Meredith A. Holgerson, Nicholas E. Ray, Chelsea Russ
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引用次数: 0
摘要
池塘在全球范围内非常丰富,对全球碳循环非常重要。尽管池塘有大量的温室气体排放,但它们也能在沉积物中封存碳。在这里,我们研究了22个可忽略流域的温带实验池塘中的有机碳(OC)埋藏率,这些池塘的碳固存仅来自当地的初级生产。这些池塘在1964年同样建造,此后经历了不同的管理策略,使我们能够测试管理行为如何影响埋葬率。平均而言,池塘累积了67.1 g OC m−2 1年(范围38.3–113.6 g OC m−2 yr−1)——大约是全球湖泊平均埋葬率的两倍,与全球湿地平均埋葬率相似。在有大型植物、鱼类和较高氮的池塘中,碳埋藏率较高 : P负载。我们认为,由于对天然和人工池塘中OC埋藏的低估,内陆水域的全球碳汇可能被大大低估。
High rates of carbon burial linked to autochthonous production in artificial ponds
Ponds are globally abundant and important to the global carbon cycle. Although ponds have large greenhouse gas emissions, they also sequester carbon in their sediments. Here, we studied organic carbon (OC) burial rates in 22 temperate experimental ponds with negligible watersheds, where carbon sequestration derives solely from autochthonous primary production. The ponds were built identically in 1964 and have since experienced different management strategies, allowing us to test how management actions influence burial rates. On average, the ponds accumulated 67.1 g OC m−2 yr−1 (range 38.3–113.6 g OC m−2 yr−1)—about double the global average burial rate for lakes and similar to global averages for wetlands. Carbon burial rates were higher in ponds with macrophytes, fish, and higher N : P loads. We contend that the global carbon sink for inland waters may be substantially underestimated due to the undervaluation of OC burial in natural and artificial ponds.
期刊介绍:
Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.