Ganga River Ecology Research Laboratory, Environmental Science Division, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
Bull Environ Contam Toxicol. 2023 Sep 14;111(3):40. doi: 10.1007/s00128-023-03790-w.
Here, we quantified sediment phosphorus (P) release in relation to concentrations of dissolved oxygen (DO) and sulphate, and increase in temperature in a major river of India subjected to long-term human perturbations. We found a substantial increase in sediment P release, an ecosystem feedback, at higher concentrations of sulphate, more towards the lower end of DO concentrations. A 2°C warming increased sediment P release upto 25.21% and caused a drop in DO level by 16%. Our findings reconcile the observed sulphate-driven changes in sediment P release across systems, and provide first experimental evidence of warming-induced increases. Our results imply that aquatic ecosystems will undergo self-fertilizing effect as the planet warming interacts with other human perturbations. This has implications for eutrophication linkages and ecosystem functioning.
在这里，我们量化了印度一条主要河流中与溶解氧 (DO) 和硫酸盐浓度以及温度升高有关的沉积物磷 (P) 释放情况。我们发现，在硫酸盐浓度更高、DO 浓度更低的情况下，沉积物 P 释放大量增加，这是一种生态系统反馈。升温 2°C 使沉积物 P 释放增加了 25.21%，并导致 DO 水平下降了 16%。我们的研究结果解释了在不同系统中观察到的硫酸盐驱动的沉积物 P 释放变化，并提供了变暖引起的增加的第一个实验证据。我们的研究结果表明，随着地球变暖与其他人为干扰相互作用，水生生态系统将经历自我施肥效应。这对富营养化的联系和生态系统功能有影响。
