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首页> 外文期刊>Journal of Freshwater Ecology >Variation in carbon and nitrogen stable isotopes in POM and zooplankton in a deep reservoir and relationship to hydrological characteristics.
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Variation in carbon and nitrogen stable isotopes in POM and zooplankton in a deep reservoir and relationship to hydrological characteristics.

机译：深水库中POM和浮游动物碳氮稳定同位素的变化及其与水文特征的关系。

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摘要

We investigated the carbon and nitrogen stable isotope composition of particulate organic matter (POM) and zooplankton to understand the effects of highly variable hydrologic inputs with the onset of the summer monsoon season in Lake Soyang, Korea. The main characteristic separating pre-monsoon and post-monsoon seasons in Lake Soyang is the dramatic difference in hydrologic inflow. Pre-monsoon delta 13C-POM (range -32.4 to -21.8 per mil) was lower than post-monsoon delta 13C-POM (range -25.5 to -19.9 per mil). Epilimnetic delta 13C-POM was higher post-monsoon compared to pre-monsoon, except in 2007. In the metalimnion, pre-monsoon delta 13C-POM varied among years, while the variation in delta 13C-POM post-monsoon was small and was related to the inflow of organic matter during summer monsoon storms. delta 13C-zooplankton was lower post-monsoon (range -31.9 to -24.4 per mil) compared to pre-monsoon (range -19.4 to -17.7 per mil), while delta 15N-zooplankton showed the opposite pattern (pre- and post-monsoon average 6.6+or-2.0 per mil and 4.3+or-1.5 per mil, respectively). In Lake Soyang, the seasonal variation in delta 13C-zooplankton was closely related to annual succession in the phytoplankton community and delta 13C-phytoplankton. Thus, the results of this study provide some insights into the use of delta 13C and delta 15N measurements for understanding linkages between varying hydrologic characteristics and seasonal variation in the stable isotope composition of zooplankton. The dramatic seasonal change in hydrologic inputs in the monsoonal climate and consequent changes in turbid surface water inflow is linked with changes in the phytoplankton and zooplankton communities in Lake Soyang.
机译：我们研究了颗粒有机物（POM）和浮游动物的碳氮稳定同位素组成，以了解随着韩国季阳湖夏季风季节的来临，高度可变的水文输入的影响。索阳湖将季风前后季节分开的主要特征是水文流入量的巨大差异。季风前三角洲 13 C-POM（范围-32.4至-21.8 / mil）低于季风后三角洲 13 C-POM（范围-25.5至-19.9每密耳）。除2007年外，上季风后三角洲 13 C-POM高于季风前，在金属离子中，季风前三角洲 13 C-POM随年份变化，而季风后三角洲 13 C-POM的变化很小，并且与夏季风风暴期间有机质的流入有关。季风后，三角洲 13 C浮游动物的水平较低（范围为每密尔-31.9至-24.4），而季风前三角洲的 13 k较低（范围为-19.4至-17.7 / mil），而三角洲 15 < / sup> N-浮游动物表现出相反的模式（季风前后平均每密尔6.6+或-2.0和每密尔4.3+或-1.5）。在索阳湖中，δ 13 C-浮游植物的季节变化与浮游植物群落和δ 13 C-浮游植物的年度演替密切相关。因此，这项研究的结果为使用δ 13 C和δ 15 N测量值提供了一些见解，以了解稳定同位素中不同水文特征与季节变化之间的联系。浮游动物的组成。季风气候中水文投入的急剧季节性变化以及随之而来的地表水浑浊变化与索阳湖浮游植物和浮游动物群落的变化有关。

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