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深海化能生态系统双壳纲共生体系互作机制研究进展
李超伦,钟兆山,李梦娜,王敏晓
中国科学院海洋研究所
摘要:
双壳纲贝类在深海特殊生境——热液、冷泉及有机沉落生态系统中分布广泛,并且在其体内常含有化能共生细菌为贝类提供营养物质。双壳纲贝类与化能共生菌形成的共生体系对于其适应深海还原性生境至关重要。近40年来随着海洋科考力度加大,深海化能生境的神秘面纱被逐渐揭开,越来越多的深海物种被发现,双壳纲贝类无疑是这些化能生态系统中的优势物种,在此,我们对常见的深海化能共生双壳纲贝类与其内共生菌的互作研究进行总结,主要双壳纲门类包含贻贝科(Mytilidae)、囊螂科(Vesicomyidae)、蛏螂科(Solemyidae)、索足蛤科(Thyasiridae)和满月蛤科(Lucinidae),梳理归纳的内容包括深海化能生态系统的发现、“双壳纲贝类—内共生菌”共生体系的组成、共生体系的营养互作、共生体系的建立与维持以及对未来研究的展望。对这些研究内容的总结有利于进一步加深我们对深海特殊生命系统中共生互作机制的认识。
关键词:  深海化能生态系统  双壳纲  共生体系  互作机制
DOI:10.11693/hyhz20200900265
分类号:
基金项目:
RESEARCH PROGRESS ON THE INTERACTION MECHANISM OF BIVALVE SYMBIOSIS SYSTEM IN DEEP-SEA CHEMOSYNTHETIC ECOSYSTEM
Lichaolun1, zhongzhaoshan2, Limengna1, Wangminxiao1
1.Institute of Oceanology, Chinese Academy of Sciences;2.Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences
Abstract:
Bivalves are most dominant species in the deep-sea habitats, including hydrothermal vents, cold seeps and organic falls, and often contain chemosynthetic symbionts dwelling at the gills to provide nutrients. The symbiosis of bivalve and chemosynthetic symbionts is the milestone events to aid the symbionts surviving in the harsh deep-sea reducing habitats. How do the invertebrate host interact with the symbiotic bacteria, and the functions of symbiosis in the deep-sea adaptation is one of the hotspots in the deep-sea researches. Thus, we review and summarize the status of the current studies on the interaction between common deep-sea chemosynthetic bivalves (Mytilidae, Vesicomyidae, and Solemyidae, Thyasiridae and Lucinidae) and their endosymbiotic bacteria. The review paper will focus on the following aspects, including the diversity of the "bivalve-endosymbiotic" symbiotic systems, the nutritional interaction between the hosts and the bacteria, the mechanisms of symbiosis establishment and maintenance, as well as the prospects for the future work. We’d like to summarize what is done, what is unknown, what is needed in the future works, and try to discuss how the studies of the deep-sea Bivalvia symbiosis can be promoted by the current new technology.
Key words:  deep-sea chemosynthetic ecosystem  bivalves  symbiosis  interaction mechanism
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