Long‐term change in metabolism phenology in north temperate lakes
Long‐term change in metabolism phenology in north temperate lakes
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DOI：
10.1002/lno.12098
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发表时间：
2022-05
影响因子：
4.5
通讯作者：
R. Ladwig;A. Appling;A. Delany;H. Dugan;Qiantong Gao;N. Lottig;Jemma Stachelek;Paul C. Hanson-
中科院分区：
文献类型：
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作者：
R. Ladwig;A. Appling;A. Delany;H. Dugan;Qiantong Gao;N. Lottig;Jemma Stachelek;Paul C. Hanson-
北温带湖泊溶解氧（DO）动态和代谢的物候学为比较多年时间尺度上的代谢周期提供了基础。虽然近端控制湖DO可以归因于新陈代谢和物理过程，这些过程如何演变几十年来在很大程度上仍然是未知的。代谢物候学可以揭示湖泊之间的一致性的重要性，并有助于在区域尺度上对湖泊代谢控制的一般性结论。我们开发了一个贝叶斯模型框架，以估计DO浓度和代谢在8个湖泊中对比景观在威斯康星州，美国。我们确定了每个湖泊的溶解氧和代谢物候，并使用这些来比较十年的模式与营养状态和景观环境。我们发现，湖泊可以归类为他们的hypolimnetic耗氧动力学，贫营养湖泊有一套不同的模式和富营养湖泊在过去的十年中有统一的趋势增加耗氧。贫营养湖泊的代谢物候同样多样，而威斯康星州南部的富营养湖泊则具有一致的长期代谢趋势和季节性DO消耗模式，突出了营养状态驱动代谢的重要性。富营养化湖泊有较高的幅度和净生态系统生产力的季节性变化相比，贫营养湖泊。一般来说，北温带湖泊的长期代谢趋势表明气候对湖泊代谢的影响有限，长期代谢变化的时间一致性主要由景观环境驱动。
The phenology of dissolved oxygen (DO) dynamics and metabolism in north temperate lakes offers a basis for comparing metabolic cycles over multi‐year time scales. Although proximal control over lake DO can be attributed to metabolism and physical processes, how those processes evolve over decades largely remains unexplored. Metabolism phenology may reveal the importance of coherence among lakes and facilitate general conclusions about the controls on lake metabolism at regional scales. We developed a Bayesian modeling framework to estimate DO concentrations and metabolism in eight lakes in contrasting landscapes in Wisconsin, USA. We identify the DO and metabolism phenologies for each lake, and use those to compare how decadal patterns relate to trophic state and landscape setting. We show that lakes can be categorized by their hypolimnetic oxygen consumption dynamics, with oligotrophic lakes having a diverse set of patterns and eutrophic lakes having uniform trends of increased oxygen consumption over the last decade. Metabolism phenology is likewise diverse for oligotrophic lakes, whereas eutrophic lakes in southern Wisconsin share consistent long‐term patterns of metabolic trends and seasonal DO consumption highlighting the importance of trophic state driving metabolism. Eutrophic lakes had higher magnitudes and more seasonal variation in net ecosystem production in contrast to oligotrophic lakes. Generally, long‐term metabolic trends of north temperate lakes suggest a limited influence of climate on lake metabolism and that temporal coherence of long‐term metabolism change is driven primarily by the landscape setting.