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浏览/检索结果: 共3条，第1-3条 帮助 限定条件 内容类型：期刊论文     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 黄海桑沟湾水体及沉积物中微塑料污染特征研究 期刊论文 海洋环境科学, 2019, 卷号: 38, 期号: 2, 页码: 198-204 作者:  熊宽旭;  赵新月;  周倩;  付传城;  涂晨 收藏  |  浏览/下载：36/0  |  提交时间：2020/06/17 桑沟湾  微塑料  潮滩  丰度  空间分布  Sanggou bay  microplastics  tidal flats  abundance  spatial distribution  In recent years,research on microplastics pollution in the marine environment has been increasing,but studies on microplastics in water bodies and sediments of the bay under the influence of high-intensity human activities are still rarely reported. In this study,the pollution characteristics of microplastics in the wayer and sediments of Sanggou bay were investigated in December 2017,after the harvest of large-scale aquaculture,with the aim to study the effects of aquaculture activities and hydrodynamics on pollution characteristics and spatial distribution of microplastics in the bay. The results showed that the types of microplastics in the water and sediments of Sanggou bay were mainly fibers,fragments,films,foams and particles. The microplastic abundances in the water and sediments were 1.8 ~ 31.2 N/L,31.2 ~ 1246.8 N/kg,respectively. The average particle sizes of microplastics in water and sediments were 0.51 0.20 mm and 1.54 1.02 mm,respectively. The results of spatial distribution of microplastics in Sanggou bay showed that the high abundance area mainly appears in the inshore waters,and the abundance of microplastics tends to decrease from the inner areas of estuary to the outshore areas. The heterogeneity of microplastic abundance and spatial distribution in Sanggou bay is mainly affected by human activities such as aquaculture,living and shipping,as well as hydrodynamics. In the future,fine sampling and analysis are needed to fully understand the temporal and spatial distribution of microplastics pollution in the bay areas.   碳氮稳定同位素比值在潮间带大型底栖动物组织间差异性研究 期刊论文 海洋学报, 2019, 卷号: 41, 期号: 4, 页码: 74-82 作者:  李宝泉 收藏  |  浏览/下载：37/0  |  提交时间：2020/06/17 潮间带  大型底栖动物  碳氮稳定同位素  食源和营养级分析  采样部位选取  intertidal zone  macrobenthos  carbon and nitrogen stable isotopes  food sources and trophic levels study,sampling parts  The technique of stable isotope analysis has been widely applied for the field of food web studies in recent years.However,few researches concerned about the impacts of different tissues used for analysis on the food web building.With the purpose of accuracy and comparability in the food web studies,the sampling tissues should be standardized.In this study,10macrobenthic species from the intertidal zone of the Yellow River Delta and Yantai were chosen as the target object to test the isotopic characteristic variations ofdelta~(13)C anddelta15 N at different body parts (whole bodies,muscles and gills).Our results show thatdelta~(13)C anddelta15 N values vary in different sampling tissues for most species,which indicates the different tissues used for analysis impact the food web building.To achieve a more accuracy and comparability result,suitable tissue should be primarily chosen for their food sources and trophic levels analysis.Namely,when the organism as predator,their muscles should first be chosen,for examples,adductor and foot muscles of mollusks,leg muscles of crabs and back muscles of fishes  when the organism as prey, most of their tissues,except for indigestible part(for polychaetes,the digestive tract contents should be removed) should be chosen for analysis on food sources and trophic levels of the secondary consumer,for example,whole soft parts of mollusks,the mixture of muscles and gills of crabs.   近50a来新疆降水随海拔变化的区域分异特征/Regional Differentiation Characteristics of Precipitation Changing with Altitude in Xinjiang Region in Recent 50 Years[J] 期刊论文 冰川冻土, 2011, 卷号: 33, 期号: 6, 页码: 1203-1213 作者:  赵成义;  施枫芝;  盛钰;  李君;  赵志敏 收藏  |  浏览/下载：14/0  |  提交时间：2017/12/29 气象观测 降水变化 区域分异 最大降水高度带 新疆 Meteorological Observation In Recent 50 Years Variation Of Precipitation With Altitude Regional Differentiation Characteristics Maximum Precipitation Zone xInjiang Region