Invasion of the body snatchers: the role of parasite introduction in host distribution and response to salinity in invaded estuaries
Invasion of the body snatchers: the role of parasite introduction in host distribution and response to salinity in invaded estuaries
复制标题
身体掠夺者的入侵：寄生虫引入在入侵河口宿主分布和对盐度反应中的作用
DOI：
10.1098/rspb.2021.0703
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
C. Tepolt
中科院分区：
文献类型：
--
作者：
April M. H. Blakeslee;Darby L. Pochtar;A. Fowler;C. S. Moore;T. Lee;Rebecca B. Barnard;Kyle M. Swanson;Laura C. Lukas;Matt Ruocchio;M. Torchin;A. W. Miller;G. Ruiz;C. Tepolt
在动态系统中，有机体面临着可能施加权衡的可变选择力量。在河口，盐度是生物多样性的强大驱动力，而寄生虫则影响物种分布和人口统计。我们沿着北卡罗来纳州两条河流的盐度梯度测试了一种入侵的阉割寄生虫及其泥蟹宿主在低盐度压力和寄生之间的权衡。我们在三年中每六到八周进行一次实地调查，以确定影响寄生虫流行率、宿主丰度和相关类群多样性的因素。我们还通过检测寄主对盐度的反应(对权利的时间和基因表达)来寻找低盐度胁迫的特征。我们发现盐度和温度显著影响寄生虫的流行，低盐度地区(低于10个实际盐度单位(PSU))没有感染，温度较高的中等盐度地区的种群感染率高达60%。寄主丰度与寄生虫流行率呈负相关。寄主基因的表达对盐度的驯化是可塑性的，但一些渗透调节和免疫相关基因表现出来源依赖的盐度反应。在没有中性遗传结构的背景下，我们发现了一个与盐度密切相关的遗传标记，这表明可能对立地变异进行选择。我们的研究阐明了自然动态系统中的选择性权衡如何塑造宿主进化生态。
In dynamic systems, organisms are faced with variable selective forces that may impose trade-offs. In estuaries, salinity is a strong driver of organismal diversity, while parasites shape species distributions and demography. We tested for trade-offs between low-salinity stress and parasitism in an invasive castrating parasite and its mud crab host along salinity gradients of two North Carolina rivers. We performed field surveys every six to eight weeks over 3 years to determine factors influencing parasite prevalence, host abundance, and associated taxa diversity. We also looked for signatures of low-salinity stress in the host by examining its response (time-to-right and gene expression) to salinity. We found salinity and temperature significantly affected parasite prevalence, with low-salinity sites (less than 10 practical salinity units (PSU)) lacking infection, and populations in moderate salinities at warmer temperatures reaching prevalence as high as 60%. Host abundance was negatively associated with parasite prevalence. Host gene expression was plastic to acclimation salinity, but several osmoregulatory and immune-related genes demonstrated source-dependent salinity response. We identified a genetic marker that was strongly associated with salinity against a backdrop of no neutral genetic structure, suggesting possible selection on standing variation. Our study illuminates how selective trade-offs in naturally dynamic systems may shape host evolutionary ecology.
军备竞赛和堑壕战动态下寄主寄生物共同进化的适应速度和基因组足迹
影响因子：
3.3
作者：
A. Tellier;S. Moreno–Gámez;W. Stephan
通讯作者：
W. Stephan
影响因子：
16.8
作者：
Ben Stern, David;Lee, Carol Eunmi
通讯作者：
Lee, Carol Eunmi
DOI：
10.1073/pnas.1619147114
发表时间：
2017-04-04
影响因子：
11.1
作者：
Brunner, Franziska S.;Anaya-Rojas, Jaime M.;Eizaguirre, Christophe
通讯作者：
Eizaguirre, Christophe