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黄河三角洲是大鸨的一个重要越冬栖息地,调查结果显示,从1997年到2006年在黄河三角洲越冬的大鸨数量总体上在减少,甚至在某一年度(2001)仅观察到8只大鸨。草地开垦、农田耕作类型改变、农药使用及人为活动干扰可能是造成黄河三角洲大鸨越冬数量减少的主要原因。在未来保护行动中我们应加强大鸨数量动态监测和越冬栖息地选择研究的开展,实施越冬地保护措施,吸引社区参与管理,保护大鸨及其生存环境。 相似文献
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黄河三角洲大鸨越冬数量变化及其面临的威胁 总被引：1，自引：0，他引：1
黄河三角洲是大鸨重要的越冬地,越冬数量曾达到500只,草地、农田和稀疏芦苇地是其主要越冬生境,近几年随着农业开发,草地被开垦,农田耕作方式发生变化,大鸨越冬数量锐减。在1997年至2009年连续12年野外监测中,仅有6年有野外记录,分别为135只(1997)、14只(1999)、8只(2001)、21只(2002)、41只(2006)、9只(2009),大鸨越冬地面临的主要问题是草地开垦、农田耕作类型改变、农药使用及人为活动干扰,在未来保护行动中应加强大鸨数量动态监测,开展越冬栖息地选择研究,实施越冬地保护措施,吸引社区参与管理,保护大鸨及其生存环境。 相似文献
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耿国彪 《绿色中国(A版)》2021,(3):18-27
黄河宁夏段是春秋季候鸟迁徙的重要通道,石嘴山市黄河湿地是中国灰鹤种群重要的越冬栖息地,也是国家一级保护野生动物大鸨、黑鹳、白尾海雕,以及国家二级保护野生动物大小天鹅、白琵鹭等重要的越冬地。刚刚进入冬日,石嘴山市爱鸟协会各个小分队的队员们就开始行动起来。 相似文献
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2011年冬鄱阳湖水鸟数量与分布调查 总被引：2，自引：0，他引：2
鄱阳湖目前是我国最大的淡水湖,是长江中下游地区乃至东亚地区最大和最重要的候鸟越冬地,每年在鄱阳湖越冬的水鸟总数在50万只以上,同时鄱阳湖还是部分全球珍稀濒危物种十分重要的越冬地。坚持开展鄱阳湖越冬水鸟的种群数量调查,对于掌握长江流域乃至全球水鸟种群动态十分重要。2011年冬在鄱阳湖开展了越冬水鸟调查,共记录到越冬水鸟51种59万余只,其中有14个种达到了全球种群数量1%的标准,同时鸿雁、白鹤、东方白鹳的数量超过全球种群数量的估计值。 相似文献
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Six ultimate factors (forage abundance, horizontal sheltering class, distance from human disturbance, snow depth, tree coverage,
and edge effect) of Red deer (Cervus elaphus) were investigated in eastern Heilongjiang Province during winter from 1988 to 1991. On the basis of analysis of field data,
we evaluated winter habitat conditions of Red deer. The results showed as follows: the wintering habitat quality of Red deer
in poplar-birch stands was excellent in the Wanda Mountains, and was moderate in shrub-woods and Korean pine seed stands.
According to habitat index (HI) values, the habitat quality in poplar-birch stands (HI=0.8185) was superior to that in shrub-woods
(HI=0.4825) and in Korean pine seed stands (HI=0.4385). The wintering habitat quality of Red deer in the Wanda Mountains was
superior to that of Dailing Forestry Region. According to the current situations of forestry areas in northeastern China,
strengthening habitat management was important for the conservation and management of Red deer population in the next decades.
This subject is supported by the Natural Science Foundation of Heilongjiang Province.
