检索结果相关分组
- 鄱阳湖水流运动与污染物迁移路径的粒子示踪研究
- 作者： 李云良 姚静 李梦凡 张奇 来源：长江流域资源与环境 年份：2016 文献类型 ：期刊 关键词： 污染物迁移路径 粒子示踪实验 鄱阳湖 粒子示踪模型 水动力模型 水流运动
- 描述：空间面源分布污染物均会沿着不同方向迅速进入湖泊主河道,在快速水流推动下逐渐向北部湖区迁移,但部分污染物因东北部湖湾区存在顺时针方向环流而发生长时间滞留和富集。野外粒子示踪实验同样表明,东北部湖湾区
- 全文：空间面源分布污染物均会沿着不同方向迅速进入湖泊主河道,在快速水流推动下逐渐向北部湖区迁移,但部分污染物因东北部湖湾区存在顺时针方向环流而发生长时间滞留和富集。野外粒子示踪实验同样表明,东北部湖湾区
- 鄱阳湖沙化土地湿地松人工林碳蓄积量研究
- 作者： 曹昀 杨杰 朱悦 王秀文 来源：生态环境学报 年份：2016 文献类型 ：期刊 关键词： 湿地松 植被恢复 鄱阳湖 碳蓄积 沙化土地
- 描述： elliottii)人工林碳含量和碳蓄积量,分析碳蓄积量的空间分布及原因。结果表明:随着沙化程度的加大,林分密度减小,碳蓄积量也减小,表现为轻度沙化区>中度沙化区>重度沙化区,其中,(1)乔木层重度
- 全文： elliottii)人工林碳含量和碳蓄积量,分析碳蓄积量的空间分布及原因。结果表明:随着沙化程度的加大,林分密度减小,碳蓄积量也减小,表现为轻度沙化区>中度沙化区>重度沙化区,其中,(1)乔木层重度
- 鄱阳湖水体氧化亚氮排放特征及影响因素
- 作者： 徐会显 姜星宇 姚晓龙 张路 来源：湖泊科学 年份：2016 文献类型 ：期刊 关键词： 排放 季节变化 鄱阳湖 氧化亚氮
- 描述：于2014年4、7和10月以及2015年1月（分别代表春、夏、秋和冬季）对鄱阳湖13个常规监测点表层水体中氧化亚氮（N2O）浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N2O平均
- 全文：于2014年4、7和10月以及2015年1月（分别代表春、夏、秋和冬季）对鄱阳湖13个常规监测点表层水体中氧化亚氮（N2O）浓度进行测定,并选择合适的模型估算其释放量.结果表明,鄱阳湖全年N2O平均
- 鄱阳湖浮游甲壳动物群落结构特征
- 作者： 刘宝贵 刘霞 吴瑶 钟正 陈宇炜 来源：生态学报 年份：2016 文献类型 ：期刊 关键词： 富营养化 浮游甲壳动物 鄱阳湖 时空分布 水文
- 描述：鄱阳湖是中国第一大淡水湖,具有“丰水为湖,枯水为河”的独特特点。为探讨鄱阳湖浮游甲壳动物群落结构及其时空分布的特征,于2009年全年采集其不同季节、不同水位期的浮游甲壳动物样品进行定量分析。结果显示
- 全文：鄱阳湖是中国第一大淡水湖,具有“丰水为湖,枯水为河”的独特特点。为探讨鄱阳湖浮游甲壳动物群落结构及其时空分布的特征,于2009年全年采集其不同季节、不同水位期的浮游甲壳动物样品进行定量分析。结果显示
- 鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 作者： 蒋剑虹 来源：江西师范大学 年份：2016 文献类型 ：学位论文
- 描述：鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 作者： 蒋剑虹 来源：江西师范大学 年份：2016 文献类型 ：学位论文
- 描述：鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 作者： 蒋剑虹 来源：江西师范大学 年份：2016 文献类型 ：学位论文
- 描述：鄱阳湖越冬水鸟数量分布及4种鹤类生态习性研究
- 鄱阳湖流域史前人类遗址时空分布及其环境响应
- 作者： 徐佳佳 贾玉连 马春梅 朱诚 吴立 李育远 王鑫浩 来源：地理学报(英文版) 年份：2016 文献类型 ：期刊 关键词： expanded northward geographic records 环境响应 鄱阳湖流域 climatic ancient Holocene southeast
- 描述：The temporal-spatial geographic distribution of archaeological sites and its feature between 10.0–2.8 ka BP(ka BP= thousands of years before 0 BP, where “0 BP” is defined as the year AD 1950) were determined, based on GIS spatial analysis in the Poyang Lake Basin. The relationship between geographic distribution of sites of different periods under subsistence existence of ancient civilizations, climate and environmental change was investigated. The results revealed numerous archaeological sites of the Neolithic Age(10.0–3.6 ka BP). The sites were mainly located in the northern part of the Poyang Lake Basin, a hilly and mountainous area with many river terraces suitable for the development of human civilization. The number of archaeological sites rapidly increased during the Shang and Zhou dynasties(3.6–2.8 ka BP) and spread widely on the floodplains of the middle and lower reaches of Ganjiang River and onto the west, south, and southeast beach areas of the Poyang Lake. Holocene records of climate change suggested that it was possible that climate fluctuations had a great impact on human evolution in the study area. Before 3.6 ka BP, westward and northward expansion of Neolithic cultures in the Poyang Lake watershed occurred under the background of climate amelioration(becoming warmer and wetter). The ancient people lived in the hilly areas with high elevation. The simple mode of a fishing and gathering economy was mostly suited to this area in the early Neolithic Age. The scope of human activities was expanded and cultural diversity developed in the late Neolithic Age. However, with population growth and increasing survival pressure in a dry-cold climatic stage after 3.6 ka BP, this simple living mode had to be abandoned, and various forms of economy, the majority being agriculture, were developed on flood plains of the lower reaches of numerous rivers around Poyang Lake. This promoted flourishing of the Bronze culture of South China.
