共查询到20条相似文献，搜索用时 250 毫秒
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金碧镇经济来源以农业、养殖业、林副产品为主。全镇国土总面积454．5km^2,总耕地面积3721．27hm^2,其中林业用地29967hm^2,国有林面积206hm^2,集体林面积29761hm^2。《天然林保护工程云南省大姚县实施方案》规划管护面积17087．8hm^2,我镇养羊业具有悠久的历史,养羊业产值在畜牧业产值中逐年有所提高,十二五区间,出栏率每年将以5％以上的速度递增。 相似文献
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公主岭市位于松辽平原中部,土地肥沃,幅员面积4058km^2,耕地面积22万hm^2,草原面积2000hm^2。辖29个乡镇,6个街道办事处。全市总人口103万,总户数28．4万户,其中农业人口67．6万,农业户数16．1万。 相似文献
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据青海省农牧厅消息，青海省草场荒漠化面积已达33．4万km^2，占草场总面积的46％；中度以上退化面积达733万hm^2，占草地总面积的18．15％，严重退化面积达440万hm^2，占草场总面积的10．9％，另有一定数量的沙化草场存在。对此，省农牧厅有关人士分析认为，青海省遏制环境恶化，保护自然生态链完整的任务相当艰巨。 相似文献
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据陕西省山川秀美办公室统计，自1999年国家实施西部大开发战略5年来，陕西省水土保持生态建设共投资近10亿元，治理水土流失面积3．33万km^2；年均拦蓄泥沙1．3亿t，居黄河流域各省之首；完成退耕还林155．6万hm^2，位居全国第一。目前，全省共落实森林管护面积733．33万hm^2；林草覆盖率由1997年的38．2％提到45％。 相似文献
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陕西长青自然保护区 总被引：1，自引：0，他引：1
自然概况陕西长青自然保护区(107°17′~107°55′E,33°17′~33°44′N)1995年12月经国务院批准建立国家级自然保护区,位于秦岭中段南坡陕西省洋县境内,是以保护大熊猫及其栖息地生物多样性为主的森林野生动物类型保护区,总面积29906hm~2.主要保护对象有大熊猫(Ailuropodamelanoleuca)、金丝猴(Rhinopithecusroxllanae)、羚羊(Budorcas taxicolor)、金雕(Apuila chrysaetos)、领春木(EupteleaPleiospermum)、银杏(Cinkgo biloba)等珍稀野生动植物. 相似文献
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西部大开发对四川大熊猫栖息地的影响 总被引：1，自引：0，他引：1
实施西部开发战略是中国政府加快我国中西部地区社会经济发展的重大决策，是中国现代化战略的重要组成部分。作为西部具有重要战略地位和影响的四川将在西部开发中扮演重要角色，同时四川是国宝大熊猫的故乡，是国家林业局实施大熊猫保护工程的重要省份。中国８５％的熊猫生活在四川西部的崇山峻岭之中，国家林业局与四川省各级政府先后建立了２７处保护大熊猫栖息地和野外种群的自然保护区，总面积１．４万多平方公里。在四川西部开发战略中大熊猫栖息地所在区域又是四川省实施战略的重要场所，在十五期间将有总额近２００亿美元的项目在大… 相似文献
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一部以大熊猫生态走廊为题材，全面记录野生大熊猫生态及栖息地；以熊猫栖息区内人民与熊猫的和谐相处以及大熊猫生态走廊的美丽风光和珍稀动植物生态为主题的大型风光纪录片，经日本ＮＨＫ摄制组为期３８天的艰辛工作，在四川宝兴摄制完成。 拍摄点·选定宝兴晓碛 人们热爱大熊猫，是因为它是几百万年前保存下来的唯一物种，也是因为大熊猫数量稀少（全世界只有中国现存数量１０００多只），更是因为它的形象和很多生活秘密不被人们所了解。到目前，还没有一部完整记录野生大熊猫生活的纪录片。日本ＮＨＫ为了拍摄一部真实纪录野生大熊猫的… 相似文献
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Understanding habitat requirements and identifying landscape linkages are essential for the survival of isolated populations of endangered species. Currently, some of the giant panda populations are isolated, which threatens their long-term survival, particularly in the Xiaoxiangling mountains. In the present study, we quantified niche requirements and then identified potential linkages of giant panda subpopulations in the most isolated region, using ecological niche factor analysis and a least-cost path model. Giant pandas preferred habitat with conifer forest and gentle slopes (>20 to ≤30°). Based on spatial distribution of suitable habitat, linkages were identified for the Yele subpopulation to 4 other subpopulations (Liziping, Matou, Xinmin and Wanba). Their lengths ranged from 15 to 54 km. The accumulated cost ranged from 693 to 3166 and conifer forest covered over 31%. However, a variety of features (e.g. major roads, human settlements and large unforested areas) might act as barriers along the linkages for giant panda dispersal. Our analysis quantified giant panda subpopulation connectivity to ensure long-term survival. 相似文献
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The giant panda faces severe threats from habitat fragmentation and isolation. Currently, giant panda populations have been fragmented into 30 habitat patches. The disappearance of isolated small populations and studies on the genetic diversity of various populations have shown that small isolated panda populations are at a high risk of dying out completely. Habitat fragmentation has seriously impaired the ability of the giant panda to resist climate changes and other natural disasters, such as large‐scale, synchronous bamboo blooming. The Min Mountains