Geographic patterns in plant-pollinator mutualistic networks

. Recent reviews of plant–pollinator mutualistic networks showed that gen- eralization is a common pattern in this type of interaction. Here we examine the ecological correlates of generalization patterns in plant–pollinator networks, especially how interaction patterns covar y with latitude, elevat...

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Detalles Bibliográficos
Autores: Olesen, Jens M., Jordano, Pedro
Tipo de recurso: artículo
Fecha de publicación:2002
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/42356
Acceso en línea:http://hdl.handle.net/10261/42356
Access Level:acceso abierto
Palabra clave:food web
geographic variation
Insects
interaction-web connectance
Mutualism
Networks
plant–animal interaction
Pollination
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spelling Geographic patterns in plant-pollinator mutualistic networksOlesen, Jens M.Jordano, PedroJordano, Pedrofood webgeographic variationInsectsinteraction-web connectanceMutualismNetworksplant–animal interactionPollination. Recent reviews of plant–pollinator mutualistic networks showed that gen- eralization is a common pattern in this type of interaction. Here we examine the ecological correlates of generalization patterns in plant–pollinator networks, especially how interaction patterns covar y with latitude, elevation, and insularity. We review the few published anal- yses of whole networks and include unpublished material, analyzing 29 complete plant– pollinator networks that encompass arctic, alpine, temperate, Mediterranean, and subtrop- ical–tropical areas. The number of interactions obser ved (I) was a linear function of network size (M ) the maximum number of interactions: ln I = 0.575 + 0.61 ln M; R2 = 0.946. The connectance (C), the fraction of obser ved interactions relative to the total possible, decreased exponentially with species richness, the sum of animal and plant species in each community (A + P): C = 13.83 exp[—0.003(A + P)]. After controlling for species richness, the residual connectance was significantly lower in highland (>1500 m elevation) than in lowland networks and differed marginally among biogeographic regions, with both alpine and trop- ical networks showing a trend for lower residual connectance. The two Mediterranean networks showed the highest residual connectance. After correcting for variation in network size, plant species were shown to be more generalized at higher latitude and lowland habitats, but showed increased specialization on islands. Oceanic island networks showed an im- poverishment of potential animal pollinators (lower ratio of animal to plant species, A : P, compared to mainland networks) associated with this trend of increased specialization. Plants, but not their flower-visiting animals, supported the often-repeated statements about higher specificity in the tropics than at higher latitudes. The pattern of interaction build- up as diversity increases in pollination networks does not differ appreciably from other mutualisms, such as plant–seed disperser networks or more complex food webs.Peer reviewedEcological Society of America201120112002info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/42356reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.esajournals.org/doi/pdf/10.1890/0012-9658%282002%29083%5B2416%3AGPIPPM%5D2.0.CO%3B2info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/423562026-05-22T06:33:51Z
dc.title.none.fl_str_mv Geographic patterns in plant-pollinator mutualistic networks
title Geographic patterns in plant-pollinator mutualistic networks
spellingShingle Geographic patterns in plant-pollinator mutualistic networks
Olesen, Jens M.
food web
geographic variation
Insects
interaction-web connectance
Mutualism
Networks
plant–animal interaction
Pollination
title_short Geographic patterns in plant-pollinator mutualistic networks
title_full Geographic patterns in plant-pollinator mutualistic networks
title_fullStr Geographic patterns in plant-pollinator mutualistic networks
title_full_unstemmed Geographic patterns in plant-pollinator mutualistic networks
title_sort Geographic patterns in plant-pollinator mutualistic networks
dc.creator.none.fl_str_mv Olesen, Jens M.
Jordano, Pedro
Jordano, Pedro
author Olesen, Jens M.
author_facet Olesen, Jens M.
Jordano, Pedro
author_role author
author2 Jordano, Pedro
author2_role author
dc.subject.none.fl_str_mv food web
geographic variation
Insects
interaction-web connectance
Mutualism
Networks
plant–animal interaction
Pollination
topic food web
geographic variation
Insects
interaction-web connectance
Mutualism
Networks
plant–animal interaction
Pollination
description . Recent reviews of plant–pollinator mutualistic networks showed that gen- eralization is a common pattern in this type of interaction. Here we examine the ecological correlates of generalization patterns in plant–pollinator networks, especially how interaction patterns covar y with latitude, elevation, and insularity. We review the few published anal- yses of whole networks and include unpublished material, analyzing 29 complete plant– pollinator networks that encompass arctic, alpine, temperate, Mediterranean, and subtrop- ical–tropical areas. The number of interactions obser ved (I) was a linear function of network size (M ) the maximum number of interactions: ln I = 0.575 + 0.61 ln M; R2 = 0.946. The connectance (C), the fraction of obser ved interactions relative to the total possible, decreased exponentially with species richness, the sum of animal and plant species in each community (A + P): C = 13.83 exp[—0.003(A + P)]. After controlling for species richness, the residual connectance was significantly lower in highland (>1500 m elevation) than in lowland networks and differed marginally among biogeographic regions, with both alpine and trop- ical networks showing a trend for lower residual connectance. The two Mediterranean networks showed the highest residual connectance. After correcting for variation in network size, plant species were shown to be more generalized at higher latitude and lowland habitats, but showed increased specialization on islands. Oceanic island networks showed an im- poverishment of potential animal pollinators (lower ratio of animal to plant species, A : P, compared to mainland networks) associated with this trend of increased specialization. Plants, but not their flower-visiting animals, supported the often-repeated statements about higher specificity in the tropics than at higher latitudes. The pattern of interaction build- up as diversity increases in pollination networks does not differ appreciably from other mutualisms, such as plant–seed disperser networks or more complex food webs.
publishDate 2002
dc.date.none.fl_str_mv 2002
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/42356
url http://hdl.handle.net/10261/42356
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://www.esajournals.org/doi/pdf/10.1890/0012-9658%282002%29083%5B2416%3AGPIPPM%5D2.0.CO%3B2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Ecological Society of America
publisher.none.fl_str_mv Ecological Society of America
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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