Contrasting root length, nutrient content and carbon sequestration of seagrass growing in offshore carbonate and onshore terrigenous sediments in the South China Sea
文献类型：期刊论文
| 作者 | Wu, Yunchao; Cui, Lijun1; Yu, Shuo2; Liu, Songlin; Zhao, Chunyu1; Jiang, Zhijian; Huang, Xiaoping1; Fang, Yang1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2019 |
| 卷号 | 662页码:151 |
| ISSN号 | 0048-9697 |
| 关键词 | Seagrass Carbonate sediment Terrigenous sediment Morphology Nutrient Carbon sequestration |
| DOI | 10.1016/j.scitotenv.2019.01.175 |
| 英文摘要 | Due to distinct human disturbances and sediment type, seagrasses growing in offshore carbonate and onshore terrigenous sediments may show contrasting characteristics. A comparison of seagrass morphology, nutrient content and sediment carbon pools was taken for seagrass beds inhabiting offshore carbonate sediments in Xuande Atoll and onshore terrigenous sediments in Hainan Island, South China Sea. Lower nitrogen (N) content was observed in the aboveground (1.1%-2.8%) and belowground (0.4%-1.5%) tissue of seagrasses in Xuande Atoll than in the same species (aboveground: 2.7%-3.6%; belowground: 1.2%-2.8%) in Hainan Island. Greater depletion of leaf delta N-15 of Thalassia hemprichii (T. hemprichii) and Halodule pinifolia (H. pinifolia) in Xuande Atoll indicated nitrogen fixation might be the major source of nitrogen in oligotrophic reef environments. The root lengths of the seagrass species in Xuande Atoll were longer than the same species in Hainan Island. Sediment inorganic carbon (SIC) was considerably higher than sediment organic carbon (SOC) in the carbonate sediment, while the opposite trend was found in the terrigenous sediments. The SOC stock in the carbonate and terrigenous sediments was 2.41 +/- 0.78 Mg C ha(-1) and 2.20 +/- 0.34Mg C ha(-1) in the top 5 cm, respectively, while the corresponding SIC was 84.38 +/- 21.65 Mg C ha(-1) and 1.27 +/- 0.51 Mg C ha(-1), respectively. The average CO2 (net sequestered) in the carbonate sediment in Xuande Atoll and the terrigenous sediment in Hainan Island were -48.22 +/- -12.21 Mg C ha(-1) and 1.44 +/- 0.03 Mg C ha(-1), respectively. This suggested seagrass sediment was a source of CO2 during sediment production in the carbonate sediment but a sink of CO2 in the terrigenous sediment. Thus, the N concentration in seagrass leaf, root length, sediment carbon composition and pools were contrasted between offshore carbonate sediments and onshore terrigenous sediments. (C) 2019 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17859]  |
| 专题 | 南海海洋研究所_中科院海洋生物资源可持续利用重点实验室 |
| 作者单位 | 1.South China Sea Inst Oceanol, CAS Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.State Ocean Adm, Fouth Inst Oceanog, Beihai 53600, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Yunchao,Cui, Lijun,Yu, Shuo,et al. Contrasting root length, nutrient content and carbon sequestration of seagrass growing in offshore carbonate and onshore terrigenous sediments in the South China Sea[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,662:151, 159. |
| APA | Wu, Yunchao.,Cui, Lijun.,Yu, Shuo.,Liu, Songlin.,Zhao, Chunyu.,...&Fang, Yang.(2019).Contrasting root length, nutrient content and carbon sequestration of seagrass growing in offshore carbonate and onshore terrigenous sediments in the South China Sea.SCIENCE OF THE TOTAL ENVIRONMENT,662,151. |
| MLA | Wu, Yunchao,et al."Contrasting root length, nutrient content and carbon sequestration of seagrass growing in offshore carbonate and onshore terrigenous sediments in the South China Sea".SCIENCE OF THE TOTAL ENVIRONMENT 662(2019):151. |
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来源：南海海洋研究所
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