Abstract

The growth and production of glacial relic amphipods Monoporeia affinis in a small subarctic lake were studied based on detailed seasonal observations in 2019–2021. Growth and production were closely related to trophic conditions (chlorophyll a concentration). The maximum values were observed at low water temperatures (~5°C) in early summer, coinciding with the spring maximum of chlorophyll. The summer warming of bottom waters was accompanied by a decrease in the growth rate of amphipods, which is apparently associated with the consumption of most of the primary production in the pelagic zone. It is concluded that current climatic conditions can adversely affect glacial relicts even in cold-water lakes of the subarctic zone.

中文翻译：

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亚北极湖泊中 Monoporeia affinis（片足纲：Pontoporeiidae）生长和生产的季节动态：温度和营养条件的作用

摘要

基于2019-2021年详细的季节观测，研究了亚北极小型湖泊中冰川遗迹端脚类动物Monoporeia affinis的生长和生产。生长和产量与营养条件（叶绿素a浓度）密切相关。最大值出现在初夏的低水温（~5°C）下，与春季叶绿素的最大值一致。夏季底层水域变暖伴随着片脚类动物生长速度的下降，这显然与中上层大部分初级产品的消耗有关。结论是，即使在亚北极地区的冷水湖中，当前的气候条件也会对冰川遗迹产生不利影响。