检索结果相关分组
- 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.
- 鄱阳湖湖泊细菌群落组成及结构——以松门山为例
- 作者： 寇文伯 黄正云 张杰 刘倩纯 刘芳鹏 刘以珍 吴兰 来源：生态学报 年份：2015 文献类型 ：期刊 关键词： 鄱阳湖 高通量测序 细菌多样性 细菌群落组成
- 描述：于2011年5月在鄱阳湖——松门山湖区采集底泥与表层水样,分别提取了表层水体浮游和底泥微生物基因组DNA,利用454高通量测序技术对细菌的16S rRNA基因进行了序列测定,分析了湖泊底泥细菌、水体浮游细菌群落结构特征。结果显示:底泥细菌OTUs(Operational Taxonomic Units)为1454,表层水体浮游细菌OTUs为269;底泥细菌群落比表层水体更加多样化,底泥细菌的物种数大大多于表层水体。同时,底泥细菌群落与表层浮游细菌群落结构存在显著差异。物种分类显示鄱阳湖底泥细菌种类隶属于20门,228属,其中优势种群为δ-变形菌纲(Deltaproteobacteria)、β-变形菌纲(Betaproteobacteria)和疣微菌门(Verrucomicrobia);表层水体浮游细菌隶属于13门116属,优势种群为β-变形菌纲、拟杆菌门(Bacteroidetes)和放线菌门(Actinobacteria)。结果进一步揭示,无论是浮游细菌群落还是沉积物细菌群落,优势细菌种群的基因型多样性更高。
- 全文：于2011年5月在鄱阳湖——松门山湖区采集底泥与表层水样,分别提取了表层水体浮游和底泥微生物基因组DNA,利用454高通量测序技术对细菌的16S rRNA基因进行了序列测定,分析了湖泊底泥细菌、水体浮游细菌群落结构特征。结果显示:底泥细菌OTUs(Operational Taxonomic Units)为1454,表层水体浮游细菌OTUs为269;底泥细菌群落比表层水体更加多样化,底泥细菌的物种数大大多于表层水体。同时,底泥细菌群落与表层浮游细菌群落结构存在显著差异。物种分类显示鄱阳湖底泥细菌种类隶属于20门,228属,其中优势种群为δ-变形菌纲(Deltaproteobacteria)、β-变形菌纲(Betaproteobacteria)和疣微菌门(Verrucomicrobia);表层水体浮游细菌隶属于13门116属,优势种群为β-变形菌纲、拟杆菌门(Bacteroidetes)和放线菌门(Actinobacteria)。结果进一步揭示,无论是浮游细菌群落还是沉积物细菌群落,优势细菌种群的基因型多样性更高。
- 鄱阳湖沙化土地生态治理技术研究与示范
- 作者： 郑林 曹昀 丁明军 胡启武 李晓峰 贾玉连 詹选怀 李海涛 梁涛 来源：中国科技成果 年份：2015 文献类型 ：期刊 关键词： 政府部门 示范 土地面积 滨湖地区 沙化治理 鄱阳湖地区 沙化土地 生态治理技术
- 描述：鄱阳湖地区作为南方沙化的典型分布区，沙化土地面积3.89万公顷，主要分布于彭泽、湖口、都昌、星子、永修、新建等滨湖地区。当前，鄱阳湖沙化正以3～5米/年的速度扩展，甚至出现了“沙进人退”的状况，严重影响了当地居民的生产和生活，已引起科研机构和政府部门的高度重视。近几十年来，一些学者就鄱阳湖沙化土地的形成演化、景观结构、植被演替等方面进行了研究，但对鄱阳湖地区沙化土地演化过程、机理以及与北方荒漠化异同等问题目前尚没有形成明确、统一的结论，在沙化治理方面尽管也开展了一些相关工作，但还未探索出适宜于本地区成熟的沙化治理技术与模式。
- 全文：鄱阳湖地区作为南方沙化的典型分布区，沙化土地面积3.89万公顷，主要分布于彭泽、湖口、都昌、星子、永修、新建等滨湖地区。当前，鄱阳湖沙化正以3～5米/年的速度扩展，甚至出现了“沙进人退”的状况，严重影响了当地居民的生产和生活，已引起科研机构和政府部门的高度重视。近几十年来，一些学者就鄱阳湖沙化土地的形成演化、景观结构、植被演替等方面进行了研究，但对鄱阳湖地区沙化土地演化过程、机理以及与北方荒漠化异同等问题目前尚没有形成明确、统一的结论，在沙化治理方面尽管也开展了一些相关工作，但还未探索出适宜于本地区成熟的沙化治理技术与模式。