Multiple extreme environmental conditions of intermittent soda pans in the Carpathian Basin (Central Europe)
Multiple extreme environmental conditions of intermittent soda pans in the Carpathian Basin (Central Europe)
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DOI：
10.1016/j.limno.2016.10.003
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发表时间：
2017-01-01
期刊：
影响因子：
1.7
通讯作者：
Horvath, Zsofia
中科院分区：
文献类型：
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作者：
Boros, Emil;Balogh, Katalin V.;Horvath, Zsofia
苏打湖和平底锅代表了具有独特化学成分的盐分生态系统，存在于各大洲。本研究的目的是确定和描述中欧喀尔巴阡盆地汽水池 (n = 84) 中普遍存在的主要环境梯度和营养状态。 2009-2010 年期间，在水下光照条件下，对 84 个平皿中的溶解有机物、磷和叶绿素 a 进行了研究。此外，在一年中，使用自动传感器每小时测量选定平底锅中的水温。这些盘非常浅（中位深度：15 cm），其极高的浊度（Secchi 深度中位：3 cm，最小值：0.5 cm）是由高浓度的无机悬浮固体（中位：0.4 g L-1，最大值：16 g L-1）引起的，这是 67 个盘（80%）中垂直衰减系数的主要（>50%）影响因素。所有盘均含有腐殖质（中位 DOC：47 mg L-1），总磷浓度也极高（中位：2 mg L-1，最大值：32 mg L-1）。夏季日水温最高值（44℃）和波动最大值（28℃）极高。浅度、水温日波动、间歇性水文周期、高浊度、多腐殖有机碳浓度、高碱度和肥厚等环境边界的组合代表了独特的极端水生生态系统。 (C) 2016 爱思唯尔有限公司。版权所有。
Soda lakes and pans represent saline ecosystems with unique chemical composition, occurring on all continents. The purpose of this study was to identify and characterise the main environmental gradients and trophic state that prevail in the soda pans (n = 84) of the Carpathian Basin in Central Europe. Underwater light conditions, dissolved organic matter, phosphorus and chlorophyll a were investigated in 84 pans during 2009-2010. Besides, water temperature was measured hourly with an automatic sensor throughout one year in a selected pan. The pans were very shallow (median depth: 15 cm), and their extremely high turbidity (Secchi depth median: 3 cm, min: 0.5 cm) was caused by high concentrations of inorganic suspended solids (median: 0.4 g L-1, max: 16 g L-1), which was the dominant (>50%) contributing factor to the vertical attenuation coefficient in 67 pans (80%). All pans were polyhumic (median DOC: 47 mg L-1), and total phosphorus concentration was also extremely high (median: 2 mg L-1, max: 32 mg L-1). The daily water temperature maximum (44 degrees C) and fluctuation maximum (28 degrees C) were extremely high during summertime. The combination of environmental boundaries: shallowness, daily water temperature fluctuation, intermittent hydroperiod, high turbidity, polyhumic organic carbon concentration, high alkalinity and hypertrophy represent a unique extreme aquatic ecosystem. (C) 2016 Elsevier GmbH. All rights reserved.