impacted litter decomposition, and their effect interacted with the long‐term annual rainfall experienced by the soil community. In the dry forests, a 50% reduction in the densities of apex predators was associated with a 50% reduction in decomposition. In wet forests, the same reduction in densities of apex soil predators did not alter the rate of litter decomposition. 5. Our results suggest that predators may facilitate lower trophic levels by indirectly reducing competition and resource overexploitation, cascading effects that may be more pronounced in drier forests where conditions have selected for greater competitive ability and more rapid resource utilization. These findings thus provide insights into the functioning of soil invertebrate communities and their role in decomposition, as well as potential consequences of soil community responses to climate change. | ||
| 653 | |a APEX PREDATORS | ||
| 653 | |a BODY SIZE | ||
| 653 | |a CLIMATE CHANGE | ||
| 653 | |a FIELD MESOCOSMS | ||
| 653 | |a LEAF‐LITTER DECOMPOSITION | ||
| 653 | |a PRECIPITATION | ||
| 653 | |a SOIL FOOD WEBS | ||
| 653 | |a TOP–DOWN CONTROL | ||
| 700 | 1 | |a Melguizo Ruiz, Nereida |u Consejo Superior de Investigaciones Científicas (CSIC). Estación Experimental de Zonas Áridas. Functional and Evolutionary Ecology. Almería, Spain. |u Oviedo University. Unit of Biodiversity (UO/CSIC/PA). Mieres, Spain. |u CIBIO/InBio Research Center in Biodiversity and Genetic Resources.Evora, Portugal. |9 70996 | |
| 700 | 1 | |a Jiménez Navarro, Gerardo |u Consejo Superior de Investigaciones Científicas (CSIC). Estación Experimental de Zonas Áridas. Functional and Evolutionary Ecology. Almería, Spain. |u CIBIO/InBio Research Center in Biodiversity and Genetic Resources. Évora, Portugal. |9 71007 | |
| 700 | 1 | |a De Mas, Eva |u Consejo Superior de Investigaciones Científicas (CSIC). Estación Experimental de Zonas Áridas. Functional and Evolutionary Ecology. Almería, Spain. |9 71008 | |
| 700 | 1 | |a Pato, Joaquina |u Oviedo University. Unit of Biodiversity (UO/CSIC/PA). Mieres, Spain. |9 71012 | |
| 700 | 1 | |a Scheu, Stefan |u University of Göttingen. Animal J.F. Blumenbach Institute of Zoology and Anthropology. Göttingen, Germany. |u University of Göttingen. Centre of Biodiversity and Sustainable Land Use. Göttingen, Germany. |9 41187 | |
| 700 | 1 | |9 48259 |a Austin, Amy Theresa |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
| 700 | 1 | |a Wise, David H. |u University of Illinois at Chicago. Department of Biological Sciences. Chicago, Illinois, USA. |9 71019 | |
| 700 | 1 | |9 71584 |a Moya Laraño, Jordi |u Consejo Superior de Investigaciones Científicas (CSIC). Estación Experimental de Zonas Áridas. Functional and Evolutionary Ecology. Almería, Spain. | |
| 773 | 0 | |t Journal of animal ecology |w (AR-BaUFA)SECS000255 |g vol.89, no.2 (2020), p.334-346, grafs., il. | |
| 856 | |f 2020melguizoruiz |i en reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2020melguizoruiz.pdf |x ARTI202003 | ||
| 856 | |z LINK AL EDITOR |u https://www.wiley.com/ | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||