globalchange  > 气候变化事实与影响
DOI: 10.1111/1365-2435.13279
WOS记录号: WOS:000466375600009
论文题名:
How to assess Drosophila heat tolerance: Unifying static and dynamic tolerance assays to predict heat distribution limits
作者: Jorgensen, Lisa Bjerregaard; Malte, Hans; Overgaard, Johannes
通讯作者: Jorgensen, Lisa Bjerregaard
刊名: FUNCTIONAL ECOLOGY
ISSN: 0269-8463
EISSN: 1365-2435
出版年: 2019
卷: 33, 期:4, 页码:629-642
语种: 英语
英文关键词: climate change ; critical thermal maximum ; CTmax ; distribution predictions ; heat coma ; heat death ; insects ; thermal death time curves
WOS关键词: THERMAL TOLERANCE ; STRESS RESISTANCE ; CLIMATE ; MELANOGASTER ; TEMPERATURE ; WIDESPREAD ; CONSEQUENCES ; POPULATIONS ; PLASTICITY ; PATTERNS
WOS学科分类: Ecology
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Thermal tolerance is a critical determinant of ectotherm distribution, which is likely to be influenced by future climate change. To predict such distributional changes, simple and comparable measures of heat tolerance are needed and these measures should ideally correlate with the characteristics of the species current thermal environments. A recent model (thermal tolerance landscapes-TTLs) uses the exponential relation between temperature and knockdown time to describe the thermal tolerance of ectotherms across time/temperature scales. Here, we established TTLs for 11 Drosophila species representing different thermal ecotypes by measuring knockdown time at 9-17 stressful temperatures (0.5 degrees C intervals). These temperatures caused knockdown times ranging from 12 hrs and all species displayed the expected exponential relation between temperature and knockdown time (average R-2 = 0.98). Previous studies using TTLs have reported a trade-off between tolerance to acute and chronic heat stress in ectotherms. The present study did not find evidence to support this trade-off in drosophilids. Instead, we show how this "trade-off" can arise as an analytical artefact caused by insufficient data collection and excessive data extrapolation. Dynamic assays represent an alternative method to describe heat tolerance of ectotherms, where animals are exposed to gradually increasing temperatures until knockdown. The comparability of static and dynamic assays has previously been questioned, but here we show that static and dynamic assays give comparable information on heat tolerance. Using the constants derived from static TTLs, we mathematically model the expected dynamic knockdown temperature and subsequently confirm this model by comparison to empirically obtained knockdown temperatures from all 11 species. Characterisation of heat tolerance in laboratory settings is an important tool in thermal biology, but more so if the measures correlate with the environmental gradients that characterise the fundamental niche of species. Here, we show that both static and dynamic assays were characterised by strong correlations to precipitation of the driest month and maximum temperature of the warmest month combined (R-2 = 0.68-0.71). This demonstrates that both assay types offer simple measures of heat tolerance that are ecologically relevant for the tested drosophilids.


Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/132867
Appears in Collections:气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Aarhus Univ, Dept Biosci, Zoophysiol, Aarhus, Denmark

Recommended Citation:
Jorgensen, Lisa Bjerregaard,Malte, Hans,Overgaard, Johannes. How to assess Drosophila heat tolerance: Unifying static and dynamic tolerance assays to predict heat distribution limits[J]. FUNCTIONAL ECOLOGY,2019-01-01,33(4):629-642
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Jorgensen, Lisa Bjerregaard]'s Articles
[Malte, Hans]'s Articles
[Overgaard, Johannes]'s Articles
百度学术
Similar articles in Baidu Scholar
[Jorgensen, Lisa Bjerregaard]'s Articles
[Malte, Hans]'s Articles
[Overgaard, Johannes]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Jorgensen, Lisa Bjerregaard]‘s Articles
[Malte, Hans]‘s Articles
[Overgaard, Johannes]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.