have the largest population of pandas in China, numbering 581 individuals and accounting for 52% of the total (1114) in China. Geographic isolation means that giant pandas in the Min Mountains are divided into two populations (population A in the north and population B in the south). Population B, which had only 42 individuals in 1989, is severely threatened by high‐density human populations and the loss of genetic diversity. However, we have identified an important corridor connecting the two populations. This paper explains the importance and the feasibility of reestablishing this corridor. Due to the special geographic locations of these two populations (two rivers block the migration of giant pandas between south and north), the corridor is the only passage for giant pandas in the region. Recent studies have also shown an increase of giant panda activity in the area of the corridor. However, vegetation in the corridor has been severely degraded. Bamboo forest must be restored in this area to provide food for the pandas during migration. The effects of human activities must be reduced in order to maintain panda habitat. We believe that a restored corridor will be of great benefit to the survival of giant pandas in the Min Mountains, especially for population B. Successful re‐establishment of a corridor will be a valuable model for corridor construction in the future. 相似文献
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本文通过潘文石对22只秦岭大熊猫的家域观察资料为基础，获得生态年龄段和家域对数转换值等次生数据，并以次生数据为基础，对不同生态年龄段和不同季节大熊猫的家域和个体季节性迁移面积的动态特征进行定性比较分析，通过季节、性别和年龄对秦岭大熊猫种群家域动态的影响机制进行了探讨，结果发现以下新细节：（1）虽然在同一季节，大熊猫家域面积随着年龄的增长逐渐增加，但雌性个体家域面积增加不大，雄性个体也仅在夏季家域面积增加极大，秋冬季增加也不大；（2）同一生态年龄段，秦岭大熊猫家域面积：全年〉秋冬季〉夏季；（3）只是成体雄性大熊猫家域面积极显著大于雌性，但亚成体和老年个体家域面积的性别间差异不显著；（4）1～11岁，大熊猫迁移面积小且稳定，大于11．5岁后，迁移面积明显跃迂增大，保持增大趋势，但波动强度由强变弱。这表明秦岭大熊猫家域的季节、性别和年龄效应动态规律性明显。 相似文献
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Ronald R. SWAISGOOD Fuwen WEI William J. MCSHEA David E. WILDT Andrew J. KOUBA Zejun ZHANG 《Integrative zoology》2011,6(3):290-296
The giant panda (Ailuropoda melanoleuca David, 1869) is an iconic species for global conservation, yet field research has only recently advanced to the point where adaptive management is possible. Here, we review recent developments in giant panda conservation science and propose a strategic plan for moving panda conservation forward. Because of scientific, funding, political, and logistical hurdles, few endangered species management programs have embraced adaptive management, wherein management decisions are shaped iteratively by targeted scientific research. Specific threats, such as habitat destruction, anthropogenic disturbance and fragmented nonviable populations, need to be addressed simultaneously by researchers, managers and policy‐makers working in concert to understand and overcome these obstacles to species recovery. With the backing of the Chinese Government and the conservation community, the giant panda can become a high‐profile test species for this much touted, but rarely implemented, approach to conservation management. 相似文献
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大熊猫日粮氨基酸表观消化率的研究 总被引：1，自引：0，他引：1
日粮氨基酸的摄取量与大熊猫体重呈正相关 ,体重高者 ,对日粮必须氨基酸的摄取量亦多 ;B组大熊猫对日粮总氨基酸和必需氨基酸摄取量高于A组。摄取总氨基酸量两组差异显著 (P <0 0 5) ;摄取必需氨基酸量两组差异极显著 (P <0 0 1 ) ;大熊猫单位体重对日粮总氨基酸和必需氨基酸摄取量 ,组内个体间无显著差异 (P >0 0 5)。 相似文献
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2004年3～9月,我们对卧龙自然保护区核桃坪基地野化培训大熊猫个体＂祥祥＂的夜宿地组成结构进行了初步观察,并采用主成分分析（PCA）对471组夜宿地数据所涉及的7种结构因子（廊道、竹林、余竹堆、岩石、乔木、倒木、灌草丛）进行了统计分析。结果表明：在大熊猫＂祥祥＂的夜宿地结构中,＂廊道＂、＂竹林＂和＂乔木＂是最主要的3个因子。经单因素方差分析检验表明,在对地势的选择中,＂祥祥＂偏爱坡度5°～30°的缓坡竹林（P〈0.01）;环境温度增加是造成＂祥祥＂选择在树上休息的主要原因（P〈0.05）;在拐棍竹发笋期,随着活动的增加,夜宿地数量明显增多（P〈0.01）。观察结果反映出＂祥祥＂对自然环境的主动适应,对夜宿地的分析研究结果对今后的野化培训选址和培训方式提供了有益启示。 相似文献