Local environment overrides regional climate influence on regime shift in a north temperate lake
Local environment overrides regional climate influence on regime shift in a north temperate lake
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当地环境超越区域气候对北温带湖泊政权转变的影响
DOI：
10.1007/s10452-015-9509-4
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发表时间：
2015-02
期刊：
影响因子：
1.8
通讯作者：
Hansson Lars-Anders
中科院分区：
文献类型：
--
作者：
Zhang Min;Xu Jun;Hansson Lars-Anders
浅水湖泊的状况变化通常以水下植物（清水状况）或浮游植物（浑浊状况）占优势为特征。气候变暖预计会影响水质并促进湖泊浑浊，但我们也可能预计气候和湖泊当地特定动态对生物体相互作用产生协同效应。我们在这里检查了 1980 年至 2011 年温带浅湖 Krankesjön 湖中浮游植物组成的长期变化，该数据集包括 31 年期间的 21 年。我们假设，尽管持续气候变化的影响在我们的长期数据集中是可见的，但当地的具体动态会凌驾于气候影响之上。我们发现蓝藻是最丰富的浮游植物类群，其中小型群落蓝藻占主导地位。在研究期间，小型群落蓝藻的种群密度和最高水温均有所增加。然而，浮游植物聚集的变化可能主要与三个主要因素有关，包括当地营养物质的可用性、浮游动物的放牧以及可能的温度上升趋势。前两个因素与当地的具体动态有关，而最后一个因素则与区域气候有关。我们的长期研究表明，尽管气候变暖对浮游植物群落存在潜在影响，但至少在过去 30 年里，生物相互作用和养分可用性等当地因素可能是比克兰克舍恩湖气候变暖更强的驱动因素。
Regime shifts in shallow lakes are typically characterized by submerged macrophyte (clear water regime) or phytoplankton (turbid regime) dominance. Climate warming is expected to affect water quality and facilitate turbidity in lakes, but we may also expect synergistic effects on organisms’ interactions from climate and local specific dynamics in lakes. We here examined long-term changes in phytoplankton composition in July and August from 1980 to 2011 in a temperate shallow lake, Lake Krankesjön, a dataset including 21 years throughout a 31-year period. We hypothesize that although effects of the ongoing climate change are visible in our long-term data set, local specific dynamics override climate effects. We found that cyanophytes were the most abundant phytoplankton taxa among which small-sized colonial cyanobacteria were dominant. Both population density of small-sized colonial cyanobacteria and maximum water temperature increased over the period of study. However, the variations in the phytoplankton assembly were likely mainly related to three principal factors, including the local availability of nutrients, grazing from zooplankton, and possibly, an increasing trend in temperature. The first two factors are associated with the local specific dynamics, while the last with regional climate. Our long-term study showed that although there were potential climate warming effects on the phytoplankton community, local factors, such as biotic interactions and nutrient availability, were likely stronger drivers than climate warming in Lake Krankesjön at least over the last 30-year period.
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影响因子：
30.7
作者：
Hansson, Lars-Anders;Nicolle, Alice;Bronmark, Christer
通讯作者：
Bronmark, Christer
影响因子：
1.8
作者：
S. Maberly
通讯作者：
S. Maberly
DOI：
10.1007/978-3-540-32210-8
发表时间：
2006
期刊：
--
影响因子：
--
作者：
E. Granéli;J. T. Turner
通讯作者：
E. Granéli;J. T. Turner
影响因子：
2.7
作者：
BLINDOW, I;ANDERSSON, G;JOHANSSON, S
通讯作者：
JOHANSSON, S
影响因子：
2.7
作者：
Blindow, I;Hargeby, A;Andersson, G
通讯作者：
Andersson, G