Bioturbation enhances the aerobic respiration of lake sediments in warming lakes.
Bioturbation enhances the aerobic respiration of lake sediments in warming lakes.
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DOI：
10.1098/rsbl.2016.0448
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发表时间：
2016-08
期刊：
影响因子：
3.3
通讯作者：
Krause S
中科院分区：
文献类型：
--
作者：
Baranov V;Lewandowski J;Krause S
虽然湖泊只占地球总表面的不到2%，但它们在全球生物地球化学循环中发挥着重要作用。例如，浅水湖是碳代谢的重要场所。有氧呼吸是湖泊碳代谢的重要驱动力之一。在这方面，以前低估了底栖动物(沉积物基质的生物改造和沉积物的通风)对沉积物有氧呼吸的生物扰动影响。由于水温的季节性变化，生物活动可能会在一年中发生变化。本研究利用微观世界实验研究生物扰动(双翅目、摇蚊科幼虫)对湖泊沉积物呼吸作用的影响。而在5℃时，有摇蚊和不有摇蚊的沉积物的呼吸作用没有差别，在30℃时，每平方米2000个摇蚊的微型沉积物的呼吸强度是无人居住的沉积物的4.9倍。我们的结果表明，湖泊水温升高可以显著增强湖泊沉积物的呼吸作用，这使我们能够更好地了解湖泊呼吸和碳代谢的季节变化以及全球变暖的潜在影响。
While lakes occupy less than 2% of the total surface of the Earth, they play a substantial role in global biogeochemical cycles. For instance, shallow lakes are important sites of carbon metabolism. Aerobic respiration is one of the important drivers of the carbon metabolism in lakes. In this context, bioturbation impacts of benthic animals (biological reworking of sediment matrix and ventilation of the sediment) on sediment aerobic respiration have previously been underestimated. Biological activity is likely to change over the course of a year due to seasonal changes of water temperatures. This study uses microcosm experiments to investigate how the impact of bioturbation (by Diptera, Chironomidae larvae) on lake sediment respiration changes when temperatures increase. While at 5°C, respiration in sediments with and without chironomids did not differ, at 30°C sediment respiration in microcosms with 2000 chironomids per m2 was 4.9 times higher than in uninhabited sediments. Our results indicate that lake water temperature increases could significantly enhance lake sediment respiration, which allows us to better understand seasonal changes in lake respiration and carbon metabolism as well as the potential impacts of global warming.
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影响因子：
4.6
作者：
Baranov V;Lewandowski J;Romeijn P;Singer G;Krause S
通讯作者：
Krause S
影响因子：
6.1
作者：
Hoelker, Franz;Vanni, Michael J.;Lewandowski, Joerg
通讯作者：
Lewandowski, Joerg
影响因子：
1.8
作者：
Roskosch, Andrea;Hette, Nicolas;Lewandowski, Joerg
通讯作者：
Lewandowski, Joerg
影响因子：
5.4
作者：
Haggerty, Roy
通讯作者：
Haggerty, Roy
影响因子：
2.6
作者：
HAMBURGER, K;DALL, PC;LINDEGAARD, C
通讯作者：
LINDEGAARD, C