Limnological characteristics of lakes located across arctic treeline in northern Russia
Limnological characteristics of lakes located across arctic treeline in northern Russia
复制标题
俄罗斯北部北极林线湖泊的湖泊学特征
DOI：
10.1023/a:1003542322519
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发表时间：
2004
期刊：
影响因子：
2.6
通讯作者：
D. Lean
中科院分区：
文献类型：
--
作者：
K. E. Duff;T. Laing;J. Smol;D. Lean
湖沼学数据(如水化学、湖水温度、植被带和人类影响程度)是从横跨俄罗斯北极树线的三个区域的湖泊中收集的：位于北极西伯利亚中部的泰米尔半岛和莱纳河入海口附近，以及位于俄罗斯西部北极的伯霍拉河入海口附近。皮尔逊相关性和典型变量分析显示，所有三个地区的环境梯度相似。表示水的离子组成的变量(即阳离子、阴离子、溶解无机碳和电导率)与营养物质、叶绿素a、颗粒有机物和金属(即铁和锰)浓度高度相关。湖水透明度与水体颜色(即铁、锰和溶解有机碳)和生产力有关。湖泊之间的区域差异很大，似乎反映了地质、水文和人类影响的差异。例如，在莱纳河和伯霍拉河地区，钠和氯的浓度与靠近海洋的距离有关，而在更内陆的泰米尔地区则与此无关。在泰米尔半岛的诺里尔斯克，大量的采矿和冶炼显然导致靠近城市的湖泊中的主要离子和金属浓度升高。地表水温度、营养物质和相关变量对于区分不同植被群落中的湖泊特别有用。森林湖泊通常较温暖，溶解有机碳(DOC)浓度略有上升。森林冻土带湖泊中的颗粒状有机质、铁和锰的浓度往往较高。冻土带湖泊的特点是营养物质和DOC浓度较低。这些数据将有助于建立模型，预测未来气候变化对北极和亚北极水生生态系统的影响，并为这些偏远地区未来的湖沼学研究提供基线数据。
Limnological data (e.g., water chemistry, lakewater temperature, vegetation zone and degree of human impact) were collected from lakes spanning the Russian arctic treeline in three regions: on the Taimyr Peninsula and near the mouth of the Lena River, both in central arctic Siberia, and near the mouth of the Pechora River, western arctic Russia. Pearson correlation and canonical variates analyses revealed similar environmental gradients in all three regions. Variables expressing ionic composition of the water (i.e., cations, anions, dissolved inorganic carbon and conductivity) were highly intercorrelated, as were nutrients, chlorophyll a, particulate organic matter and metal (i.e., Fe and Mn) concentrations. Lakewater transparency was related to water colour (i.e., Fe, Mn and dissolved organic carbon) and productivity. Regional differences among the lakes were strong and appeared to reflect differences in geology, hydrology and human impact. For example, Na and Cl concentrations were related to proximity to the ocean in the Lena and Pechora River regions but not in the more inland Taimyr region. Extensive mining and smelting at Norilsk, on the Taimyr Peninsula, has apparently resulted in elevated major ion and metal concentrations in lakes closer to the city. Surface water temperatures, nutrients, and related variables were particularly useful for distinguishing lakes in different vegetation biomes. Forest lakes were typically warmer, with slightly elevated concentrations of dissolved organic carbon (DOC). Lakes in the forest–tundra zone often had higher concentrations of particulate organic matter, Fe and Mn. Tundra lakes were characterized by low nutrient and DOC concentrations. These data will facilitate the development of models that predict the outcome of future climatic change on arctic and subarctic aquatic ecosystems, as well as provide baseline data for future limnological studies in these remote regions.