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排序方式: 共有80条查询结果,搜索用时 421 毫秒
11.
1997-2008年对福州滨海湿地水鸟进行了调查,记录到水鸟共132种,隶属9目21科,以鸻鹬类和雁鸭类为主,居留型以冬候鸟和旅鸟为主;拥有多种珍稀濒危水鸟,属于国家重点保护野生动物(1988)有15种、IUCN名录的有16种、中国濒危动物红皮书名录有16种。水鸟主要分布在闽江河口、福清兴化湾、福清湾、文武砂、罗源湾。同时针对福州滨海湿地水鸟情况提出了相应的保护对策。 相似文献
12.
Light-induced bird strikes are known to occur when vessels navigate during darkness in icy waters using powerful searchlight. In Southwest Greenland, which is important internationally for wintering seabirds, we collected reports of incidents of bird strikes over 2-3 winters (2006-2009) from navy vessels, cargo vessels and trawlers (total n = 19). Forty-one incidents were reported: mainly close to land (<4 km, 78%), but one as far offshore as 205 km. Up to 88 birds were reported killed in a single incident. All occurred between 5 p.m. and 6 a.m. and significantly more birds were involved when visibility was poor (snow) rather than moderate or good. Among five seabird species reported, the common eider (Somateria mollissima) accounted for 95% of the bird casualties. Based on spatial analyses of data on vessel traffic intensity and common eider density we are able to predict areas with high risk of bird strikes in Southwest Greenland. 相似文献
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Yuong-Nam Lee 《Cretaceous Research》1997,18(6):849-864
The ichnofauna of the Woodbine Formation (Cenomanian), Denton County, Texas includes bird and dinosaur tracks. A new bird trackway,Magnoavipes loweiichnogen. et ichnosp. nov., appears to represent the largest bird tracks known from the Mesozoic. A theropod trackway,Fuscinapedis woodbinensisichnogen. et ichnosp. nov., is characterized by long digits of uniform width and pointed small claws. Six hadrosaurid trackways,Caririchnium protohadrosaurichnosichnosp. nov., are the oldest hadrosaurid tracks associated with skeletal elements. They include one isolated small footprint, a medium sized quadrupedal, and five large bipedal hadrosaurid trackways. 相似文献
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王直军 《中国地理科学(英文版)》1999,(2)
1GENERALSITUATIONOFTHESTUDIEDAREA1.1NaturalEnvironmentThestudywasconductedintheJinuoMountain(20°53′11″-22°9′59″N,100°55′33″-1... 相似文献
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Mecislovas Zalakevicius 《GeoJournal》2002,57(3):183-193
This paper presents data obtained from studies of the dependence of different migratory processes - spring arrival, migratory
take-off, spring and autumn en route migration–upon climate change in Lithuania. The article confirms the impact of global
climate warming on different breeding bird species and populations, changes in their ranges and population state, and their
staging and wintering areas. The list of bird species which are shifting their ranges north-eastward or eastward in the Baltic
region under the influence of global warming is presented. It was established that the impact of global climate change upon
birds of terrestrial and wetland complexes is more evident than upon waterfowl. Attention is focussed on the practical importance
of the global climate change impact on environmental protection and different branches of the economy.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
18.
在美国,孤立湿地与可通航水域没有水文联系,被认为不属于《清洁水法》中的“水域”,联邦无权管辖。为此,陆军工程兵团制定“候鸟规则”,作为对孤立湿地行使管辖权的依据。美国“孤立湿地”保护中的“候鸟规则”对我国的启示在于:(1)应从水文学角度界定孤立湿地,孤立湿地是指与其它水体缺乏联系、相对孤立的湿地,这更符合我国湿地政策的现状;(2)人工“孤立湿地”受保护,除了需满足一定的水文条件,还须是野生动物事实上的栖息地,不应限于建立“栖息地档案”意义下的野生动物栖息地或纳入野生动物重要栖息地名录的栖息地;(3)孤立的人工湿地如果是国家重点保护野生动物栖息地,其管辖权应由中央行使;(4)国家重点保护野生动物栖息地外的其他孤立湿地,面积达到35 hm2以上,也应由中央管辖。 相似文献
19.
2016年9月至2017年4月,采用样线法和可变大小样方法相结合,对七里海潟湖湿地非繁殖期鸟类进行了调查研究。调查共记录到鸟类13目27科60种,其中雀形目鸟类10科14种,占物种总数量的23. 33%;非雀形目鸟类17科46种,占物种总数量的76. 67%。湿地水鸟数量占全部鸟类总数量的95. 11%,水鸟类群主要为鸥类、雁鸭类、鸻鹬类和鹭类。鸟类居留类型主要为旅鸟和夏候鸟,分别占物种总数量的35. 00%和33. 33%。鸟类区系方面,以古北界鸟类和广布种鸟类为主,分别占物种总数量的63. 33%和26. 67%。经统计,鸟类多样性指数、均匀度指数和丰富度指数的平均值分别是1. 86、0. 39和2. 31。七里海潟湖湿地位于东亚—澳大利西亚迁徙路线上,是重要的鸟类迁徙停歇地和觅食地,鸟类尤其是水鸟资源丰富,应当受到关注和保护。 相似文献
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