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Temporal patterns in sediment, carbon, and nutrient burial in ponds associated with changing agricultural tillage
Biogeochemistry ( IF 4 ) Pub Date : 2022-03-17 , DOI: 10.1007/s10533-022-00916-w
Martina N. Rogers , Tanner J. Williamson , Lesley B. Knoll , Michael J. Vanni

Lakes and ponds play a disproportionate role in retaining sediment, carbon, nitrogen, and phosphorus, potentially mitigating negative environmental effects. However, how sequestration rates change over a pond’s lifetime, and how rates are affected by watershed land use practices remains poorly characterized. In this study, we quantified sediment, carbon, nitrogen, and phosphorus burial rates, and the values of these ecosystem services, in three ponds. The ponds were 19–25 years in age (as of 2019), and their watersheds experienced a shift in the early 1990s to conservation tillage. We found that sediment burial rates decreased over time within these ponds (establishment to 2006, vs. 2006 to 2019), consistent with reduced soil erosion rates associated with conservation tillage. However, patterns in carbon, nitrogen, and phosphorus burial rates were not as clear; almost half of the elemental burial rates we quantified increased over time. We suggest that this may be due to increased importance of in-pond processes, such as in situ primary production and subsequent organic matter sedimentation, as the ponds age. Finally, we estimated the ecosystem service value of sediment, carbon, and nutrient retention by these ponds. We estimate that these three ponds provided ecosystem services equal to approximately 360,083 US$ over their lifetimes through burial of sediment, carbon, nitrogen, and phosphorus. Our results show that small retention ponds can provide considerable environmental and economic value by trapping and retaining sediments and nutrients.



中文翻译:

与农业耕作变化相关的池塘沉积物、碳和养分埋藏的时间模式

湖泊和池塘在保留沉积物、碳、氮和磷方面发挥着不成比例的作用,可能会减轻负面的环境影响。然而,在池塘的整个生命周期中,固存率如何变化,以及流域土地利用实践对固存率的影响仍然没有得到很好的描述。在这项研究中,我们量化了三个池塘中的沉积物、碳、氮和磷的埋藏率,以及这些生态系统服务的价值。这些池塘的年龄为 19-25 年(截至 2019 年),它们的流域在 1990 年代初经历了向保护性耕作的转变。我们发现,这些池塘内的沉积物埋藏率随着时间的推移而降低(建立至 2006 年,与 2006 年至 2019 年相比),这与与保护性耕作相关的土壤侵蚀率降低一致。然而,碳、氮、磷埋藏率不明确;我们量化的元素埋藏率几乎有一半随着时间的推移而增加。我们认为这可能是由于随着池塘年龄的增长,池内过程的重要性增加,例如原位初级生产和随后的有机物质沉淀。最后,我们估计了这些池塘的沉积物、碳和养分保留的生态系统服务价值。我们估计,这三个池塘通过掩埋沉积物、碳、氮和磷,在其一生中提供的生态系统服务价值约为 360,083 美元。我们的研究结果表明,小型蓄水池可以通过捕获和保留沉积物和养分来提供可观的环境和经济价值。我们认为这可能是由于随着池塘年龄的增长,池内过程的重要性增加,例如原位初级生产和随后的有机物质沉淀。最后,我们估计了这些池塘的沉积物、碳和养分保留的生态系统服务价值。我们估计,这三个池塘通过掩埋沉积物、碳、氮和磷,在其一生中提供的生态系统服务价值约为 360,083 美元。我们的研究结果表明,小型蓄水池可以通过捕获和保留沉积物和养分来提供可观的环境和经济价值。我们认为这可能是由于随着池塘年龄的增长,池内过程的重要性增加,例如原位初级生产和随后的有机物质沉淀。最后,我们估计了这些池塘的沉积物、碳和养分保留的生态系统服务价值。我们估计,这三个池塘通过掩埋沉积物、碳、氮和磷,在其一生中提供的生态系统服务价值约为 360,083 美元。我们的研究结果表明,小型蓄水池可以通过捕获和保留沉积物和养分来提供可观的环境和经济价值。和这些池塘的养分保留。我们估计,这三个池塘通过掩埋沉积物、碳、氮和磷,在其一生中提供的生态系统服务价值约为 360,083 美元。我们的研究结果表明,小型蓄水池可以通过捕获和保留沉积物和养分来提供可观的环境和经济价值。和这些池塘的养分保留。我们估计,这三个池塘通过掩埋沉积物、碳、氮和磷,在其一生中提供的生态系统服务价值约为 360,083 美元。我们的研究结果表明,小型蓄水池可以通过捕获和保留沉积物和养分来提供可观的环境和经济价值。

更新日期:2022-03-17
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