Spatial heterogeneity of the population age structure of the ostracode Limnocythere inopinata in Hulun Lake, Inner Mongolia and its implications

Spatial heterogeneity of the population age structure of the ostracode Limnocythere inopinata in Hulun Lake, Inner Mongolia and its implications
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内蒙古呼伦湖介形类种群年龄结构的空间异质性及其意义

DOI:
10.1007/s10750-013-1541-6
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发表时间:
2013-05
期刊:
影响因子:
2.6
通讯作者:
Zhai Dayou, Xiao Jule, Fan Jiawei, Zhou Lang, Wen
Zhai Dayou, Xiao Jule, Fan Jiawei, Zhou Lang, Wen
中科院分区:
生物学3区
文献类型:
--
作者:
Zhai Dayou, Xiao Jule, Fan Jiawei, Zhou Lang, Wen

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现有的湖相介形类研究大多集中在种类组成上,对种群结构的研究较少。对内蒙古呼伦湖39个表层沉积物样品进行了介形虫种类组成分析,并对其中17个样品进行了优势介形虫的种群结构分析。共恢复了9种介形虫,其中大部分在植物碎屑丰富的地点表现出较高的丰度,这表明食物供应可能控制了介形虫在湖中的出现。另一方面,无论是亚化石还是活体种群,在较深的水域都有较多的早期龄期,而中龄期和晚期龄期主要出现在较浅的水域,这与底质的粒度组成有关,表明种群结构受到水力控制。介形类在死前和死后的运输可能是造成湖内种群结构变化的原因,但也可能涉及其他因素,如迁徙、内在种群动态和生命周期。我们的数据为在具有相似自然环境的湖泊的古湖泊研究中使用介形虫时对湖泊条件的解释提供了见解。
Most existing studies of lacustrine ostracodes have been focused on species composition, and little attention has been paid to population structure. In this study, 39 surface-sediment samples from Hulun Lake, Inner Mongolia, were analyzed for ostracode species composition and 17 of them also for population structure of Limnocythere inopinata, which is the dominant ostracode in the lake. A total of nine ostracode species were recovered, most of which show high abundances at sites with rich plant detritus, implying the possible control of food supply on ostracode species occurrence in the lake. On the other hand, both the subfossil and the living populations of L. inopinata have greater numbers of early instars in deeper waters, while middle and late instars occur mostly in shallower waters, which is related to the grainsize composition of the substrate, denoting a hydraulic control on population structure. Pre- and post-mortem transport of ostracodes may be responsible for the observed within-lake changes in the population structure, although other factors such as migration, intrinsic population dynamics, and life cycle could also be involved. Our data provide insights into the interpretation of lake conditions when using ostracodes in paleolimnological research of lakes with similar natural settings.
DOI: --
发表时间: 1948
期刊: --
影响因子: --
作者:
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通讯作者: E. S. Liperovskaya
DOI: 10.1007/s10750-010-0295-7
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