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长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
作者: 于悦  来源:华中农业大学 年份:2016 文献类型 :学位论文
描述:长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
作者: 于悦  来源:华中农业大学 年份:2016 文献类型 :学位论文
描述:长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
作者: 于悦  来源:华中农业大学 年份:2016 文献类型 :学位论文
描述:长江、赣江、鄱阳湖鲢遗传多样性和群体遗传结构分析
鄱阳湖非平稳水位波动及其与长江的交互作用关系
作者: 戴雪 万荣荣 杨桂山  来源:地理学报(英文版) 年份:2015 文献类型 :期刊 关键词: Yangtze  earlier  seasonal  intensified  downstream  lacustrine  river  representative  flood  dominate 
描述:Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
全文:Seasonal water-level fluctuations(WLF) play a dominate role in lacustrine ecosystems. River-lake interaction is a direct factor in changes of seasonal lake WLF, especially for those lakes naturally connected to upstream and downstream rivers. During the past decade, the modification of WLF in the Poyang Lake(the largest freshwater lake in China) has caused intensified flood and irrigation crises, reduced water availability, compromised water quality and extensive degradation of the lake ecosystem. There has been a conjecture as to whether the modification was caused by its interactions with Yangtze River. In this study, we investigated the variations of seasonal WLF in China’s Poyang Lake by comparing the water levels during the four distinct seasons(the dry season, the rising season, the flood season, and the retreating season) before and after 2003 when the Three Gorge Dam operated. The Water Surface Slope(WSS) was used as a representative parameter to measure the changes in river-lake interaction and its impacts on seasonal WLF. The results showed that the magnitude of seasonal WLF has changed considerably since 2003; the seasonal WLF of the Poyang Lake have been significantly altered by the fact that the water levels both rise and retreat earlier in the season and lowered water levels in general. The fluctuations of river-lake interactions, in particular the changes during the retreating season, are mainly responsible for these variations in magnitude of seasonal WLF. This study demonstrates that WSS is a representative parameter to denote river-lake interactions, and the results indicate that more emphasis should be placed on the decrease of the Poyang Lake caused by the lowered water levels of the Yangtze River, especially in the retreating season.
洞庭湖、鄱阳湖白豚和长江江豚的生态学研究
作者: 杨健 肖文 匡新安 魏卓 刘仁俊  来源:长江流域资源与环境(学报) 年份:2000 文献类型 :期刊
描述:洞庭湖、鄱阳湖白豚和长江江豚的生态学研究
农业部长江流域渔政监督管理办公室韩旭副主任到鄱阳湖渔业研究中心考察指导
作者:暂无 来源:江西水产科技 年份:2015 文献类型 :期刊 关键词: 副主任  监督管理  渔政  办公室  农业部  鄱阳湖  长江流域  渔业 
描述:9月25日,农业部长江流域渔政监督管理办公室韩旭副主任一行,在江西省农业厅张跃远副巡视员、省鄱阳湖渔政局主要负责同志陪同下,到江西省水产科学研究所所外基地(鄱阳湖渔业研究中心)考察。省水科所主要负责人向韩旭副主任一行详细汇报了鄱阳湖渔业研究中心基地建设、功能定位和科研工作情况,以及下一步工作打算。
全文:9月25日,农业部长江流域渔政监督管理办公室韩旭副主任一行,在江西省农业厅张跃远副巡视员、省鄱阳湖渔政局主要负责同志陪同下,到江西省水产科学研究所所外基地(鄱阳湖渔业研究中心)考察。省水科所主要负责人向韩旭副主任一行详细汇报了鄱阳湖渔业研究中心基地建设、功能定位和科研工作情况,以及下一步工作打算。
农业部长江流域渔政监督管理办公室主任李彦亮一行考察鄱阳湖渔业研究中心
作者:暂无 来源:江西水产科技 年份:2015 文献类型 :期刊 关键词: 文宣  研究中心  总经济师  长江流域  中心基地  水产科学  功能定位 
描述:3月3日下午,农业部长江流域渔政监督管理办公室主任李彦亮、中国科学院水生生物研究所曹文宣院士一行,在江西省农业厅张跃远副巡视员,江西省渔业局、江西省渔政局、江西省水产科学研究所等单位主要负责同志陪同
全文:3月3日下午,农业部长江流域渔政监督管理办公室主任李彦亮、中国科学院水生生物研究所曹文宣院士一行,在江西省农业厅张跃远副巡视员,江西省渔业局、江西省渔政局、江西省水产科学研究所等单位主要负责同志陪同
蔓荆在鄱阳湖风沙区的适应性及防风作用研究
作者: 杨洁 左长清  来源:水土保持研究 年份:2004 文献类型 :期刊 关键词: 蔓荆  防风作用  风沙化土地 
描述: cm高度的风速分别降低33.7%和18%;覆盖度为30%时,起沙风速增幅达54%;风沙流结构明显改变,贴地层沙量显著增加,使大部分沙粒沉降于地表,减少了沙丘的前移速度;蔓荆可广泛用作于我国南方江、河、湖滨沿岸以及海岸线的防风固沙植物.
全文: cm高度的风速分别降低33.7%和18%;覆盖度为30%时,起沙风速增幅达54%;风沙流结构明显改变,贴地层沙量显著增加,使大部分沙粒沉降于地表,减少了沙丘的前移速度;蔓荆可广泛用作于我国南方江、河、湖滨沿岸以及海岸线的防风固沙植物.
鄱阳湖桡足类的群落组成与现存量季节变化的初步研究
作者: 谢钦铭 李长春  来源:江西科学 年份:1998 文献类型 :期刊 关键词: 桡足类  季节变动  生物量  优势种  群落 
描述:;并据出现的区域,归成沿岸型,敞水型和广布型。年数量变动曲线与生物量变动曲线有春、夏和秋季三次高峰。秋季高峰比春,夏季高峰更突出,持续时间约两个月,但生物量与数量三次高峰出现的时间并不完全一致。笔者还初
全文:;并据出现的区域,归成沿岸型,敞水型和广布型。年数量变动曲线与生物量变动曲线有春、夏和秋季三次高峰。秋季高峰比春,夏季高峰更突出,持续时间约两个月,但生物量与数量三次高峰出现的时间并不完全一致。笔者还初
鄱阳湖桡足类的群落组成与现存量季节变动的初步研究
作者: 谢钦铭 李长春  来源:江西科学 年份:1998 文献类型 :期刊 关键词: 桡足类  生物量  优势种  鄱阳湖 
描述:;并据出现的区域,归成沿岸型、敞水型和广布型。年数量变动曲线与生物量变动曲线有春、夏和秋季三次高峰。秋季高峰比春、夏季高峰更突出,持续时间约两个月,但生物量与数量三次高峰出现的时间并不完全一致。笔者还初步讨论了影响桡足类群落的生态因子。
全文:;并据出现的区域,归成沿岸型、敞水型和广布型。年数量变动曲线与生物量变动曲线有春、夏和秋季三次高峰。秋季高峰比春、夏季高峰更突出,持续时间约两个月,但生物量与数量三次高峰出现的时间并不完全一致。笔者还初步讨论了影响桡足类群落的生态因子。
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