珊瑚脂质是其共生虫黄藻密度降低时的重要能量来源

	珊瑚脂质是其共生虫黄藻密度降低时的重要能量来源
其他题名	Coral lipids are an important energy source when their symbiotic zooxanthellae density decreases
	门征 1; 陈汉吉 1; 许慎栋1,2,3 ; 余克服 1,3; 莫洪燕 1
发表期刊	海洋学报
ISSN	0253-4193
	2023
卷号	45 期号:1 页码:71-79
关键词	珊瑚能量供给虫黄藻脂质氮同位素
英文摘要	Coral bleaching has become increasingly severe in recent years.Bleaching means a decrease in the symbiotic zooxanthellae density in corals.However,the significance of lipids in corals to maintain the stability of energy supply when the zooxanthellae density decreases remains unclear.Favia palauensis and Porites lutea samples collected in the Xisha Islands in March and June 2020 as materials were used in this study.By combining physiological parameters (zooxanthellae density and lipid content) with geochemical indexes (stable nitrogen isotope delta~(15)N_z value of zooxanthellae),the response of coral lipids to the changes in zooxanthellae density and photosynthetic intensity was investigated.The results showed that the zooxanthellae density and delta~(15)N_z value of two genera of corals decreased significantly in summer,implying that the decrease in zooxanthellae density in summer resulted in a decrease in their photosynthetic intensity.At the same time,the lipid content of the two genera of corals also decreased significantly,and the lipid content was positively correlated with zooxanthellae density and delta~(15)N_z value,indicating that there was a coupling relationship between the coral lipid content and the changes of the photosynthetic intensity of zooxanthellae.When photosynthesis intensity decreases,coral can better maintain the stability of energy supply by consuming their own stored lipids,which is of great significance to improve their adaptability to environmental stress and bleaching resilience.
中文摘要	近年来珊瑚白化现象日益严峻。白化意味着珊瑚共生虫黄藻密度的降低,然而目前关于珊瑚体内的脂质在虫黄藻密度降低时对维持能量供给稳定的意义尚不清楚。本研究以2020年3月和6月在西沙群岛采集的帛琉蜂巢珊瑚(Favia palauensis)和澄黄滨珊瑚(Porites lutea)样品为材料,通过生理参数(虫黄藻密度、脂质含量)与地球化学指标(虫黄藻的稳定氮同位素δ^(15)N_(z)值)相结合的方法,探讨了珊瑚脂质对虫黄藻密度及其光合作用强度变化的响应。结果显示,夏季两种珊瑚的虫黄藻密度和δ^(15)N_(z)值均显著下降,意味着夏季虫黄藻密度降低导致了其光合作用强度的降低。与此同时,两种珊瑚的脂质含量也显著下降,并且脂质含量与虫黄藻密度、δ^(15)N_(z)值之间均呈正相关关系,这说明珊瑚脂质含量与虫黄藻光合作用强度的变化之间存在耦合关系。当光合作用强度降低时,珊瑚可以通过消耗其自身储存的脂质更好地维持能量供给的稳定,这对提高环境胁迫的适应能力以及抗白化能力具有重要意义。
文章类型	期刊论文
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:7408373
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/34139
专题	海岸带生物学与生物资源利用重点实验室海岸带生物学与生物资源利用重点实验室_海岸带生物学与生物资源保护实验室
作者单位	1.广西大学海洋学院广西南海珊瑚礁研究重点实验室,广西南宁530004; 2.中国科学院烟台海岸带研究所中国科学院海岸带环境过程与生态修复重点实验室,山东烟台264003; 3.南方海洋科学与工程广东省实验室(珠海),广东珠海519082
推荐引用方式 GB/T 7714	门征,陈汉吉,许慎栋,等. 珊瑚脂质是其共生虫黄藻密度降低时的重要能量来源[J]. 海洋学报,2023,45(1):71-79.
APA	门征,陈汉吉,许慎栋,余克服,&莫洪燕.(2023).珊瑚脂质是其共生虫黄藻密度降低时的重要能量来源.海洋学报,45(1),71-79.
MLA	门征,et al."珊瑚脂质是其共生虫黄藻密度降低时的重要能量来源".海洋学报 45.1(2023):71-79.