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首页> 外文期刊>Chironomus >Chironomidae (Diptera) in the Himalayan Lakes – A study of sub-fossil assemblages in the sediments of two high altitude lakes from Nepal
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Chironomidae (Diptera) in the Himalayan Lakes – A study of sub-fossil assemblages in the sediments of two high altitude lakes from Nepal

机译：喜马拉雅湖中的Chironomidae（Diptera）–来自尼泊尔两个高海拔湖泊沉积物中亚化石组合的研究

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Chironomid head capsules were identified from sediment cores taken from Lake Gokyo (4750 m) and Lake Gosaikunda (4350 m) in the east-central Himalaya, to determine taxonomic composition of chironomid assemblages over time.? The sedimentation rate of Lake Gosaikunda was estimated at 0.05 cm/yr and that of Gokyo was estimated at 0.07 cm/yr by 210 Pb and 137 Cs dating.? Micropsectra sp. was dominant in the sediments of both lakes.? Lake Gokyo sediments also contained Pseudodiamesa sp., Eukiefferiella/Tvetenia sp., Orthocladius/Cricotopus sp. and Rheocricotopus sp. ?The concentration of headcapsules was nearly an order of magnitude greater in the Lake Gosaikunda core, which contained mostly Micropsectra sp. and Pseudodiamesa sp.? These taxa are typical of cold oligotrophic lakes.? Differences in lake depth, dissolved minerals, plus epi- and hypolimnetic temperature and dissolved oxygen suggest that stratification and temperature-induced increases in primary production may affect chironomid assemblages in these pristine lakes.? Palaeolimnological studies of Himalayan lakes should include replicate cores within lake, to increase headcapsule sample sizes given potentially high rates of sedimentation from glacial runoff. Key words: high altitude lakes, Himalaya, Chironomidae, palaeolimnology, Nepal
机译：从喜马拉雅山东部中部的Gokyo湖（4750 m）和Gosaikunda湖（4350 m）的沉积物岩心中确定了Chironomid头囊，以确定随时间推移Chironomid组合的分类学组成。通过210 Pb和137 Cs测年，Gosaikunda湖的沉积速率估计为0.05 cm / yr，Gokyo的沉积速率估计为0.07 cm / yr。 Micropsectra sp。在两个湖泊的沉积物中占主导地位。 Gokyo湖的沉积物还包含假二叠纪种，Eukiefferiella / Tvetenia种，Orthocladius / Cricotopus种。和Rheocricotopus sp。 Gosaikunda湖核心中的头胶囊浓度几乎增加了一个数量级，其中主要含有Micropsectra sp。和Pseudodiamesa sp。？这些分类群是冷贫营养湖的典型特征。湖泊深度，溶解的矿物质，表观和低速温度以及溶解氧的差异表明，分层和温度引起的初级产量增加可能会影响这些原始湖泊中的手足类动物组合。喜马拉雅湖泊的古生物学研究应包括湖泊内的重复岩心，以增加可能因冰川径流造成的高沉积速率而增加的头胶囊样本量。关键词：高海拔湖泊，喜马拉雅山，Chironomidae，古昆虫学，尼泊尔

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