Freshwater communities and environmental data of a polygonal tundra landscape at the Berelekh River in the Indigirka lowland (NE Siberia)@en

Patterned ground of the polygonal tundra yields sensitive indicators of environmental and climate change. Polygon ponds, mires and cryosoils are typical components of Arctic Siberian wetlands underlain by permafrost.Field studies of recent environmental dynamics were carried out in the Indigirka lowland in summer 2011 and 2012. Using a multidisciplinary approach, several stages of polygonal systems were studied as modern tundra habitats in the surrounding of the WWF station Kytalyk at the Berelekh River, a tributary of the Indigirka River. The floral and faunal associations of the polygonal tundra landscape were described. Ecological, hydrological, meteorological, limnological and cryological features were analyzed in order to evaluate modern environmental conditions and their essential controlling parameters. A monitoring program was carried out to measure changes of air, water and ground temperatures as well as water conductivity, water level and soil moisture and to collect water, diatom, zooplankton, zoobenthos, tecamoebae, phytoplankton and ostracod samples. These data sets contain environmental field data, logger data, various ecological data, and analyses of sediments and water.多边形冻土苔原的有序地表结构可作为环境与气候变化的灵敏指示指标。多边形水塘、沼泽湿地与冻土土壤（cryosoils）是西伯利亚北极多年冻土湿地的典型组成部分。2011年与2012年夏季，研究团队在因迪吉尔卡低地（Indigirka lowland）开展了近现代环境动态的野外调查研究。本研究采用多学科研究方法，以因迪吉尔卡河（Indigirka River）支流别列列赫河（Berelekh River）沿岸的WWF基塔利克站（WWF station Kytalyk）周边的现代苔原生境为研究对象，对多边形地貌系统的多个发育阶段展开了考察。本研究对该多边形冻土苔原景观中的动植物群落组成进行了详细记述。为评估当前环境状况及其关键主控参数，研究团队对区域内的生态、水文、气象、湖沼学（limnology）及冻土学（cryology）特征开展了系统分析。同时实施了长期监测计划，对气温、水体与土壤温度、水体电导率、水位及土壤湿度的变化进行连续观测，并采集了水体、硅藻（diatom）、浮游动物（zooplankton）、底栖动物（zoobenthos）、有壳变形虫（tecamoebae）、浮游植物（phytoplankton）及介形类（ostracod）样本。本数据集涵盖野外环境监测数据、自动记录仪数据、各类生态数据，以及沉积物与水体的分析测试结果。