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四川唐家河自然保护区鸟类资源 总被引:2,自引:2,他引:2
唐家河自然保护区的鸟类已知有204种,分隶于13目40科,占四川省鸟类615种的33%。古北种87种占种数的43%、东洋种90种占种数的44%、广布种27种占种数的13%。特产种27种占全国特产鸟类98种的28%、占四川省特产鸟类59种的46%。国家一级保护鸟类有4种、二级保护有26种,四川省重点保护鸟类有2种,我国和日本国候鸟协定保护的鸟类有22种。区内鸟类生物多样性十分丰富,是候鸟迁徙的重要途径地和停歇地,有候鸟81种,占种数的40%,在鸟类组成中占有比较重要的地位。 相似文献
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长岛自然保护区鸟类资源现状及保护 总被引:2,自引:0,他引:2
长岛是我国东部候鸟迁徙的必经之地 ,每年春秋季节有数以万计的鸟类经此迁徙。为了保护与研究这部分鸟类 ,1 984年成立了山东长岛候鸟保护环志中心站 ,下设几个环志点。 1 988年国务院批准建立国家级自然保护区 ,成立专门的管理机构。十几年来 ,保护区积极开展各项鸟类研究工作 ,有效地保护了鸟类资源。但近几年随着人口的增长和旅游业的发展 ,人类的活动对鸟类资源产生一定的影响。因此 ,了解长岛自然保护区的鸟类资源现状及采取适当的保护对策 ,对保护鸟类资源及合理开发旅游业具有重要的现实意义。1 自然概况长岛自然保护区 (E1 2 0°3… 相似文献
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四川唐家河自然保护区鸟类资源 总被引:1,自引:1,他引:1
唐家河自然保护区的鸟类已知有204种,分隶于13目40科,占四川省鸟类615种的33%.古北种87种占种数的43%、东洋种90种占种数的44%、广布种27种占种数的13%.特产种27种占全国特产鸟类98种的28%、占四川省特产鸟类59种的46%.国家一级保护鸟类有4种、二级保护有26种,四川省重点保护鸟类有2种,我国和日本国候鸟协定保护的鸟类有22种.区内鸟类生物多样性十分丰富,是候鸟迁徙的重要途经地和停歇地,有候鸟81种,占种数的40%,在鸟类组成中占有比较重要的地位. 相似文献
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选取明溪国家级陆生野生动物疫源疫病监测站2013 年8 月至2014 年7 月的监测数据, 分析鸟类组成及多样性情况, 对鸟类多样性的时间格局进行分析, 结果表明: 共记录到鸟类121 种, 分属15 目42 科; 分布型以东洋界为主,居留型以留鸟为主; 冬春季的群落多样性指数(H)和均匀性指数(E)均大于夏秋季, 尤其是春季最高。根据分析结果及当地实际情况进行讨论并提出保护对策。 相似文献
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近年来,作者与四川大学生命科学学院部分研究生等先后参与了四川绵阳市的两栖爬行动物调查研究,收集了一些有关区系及地理区划的资料,现报道如下. 相似文献
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丹江口库区湖北水源区不同密度马尾松人工林水源涵养能力 总被引:3,自引:0,他引:3
为了研究南水北调中线水源区汛期森林的水源涵养功能,以丹江口库区龙口林场马尾松人工林为对象,于2018年6-9月采用野外观测与室内分析相结合的方法,对高、中、低3种密度马尾松人工林,从林冠层、枯枝落叶层和土壤层进行分析,探究其丰水期水源涵养功能的林分密度效应.结果表明:(1)3种密度马尾松人工林林冠截留量为56.13~77.68 mm,且随林分密度增加林冠截留量增大,林内穿透雨量则趋势相反;(2)3种密度马尾松人工林枯落物总生物量为12.76~19.56 t·hm^-2,随着林分密度增加枯落物总生物量增大,且半分解层枯落物生物量均大于未分解层枯落物生物量;高密度枯落物总厚度最大,中密度次之,低密度最小;枯落物最大持水量为21.32~28.24 mm,有效持水量为16.82~22.51mm,且均表现为中密度>高密度>低密度;枯落物持水量、吸水速率与浸泡时间分别呈对数函数和幂函数关系式;(3)3种密度马尾松人工林O~ 30 cm土层土壤容重为1.45~ 1.54g·cm^-3,总孔隙度均值为42.18%~45.71%,土壤有效持水量为2.94~4.81 mm,且土壤容重大小为低密度>高密度>中密度,土壤总孔隙度排序则与之相反,土壤有效持水量表现为中密度>低密度>高密度;(4)3种密度马尾松人工林综合水源涵养能力为204~237.55 mm,表现为中密度>高密度>低密度.综上,丹江口库区中密度马尾松人工林水源涵养服务能力最优,建议在今后库区森林抚育过程中,合理控制林分密度. 相似文献
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Christopher F. Mason 《Biodiversity and Conservation》2001,10(4):495-510
A study over 4 years into the number of breeding bird species and species turnover (extinctions and colonisations) in relation to area was conducted in 35 woodlands, set in an intensively farmed landscape, in north-east Essex, UK. A total of 46 species was recorded. The number of species breeding increased with woodland area; the slope of the species–area relationship did not differ between years. Habitat diversity was the only other measured variable to influence species richness. Absolute species turnover was independent of woodland area but relative turnover declined with increase in woodland area. The numbers of territories of nine species were determined. For four summer visitors the number of woods occupied increased as the overall populations increased but, for the other species, changes in overall population size led to changes in numbers in occupied woods. Chaffinch Fringilla coelebs and Song Thrush Turdus philomelos were more associated with woodland edges, Nightingale Luscinia megarhynchos, Garden Warbler Sylvia borin, Chiffchaff Phylloscopus collybita and Willow Warbler P. trochilus with interiors. Several species showed an inverse relationship between population density and woodland area. Collections of small woods hold similar species richness to single large woods. While the acquisition of large woods for conservation purposes should be a priority, the extension of smaller woods to a size of about 10 ha would be highly beneficial to both the species richness and population stability of regional woodland bird assemblages. 相似文献
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四川绵阳洞栖蝙蝠多样性及受胁现状 总被引:3,自引:0,他引:3
1999~2005年,对四川省绵阳市洞栖性蝙蝠进行了凋杳。共采集到4科,5属,14种,约占四川蝙蝠种类31.8%,中国蝙蝠种类11.7%。其中,大足鼠耳蝠(Myotis ricketti)为中国特有种,中华鼠耳蝠(Myotis chinensis)已被列入《中国物种红色名录》中的易危(VU)种,南蝠(Iu io)等5种被列入近危(NT)种。调查中发现不少洞穴已被开发或正在被开发成旅游景点,人为干扰已严重威胁洞穴内蝙蝠的生存。建议对蝙蝠栖息地采取一定的保护措施,并加强保护蝙蝠的宣传教育。 相似文献
