Ecosystem Effects of a Tropical Cyclone on a Network of Lakes in Northeastern North America
Ecosystem Effects of a Tropical Cyclone on a Network of Lakes in Northeastern North America
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DOI：
10.1021/es302063v
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发表时间：
2012-11-06
影响因子：
11.4
通讯作者：
Weathers, Kathleen C.
中科院分区：
文献类型：
--
作者：
Klug, Jennifer L.;Richardson, David C.;Weathers, Kathleen C.
在这里，我们使用高频原位自动传感器网络记录了热带气旋艾琳对北美东北部9个湖泊和水库的热结构和生态系统代谢的区域影响。艾琳通过后，所有系统的热稳定性均在h内下降，变化幅度与落湖水量和集水区相对于湖泊体积有关。在各系统中，温度变化预测了初级产量的变化，但混合层厚度的变化不影响代谢。相反，呼吸成为生态系统代谢的驱动因素，与湖内初级生产分离，可能是由于陆地来源的碳的增加。从区域上看，热结构的能量扰动比陆源物质流入扰动的持续时间短。考虑到预计随着气候变化强降雨事件的区域增加，相对于湖泊，这些风暴的生态影响的强度和寿命将在集水区较大的系统中更大。容量，特别是当重要材料可从集水区运输时。这个案例说明了自动化传感器网络和相关的人类网络在评估系统响应和调节极端事件的物理和生态响应的特征方面的力量。
Here we document the regional effects of Tropical Cyclone Irene on thermal structure and ecosystem metabolism in nine lakes and reservoirs in northeastern North America using a network of high-frequency, in situ, automated sensors. Thermal stability declined within hours in all systems following passage of Irene, and the magnitude of change was related to the volume of water falling on the lake and catchment relative to lake volume. Across systems, temperature change predicted the change in primary production, but changes in mixed-layer thickness did not affect metabolism. Instead, respiration became a driver of ecosystem metabolism that was decoupled from in-lake primary production, likely due to addition of terrestrially derived carbon. Regionally, energetic disturbance of thermal structure was shorter-lived than disturbance from inflows of terrestrial materials. Given predicted regional increases in intense rain events with climate change, the magnitude and longevity of ecological impacts of these storms will be greater in systems with large catchments relative to lake. volume, particularly when significant material is available for transport from the catchment. This case illustrates the power of automated sensor networks and associated human networks in assessing both system response and the characteristics that mediate physical and ecological responses to extreme events.