气候变化领域集成服务门户(CCPortal): Cable bacteria control iron-phosphorus dynamics in sediments and water column at two sites of a Coastal Hypoxic Basin

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.876145
	Cable bacteria control iron-phosphorus dynamics in sediments and water column at two sites of a Coastal Hypoxic Basin
	Sulu-Gambari; Fatimah; Seitaj; Dorina; Meysman; Filip J R; Schauer; Regina; Polerecky; Lubos; Slomp; Caroline P
发布日期	2017-06-12
数据集类型	dataset
英文简介	Phosphorus is an essential nutrient for life. The release of phosphorus from sediments is critical in sustaining phytoplankton growth in many aquatic systems and is pivotal to eutrophication and the development of bottom water hypoxia. Conventionally, sediment phosphorus release is thought to be controlled by changes in iron oxide reduction driven by variations in external environmental factors, such as organic matter input and bottom water oxygen. Here, we show that internal shifts in microbial communities, and specifically the population dynamics of cable bacteria, can also induce strong seasonality in sedimentary iron-phosphorus dynamics. Field observations in a seasonally hypoxic coastal basin demonstrate that the long-range electrogenic metabolism of cable bacteria leads to a dissolution of iron sulfides in winter and spring. Subsequent oxidation of the mobilized ferrous iron with manganese oxides results in a large stock of iron-oxide-bound phosphorus below the oxic zone. In summer, when bottom water hypoxia develops and cable bacteria are undetectable, the phosphorus associated with these iron oxides is released, strongly increasing phosphorus availability in the water column. Future research should elucidate whether formation of iron-oxide-bound phosphorus driven by cable bacteria, as observed in this study, contributes to the seasonality in iron-phosphorus cycling in aquatic sediments worldwide
空间范围	Median Latitude: 51.747000 * Median Longitude: 3.892667 * South-bound Latitude: 51.747000 * West-bound Longitude: 3.890000 * North-bound Latitude: 51.747000 * East-bound Longitude: 3.898000
时间范围	2012-01-01T00:00:00 - 2013-12-01T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215321
推荐引用方式 GB/T 7714	Sulu-Gambari,Fatimah,Seitaj,et al. Cable bacteria control iron-phosphorus dynamics in sediments and water column at two sites of a Coastal Hypoxic Basin.2017-06-12.https://doi.org/10.1594/PANGAEA.876145.