Indirect effects of prey swamping: Differential seed predation during a bamboo masting event
Resource pulses often involve extraordinary increases in prey availability that "swamp" consumers and reverberate through indirect interactions affecting other community members. We developed a model that predicts predator-mediated indirect effects induced by an epidemic prey on co-occurri...
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todo:paper_00129658_v88_n10_p2541_Kitzberger2023-10-03T14:10:38Z Indirect effects of prey swamping: Differential seed predation during a bamboo masting event Kitzberger, T. Chaneton, E.J. Caccia, F. Apparent competition Apparent mutualism Chusquea culeou Diet selection Indirect interactions Nothofagus spp. Patagonia Predator functional response Prey quality Resource pulse Transient dynamics bamboo coniferous tree deciduous tree ecological modeling flowering interspecific competition litter masting predator-prey interaction prey availability recruitment (population dynamics) seed predation swamp Patagonia South America Austrocedrus chilensis Chusquea culeou Nothofagus Nothofagus alpina Nothofagus dombeyi Nothofagus obliqua animal article catering service ecosystem food chain food preference growth, development and aging physiology plant seed population dynamics predation Sasa season Animals Ecosystem Food Chain Food Preferences Food Supply Population Dynamics Predatory Behavior Sasa Seasons Seeds Resource pulses often involve extraordinary increases in prey availability that "swamp" consumers and reverberate through indirect interactions affecting other community members. We developed a model that predicts predator-mediated indirect effects induced by an epidemic prey on co-occurring prey types differing in relative profitability/preference and validated our model by examining current-season and delayed effects of a bamboo mass seeding event on seed survival of canopy tree species in mixed Patagonian forests. The model shows that predator foraging behavior, prey profitability, and the scale of prey swamping influence the character and strength of short-term indirect effects on various alternative prey. When in large prey-swamped patches, nonselective predators decrease predation on all prey types. Selective predators, instead, only benefit prey of similar quality to the swamping species, while very low or high preference prey remain unaffected. Negative indirect effects (apparent competition) may override such positive effects (apparent mutualism), especially for highly preferred prey, when prey-swamped patches are small enough to allow predator aggregation and/or predators show a reproductive numerical response to elevated food supply. Seed predation patterns during bamboo (Chusquea culeou) masting were consistent with predicted short-term indirect effects mediated by a selective predator foraging in large prey-swamped patches. Bamboo seeds and similarly-sized Austrocedrus chilensis (ciprés) and Nothofagus obliqua (roble) seeds suffered lower predation in bamboo flowered than nonflowered patches. Predation rates on the small-seeded Nothofagus dombeyi (coihue) and the large-seeded Nothofagus alpina (raulí) were independent of bamboo flowering. Indirect positive effects were transient; three months after bamboo seeding, granivores preyed heavily upon all seed types, irrespective of patch flowering condition. Moreover, one year after bamboo seeding, predation rates on the most preferred seed (raulí) was higher in flowered than in nonflowered patches. Despite rapid predator numerical responses, short-term positive effects can still influence community recruitment dynamics because surviving seeds may find refuge beneath the litter produced by bamboo dieback. Together, our theoretical analysis and experiments indicate that indirect effects experienced by alternative prey during and after prey-swamping episodes need not be universal but can change across a prey quality spectrum, and they critically depend on predator-foraging rules and the spatial scale of swamping. © 2007 by the Ecological Society of America. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00129658_v88_n10_p2541_Kitzberger |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Apparent competition Apparent mutualism Chusquea culeou Diet selection Indirect interactions Nothofagus spp. Patagonia Predator functional response Prey quality Resource pulse Transient dynamics bamboo coniferous tree deciduous tree ecological modeling flowering interspecific competition litter masting predator-prey interaction prey availability recruitment (population dynamics) seed predation swamp Patagonia South America Austrocedrus chilensis Chusquea culeou Nothofagus Nothofagus alpina Nothofagus dombeyi Nothofagus obliqua animal article catering service ecosystem food chain food preference growth, development and aging physiology plant seed population dynamics predation Sasa season Animals Ecosystem Food Chain Food Preferences Food Supply Population Dynamics Predatory Behavior Sasa Seasons Seeds |
| spellingShingle |
