Food web analyses of the saline Lake Chany complex in Western Siberia and the survey of the environment based on NOAA images

我们利用碳和氮稳定同位素比率对俄罗斯西西伯利亚茶尼湖河口部分的两个地点的鱼类群落和浮游生物进行了食物网分析。结果表明，所采集的鱼苗流动性较低，以浮游动物为食的鱼苗在各采集点均有生长，浮游动物食物网包括鱼苗在各采集点之间存在空间分离。活动的食肉动物的迁徙结合了河口空间隔离的食物链。成年鲤科鱼类的同位素特征表明，大型植物(或附生植物)的生产通过表观食草动物和草食性/底栖食性鲤科鱼类途径并入食物网，尽管浮游植物在浅水和高产的Chany湖复合体中发挥了重要作用。我们可以得出结论，杂食性鲤科动物对复杂的沿海食物网络结构做出了贡献，其中大型植物是重要的初级生产者。Natura…中溶质的主要化学更多的L水来自俄罗斯西西伯利亚的查尼湖综合体和附近的湖泊，堪比现代海水。溶解硫酸盐具有明显的高硫同位素特征，其值可与哈萨克斯坦北部类似盐湖、咸海、巴尔哈什湖和阿拉泰山脉的石膏矿床区分开来。查尼湖盆地溶解硫酸盐的一个可能来源是来自东部古生代山脉的一个隐藏的同生体的遗传，该山脉涉及具有明显重硫同位素值的下寒武统建造。我们利用1999年至2004年无冰期的NOAA卫星图像，评估了查尼湖复合体湖泊面积和周围植被的季节变化。与地面实况数据相比，这些地区似乎受到了积雪融化和芦苇生长的影响。在与世隔绝的尤丁斯基池，从8月到10月观察到了较大的年际差异。尤丁斯池可能受到年降水量和蒸发量波动的影响。因此，尤定斯基地区被认为对西伯利亚西南部的气候敏感。较少

We conducted food web analyses of fish community as well as plankton at two sites in the estuarine part of Chany Lake (West Siberia, Russia) using carbon and nitrogen stable isotope ratios. The results showed that most fish fry collected had low mobility and fed on zooplankton grew in each site, and there was a spatial separation of planitonic food webs including fish fry between the sites. Migration of mobile piscivorous predators combined the spatially segregated food chains in the estuary. Isotopic signatures of adult cyprinid fishes revealed that macrophytic (or epiphytic) production was incorporated into the food web through epifaunal grazers and the herbivorous/benthivorous cyprinid pathway, though phytoplankton played an important role in the shallow and highly productive Lake Chany complex. We can conclude that omnivorous cyprinids contribute to the complex littoral food web structure where macrophytes are a significant primary producer. The major chemistry of solutes in natura … More l waters from the Lake Chany complex and nearby lakes in western Siberia, Russia, is comparable to modern seawater. Dissolved sulfates are characterized by a markedly high sulfur isotopic signature and the values can be distinguished from those in similar saline lakes in northern Kazakhstan, the Aral Sea, Lake Barhashi, and gypsum deposits in the Altai Mountains. A possible source of the dissolved sulfates in the Lake Chany basin is the inheritance of a hidden connate from eastern Paleozoic ranges that involve Lower Cambrian formations with distinctly heavy sulfur isotope values. We evaluated the seasonal changes in the lake area and surrounding vegetation of the Lake Chany complex using NOAA satellite images of the ice-free periods from 1999 to 2004. Compared to ground-truth data, the areas seem to be influenced by the inflow of snow-melt and reed growth. At the isolated Yudinskii Pool, large interannual differences were observed from August to October. Yudinskii Pool may be affected by annual fluctuation in precipitation and evaporation. Therefore, the Yudinskii area is considered sensitive to climate of southwestern Siberia. Less