Ecology of benthic diatoms from Lake Macro Prespa (Macedonia)
Ecology of benthic diatoms from Lake Macro Prespa (Macedonia)
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马克罗普雷斯帕湖（马其顿）底栖硅藻生态学
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
L. Ector
中科院分区：
文献类型：
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作者：
Z. Levkov;S. Blanco;S. Krstic;Teofil Nakov;L. Ector
普雷斯帕湖属于古湖泊群。通过地下通道，它与奥赫里德湖相连。在过去的二十年里，普雷斯帕湖的特点是水位下降，文化和自然富营养化加剧。在此期间，很少进行生态研究，主要是基于浮游植物群落的组成和生物量。从2002年6月至2003年5月，18个物理和化学参数和底栖硅藻的组成进行了分析，在12个采样点的大普雷斯帕湖。在湖中鉴定了约300种硅藻。通过计数200个硅藻瓣计算相对丰度，其中143个硅藻分类群在至少一个采样点的丰度超过1%。深海底栖生物群落以小环藻和毛双壁藻为主，而在沿岸的区域，这些群落以小型舟形藻种为主。对于统计分析，使用17种最丰富的硅藻分类群（总丰度> 1%）。TP对硅藻群落结构的影响与预期的不一致。控制物种分布和丰度的主要环境因素是铵和金属阳离子（铜，锰，钾），其次，溶解氧和Secchi深度，从相关性和多变量（CCA）分析推断。
Lake Prespa belongs to the group of ancient lakes. By subterranean channels it is connected with Lake Ohrid. In the past two decades, Lake Prespa has been characterized by a decrease of its water level and an increased cultural and natural eutrophication. In this period, very few ecological studies were performed, based mainly on composition and biomass of the phytoplankton community. From June 2002 to May 2003 analyses of 18 physical and chemical parameters and composition of benthic diatoms were performed on 12 sampling sites of Lake Macro Prespa. About 300 diatom taxa were identified in the lake. Relative abundances were calculated by counting 200 diatom valves, and 143 diatom taxa had abundances of more than 1 % in at least one sampling site. Deep benthic communities were dominated by Cyclotella ocellata and Diploneis mauleri, while in the littoral region these communities were dominated by small Navicula sensu lato species. For statistical analyses, the 17 most abundant diatom taxa (> 1 % in total abundance) were used. Contrarily to the expectations, TP had a negligible influence on diatom community structure. The main environmental factors controlling species distribution and abundances were ammonium and metallic cations (Cu, Mn, K) and, secondarily, dissolved oxygen and Secchi depth, as inferred from both correlation and multivariate (CCA) analysis.