(Responsible Editor: Zhu Hong) 相似文献
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于2003、2004和2005年连续3年对黑脸琵鹭在海南岛已知和潜在的越冬地进行调查.分别在东寨港自然保护区、临高县后水湾和东方市北黎湾发现了黑脸琵鹭的越冬种群,后两者是在海南岛首次记录到.2005年海南岛黑脸琵鹭的越冬种群数量已达77只,约占全球越冬种群数量的5%以上,这是继香港和台湾等地之后黑脸琵鹭在中国的又一重要越冬地.调查结果表明:黑脸琵鹭越冬栖息地所面临的主要威胁是湿地滩涂的围垦、海产品挖采和非法猎捕.建议有关职能部门采取有效措施,分别在2个新发现地建立保护机构,并对越冬地周围的村民进行保护意识教育和宣传,以加强黑脸琵鹭及其栖息地的保护与管理. 相似文献
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IntroductionTheprofessionalsworkofwildlifemanagementisatargetforpopulationmanagement,butmoreandmoreprofessionalsworkersareinterestedinthemanagementofthewildlifehabitat(Belley,1984).ItisoneofessentiafworksforustoappraisehabitatwiththescientificmanagementontheReddeerpopulation.Soitisusefultoconservation,developmentandutilizationoftheReddeerinananimal'sperspective.Sincethe1970'smanyscientistshavebeenstudyingthehabitatevaluationfordeer.Severalmodelsandmethodssuchasthelineardiagram,thematrixmodel… 相似文献
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以日本厚朴引种实生苗为试材,综合引种过程中日本厚朴的越冬表现,分析不同越冬防护措施与植株冻伤率、生长状况之间的关系,探讨沈阳地区引种日本厚朴栽培的最佳方式和越冬防寒措施,制定适宜的栽培管理方法,解决日本厚朴在北方地区自然条件下安全越冬的问题. 相似文献
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蜀柏毒蛾自然种群生命表研究初报 总被引：2，自引：2，他引：0
1990年～1991年在中江县柏木林区对蜀柏毒蛾自然种群生命在进行了系统观测,组建了3个生命表。蜀柏毒蛾自然种群生存曲线属Southwood N型,卵期和低龄幼虫期死亡率很高,主要消亡因子是卵寄生蜂、越冬卵不育、初孵幼虫的生理死亡及雨水的作用。1990、1991年第1代种群增长指数为0.9066。0.2063,下代种群均呈下降趋势,而1990年越冬代种群增长指数为12.1732,下代种群呈上升趋势。天敌的控制作用表现在中老龄幼虫以及蛹期,且随着虫龄的增大而越加显著。因此采取化学防治方法控制虫灾时,宜在低龄幼虫期进行。 相似文献
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Boreal forest ecosystems are generally highly sensitive to logging and other forestry activities. Thus, commercial forestry has had major effects on the forests and landscape structure in northern Sweden since the middle of the 19th Century, when it rapidly extended across the region. Lichens (which constitute up to 80% of reindeer forage in winter and early spring) have often been amongst the most severely affected ecosystem components. The overall aim of the present study was to analyze how forestry has influenced the potential supply of ground-growing lichens as winter forage for the reindeer in this region over the past ca. 100 years. For this purpose, we analysed changes in forest and stand structure in Scots pine-dominated (Pinus sylvestris L.) reindeer wintering areas in the southern part of the county Norrbotten (covering ca. 58,000 ha) using detailed historical forest inventories and management plans. We found that the amount of the forest types considered potentially good pasture (mainly middle-aged and old pine forests) decreased during the first part of the 20th Century. However, the quality of grazing grounds was improved by forestry during this time mainly because selective logging made the forests more open which benefits lichen growth. During the last part of the 20th century forestry impaired the quality of grazing grounds in several ways, e.g. by clear-cutting and intensified use of various silvicultural measures. We conclude that ca. 30–50% of the winter grazing grounds have been lost in the study area because of intensive forest management during the last century. The spatially precise historical information about the affects of forestry on lichen pasture provided in this study can be used to direct forest management which will facilitate and promote reindeer herding in the future. 相似文献
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Yuan Li Li Xiaomin Yu Hongxian Guo Libin Zhang Taizhong Gao Qingjun Zeng Daihua 《林业研究》1997,8(4):235-239
There are five species of swan in the world. Three of them were recorded in China. They are whooper swan (Cygnus cygnus), whistling swan (Cygnus columbianus) and mute swan (Cygnus olor). Among them. whooper swan is the most famous in China. Whooper swan is a resident bird in China. They breed in Xinjiang
Ugyur Autonomous Region. Inner Mongol Autonomous Region. Heilongjiang Province. etc., and winter in Qinghai. Shandong. Henan
Province, etc, and the lower reaches of the Changjiang River. The total number in China is about 5.000 in breeding grounds
and 15.000 in wintering grounds. Higher number were found in 1960s. Because of the changes in environment and hunting, of
picking up eggs and of catching nestlings, their population is being reduced rapidly. They are in danger now. In order to
protect the whooper swans, some protection measures must be taken, such as strengthening public education and scientific research,
estabilshing a base of raising and breeding: developing international cooperation, strengthening the construction of natural
reserves in the breeding and wintering grounds. Up to the end of 1993. 34 natural reserves have been established in China.
(Responsible Editor: Sun Yueqi) 相似文献
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北京市越冬长耳鸮食物中的蝙蝠成分 总被引：1，自引：0，他引：1
为研究越冬长耳鸮对冬眠蝙蝠的捕食影响,2003—2005年采用食团分析法对北京市2个长耳鸮群体食物中的蝙蝠成分进行比较研究。结果表明,在2个长耳鸮群体食团中均鉴别出大棕蝠、山蝠、普通伏翼和东方蝙蝠4种蝙蝠,普通伏翼为主要猎物,但2个群体被捕食蝙蝠的数量组成存在明显差异。在不同年度和越冬阶段,2个群体对蝙蝠的捕食强度均为普通伏翼最高、大棕蝠和山蝠占据较小比例,2个群体各年度捕食蝙蝠的组成以及城外群体不同越冬期捕食蝙蝠的组成存在明显差异。2005/2006年度,2个群体普通伏翼被捕食强度均明显下降。长耳鸮的捕食可能给北京地区蝙蝠类群生存带来负面影响,建议适当采取措施控制长耳鸮的捕食。 相似文献