期刊
JOURNAL OF PALEOLIMNOLOGY
卷 65, 期 2, 页码 181-199出版社
SPRINGER
DOI: 10.1007/s10933-020-00159-5
关键词
Biological indicators; Lake sediments; Ecosystem services; Paleolimnology; Wetlands
资金
- Coordination for the Improvement of High Education Personal (CAPES)
- National Council for Scientific and Technological Development [CNPq 431253/2018-8, CNPq 204880/2018-1]
- Brazilian Agricultural Research Corporation, Embrapa [03.17.00.047]
- National Geographic Society [9797-15]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior-Brasil (CAPES) [001]
- Fundacao Universidade Federal de Mato Grosso do Sul UFMS/MEC - Brazil
The study suggests that enhanced carbon burial occurred in floodplain lakes around the Upper Paraguay River during the mid-Holocene, when lake levels declined under relatively dry climate conditions, increasing littoral area at the expense of open water and capturing floating macrophyte islands. This sheds new light on hydroclimate controls on carbon cycling in the Pantanal wetlands and improves interpretations of geochemical measures on bulk organic matter in floodplain lake cores.
Wetland carbon storage is an important and environmentally sensitive ecosystem service. Carbon burial in the floodplain lakes of the Pantanal (tropical South America) appears to have varied during the late Quaternary, but several paleolimnological studies have recorded unusually high sediment organic carbon content from similar to 7.3 to 6.0 cal kyr BP in lakes connected to the Upper Paraguay River. We conducted a multi-indicator (phytoliths, sponge spicules, and geochemistry) study of a sediment core from Lake Caceres (Bolivia), and found evidence for enhanced organic carbon burial during the middle Holocene that provides insights into the flooding history of the Upper Paraguay River. delta(13)C(org)and C/N data suggest that organic matter deposited at that time in Lake Caceres was from macrophytes. Similar datasets from three other floodplain lakes are consistent with this finding. We suggest that enhanced carbon burial occurred when lake levels declined under relatively dry climate conditions, which increased the littoral area at the expense of open water and captured floating macrophyte islands. This study sheds new light on hydroclimate controls on carbon cycling in the Pantanal wetlands, and improves interpretations of geochemical measures on bulk organic matter in floodplain lake cores.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据