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首页> 外文期刊>ICES Journal of Marine Science >Climate-driven long-term trends in Baltic Sea oxygen concentrations and the potential consequences for eastern Baltic cod (Gadus morhua)
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Climate-driven long-term trends in Baltic Sea oxygen concentrations and the potential consequences for eastern Baltic cod (Gadus morhua)

机译：气候驱动的波罗的海氧气浓度长期趋势及其对东部波罗的海鳕鱼的潜在影响（Gadus morhua）

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摘要

Variations in oxygen conditions in the Baltic are influenced by several mechanisms. Generally, the frequency and magnitude of major inflows have been identified as the most crucial process for the renewal of oxygen-depleted water masses in the Baltic Sea. Furthermore, enhanced degradation of suspended organic matter by bacteria over the past few decades has increased oxygen consumption. Finally, the effects of large-scale climate warming are causing long-term variations in oxygen content and saturation as an observed increase in temperature has led to a general decrease in oxygen solubility of water masses. Oxygen-dependent relationships based on field data and laboratory experiments were used to analyse the impact of the observed decrease in oxygen content on eastern Baltic cod (Gadus morhua) stock-specific processes (e.g. survival rates of eggs, settlement probability of juveniles, habitat utilization of spawning fish, age structure of successful spawners, food consumption rates of adult fish). The observed long-term decline in oxygen conditions in the Baltic Sea has had a seemingly generally negative impact on oxygen-related processes for the different life stages of eastern Baltic cod. Experimentally derived results of oxygen-driven processes were validated by field data.
机译：波罗的海的氧气状况变化受多种机理影响。通常，主要流入的频率和大小被确定为波罗的海更新缺氧水团的最关键过程。此外，在过去的几十年中，细菌对悬浮有机物的降解作用增强，增加了耗氧量。最后，大规模的气候变暖的影响导致氧气含量和饱和度的长期变化，因为观察到的温度升高导致水团的氧气溶解度普遍下降。根据田间数据和实验室实验得出的氧依赖性关系，用于分析观察到的氧含量降低对东部波罗的海鳕鱼（特定种群）的特定过程的影响（例如，卵的成活率，幼体的沉降概率，栖息地利用产卵的数量，成功产卵者的年龄结构，成鱼的食物消耗率）。在波罗的海鳕鱼的不同生命阶段，观察到的氧条件在波罗的海的长期下降已经对与氧有关的过程产生了普遍看似消极的影响。通过现场数据验证了氧气驱动过程的实验得出的结果。

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