为了优化山东半岛近海长牡蛎秋冬季育肥养殖的空间格局,本研究采用卫星遥感获取的海水表层温度、叶绿素a浓度和悬浮颗粒物浓度数据,以及海水表面高度再分析数据,基于动态能量收支(Dynamic Energy Budget,DEB)理论,构建了山东半岛长牡蛎...为了优化山东半岛近海长牡蛎秋冬季育肥养殖的空间格局,本研究采用卫星遥感获取的海水表层温度、叶绿素a浓度和悬浮颗粒物浓度数据,以及海水表面高度再分析数据,基于动态能量收支(Dynamic Energy Budget,DEB)理论,构建了山东半岛长牡蛎秋冬季育肥养殖适宜性评价模型,通过对山东半岛海域长牡蛎养殖适宜性指数的时空变动分析发现,适宜性呈现南部海域>北部海域>东部海域>西部海域的趋势,其中南部海域非常适宜的区域面积占比最大,为9.1%,主要分布在乳山地区;山东半岛西部黄河口周边海域存在大面积的不适宜养殖区域,占比高达该海域的30.5%。长牡蛎秋冬季育肥养殖的非常适宜区域在2017年和2019年分别占总近海面积的38.2%和57.9%,显著高于其余年份。通过实地验证发现,山东长牡蛎的秋冬季育肥养殖最适宜海区具备水体浑浊度较低、叶绿素浓度较高、温度较暖且风浪较小的特征。本研究结果可以为山东半岛长牡蛎养殖规划提供有效的量化依据和理论基础。展开更多
The shallow lake wetlands in the middle and lower Yangtze River floodplain are important wintering and stopover habitats for migratory waterbirds on the East Asia-Australia Flyway.With increasing fishery practices in ...The shallow lake wetlands in the middle and lower Yangtze River floodplain are important wintering and stopover habitats for migratory waterbirds on the East Asia-Australia Flyway.With increasing fishery practices in recent years,however,the wetlands have deteriorated significantly and now threaten wintering waterbirds.To gain insight into the influence of deteriorating wetlands on waterbirds,we conducted a survey of wintering waterbird species,population size,and distribution across 11 belt transects in Caizi Lake and Shengjin Lake,two shallow lakes along the Yangtze River in Anhui Province from November 2007-April 2008 and from November 2008-April 2009,respectively.The impacts of different fishery patterns on the distribution of waterbirds were also analyzed.A total of 43 waterbirds species belong to 7 orders of 12 families were counted during the surveys,of which 38 were found in Caizi Lake with a density of 8.2 ind./hm2,and 42 in Shengjin Lake with a density of 3.5 ind./hm2.Geese（Anser cygnoides）,bean geese（Anser fabalis）,tundra swan（Cygnus columbianus）,and dunlin（Calidris alpina） were the dominant species in the two shallow lakes.Species number and individual assemble reached maximum at the end of December and in early January of the following year,without coincidence of the largest flock for different ecological groups.Based on waterbird diversity across the 11 belt transects and the fishery patterns,habitats could be divided into three groups.Gruiformes,Anseriformes and Charadriiformes had relatively higher densities in the natural fishery zones and lower densities in the cage fishery zones;whereas,the density of Ardeidae showed little change across all lake zones.It is important to develop sustainable fishery patterns in shallow lakes along the middle and lower Yangtze River floodplain to better protect resources of wintering waterbirds.展开更多
文摘为了优化山东半岛近海长牡蛎秋冬季育肥养殖的空间格局,本研究采用卫星遥感获取的海水表层温度、叶绿素a浓度和悬浮颗粒物浓度数据,以及海水表面高度再分析数据,基于动态能量收支(Dynamic Energy Budget,DEB)理论,构建了山东半岛长牡蛎秋冬季育肥养殖适宜性评价模型,通过对山东半岛海域长牡蛎养殖适宜性指数的时空变动分析发现,适宜性呈现南部海域>北部海域>东部海域>西部海域的趋势,其中南部海域非常适宜的区域面积占比最大,为9.1%,主要分布在乳山地区;山东半岛西部黄河口周边海域存在大面积的不适宜养殖区域,占比高达该海域的30.5%。长牡蛎秋冬季育肥养殖的非常适宜区域在2017年和2019年分别占总近海面积的38.2%和57.9%,显著高于其余年份。通过实地验证发现,山东长牡蛎的秋冬季育肥养殖最适宜海区具备水体浑浊度较低、叶绿素浓度较高、温度较暖且风浪较小的特征。本研究结果可以为山东半岛长牡蛎养殖规划提供有效的量化依据和理论基础。
基金Supported partly by the National Natural Science Foundation of China(30870317)EU-China Biodiversity Programme(00056783)Anhui Academic and Technical Leader Fund
文摘The shallow lake wetlands in the middle and lower Yangtze River floodplain are important wintering and stopover habitats for migratory waterbirds on the East Asia-Australia Flyway.With increasing fishery practices in recent years,however,the wetlands have deteriorated significantly and now threaten wintering waterbirds.To gain insight into the influence of deteriorating wetlands on waterbirds,we conducted a survey of wintering waterbird species,population size,and distribution across 11 belt transects in Caizi Lake and Shengjin Lake,two shallow lakes along the Yangtze River in Anhui Province from November 2007-April 2008 and from November 2008-April 2009,respectively.The impacts of different fishery patterns on the distribution of waterbirds were also analyzed.A total of 43 waterbirds species belong to 7 orders of 12 families were counted during the surveys,of which 38 were found in Caizi Lake with a density of 8.2 ind./hm2,and 42 in Shengjin Lake with a density of 3.5 ind./hm2.Geese（Anser cygnoides）,bean geese（Anser fabalis）,tundra swan（Cygnus columbianus）,and dunlin（Calidris alpina） were the dominant species in the two shallow lakes.Species number and individual assemble reached maximum at the end of December and in early January of the following year,without coincidence of the largest flock for different ecological groups.Based on waterbird diversity across the 11 belt transects and the fishery patterns,habitats could be divided into three groups.Gruiformes,Anseriformes and Charadriiformes had relatively higher densities in the natural fishery zones and lower densities in the cage fishery zones;whereas,the density of Ardeidae showed little change across all lake zones.It is important to develop sustainable fishery patterns in shallow lakes along the middle and lower Yangtze River floodplain to better protect resources of wintering waterbirds.
