长期的集合种群遗传结构变化：对北极低地岩池中的大型蚤进行的长达四分之一个世纪的回溯性研究。
Long-term changes in metapopulation genetic structure: a quarter-century retrospective study on low-Arctic rock pool Daphnia.
机构信息
Department of Zoology and Biological Station, University of Oklahoma, Norman, OK 73019, USA.
出版信息
Proc Biol Sci. 2010 Jan 7;277(1678):139-46. doi: 10.1098/rspb.2009.1326. Epub 2009 Oct 7.
Population genetic surveys approximately 25 years apart examined the distribution and abundance of asexual clones of the freshwater zooplankter Daphnia pulex complex in rock pools near Churchill, Manitoba, Canada. In 1984-1985, melanic members of this species complex were present in 131 rock pools at this site, but were only detected in 90 of these pools in 2007-2008. Allozymic surveys conducted during these two time periods revealed that 59 per cent of these populations showed unchanged clonal composition. Total clonal replacement occurred in 8 per cent of the populations, while the others (33%) included a mixture of 'resident' clones and new 'colonists'. We discuss these changes in light of shifts in biotic and abiotic factors. We also discuss the use of rock pool habitats as 'sentinel' systems for examining long-term environmental changes in the ecological genetics of aquatic organisms in the Arctic.
大约每隔 25 年进行一次的种群遗传学调查，研究了加拿大马尼托巴省丘吉尔附近的岩石池中淡水浮游动物 Daphnia pulex 复合体的无性克隆的分布和丰度。1984-1985 年，该物种复合体的黑化成员出现在该地点的 131 个岩石池中，但在 2007-2008 年仅在其中的 90 个池中检测到。在这两个时期进行的同工酶调查显示，59%的这些种群显示出不变的无性克隆组成。8%的种群发生了总克隆替换，而其他种群（33%）则包括“本地”克隆和新“殖民者”的混合物。我们根据生物和非生物因素的变化讨论了这些变化。我们还讨论了利用岩石池生境作为“哨兵”系统，来研究北极地区水生生物生态遗传学中长期环境变化。
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