- 全文：The temporal-spatial geographic distribution of archaeological sites and its feature between 10.0–2.8 ka BP(ka BP= thousands of years before 0 BP, where “0 BP” is defined as the year AD 1950) were determined, based on GIS spatial analysis in the Poyang Lake Basin. The relationship between geographic distribution of sites of different periods under subsistence existence of ancient civilizations, climate and environmental change was investigated. The results revealed numerous archaeological sites of the Neolithic Age(10.0–3.6 ka BP). The sites were mainly located in the northern part of the Poyang Lake Basin, a hilly and mountainous area with many river terraces suitable for the development of human civilization. The number of archaeological sites rapidly increased during the Shang and Zhou dynasties(3.6–2.8 ka BP) and spread widely on the floodplains of the middle and lower reaches of Ganjiang River and onto the west, south, and southeast beach areas of the Poyang Lake. Holocene records of climate change suggested that it was possible that climate fluctuations had a great impact on human evolution in the study area. Before 3.6 ka BP, westward and northward expansion of Neolithic cultures in the Poyang Lake watershed occurred under the background of climate amelioration(becoming warmer and wetter). The ancient people lived in the hilly areas with high elevation. The simple mode of a fishing and gathering economy was mostly suited to this area in the early Neolithic Age. The scope of human activities was expanded and cultural diversity developed in the late Neolithic Age. However, with population growth and increasing survival pressure in a dry-cold climatic stage after 3.6 ka BP, this simple living mode had to be abandoned, and various forms of economy, the majority being agriculture, were developed on flood plains of the lower reaches of numerous rivers around Poyang Lake. This promoted flourishing of the Bronze culture of South China.
- 2014-2015年度环鄱阳湖地区不同场所禽流感病毒分布情况及其影响因素研究
- 作者： 严文婧 来源：中国疾病预防控制中心 年份：2016 文献类型 ：学位论文 关键词： 禽流感病毒分布 影响因素 阳性率
- 描述：的重要因素。通过此研究可以了解环鄱阳湖地区候鸟迁徙、活禽养殖、活禽贸易等重要环节涉及场所中禽流感病毒阳性率分布情况,并探究其影响因素,可以为禽流感防控提供依据。方法1.问卷调查及现场采样采用随机抽样的方法在
- 全文：的重要因素。通过此研究可以了解环鄱阳湖地区候鸟迁徙、活禽养殖、活禽贸易等重要环节涉及场所中禽流感病毒阳性率分布情况,并探究其影响因素,可以为禽流感防控提供依据。方法1.问卷调查及现场采样采用随机抽样的方法在
- 2014-2015年度环鄱阳湖地区不同场所禽流感病毒分布情况及其影响因素研究
- 作者： 严文婧 来源：中国疾病预防控制中心 年份：2016 文献类型 ：学位论文 关键词： 禽流感病毒分布 影响因素 阳性率
- 描述：的重要因素。通过此研究可以了解环鄱阳湖地区候鸟迁徙、活禽养殖、活禽贸易等重要环节涉及场所中禽流感病毒阳性率分布情况,并探究其影响因素,可以为禽流感防控提供依据。方法1.问卷调查及现场采样采用随机抽样的方法在
- 全文：的重要因素。通过此研究可以了解环鄱阳湖地区候鸟迁徙、活禽养殖、活禽贸易等重要环节涉及场所中禽流感病毒阳性率分布情况,并探究其影响因素,可以为禽流感防控提供依据。方法1.问卷调查及现场采样采用随机抽样的方法在