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Article: Localised climate change defines ant communities in human‐modified tropical landscapes

TitleLocalised climate change defines ant communities in human‐modified tropical landscapes
Authors
Keywordsclimate change
fragmentation
insects
land-use change
logging
Issue Date2021
PublisherWiley-Blackwell Publishing Ltd. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2435
Citation
Functional Ecology, 2021, v. 35 n. 5, p. 1094-1108 How to Cite?
AbstractLogging and habitat conversion create hotter microclimates in tropical forest landscapes, representing a powerful form of localised anthropogenic climate change. It is widely believed that these emergent conditions are responsible for driving changes in communities of organisms found in modified tropical forests, although the empirical evidence base for this is lacking. Here we investigated how interactions between the physiological traits of genera and the environmental temperatures they experience lead to functional and compositional changes in communities of ants, a key organism in tropical forest ecosystems. We found that the abundance and activity of ant genera along a gradient of forest disturbance in Sabah, Malaysian Borneo, was defined by an interaction between their thermal tolerance (CTmax) and environmental temperature. In more disturbed, warmer habitats, genera with high CTmax had increased relative abundance and functional activity, and those with low CTmax had decreased relative abundance and functional activity. This interaction determined abundance changes between primary and logged forest that differed in daily maximum temperature by a modest 1.1 degrees C, and strengthened as the change in microclimate increased with disturbance. Between habitats that differed by 5.6 degrees C (primary forest to oil palm) and 4.5 degrees C (logged forest to oil palm), a 1 degrees C difference in CTmax among genera led to a 23% and 16% change in relative abundance, and a 22% and 17% difference in functional activity. CTmax was negatively correlated with body size and trophic position, with ants becoming significantly smaller and less predatory as microclimate temperatures increased. Our results provide evidence to support the widely held, but never directly tested, assumption that physiological tolerances underpin the influence of disturbance-induced microclimate change on the abundance and function of invertebrates in tropical landscapes. A free Plain Language Summary can be found within the Supporting Information of this article.
DescriptionHybrid open access
Persistent Identifierhttp://hdl.handle.net/10722/295540
ISSN
2020 Impact Factor: 5.608
2020 SCImago Journal Rankings: 2.272
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorBoyle, MJW-
dc.contributor.authorBishop, TR-
dc.contributor.authorLuke, SH-
dc.contributor.authorvan Breugel, M-
dc.contributor.authorEvans, TA-
dc.contributor.authorPfeifer, M-
dc.contributor.authorFayle, TM-
dc.contributor.authorHardwick, SR-
dc.contributor.authorLane-Shaw, Rachel Iso-
dc.contributor.authorYusah, KM-
dc.contributor.authorAshford, ICR-
dc.contributor.authorAshford, OS-
dc.contributor.authorGarnett, E-
dc.contributor.authorTurner, EC-
dc.contributor.authorWilkinson, CL-
dc.contributor.authorChung, AYC-
dc.contributor.authorEwers, RM-
dc.date.accessioned2021-01-25T11:16:19Z-
dc.date.available2021-01-25T11:16:19Z-
dc.date.issued2021-
dc.identifier.citationFunctional Ecology, 2021, v. 35 n. 5, p. 1094-1108-
dc.identifier.issn0269-8463-
dc.identifier.urihttp://hdl.handle.net/10722/295540-
dc.descriptionHybrid open access-
dc.description.abstractLogging and habitat conversion create hotter microclimates in tropical forest landscapes, representing a powerful form of localised anthropogenic climate change. It is widely believed that these emergent conditions are responsible for driving changes in communities of organisms found in modified tropical forests, although the empirical evidence base for this is lacking. Here we investigated how interactions between the physiological traits of genera and the environmental temperatures they experience lead to functional and compositional changes in communities of ants, a key organism in tropical forest ecosystems. We found that the abundance and activity of ant genera along a gradient of forest disturbance in Sabah, Malaysian Borneo, was defined by an interaction between their thermal tolerance (CTmax) and environmental temperature. In more disturbed, warmer habitats, genera with high CTmax had increased relative abundance and functional activity, and those with low CTmax had decreased relative abundance and functional activity. This interaction determined abundance changes between primary and logged forest that differed in daily maximum temperature by a modest 1.1 degrees C, and strengthened as the change in microclimate increased with disturbance. Between habitats that differed by 5.6 degrees C (primary forest to oil palm) and 4.5 degrees C (logged forest to oil palm), a 1 degrees C difference in CTmax among genera led to a 23% and 16% change in relative abundance, and a 22% and 17% difference in functional activity. CTmax was negatively correlated with body size and trophic position, with ants becoming significantly smaller and less predatory as microclimate temperatures increased. Our results provide evidence to support the widely held, but never directly tested, assumption that physiological tolerances underpin the influence of disturbance-induced microclimate change on the abundance and function of invertebrates in tropical landscapes. A free Plain Language Summary can be found within the Supporting Information of this article.-
dc.languageeng-
dc.publisherWiley-Blackwell Publishing Ltd. The Journal's web site is located at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1365-2435-
dc.relation.ispartofFunctional Ecology-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectclimate change-
dc.subjectfragmentation-
dc.subjectinsects-
dc.subjectland-use change-
dc.subjectlogging-
dc.titleLocalised climate change defines ant communities in human‐modified tropical landscapes-
dc.typeArticle-
dc.identifier.emailBoyle, MJW: mjwboyle@HKUCC-COM.hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1111/1365-2435.13737-
dc.identifier.hkuros320975-
dc.identifier.volume35-
dc.identifier.issue5-
dc.identifier.spage1094-
dc.identifier.epage1108-
dc.identifier.isiWOS:000606532600001-
dc.publisher.placeUnited Kingdom-

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