Results 61 to 70 of about 692,878 (184)
, 1988 黔东南地区的鱼类区系组成在探讨某些云贵高原鱼类的地理分布特征上，具有较特殊的意义。作者于1937年4 ～ 6月，对黔东南地区的鱼类区系作了为期3个月的考察，采获鱼类106种，其中包括5个新种：荔波盲条鳅Noemacheilus liboensis、大鳞金线鲃Sinocyclocheilus macrolepis、长须金线鲃Sinocyclocheilus longibarbatus、小口华缨鱼Sinecrossocheilus microstomatus、中间爬岩鳅Beaufortia ...
王大忠
core
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, EarlyView.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
, 2014 不同的自然、历史条件与社会经济背景使得区域旅游系统空间结构各不相同.借助旅游经济模型讨论了区域之间的旅游经济联系强度和旅游经济联系隶属度.研究表明,新疆各地区之间的旅游经济联系很不均衡,乌鲁木齐和昌吉地区构成强联系区,其它地区和城市构成一般联系区;强联系区的容量维和信息维均小于一般联系区,表明旅游景区数量在各地区间的分布变差相对较小,景区分布相对较均衡;一般关联区旅游景区系统的容量维和信息维数值偏大,说明旅游景区数量在各地区间的分布变差相对较大 ...
杨兆萍 +11 more
core
Changes in the transformative potential of action proposals in Finnish Red Lists from 1986 to 2019
Conservation Biology, EarlyView.Abstract Red lists provide critical knowledge regarding biodiversity decline, especially in Finland, where broad assessments have been made regularly since the 1980s. They deliver information on the threat status of species and ecosystems, propose actions to guide conservation policy, and have the potential to spur transformative change.
Anni Arponen +4 more
wiley +1 more source
面向工程应用的先进绝热压缩空气储能模型及先进㶲分析 [PDF]
全球能源互联网先进绝热压缩空气储能（advanced adiabatic compressed air energy storage system，AA-CAES）仿真建模及分析是其工程实践的基础。然而，目前模型一般基于理想工况建立，分析结果与实际工况相偏差较大，无法指导工程应用。为此，在传统热力学模型基础上，考虑了空气流动阻力损失和能量转换设备损耗等因素，建立了面向工程应用的AA-CAES模型并以200 MW盐穴AA-CAES系统为例进行了分析。同时，对系统效率分析方法进行改进并对其进行了先进分析。结果表明 ...
王国华, 梅生伟, 张通, 陈来军
doaj +1 more source
, 1996 赣东北地区共有鱼类１３５种和亚种，隶属于１０目２２科８０属。其中纯淡水鱼类１２８种和亚种，占总数的９４．８％。鲤形目是最主要鱼类群，有９５种和亚种，占纯淡水鱼类的７４．２％。鲤科鱼类最丰富，有８０种和亚种，占纯淡水鱼类的６２．５％。此地区鱼类区系以东亚特有的江河平原鱼类为其主要组成成分，此外，既有老第三纪原始类群的后裔种类，又有南亚暖水性类群鱼类，而且全北区冷水性类群鱼类也分布于此。与邻近水系比较，此地区与赣江水系、钱塘江水系和湘江水系的鱼类区系无显著差异 ...
张鹗,刘焕章,何长才
core
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
, 1997 本文依据赣东北鱼类区系的特征，结合古地史资料，从历史时空的角度分析其区系的形成和演化；进而对我国东部地区淡水鱼类动物地理区划进行了讨论并指出：赣东北以及整个长江中下游地区应隶属于东洋区；南岭──武夷山──天台山──仙霞岭可构成东洋区南东亚亚区内次一级地理区划的分界线，即华东小区和华南小区的分界线；洞庭湖水系、鄱阳湖水系和钱塘江水系应享有相同的区划级别 ...
张鹗,陈宜瑜
core
Twelve principles for successful governance of community‐based coastal marine restoration
Conservation Biology, EarlyView.Abstract Global agreements, such as the Global Biodiversity Framework, call for urgent, large‐scale action to halt biodiversity loss through a whole‐of‐society approach. Community‐based restoration can play a crucial role in achieving this goal, yet there remains limited understanding of what makes these projects effective and sustainable.
Michelle M. Holian +2 more
wiley +1 more source
, 2008 对贵州红水河谷地区的500余号苔藓植物标本进行了调查、采集和分类鉴定,得到苔藓植物36科,78属,204种(包括8亚种4变种和1变型)。其中藓类植物23科60属163种,苔类植物13科18属41种。为贵州增加新记录5种。划为13种类型。其中具热带性质的区系成分最丰富,占总数的38.02%,构成该区苔藓植物区系成分的主体;具温带性质的成分占总数的33.85%;东亚成分、特有成分、东亚-北美成分占该区的1.56%。选择9个地区,通过属和种的相似性系数全面比较 ...
熊源新, 闫晓丽
core