Decimation by sea star wasting disease and rapid genetic change in a keystone species, Pisaster ochraceus
Decimation by sea star wasting disease and rapid genetic change in a keystone species, Pisaster ochraceus
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海星消耗性疾病和关键物种 Pisaster ochraceus 的快速遗传变化导致大量死亡
DOI:
10.1073/pnas.1800285115
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Dawson, Michael N
中科院分区:
文献类型:
--
作者:
Schiebelhut, Lauren M.;Puritz, Jonathan B.;Dawson, Michael N
Standing genetic variation enables or restricts a population’s capacity to respond to changing conditions, including the extreme disturbances expected to increase in frequency and intensity with continuing anthropogenic climate change. However, we know little about how populations might respond to extreme events with rapid genetic shifts, or how population dynamics may influence and be influenced by population genomic change. We use a range-wide epizootic, sea star wasting disease, that onset in mid-2013 and caused mass mortality inPisaster ochraceusto explore how a keystone marine species responded to an extreme perturbation. We integrated field surveys with restriction site-associated DNA sequencing data to (i) describe the population dynamics of mortality and recovery, and (ii) compare allele frequencies in matureP. ochraceusbefore the disease outbreak with allele frequencies in adults and new juveniles after the outbreak, to identify whether selection may have occurred. We foundP. ochraceussuffered 81% mortality in the study region between 2012 and 2015, and experienced a concurrent 74-fold increase in recruitment beginning in late 2013. Comparison of pre- and postoutbreak adults revealed significant allele frequency changes at three loci, which showed consistent changes across the large majority of locations. Allele frequency shifts in juvenileP. ochraceus(spawned from premortality adults) were consistent with those seen in adult survivors. Such parallel shifts suggest detectable signals of selection and highlight the potential for persistence of this change in subsequent generations, which may influence the resilience of this keystone species to future outbreaks.
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DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
R. R. Strathmann
通讯作者:
R. R. Strathmann
影响因子:
2.4
作者:
B. Menge
通讯作者:
B. Menge
影响因子:
3.7
作者:
Miner CM;Burnaford JL;Ambrose RF;Antrim L;Bohlmann H;Blanchette CA;Engle JM;Fradkin SC;Gaddam R;Harley CDG;Miner BG;Murray SN;Smith JR;Whitaker SG;Raimondi PT
通讯作者:
Raimondi PT
影响因子:
2.7
作者:
Wares JP;Schiebelhut LM
通讯作者:
Schiebelhut LM
影响因子:
7.7
作者:
S. Willis;C. Hollenbeck;Jonathan B. Puritz;J. Gold;D. Portnoy
通讯作者:
D. Portnoy