共查询到20条相似文献，搜索用时 187 毫秒
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通过野外样方调查与ArcGIS分析相结合并采用典型样地法,对漳州南靖县下割村九龙江边草地随机选取样点进行草地植物群落特征调查,对群落内植物的数量、频度及群落相似性等进行统计,分析江边草地植物群落特征与物种多样性,为江边草地资源合理利用提供参考。 相似文献
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采用样线法、访问调查法和文献检索法对广东康禾自然保护区的野生哺乳动物资源进行初步调查。结果表明,康禾自然保护区有哺乳动物30种,隶属于6目14科,其中国家II级重点保护动物1种,即斑林狸;广东省重点保护动物4种;"三有"哺乳动物15种。保护区的哺乳动物以东洋界为主。针对野生动物栖息地缩小和非法猎捕活动等问题,提出加大执法力度,加强保护宣传教育活动,开展野生动物监测等措施。 相似文献
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本文通过在野外架设红外照相机拍照、样方痕迹调查以及查阅保护区野外巡护历史资料等调查研究方法,对长青国家级自然保护区华阳保护站辖区内的金猫垂直分布和季节性活动规律进行了研究。研究显示华阳保护站辖区内的金猫分布海拔范围在1 520m～2 703m之间,金猫的垂直分布随季节变化的特征比较明显,活动范围区域性较强。 相似文献
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用3.333米样段法测算苗木产量 总被引：1，自引：0，他引：1
<正> 测算苗木产量的方法颇多。黑龙江林科院用固定面积的样方在代表性的地段上设若干样点;北京林学院根据苗木密度确定样地面积和样本数量,用随机抽样法布点和调查;辽宁省简化北京林学院的调查方法,即不设辅助样方和减少测量面积,经全省12个苗圃的调查表明,也能达到要求的精度。以上几种调查方法,虽然精确度要求不高(要求以90%的可靠性估计达到90%的精度来调查苗木产量),但野外调查计算较难,方法繁琐,工作量大。笔者在苗圃用3.333米样段法调查条播条植的苗木产量,经多点验证表明,方法简便,计算容易,精确度高。 相似文献
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张兰 和雪莲 Supparat Tongkok 袁盛东 刘峰 Anuttara Nathalang Warren Y. Brockelman 闫兴富 林露湘 《林业调查规划》2023,48(5):131-138
2017年6月至9月和2018年5月至9月,利用红外相机分别对位于西双版纳的纳板河流域国家级自然保护区、西双版纳国家级自然保护区和泰国Khao Yai国家公园的三个热带森林动态监测样地的地面活动兽类和鸟类进行了监测。每个样地分别布设49台红外相机,共拍摄到66种野生动物,包括6目13科24种兽类,7目15科41种鸟类以及1种两栖类。监测结果在一定程度上反映了保护区内野生动物种类,可为基于动态监测样地的生态学和保护生物学研究提供参考。 相似文献
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The endozoochorous and epizoochorous dispersal of vascular plant species by roe deer (Capreolus capreolus) and wild boar (Sus scrofa) was investigated in forest areas of Schleswig-Holstein and Lower Saxony, Germany. The primary aim of this study was to learn about which plant species and in what numbers diaspores are dispersed by the two wild ungulate species. In particular, the significance of zoochory for species composition and biodiversity of forests was evaluated. Fresh faecal pellets were collected from April–November 2001 in the forests of the two study areas. In addition, the coats and hooves of shot roe deer and wild boar were brushed out. The number of viable seeds was determined by greenhouse germination (seedling emergence method). The samples were spread in trays over sterilized soil from the study forests and were kept under controlled conditions in the greenhouse for 12 months. A total of 2,473 individuals from 77 vascular plant species were recorded. While roe deer exceeded wild boar concerning seed contents in the faeces, the significance of roe deer for epizoochorous dispersal was relatively low compared with wild boar. An analysis of the habitat preference of the vascular plant species dispersed by the two ungulate species revealed a high proportion of species growing in forests as well as in the open landscape, and also of non-forest species, while woody plants and herbaceous species closely tied to forest habitats were severely underrepresented. We also discuss consequences for forest ecology and nature conservation. 相似文献
