DOI: 10.1016/j.marpolbul.2017.09.005
Scopus记录号: 2-s2.0-85029505281
论文题名: Shading and simulated grazing increase the sulphide pool and methane emission in a tropical seagrass meadow
作者: Lyimo L.D. ; Gullström M. ; Lyimo T.J. ; Deyanova D. ; Dahl M. ; Hamisi M.I. ; Björk M.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2017
语种: 英语
英文关键词: Disturbances
; Hydrogen sulphide
; Methane
; Seagrass meadows
Scopus关键词: Biodegradation
; Biomass
; Hydrogen sulfide
; Methane
; Sediments
; Sulfur compounds
; Anthropogenic activity
; Belowground biomass
; Disturbances
; In-situ experiments
; Seagrass meadows
; Sediment pore water
; Sulphate reducing bacteria
; Sulphide concentration
; Plants (botany)
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Though seagrass meadows are among the most productive habitats in the world, contributing substantially to long-term carbon storage, studies of the effects of critical disturbances on the fate of carbon sequestered in the sediment and biomass of these meadows are scarce. In a manipulative in situ experiment, we studied the effects of successive loss of seagrass biomass as a result of shading and simulated grazing at two intensity levels on sulphide (H2S) content and methane (CH4) emission in a tropical seagrass meadow in Zanzibar (Tanzania). In all disturbed treatments, we found a several-fold increase in both the sulphide concentration of the sediment pore-water and the methane emissions from the sediment surface (except for CH4 emissions in the low-shading treatment). This could be due to the ongoing degradation of belowground biomass shed by the seagrass plants, supporting the production of both sulphate-reducing bacteria and methanogens, possibly exacerbated by the loss of downwards oxygen transport via seagrass plants. The worldwide rapid loss of seagrass areas due to anthropogenic activities may therefore have significant effects on carbon sink-source relationships within coastal seas. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/88226
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Department of Ecology, Environment and Plant Sciences, Stockholm University, SE-106 91 Stockholm, Sweden; School of Biological Science, University of Dodoma, P.O. Box 338, Dodoma, Tanzania; Department of Molecular Biology and Biotechnology, University of Dar es Salaam, P.O. Box 35060, Dar es Salaam, Tanzania
Recommended Citation:
Lyimo L.D.,Gullström M.,Lyimo T.J.,et al. Shading and simulated grazing increase the sulphide pool and methane emission in a tropical seagrass meadow[J]. Marine Pollution Bulletin,2017-01-01