• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Limnologica >Impact of enhanced summer temperatures on the distribution and structure of zooplankton communities in the heated stratified lakes: Implications for climate change
【24h】

Impact of enhanced summer temperatures on the distribution and structure of zooplankton communities in the heated stratified lakes: Implications for climate change

机译：增强夏季气温对加热分层湖泊浮游龙社区分布及结构的影响：对气候变化的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Long-term studies demonstrated that temperature increases of 3-6 degrees C above natural levels caused reduction in zooplankton biomass. We hypothesized that large-bodied species would respond more strongly to temperature increases than small-bodied species because they are less adapted to high temperatures. Studies were conducted in three similar stratified meso-eutrophic lakes with different thermal regimes. Enhanced temperature, migrations, food abundance and dissolved oxygen concentrations were analyzed as potential factors that could affect zooplankton biomass. The warmest lake differed from the other lakes by lower total biomass of zooplankton less abundance of large-bodied zooplankton species, smaller population body sizes of abundant cladoceran species and higher food concentrations. Day and night abundances of zooplankton did not differ between the vertical strata and between the pelagic and littoral zones in the three study lakes suggesting that zooplankton did not vertical or horizontal migrations. We suggest that decreases of dissolved oxygen below the epilimnion prevented zooplankton from vertically migrating. As a result, zooplankton accumulated in the epilimnion where temperatures were higher than in the lower strata. Regression analysis showed that temperature had a significant negative impact on the total biomass of zooplankton in the epilimnion of the warmest study lake. Therefore, our results are in accordance with the ecological Bergmann's and James' rules dealing with the temperature-size relationships.
机译：长期研究表明，温度增加3-6摄氏度，在浮游动物生物量减少的天然水平降低。我们假设大型物种对温度的响应比小体积越来越强，因为它们不太适应高温。用不同的热量制度在三种类似分层的中间欧逸湖中进行研究。分析了增强的温度，迁移，食品丰度和溶解氧浓度作为可能影响浮游动物生物量的潜在因素。最温暖的湖泊与其他湖泊不同，通过养曲龙少量大量的大型浮游动物种类，少量克拉根群物种和更高的食物浓度较小的群体体积。浮游车的日夜丰富在三个研究湖泊中的垂直地层和垂直地层之间没有区别，这表明浮游动物没有垂直或水平迁移。我们表明，癫痫症下方的溶解氧降低阻止浮游动物垂直迁移。结果，在癫痫中累积的浮游植物，其中温度高于下层。回归分析表明，温度对最温暖的研究湖的癫痫症的浮游动物的总生物量产生了显着的负面影响。因此，我们的结果符合生态Bergmann和詹姆斯的规则，处理温度尺寸关系。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号