中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 深海科学与工程研究所
  3. 中国科学院深海科学与工程研究所
  4. 深海科学研究部
  5. 深海地质与地球化学研究室
Depth and predation regulate consumption of dolphin carcasses in the hadal zone

文献类型：期刊论文

作者Dasgupta, Shamik; Lin, Mingli; Liu, Shuangquan; Chen, Shun; Xu, Hengchao; Li, Jiwei; Li, Songhai; Peng, Xiaotong
刊名DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
出版日期2024-05-01
卷号207页码:8
关键词Whale fall Food fall Hadal zone Snailfish Hadal amphipod Mariana trench Dolphin fall
ISSN号0967-0637
DOI10.1016/j.dsr.2024.104282
英文摘要Natural whale falls and falls of smaller-sized food have been reported for more than 30 years and are known to be important sources of nutrients and organic matter for the seafloor community. However, the associated species composition and ecological processes during such events in the hadal zone were unknown. Therefore, we aimed to determine the impact of depth and predation on the hadal community during the early stages of a food-fall event. This is the first study to investigate the preliminary stages of the two deepest artificial dolphin-fall events in the Philippine Basin (PB) (-7729 m) and Mariana Trench (MT) (-8200 m). A total of nine dives were conducted over a period of 86 days (PB) and 50 days (MT) using the deep-sea manned submersible "Fendouzhe." Our observations in the PB indicated that the first stage (mobile-scavenger) was controlled by the feeding ecology of hadal amphipods and snailfish. In contrast, the absence of predatory snailfish in the MT enhanced the degradation rate of the carcass compared to that in the PB. Most soft tissues were entirely consumed by scavenging amphipods within days of the event in the MT, whereas in the PB, amphipods were observed taking a feeding hiatus on Day 10 to escape snailfish predation. The second stage (enrichmentopportunist), which hosted few grazing faunas, began at different times in each location and overlapped with the mobile-scavenger stage. Dolphin carcasses, being smaller than those of full-grown whales, can only sustain a large community of scavenging amphipods, and indirectly, predatory snailfish. After the first stage, the dispersed organic matter and limited lipid content in dolphin bones were likely insufficient to sustain an active grazing community or the chemosynthetic community that typically follows. We concluded that water depth influences the successional stages and decomposition rate of food falls in the hadal zone by controlling the dynamic relationship between prey and predators. Our study elucidates the ecology of food-fall events in the hadal zone and highlights the key differences in food-fall events at different depths.
WOS关键词WHALE-FALL ECOSYSTEMS ; DEEP-SEA ; SCAVENGING AMPHIPODS ; FOOD FALL ; ABYSSAL ; ECOLOGY ; FISHES ; FLOOR ; WOOD ; PALEOECOLOGY
资助项目National Key Research and Development Program of China[2022YFC2805400] ; National Natural Science Foundation of China[42225604] ; National Natural Science Foundation of China[41422604]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:001219437800001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Key Research and Development Program of China ; National Natural Science Foundation of China
源URL[http://ir.idsse.ac.cn/handle/183446/11026]  
专题深海科学研究部_深海地质与地球化学研究室
深海科学研究部_深海生物学研究室_海洋哺乳动物与海洋生物声学研究组
专家咨询委员会
通讯作者Li, Songhai; Peng, Xiaotong
作者单位Chinese Acad Sci, Inst Deep Sea Sci & Engn, Deep Sea Sci Div, Sanya 572000, Hainan, Peoples R China
推荐引用方式
GB/T 7714		 Dasgupta, Shamik,Lin, Mingli,Liu, Shuangquan,et al. Depth and predation regulate consumption of dolphin carcasses in the hadal zone[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2024,207:8.
APA Dasgupta, Shamik.,Lin, Mingli.,Liu, Shuangquan.,Chen, Shun.,Xu, Hengchao.,...&Peng, Xiaotong.(2024).Depth and predation regulate consumption of dolphin carcasses in the hadal zone.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,207,8.
MLA Dasgupta, Shamik,et al."Depth and predation regulate consumption of dolphin carcasses in the hadal zone".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 207(2024):8.

入库方式： OAI收割

来源：深海科学与工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。