Arid
DOI10.1002/ecs2.2033
Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard
Kirchhof, Sebastian1,2; Hetem, Robyn S.3,4; Lease, Hilary M.3,5; Miles, Donald B.6; Mitchell, Duncan3,7; Mueller, Johannes1,2; Roedel, Mark-Oliver1,2; Sinervo, Barry8,9; Wassenaar, Theo10; Murray, Ian W.3,11
通讯作者Kirchhof, Sebastian
来源期刊ECOSPHERE
ISSN2150-8925
出版年2017
卷号8期号:12
英文摘要

Knowledge of the thermal ecology of a species can improve model predictions for temperature-induced population collapse, which in light of climate change is increasingly important for species with limited distributions. Here, we use a multi-faceted approach to quantify and integrate the thermal ecology, properties of the thermal habitat, and past and present distribution of the diurnal, xeric-adapted, and active-foraging Namibian lizard Pedioplanis husabensis (Sauria: Lacertidae) to model its local extinction risk under future climate change scenarios. We asked whether climatic conditions in various regions of its range are already so extreme that local extirpations of P. husabensis have already occurred, or whether this micro-endemic species is adapted to these extreme conditions and uses behavior to mitigate the environmental challenges. To address this, we collected thermoregulation and climate data at a micro-scale level and combined it with micro-and macroclimate data across the species’ range to model extinction risk. We found that P. husabensis inhabits a thermally harsh environment, but also has high thermal preference. In cooler parts of its range, individuals are capable of leaving thermally favorable conditions-based on the species’ thermal preference-unused during the day, probably to maintain low metabolic rates. Furthermore, during the summer, we observed that individuals regulate at body temperatures below the species’ high thermal preference to avoid body temperatures approaching the critical thermal maximum. We find that populations of this species are currently persisting even at the hottest localities within the species’ geographic distribution. We found no evidence of range shifts since the 1960s despite a documented increase in air temperatures. Nevertheless, P. husabensis only has a small safety margin between the upper limit of its thermal preference and the critical thermal maximum and might undergo range reductions in the near future under even the most moderate climate change scenarios.


英文关键词climate change cost-benefit model desert ectotherm Lacertidae modeling Namib Desert reptile thermoregulation
类型Article
语种英语
国家Germany ; South Africa ; USA ; Australia ; Namibia
收录类别SCI-E
WOS记录号WOS:000423423200010
WOS关键词STANDARD OPERATIVE TEMPERATURE ; LOCAL EXTINCTION RISK ; RELATIVE IMPORTANCE ; BODY-TEMPERATURE ; NICHE SEPARATION ; HORNED LIZARDS ; FORAGING MODE ; ECTOTHERMS ; ECOLOGY ; FIELD
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
来源机构University of Arizona ; University of Western Australia
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198554
作者单位1.Leibniz Inst Evolut & Biodivers Sci, Museum Nat Kunde, Invalidenstr 43, D-10115 Berlin, Germany;
2.Berlin Brandenburg Inst Adv Biodivers Res BBIB, Altensteinstr 34, D-14195 Berlin, Germany;
3.Univ Witwatersrand, Fac Hlth Sci, Sch Physiol, Brain Funct Res Grp, 7 York Rd, ZA-2193 Johannesburg, Gauteng, South Africa;
4.Univ Witwatersrand, Fac Sci, Sch Anim Plant & Environm Sci, 1 Jan Smuts Ave, ZA-2000 Johannesburg, Gauteng, South Africa;
5.Univ Arizona, Sch Physiol, Tucson, AZ 85721 USA;
6.Ohio Univ, Dept Biol Sci, Athens, OH 45701 USA;
7.Univ Western Australia, Sch Human Sci, 35 Stirling Highway, Perth, WA 6009, Australia;
8.Univ Calif Santa Cruz, Dept Ecol & Evolutionary Biol, 130 McAllister Way,Coastal Biol Bldg, Santa Cruz, CA 95064 USA;
9.Univ Calif Santa Cruz, Inst Study Ecol & Evolutionary Climate Impacts, 130 McAllister Way,Coastal Biol Bldg, Santa Cruz, CA 95064 USA;
10.Gobabeb Res & Training Ctr, POB 953, Walvis Bay, Namibia;
11.Pima Cty Off Sustainabil & Conservat, Tucson, AZ 85701 USA
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GB/T 7714
Kirchhof, Sebastian,Hetem, Robyn S.,Lease, Hilary M.,et al. Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard[J]. University of Arizona, University of Western Australia,2017,8(12).
APA Kirchhof, Sebastian.,Hetem, Robyn S..,Lease, Hilary M..,Miles, Donald B..,Mitchell, Duncan.,...&Murray, Ian W..(2017).Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard.ECOSPHERE,8(12).
MLA Kirchhof, Sebastian,et al."Thermoregulatory behavior and high thermal preference buffer impact of climate change in a Namib Desert lizard".ECOSPHERE 8.12(2017).
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