Predictions of climate change infer increased environmental harshness and altered connectivity in a cluster of temporary pools
Predictions of climate change infer increased environmental harshness and altered connectivity in a cluster of temporary pools
复制标题
对气候变化的预测表明，环境条件会更加恶劣，临时水池群的连通性也会发生变化
DOI：
--
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
L. Brendonck
中科院分区：
文献类型：
--
作者：
Karen Tuytens;B. Vanschoenwinkel;A. Waterkeyn;L. Brendonck
总结1。未来蒸发和降水制度的适度变化可能会对小型和临时水生生境中的浮游动物种群产生显著影响，因为它会导致更高的盐度和更短的湿期，减少通过水池之间的水文联系进行的被动扩散，并通过将繁殖体暴露在风中而增加这种扩散。2. 利用水文模型，我们在南非的一个天然的临时岩石池群中模拟了各种气候变化情景。在我们的模拟中，向干燥气候的转变与持久性的减少和电导率的增加有关，导致足以孵化，生长和繁殖水生生物的淹没百分比降低（神仙虾最多减少21%）。溢出池之间的连接发生的频率较低（最多28%）。然而，更频繁的干燥事件（高达15%）导致休眠繁殖体暴露于风的增加，可能促进池簇内的扩散，但也导致繁殖体库的损失。4. 研究结果表明，环境变化不仅会影响岩池元种群和群落的局部（池内）选择压力，还会影响区域动态。
SUMMARY 1. Future moderate changes in evaporation and precipitation regimes could have pronounced effects on zooplankton populations in small and temporary aquatic habitats, by causing higher salinity and a shorter wet phase and by reducing passive dispersal via hydrological connections between pools and increasing it by exposing propagules to the wind. 2. Using a hydrological model, we simulated various climate change scenarios in a natural cluster of temporary rock pools in South Africa. 3. In our simulations, a shift towards a drier climate was associated with reduced permanence and increased conductivity, resulting in a lower percentage of inundations sufficient for the hatching, growth and reproduction of aquatic organisms (up to a 21% decline for a fairy shrimp). Connections between pools by overflowing occurred less frequently (by up to 28%). However, more frequent desiccation events (by up to 15%) led to increased exposure of dormant propagules to wind, possibly promoting dispersal within the pool cluster but also leading to losses from the propagule bank. 4. Our results suggest that environmental change might not only affect local (within-pool) selection pressures but also regional dynamics in rock pool metapopulations and communities.