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四川绵阳地区野生猕猴肠道寄生虫感染的调查研究 总被引:3,自引:0,他引:3
对四川绵阳地区野生猕猴抽样100只,分别采用饱和食盐水漂浮法和沉淀集印法检查粪便中寄生虫卵,监测肠道寄生虫的感染率和感染强度。结果显示,感染当地野生猕猴的肠道寄生虫主要有8种,总感染率为78.0%,分别为:吸虫50.0%,毛尾线虫48.0%,蛲虫41.0%,钩虫32.0%,蛔虫26.0%,泡状带绦虫16.0%,球虫4.0%,后圆线虫4.0%,感染强度为毛尾线虫“++++”,蛲虫“++++”,吸虫“+++”,钩虫“+++”,蛔虫“++”,泡状带绦虫“+”,球虫“+”,后圆线虫“+”。表明该地区野生猕猴寄生虫感染较普遍,感染强度较大。 相似文献
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Availability of food resources, distribution of invasive species, and conservation of a Hawaiian bird along a gradient of elevation 总被引:1,自引:0,他引:1
Paul C. Banko Peter T. Oboyski John W. Slotterback Steven J. Dougill Daniel M. Goltz Luanne Johnson Megan E. Laut & T. Colleen Murray 《Journal of Biogeography》2002,29(5-6):789-808
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为探索矿产资源开发利用与保护规划对区域生物多样性的影响,本文选择四川甘孜藏族自治州作为研究对象,将整个甘孜州划分为8种植被景观类型,并在此基础上计算了2005年,预测了规划实施后2010年、2020年甘孜州的景观密度、频率、比例及优势度变化;通过规划区与生物多样性敏感区域的叠加,分析了二者之间的空间冲突;根据长江上游植被类型图面信息的筛选、集成和综合,结合野外调查,将甘孜州整个地域划分出40种不同植被类型,制作了甘孜州植被生物量分布图,并计算了每个规划开采区内的生物量;使用甘孜州动植物分布数据,统计了每一鼓励开采区和限制开采区内各个物种栅格数占规划区总栅格数的比例,以此分析区域矿业开发活动对该物种的影响程度.通过上述工作,提出了基于生物多样性保护的甘孜州矿产资源开发利用与保护规划调整建议. 相似文献
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Stephen R. Baillie William J. Sutherland† Stephen N. Freeman Richard D. Gregory‡ Emmanuel Paradis†§ 《Journal of Applied Ecology》2000,37(S1):88-102
1. Detailed studies of population ecology are usually carried out in relatively restricted areas in which emigration and immigration play a role. We used a modelling approach to explore the population consequences of such dispersal and applied ideas from our simulations to the conservation of wild birds.
2. Our spatial model incorporates empirically derived variation in breeding output between habitats, density dependence and dispersal. The outputs indicate that dispersal can have considerable consequences for population abundance and distribution. The abundance of a species within a patch can be markedly affected by the surrounding habitat matrix.
3. Dispersal between habitats may result in lower population densities at the edge of good quality habitat blocks and could partially explain why some species are restricted to large habitat fragments.
4. Habitat deterioration may not only lead to population declines within that habitat but also in adjacent habitats of good quality. This may confound studies attempting to diagnose population declines.
5. Although mobile species have the advantages of colonizing sites within metapopulations, dispersal into poorer quality territories may markedly reduce total populations.
6. There are two main approaches to conservation: one is to concentrate on establishing and maintaining protected areas, while the other involves conservation of the wider countryside. If dispersal is an important process then protecting only isolated areas may be insufficient to maintain the populations within them. 相似文献
2. Our spatial model incorporates empirically derived variation in breeding output between habitats, density dependence and dispersal. The outputs indicate that dispersal can have considerable consequences for population abundance and distribution. The abundance of a species within a patch can be markedly affected by the surrounding habitat matrix.
3. Dispersal between habitats may result in lower population densities at the edge of good quality habitat blocks and could partially explain why some species are restricted to large habitat fragments.
4. Habitat deterioration may not only lead to population declines within that habitat but also in adjacent habitats of good quality. This may confound studies attempting to diagnose population declines.
5. Although mobile species have the advantages of colonizing sites within metapopulations, dispersal into poorer quality territories may markedly reduce total populations.
6. There are two main approaches to conservation: one is to concentrate on establishing and maintaining protected areas, while the other involves conservation of the wider countryside. If dispersal is an important process then protecting only isolated areas may be insufficient to maintain the populations within them. 相似文献