Apparent competition Apparent mutualism Chusquea culeou Diet selection Indirect interactions Nothofagus spp. Patagonia Predator functional response Prey quality Resource pulse Transient dynamics bamboo coniferous tree deciduous tree ecological modeling flowering interspecific competition litter masting predator-prey interaction prey availability recruitment (population dynamics) seed predation swamp Patagonia South America Austrocedrus chilensis Chusquea culeou Nothofagus Nothofagus alpina Nothofagus dombeyi Nothofagus obliqua animal article catering service ecosystem food chain food preference growth, development and aging physiology plant seed population dynamics predation Sasa season Animals Ecosystem Food Chain Food Preferences Food Supply Population Dynamics Predatory Behavior Sasa Seasons Seeds Kitzberger, T. Chaneton, E.J. Caccia, F. Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| topic_facet |
Apparent competition Apparent mutualism Chusquea culeou Diet selection Indirect interactions Nothofagus spp. Patagonia Predator functional response Prey quality Resource pulse Transient dynamics bamboo coniferous tree deciduous tree ecological modeling flowering interspecific competition litter masting predator-prey interaction prey availability recruitment (population dynamics) seed predation swamp Patagonia South America Austrocedrus chilensis Chusquea culeou Nothofagus Nothofagus alpina Nothofagus dombeyi Nothofagus obliqua animal article catering service ecosystem food chain food preference growth, development and aging physiology plant seed population dynamics predation Sasa season Animals Ecosystem Food Chain Food Preferences Food Supply Population Dynamics Predatory Behavior Sasa Seasons Seeds |
| description |
Resource pulses often involve extraordinary increases in prey availability that "swamp" consumers and reverberate through indirect interactions affecting other community members. We developed a model that predicts predator-mediated indirect effects induced by an epidemic prey on co-occurring prey types differing in relative profitability/preference and validated our model by examining current-season and delayed effects of a bamboo mass seeding event on seed survival of canopy tree species in mixed Patagonian forests. The model shows that predator foraging behavior, prey profitability, and the scale of prey swamping influence the character and strength of short-term indirect effects on various alternative prey. When in large prey-swamped patches, nonselective predators decrease predation on all prey types. Selective predators, instead, only benefit prey of similar quality to the swamping species, while very low or high preference prey remain unaffected. Negative indirect effects (apparent competition) may override such positive effects (apparent mutualism), especially for highly preferred prey, when prey-swamped patches are small enough to allow predator aggregation and/or predators show a reproductive numerical response to elevated food supply. Seed predation patterns during bamboo (Chusquea culeou) masting were consistent with predicted short-term indirect effects mediated by a selective predator foraging in large prey-swamped patches. Bamboo seeds and similarly-sized Austrocedrus chilensis (ciprés) and Nothofagus obliqua (roble) seeds suffered lower predation in bamboo flowered than nonflowered patches. Predation rates on the small-seeded Nothofagus dombeyi (coihue) and the large-seeded Nothofagus alpina (raulí) were independent of bamboo flowering. Indirect positive effects were transient; three months after bamboo seeding, granivores preyed heavily upon all seed types, irrespective of patch flowering condition. Moreover, one year after bamboo seeding, predation rates on the most preferred seed (raulí) was higher in flowered than in nonflowered patches. Despite rapid predator numerical responses, short-term positive effects can still influence community recruitment dynamics because surviving seeds may find refuge beneath the litter produced by bamboo dieback. Together, our theoretical analysis and experiments indicate that indirect effects experienced by alternative prey during and after prey-swamping episodes need not be universal but can change across a prey quality spectrum, and they critically depend on predator-foraging rules and the spatial scale of swamping. © 2007 by the Ecological Society of America. |
| format |
JOUR |
| author |
Kitzberger, T. Chaneton, E.J. Caccia, F. |
| author_facet |
Kitzberger, T. Chaneton, E.J. Caccia, F. |
| author_sort |
Kitzberger, T. |
| title |
Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| title_short |
Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| title_full |
Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| title_fullStr |
Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| title_full_unstemmed |
Indirect effects of prey swamping: Differential seed predation during a bamboo masting event |
| title_sort |
indirect effects of prey swamping: differential seed predation during a bamboo masting event |
| url |
http://hdl.handle.net/20.500.12110/paper_00129658_v88_n10_p2541_Kitzberger |
| work_keys_str_mv |
AT kitzbergert indirecteffectsofpreyswampingdifferentialseedpredationduringabamboomastingevent AT chanetonej indirecteffectsofpreyswampingdifferentialseedpredationduringabamboomastingevent AT cacciaf indirecteffectsofpreyswampingdifferentialseedpredationduringabamboomastingevent |
| _version_ |
1782029111112237056 |