DOI: 10.1111/gcb.12439
论文题名: Microhabitats reduce animal's exposure to climate extremes
作者: Scheffers B.R. ; Edwards D.P. ; Diesmos A. ; Williams S.E. ; Evans T.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 2 起始页码: 495
结束页码: 503
语种: 英语
英文关键词: Amphibian
; Climate change
; Critical thermal maximum
; Ecophysiology
; Refuge
; Reptile
Scopus关键词: amphibian
; climate change
; ecophysiology
; extreme event
; microhabitat
; refuge
; reptile
; Philippines
; Amphibia
; Animalia
; Anura
; Reptilia
; Squamata
; Amphibia
; animal
; Anura
; article
; climate change
; Critical thermal maximum
; ecophysiology
; ecosystem
; heat
; lizard
; microclimate
; Philippines
; physiology
; refuge
; reptile
; amphibian
; climate change
; critical thermal maximum
; ecophysiology
; refuge
; reptile
; Animals
; Anura
; Climate Change
; Ecosystem
; Hot Temperature
; Lizards
; Microclimate
; Philippines
英文摘要: Extreme weather events, such as unusually hot or dry conditions, can cause death by exceeding physiological limits, and so cause loss of population. Survival will depend on whether or not susceptible organisms can find refuges that buffer extreme conditions. Microhabitats offer different microclimates to those found within the wider ecosystem, but do these microhabitats effectively buffer extreme climate events relative to the physiological requirements of the animals that frequent them? We collected temperature data from four common microhabitats (soil, tree holes, epiphytes, and vegetation) located from the ground to canopy in primary rainforests in the Philippines. Ambient temperatures were monitored from outside of each microhabitat and from the upper forest canopy, which represent our macrohabitat controls. We measured the critical thermal maxima (CTmax) of frog and lizard species, which are thermally sensitive and inhabit our microhabitats. Microhabitats reduced mean temperature by 1-2 °C and reduced the duration of extreme temperature exposure by 14-31 times. Microhabitat temperatures were below the CTmax of inhabitant frogs and lizards, whereas macrohabitats consistently contained lethal temperatures. Microhabitat temperatures increased by 0.11-0.66 °C for every 1 °C increase in macrohabitat temperature, and this nonuniformity in temperature change influenced our forecasts of vulnerability for animal communities under climate change. Assuming uniform increases of 6 °C, microhabitats decreased the vulnerability of communities by up to 32-fold, whereas under nonuniform increases of 0.66 to 3.96 °C, microhabitats decreased the vulnerability of communities by up to 108-fold. Microhabitats have extraordinary potential to buffer climate and likely reduce mortality during extreme climate events. These results suggest that predicted changes in distribution due to mortality and habitat shifts that are derived from macroclimatic samples and that assume uniform changes in microclimates relative to macroclimates may be overly pessimistic. Nevertheless, even nonuniform temperature increases within buffered microhabitats would still threaten frogs and lizards. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61991
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, SGP, 117543, Singapore; Centre for Tropical Biodiversity and Climate Change, School of Marine and Tropical Biology, James Cook University, Townsville, QL, 4811, Australia; Centre for Tropical Environmental and Sustainability Science (TESS), School of Marine and Tropical Biology, James Cook University, Cairns, QL, 4878, Australia; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, United Kingdom; Herpetology Section, Zoology Division, National Museum of the Philippines, Padre Burgos Avenue, Ermita, 1000, Philippines
Recommended Citation:
Scheffers B.R.,Edwards D.P.,Diesmos A.,et al. Microhabitats reduce animal's exposure to climate extremes[J]. Global Change Biology,2014-01-01,20(2)