文献类型：期刊文献

英文题名：Historical influences of climate, vegetation and soil erosion on primary productivity of Huguangyan Maar Lake, southern China, documented by sedimentary phosphorus fractions for the past 1400 years

作者：Xue, Hongpan[1,2,3];Chen, Yiyan[1];Zhou, Xin[1];Tu, Luyao[4];Ma, Li[1];Jiang, Shiwei[1];Ji, Ming[5];Huang, Chao[6];Kong, Deming[6];Shen, Yanan[1]

机构：[1]Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China;[2]Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Green & High End Utilizat Salt Lake Resour, Xining 810008, Peoples R China;[3]Chinese Acad Sci, Qinghai Prov Key Lab Geol & Environm Salt Lake, Xining 810008, Peoples R China;[4]Nanjing Normal Univ, Sch Marine Sci & Engn, Nanjing 210046, Peoples R China;[5]Yuxi Normal Univ, Sch Chem Biol & Environm, Yuxi 653100, Yunnan, Peoples R China;[6]Guangdong Ocean Univ, Coll Ocean & Meteorol, Guangdong Prov Key Lab Coastal Ocean Variat & Disa, Zhanjiang 524088, Peoples R China

年份：2026

卷号：263

外文期刊名：CATENA

收录：SCI-EXPANDED(收录号：WOS:001659560300001)、、Scopus(收录号：2-s2.0-105026413804)、WOS

基金：Special thanks are due to the editor and four anonymous reviewers for their suggestions, which have greatly improved the manuscript. We thank Zhanjiang Huguangyan Scenic Area Administration for their help during the sediment coring campaign. This study was jointly supported by the National Key Research and Development Program of China (2022YFF0801101) , the National Science Foundation of China (42207504) , and the Youth Innovation Promotion Association, CAS (2018498) .

语种：英文

外文关键词：Lake sediments; Phosphorus fractions; Soil erosion; Primary productivity; Paleoclimate

外文摘要：Understanding long-term phosphorus (P) fraction dynamics in lake sediments and their responses to changes in soil erosion are critical for aquatic environmental management. However, the interactions between climate, vegetation, and soil erosion in regulating lacustrine P fractions and primary productivity remain poorly constrained. Here, we provide a comprehensive analysis of P fractions in Huguangyan Maar Lake (HML) sediments, integrated with soil erosion records, pollen assemblages, paleoclimate data, and productivity proxies derived from previous HML studies. Our results reveal the following order of P fraction abundance in HML sediments: aluminum-bound P (NaOH-P-i) > residual P (Res.-P) > iron and manganese (hydroxide)-bound P (NaBD-P-i) > calcium-bound P (HCl-P-i). According to variations of the different P fractions over the past 1400 years, four main stages were divided. During periods with weak soil erosion (before similar to 830 CE and since 1880 CE), high tree cover increased total organic P (TPo), NaOH-P-i and Res.-P in the weathering products of surrounding rocks, resulting in an increase of these P fractions in the sediments. Lower contents of TPo, NaOH-P-i, and Res.-P were observed for the periods 830-1390 CE (the Medieval Climate Anomaly and its transition to the Little Ice Age) and 1390-1880 CE (the Little Ice Age, high-erosion intervals), which could be attributed to less trees with dominance of herbs and shrubs. Regional precipitation changes may indirectly affect NaBD-P-i and HCl-P-i by influencing duration and degree of lake water stratification and the carbonate ion levels in the water body, respectively. The synergistic effects of erosion, vegetation, and climate ultimately controlled the primary productivity of HML. These findings enhance our understanding of how environmental factors affect lake sediment P fractions and lacustrine productivity, offering insights for long-term lake conservation strategies.