Accelerated biogenic silica dissolution by marine invertebrate digestion:in comparison with phosphorus and iron

IOCAS-IR

	Accelerated biogenic silica dissolution by marine invertebrate digestion:in comparison with phosphorus and iron
	Ying WANG; Shaoping KUANG ; Guangtao ZHANG
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2022-05-15
出版年	2022
卷号	v.40 期号:03 页码:282-292
文献类型	CNKI期刊论文
摘要	Herbivore digestionin aquatic ecosystems is usually considered a method of nutrie nt repackaging rather than recycling,as recalcitrant and low-level nutrients are presumed for their egesta.We hypothesize that this opinion holds only for nutrients recycled by excretion and egestion,not for those elements recycled overwhelmingly by fecal decomposition.In this study,we compared the dissolution of biogenic silica(BSi),phosphorus(P) and iron(Fe) between two food items and fecal pellets of two marine invertebrates fed on artificial seawaters free of bacteria.Relative to raw food materials,the mass proportion in fecal pellets of B Si increased,while that of P and Fe decreased.During the 21 days of incubation,the total dissolution rate of BSi was 13.9-36.0 times higher in fecal pellets than food items,followed by P(1.5-4.2 times) and Fe(1.1-2.4 times).While the dissolution of BSi and Fe occurred mostly in the first few days,P was mostly released in the last ten days.Regarding B Si dissolution,a higher rate was observed in oyster Crassostrea gigas than the Echiuran Urechis unicinctus,but no significant difference was found between fecal pellets in either species under naturally available diatom food(Phaeodactylum tricornutum) and introduced terre strial food(rice husk powder),respectively.Our results show direct evidence of digestion-associated nutrients mobilization.BSi dissolution after animal digestion may be similarly efficient to that caused by bacteria colo nization in natural se awater.
关键词	macroinvertebrate nutrient regeneration feces mariculture fecal silicate dissolution
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A006;
CNKI专题名称	生物学;
分类号	Q958.8
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA23050401)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/187439
专题	中国科学院海洋研究所
作者单位	1.QingdaoUniversityofScienceandTechnology 2.JiaozhouBayMarineEcosystemResearchStation,InstituteofOceanology,ChineseAcademyofSciences 3.LaboratoryforMarineEcologyandEnvironmentalScience,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao)
推荐引用方式 GB/T 7714	Ying WANG,Shaoping KUANG,Guangtao ZHANG. Accelerated biogenic silica dissolution by marine invertebrate digestion:in comparison with phosphorus and iron. 2022.