Adaptation to climate change: trade-offs among responses to multiple stressors in an intertidal crustacean.
Adaptation to climate change: trade-offs among responses to multiple stressors in an intertidal crustacean.
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DOI：
10.1111/eva.12394
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发表时间：
2016-10
影响因子：
4.1
通讯作者：
Cecola CF
中科院分区：
文献类型：
--
作者：
Kelly MW;DeBiasse MB;Villela VA;Roberts HL;Cecola CF
权衡可能会影响对共生应激源的生理和进化反应，但它们对气候变化的可塑性和适应性反应的影响却知之甚少。为了测试在耐受多种应激源时所产生的遗传和生理权衡，我们杂交了两个在耐热和耐盐性方面存在差异的潮间带桡足类群。从F2代开始，我们在重复系中选择耐热、低盐和高盐的品系。经过5个世代的选择，热选品系具有较强的耐热性，但结实率较低，表明耐热性的能量成本较高。选择耐盐性增强的品系没有表现出适应各自环境的证据；然而，低渗透选择品系表现出对高渗透胁迫的耐受性显著丧失。在环境盐度条件下，这两种盐度选择机制都不会导致耐热性降低；然而，同时暴露在高温和低渗透胁迫下会导致耐热性降低，这意味着对这两种胁迫的耐受性存在生理上的权衡。当我们通过RNA测序量化对高温和盐分胁迫的转录反应时，我们观察到胁迫反应中几乎没有重叠，这表明所观察到的高温和盐分胁迫的协同效应是由相互竞争的能量需求驱动的，而不是共同的胁迫反应途径。
Trade‐offs may influence both physiological and evolutionary responses to co‐occurring stressors, but their effects on both plastic and adaptive responses to climate change are poorly understood. To test for genetic and physiological trade‐offs incurred in tolerating multiple stressors, we hybridized two populations of the intertidal copepod Tigriopus californicus that were divergent for both heat and salinity tolerance. Starting in the F2 generation, we selected for increased tolerance of heat, low salinity, and high salinity in replicate lines. After five generations of selection, heat‐selected lines had greater heat tolerance but lower fecundity, indicating an energetic cost to tolerance. Lines selected for increased salinity tolerance did not show evidence of adaptation to their respective environments; however, hypo‐osmotic selection lines showed substantial loss of tolerance to hyperosmotic stress. Neither of the salinity selection regimes resulted in diminished heat tolerance at ambient salinity; however, simultaneous exposure to heat and hypo‐osmotic stress led to decreased heat tolerance, implying a physiological trade‐off in tolerance to the two stressors. When we quantified the transcriptomic response to heat and salinity stress via RNA sequencing, we observed little overlap in the stress responses, suggesting the observed synergistic effects of heat and salinity stress were driven by competing energetic demands, rather than shared stress response pathways.
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影响因子：
4.8
作者：
Clark, JS
通讯作者：
Clark, JS
影响因子：
2.1
作者：
Berger, D.;Walters, R. J.;Blanckenhorn, W. U.
通讯作者：
Blanckenhorn, W. U.
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y
影响因子：
11.6
作者：
Chirgwin, Evatt;Monro, Keyne;Marshall, Dustin J.
通讯作者：
Marshall, Dustin J.
影响因子：
3.3
作者：
Edmands, S
通讯作者：
Edmands, S