GSTDTAP  > 气候变化
DOI10.1111/gcb.15294
Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression
Scott Hotaling; Alisha A. Shah; Kerry L. McGowan; Lusha M. Tronstad; J. Joseph Giersch; Debra S. Finn; H. Arthur Woods; Michael E. Dillon; Joanna L. Kelley
2020-08-18
发表期刊Global Change Biology
出版年2020
英文摘要

Rapid glacier recession is altering the physical conditions of headwater streams. Stream temperatures are predicted to rise and become increasingly variable, putting entire meltwater‐associated biological communities at risk of extinction. Thus, there is a pressing need to understand how thermal stress affects mountain stream insects, particularly where glaciers are likely to vanish on contemporary timescales. In this study, we measured the critical thermal maximum (CTMAX) of stonefly nymphs representing multiple species and a range of thermal regimes in the high Rocky Mountains, USA. We then collected RNA‐sequencing data to assess how organismal thermal stress translated to the cellular level. Our focal species included the meltwater stonefly, Lednia tumana, which was recently listed under the U.S. Endangered Species Act due to climate‐induced habitat loss. For all study species, critical thermal maxima (CTMAX > 20°C) far exceeded the stream temperatures mountain stoneflies experience (<10°C). Moreover, while evidence for a cellular stress response was present, we also observed constitutive expression of genes encoding proteins known to underlie thermal stress (i.e., heat shock proteins) even at low temperatures that reflected natural conditions. We show that high‐elevation aquatic insects may not be physiologically threatened by short‐term exposure to warm temperatures and that longer‐term physiological responses or biotic factors (e.g., competition) may better explain their extreme distributions.

领域气候变化 ; 资源环境
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/291107
专题气候变化
资源环境科学
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GB/T 7714
Scott Hotaling,Alisha A. Shah,Kerry L. McGowan,et al. Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression[J]. Global Change Biology,2020.
APA Scott Hotaling.,Alisha A. Shah.,Kerry L. McGowan.,Lusha M. Tronstad.,J. Joseph Giersch.,...&Joanna L. Kelley.(2020).Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression.Global Change Biology.
MLA Scott Hotaling,et al."Mountain stoneflies may tolerate warming streams: Evidence from organismal physiology and gene expression".Global Change Biology (2020).
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