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采用公里网格布设法,在安西极旱荒漠国家级自然保护区冰洞子沟区域设置红外触发相机20部,对区域内大中型兽类和地面活动鸟类进行初步调查。结果显示:监测到兽类4目5科7属7种,鸟类4目7科7属8种,包括北山羊、金雕2种国家Ⅰ级重点保护动物;盘羊、猞猁、狼和短耳鸮4种国家Ⅱ级重点保护动物;兽类中北山羊和中亚兔相对丰富度指数较高,鸟类中石鸡和漠即鸟相对丰富度指数较高。物种稀疏曲线显示,兽类在3个月后趋于稳定,鸟类在10个月后趋于稳定,表明调查取样充分。本次初步调查基本上掌握了保护区冰洞子沟区域鸟兽本底信息,总结讨论了红外相机在鸟兽资源监测中存在的问题及措施,为保护区的科学管理提供地依据和指导。 相似文献
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2019年9—12月,采用访问调查及样线调查法对中老跨境联合保护区域中方一侧辖区的65个村寨开展动物物种多样性调查。共调查到兽类物种7目20科59种,均为《世界自然保护联盟濒危物种红色名录》(IUCN红色名录)收录物种,其中国家Ⅰ级重点保护野生动物11种,国家Ⅱ级17种,“三有”保护动物26种。中老跨境联合保护区域是西双版纳兽类多样性最高区域,且珍稀物种比例最高,如金钱豹、云豹、金猫、豺、黑熊和马来熊等大型动物,兽类以食肉目物种最多(6科25种),占兽类物种总数的42.4%。中老联合保护项目存在着因项目资金局限和不足造成工作未能如期开展,语言障碍、通讯不畅导致双方交流理解低效和部分项目工作滞后等问题。提出加强对巡护员的技能培训,增加调查方法和设备,加强与老挝农林部门的跨境生物多样性联合保护等建议。 相似文献
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通过文献查找、路线调查、样地调查等方式方法,对福州市旗山国家森林公园豆目野生观赏植物资源进行实地调查和统计分析,其结果表明：豆目观赏植物资源种类丰富、生活型多样、观赏价值较高,大多可作为观赏植物栽培。在此基础上针对豆目野生植物的保护、开发利用提出建议。 相似文献
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Invasion of natural ecosystems by exotic plant species is a major threat to biodiversity. Disturbance to native plant communities, whether natural or management induced, is a primary factor contributing to successful invasion by exotic plant species. Herbivory by both wild and domestic ungulates exerts considerable impact on structure and composition of native plant communities. Intensive herbivory by ungulates can enhance exotic plant invasion, establishment, and spread for three reasons: (1) many exotic plants are adapted to ground disturbances such as those caused by ungulate feeding, trampling, and movements; (2) many exotic plants are adapted for easy transport from one area to another by ungulates via endozoochory and epizoochory; (3) many exotic plants are not palatable or are of low palatability to ungulates, and consequently, their survival is favored as ungulates reduce or eliminate palatable, native plants. Ungulate herbivory is a chronic, landscape-scale disturbance capable of influencing plant communities as much as episodic events such as fire. Consequently, ungulate herbivory has the potential to facilitate the invasion and establishment of exotic plants in the interior Pacific Northwest where ungulates occupy nearly every ecosystem. Moreover, ungulate herbivory has intensified in many ecosystems, owing to the addition of domestic ungulates with that of existing, wild ungulates, coupled with the reduction or elimination of migratory movements and predators that previously regulated wild ungulate populations and influenced their distributions. Despite the observational evidence for ungulate herbivory as a strong facilitator of exotic plant invasion and establishment, current knowledge of cause–effect relations is severely limited by a lack of manipulative experiments. Most studies have been observational, unreplicated, and lack the experimental controls needed to eliminate or account for confounding sources of variation. Heightened attention to conservation of biodiversity will increase the importance of managing ungulates in balance with the plant communities that support them. 相似文献
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