Can individual and social patterns of resource use buffer animal populations against resource decline?
Species in many ecosystems are facing declines of key resources. If we are to understand and predict the effects of resource loss on natural populations, we need to understand whether and how the way animals use resources changes under resource decline. We investigated how the abundance of arboreal...
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| description | Species in many ecosystems are facing declines of key resources. If we are to understand and predict the effects of resource loss on natural populations, we need to understand whether and how the way animals use resources changes under resource decline. We investigated how the abundance of arboreal marsupials varies in response to a critical resource, hollow-bearing trees. Principally, we asked what mechanisms mediate the relationship between resources and abundance? Do animals use a greater or smaller proportion of the remaining resource, and is there a change in cooperative resource use (den sharing), as the availability of hollow trees declines? Analyses of data from 160 sites surveyed from 1997 to 2007 showed that hollow tree availability was positively associated with abundance of the mountain brushtail possum, the agile antechinus and the greater glider. The abundance of Leadbeater's possum was primarily influenced by forest age. Notably, the relationship between abundance and hollow tree availability was significantly less than 1:1 for all species. This was due primarily to a significant increase by all species in the proportional use of hollow-bearing trees where the abundance of this resource was low. The resource-sharing response was weaker and inconsistent among species. Two species, the mountain brushtail possum and the agile antechinus, showed significant but contrasting relationships between the number of animals per occupied tree and hollow tree abundance. The discrepancies between the species can be explained partly by differences in several aspects of the species' biology, including body size, types of hollows used and social behaviour as it relates to hollow use. Our results show that individual and social aspects of resource use are not always static in response to resource availability and support the need to account for dynamic resource use patterns in predictive models of animal distribution and abundance. |
| doi_str_mv | 10.1371/journal.pone.0053672 |
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Notably, the relationship between abundance and hollow tree availability was significantly less than 1:1 for all species. This was due primarily to a significant increase by all species in the proportional use of hollow-bearing trees where the abundance of this resource was low. The resource-sharing response was weaker and inconsistent among species. Two species, the mountain brushtail possum and the agile antechinus, showed significant but contrasting relationships between the number of animals per occupied tree and hollow tree abundance. The discrepancies between the species can be explained partly by differences in several aspects of the species' biology, including body size, types of hollows used and social behaviour as it relates to hollow use. 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This is an open-access article distributed under the terms of the Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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If we are to understand and predict the effects of resource loss on natural populations, we need to understand whether and how the way animals use resources changes under resource decline. We investigated how the abundance of arboreal marsupials varies in response to a critical resource, hollow-bearing trees. Principally, we asked what mechanisms mediate the relationship between resources and abundance? Do animals use a greater or smaller proportion of the remaining resource, and is there a change in cooperative resource use (den sharing), as the availability of hollow trees declines? Analyses of data from 160 sites surveyed from 1997 to 2007 showed that hollow tree availability was positively associated with abundance of the mountain brushtail possum, the agile antechinus and the greater glider. The abundance of Leadbeater's possum was primarily influenced by forest age. 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Our results show that individual and social aspects of resource use are not always static in response to resource availability and support the need to account for dynamic resource use patterns in predictive models of animal distribution and abundance.</description><subject>Abundance</subject><subject>Analysis</subject><subject>Animal behavior</subject><subject>Animal models</subject><subject>Animal populations</subject><subject>Animals</subject><subject>Availability</subject><subject>Behavior, Animal</subject><subject>Biology</subject><subject>Body size</subject><subject>Conservation biology</subject><subject>Conservation of Natural Resources</subject><subject>Cooperation</subject><subject>Data processing</subject><subject>Ecology</subject><subject>Ecosystem</subject><subject>Ecosystems</subject><subject>Environmental changes</subject><subject>Environmental protection</subject><subject>Evolution</subject><subject>Forests</subject><subject>Gymnobelideus 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David</au><au>Blyton, Michaela D J</au><au>Boyce, Mark S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Can individual and social patterns of resource use buffer animal populations against resource decline?</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2013-01-08</date><risdate>2013</risdate><volume>8</volume><issue>1</issue><spage>e53672</spage><epage>e53672</epage><pages>e53672-e53672</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Species in many ecosystems are facing declines of key resources. If we are to understand and predict the effects of resource loss on natural populations, we need to understand whether and how the way animals use resources changes under resource decline. We investigated how the abundance of arboreal marsupials varies in response to a critical resource, hollow-bearing trees. Principally, we asked what mechanisms mediate the relationship between resources and abundance? Do animals use a greater or smaller proportion of the remaining resource, and is there a change in cooperative resource use (den sharing), as the availability of hollow trees declines? Analyses of data from 160 sites surveyed from 1997 to 2007 showed that hollow tree availability was positively associated with abundance of the mountain brushtail possum, the agile antechinus and the greater glider. The abundance of Leadbeater's possum was primarily influenced by forest age. Notably, the relationship between abundance and hollow tree availability was significantly less than 1:1 for all species. This was due primarily to a significant increase by all species in the proportional use of hollow-bearing trees where the abundance of this resource was low. The resource-sharing response was weaker and inconsistent among species. Two species, the mountain brushtail possum and the agile antechinus, showed significant but contrasting relationships between the number of animals per occupied tree and hollow tree abundance. The discrepancies between the species can be explained partly by differences in several aspects of the species' biology, including body size, types of hollows used and social behaviour as it relates to hollow use. Our results show that individual and social aspects of resource use are not always static in response to resource availability and support the need to account for dynamic resource use patterns in predictive models of animal distribution and abundance.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>23320100</pmid><doi>10.1371/journal.pone.0053672</doi><tpages>e53672</tpages><oa>free_for_read</oa></addata></record> |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry; Public Library of Science (PLoS) Journals Open Acc |
| subjects | Abundance Analysis Animal behavior Animal models Animal populations Animals Availability Behavior, Animal Biology Body size Conservation biology Conservation of Natural Resources Cooperation Data processing Ecology Ecosystem Ecosystems Environmental changes Environmental protection Evolution Forests Gymnobelideus leadbeateri Lead Marsupialia Marsupials Models, Biological Natural populations Old-growth forests Population Dynamics Populations Prediction models Resource availability Social aspects Social Behavior Social factors Society Species Statistics Trees Trichosurus Trichosurus cunninghami Victoria |
| title | Can individual and social patterns of resource use buffer animal populations against resource decline? |
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