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浏览/检索结果: 共4条，第1-4条 帮助 限定条件 发表日期：2019     已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 海草床和海洋牧场沉积物中微生物的群落动态与驱动因素分析 学位论文 北京: 中国科学院研究生院, 2019 作者:  郑鹏飞 收藏  |  浏览/下载：25/0  |  提交时间：2021/01/13 古菌，细菌，多样性，海草床，海洋牧场   渤海湾营养盐与浮游植物群落结构的变化特征及关系分析 学位论文 中国科学院烟台海岸带研究所: 中国科学院大学, 2019 作者:  刘西汉 收藏  |  浏览/下载：2/0  |  提交时间：2021/01/19 营养盐  浮游植物  时空分布  历史变化  渤海湾  Nutrient  Phytoplankton  Distribution  Historical Variation  Bohai Bay   东海内陆架季节性低氧海区柱状沉积物氧化还原敏感元素对环境变化的指示 学位论文 中国科学院海洋研究所: 中国科学院大学, 2019 作者:  解兴伟 收藏  |  浏览/下载：56/0  |  提交时间：2019/06/18 氧化还原敏感元素（rse）  沉积环境  海洋沉积物  季节性低氧  东海内陆架   烟台牟平海洋牧场季节性低氧对大型底栖动物群落的生态效应 期刊论文 生物多样性, 2019, 卷号: 27, 期号: 2, 页码: 200-210 作者:  李宝泉 收藏  |  浏览/下载：18/0  |  提交时间：2020/06/17 低氧  群落结构  群落恢复  敏感种  机会种  hypoxia  community structure  community recovery  sensitive species  opportunistic species  Hypoxia is a common phenomenon in the world's oceans, especially in the shallow waters of coastal zones. Rates of hypoxia are increasing due to global climatic changes and anthropogenic activities. Hypoxia can cause mass mortality of marine animals and can have severe negative impacts on marine ecosystems. To better understand the effects of hypoxia on macrobenthic communities, a survey was carried out in the Muping Marine Ranch (Yantai) during June, August and September of 2016. Results showed that seasonal hypoxia led to changes in benthic community structure, especially in terms of species composition and dominant species. The dominant species were Polychaeta Lumbrinereis latreilli, Sternaspis scutata and Mollusca Endopleura lubrica in summer. The opportunistic species Lumbrinereis latreilli increased, whereas, sensitive species such as Leptomya minuta, Glycera chirori, Upogebia major, Pontocrates altamarimus, Eriopisella sechellensis decreased during the hypoxic period of August. Hypoxia also reduced biodiversity indices. The effect of hypoxia on abundance and biomass were not significant, mainly because of the increase in the opportunistic Lumbrinereis latreilli, which counteracted the decline in abundance and biomass of other species. Individual physiological tolerance to hypoxia was different among species. Lumbrinereis latreilli showed higher tolerance to hypoxia in dissolved oxygen (DO) = 1.0 mg/L compared to other species. Some sensitive species, such as Leptomya minuta, Upogebia major, Pontocrates altamarimus and Eriopisella sechellensis showed lower tolerance when DO < 2.5 mg/L. When DO increased to 2.5 mg/L, the macrobenthic community start to recover gradually. The recovery extent and time needed were closely related to the degree of seasonal hypoxia.