Accelerated biogenic silica dissolution by marine invertebrate digestion:in comparison with phosphorus and iron
文献类型：CNKI期刊论文
| 作者 | Ying WANG ; Shaoping KUANG; Guangtao ZHANG
|
| 发表日期 | 2022-05-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | macroinvertebrate nutrient regeneration feces mariculture fecal silicate dissolution |
| 英文摘要 | 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | Supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No.XDA23050401) |
| 卷 | v.40期:03页:282-292 |
| 语种 | 英文; |
| 分类号 | Q958.8 |
| ISSN号 | 2096-5508 |
| 源URL | [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.LaboratoryforMarineEcologyandEnvironmentalScience,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 2.QingdaoUniversityofScienceandTechnology 3.JiaozhouBayMarineEcosystemResearchStation,InstituteofOceanology,ChineseAcademyofSciences |
| 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. |
入库方式： OAI收割
来源：海洋研究所
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