共查询到20条相似文献，搜索用时 531 毫秒
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以景宁县千峡湖库区为例,探讨了库区生态公益林建设中存在着公益林资金分配不合理、矛盾纠纷多、林分质量差等问题,提出了核实完善公益林区划界定、加强纠纷调解、实施分类补助等解决对策。 相似文献
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本文针对丹江口湖北库区坡耕地化学农药及面源污染等问题,在广泛查阅文献资料及实地调查的基础上,对库区坡耕地化学农药使用与污染的现状进行了分析和综述,提出了库区坡耕农药污染阻断途径和综合防治措施,以期为库区坡耕地农药污染防治提供依据和决策参考. 相似文献
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丹江口库区生态公益林建设浅析 总被引：1，自引：0，他引：1
本文就丹江口水库库区生态环境状况进行了调查分析,提出在库区及周边实施以公益林建设为主要内容的生态环境建设的急迫性、必要性,以及今后的建设重点、建设思路和建设措施等。 相似文献
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通过对陕北榆林地区王圪堵水库库区植物配置方式的探讨,论述了库区植物配置原则,分析了整体植物的配置布局,提出了榆林地区水库景观环境中植物品种的选择,以及各个品种的组团搭配方式,以期营造库区景观绿化环境,提升及美化库区整体生态环境。 相似文献
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利用TM影像对滇西南7个地（州）27个县（市）开展了调查，并按2级分类的要求进行目视解译，其结果为研究区热带林覆盖率为46.09%，郁闭林面积占研究区总面积的10.46%，破坏林面积占总面积的35.63%，常绿阔叶林面积占总面积的32.61%，热带雨林和季雨林面积占总面积的0.20%，判读精度81.53%。表明TM影像能满足热带林宏观林地资源调查的需求，既快速，又省力、省钱，具有一定的实用性。 相似文献
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Cicik Udayana Harry P. Andreassen Christina Skarpe 《Journal of Sustainable Forestry》2020,39(5):494-510
ABSTRACT Forest rehabilitation is when a desired tree species is planted in degraded forests or lands. Rehabilitation by planting a single tree species is a common way to restore exploited forests to maintain ecological processes. We compared woody and herbaceous understory vegetation between forests rehabilitated by mahogany (N = 12) or teak (N = 12) planted from 1941 until 2003 in Yogyakarta, Indonesia. Understory vegetation of these areas was compared with that of three native forests. Species richness, species diversity, density of plants and proportion of native plants did not differ between the rehabilitated areas and the native forest. Recently rehabilitated areas were different from the native forests while 41–74 yr after rehabilitation, characteristics of understory vegetation approached those of native forest. We described species composition using ordination, and found it to differ between areas rehabilitated with teak and with mahogany and, particularly, between the rehabilitated areas and the native forests. Time since rehabilitation and tree species planted were important for the species composition of understory vegetation. We conclude that the selection of species for rehabilitation and letting rehabilitated areas mature are important for understory development and species diversity. 相似文献
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ABSTRACT For landscape level conservation and rural sustenance, forests outside of protected areas are becoming increasingly important. Since most outside forests in the lowlands of Nepal are under government control and utilized as open access resources, their feasibility to achieve these objectives is questionable. We compared forests inside (with three decades of strict protection) and outside of protected areas (under government control and proposed as community forests) to assess the ecological sustainability of outside forests and to provide baseline data on structure of outside forests so that effectiveness of community forestry (after implementation) can be evaluated in the future. Our results indicate that outside forests were in a degraded condition with low tree, sapling and seedling densities and lower species diversity. Trees in lower dbh (diameter at breast height) classes were absent in these forests. Although the canopy layer was not significantly different, the ordination of plots and species showed that species composition of understory and the ground layer were different than protected forests. The present condition of outside forests is not only ecologically unsustainable but also cannot fulfill the demands for forest products of local people. The inefficiency of government to monitor against exploitation has been responsible for present conditions. We recommend that community forestry programs, which are successful in improving conditions of degraded forests in the mountains of Nepal, should be widely implemented in lowland areas (Terai) and proposed community forests should be handed over to local communities as soon as it is practicable. 相似文献
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Yuichi Yamaura Hitoshi Tojo Yasumasa Hirata Kenichi Ozaki 《Journal of Forest Research》2007,12(4):298-305
It is important to conserve forest-dependent organisms not only in broadleaved forests but also in plantation forests. We
examined how surrounding forest areas affect forest bird assemblages inhabiting conifer plantations and broadleaved forests
in a rural landscape in central Japan. Surrounding forest areas were measured separately as plantation area and broadleaved
forest area within 200 m of each sampling site. We used hierarchical partitioning to analyze the effects of surrounding forest
areas and stand structures (stand height and understory coverage) on the occurrence of four species groups. We especially
focused on mature forest users that are most sensitive to loss of broadleaved forests. Occurrence of mature forest users inhabiting
plantation sites was positively affected both by plantation area and broadleaved forest area whereas the occurrence of mature
forest users inhabiting broadleaved forests was affected by stand height only. These results suggest that surrounding forest
areas were more important to mature forest users in plantations than in broadleaved forests. To conserve mature forest users,
increasing surrounding forest areas are important in plantations whereas increasing stand heights would be effective in broadleaved
forests. 相似文献
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按照甘肃省公益林所处的5个生态区位(江河源头区、江河两岸区、森林和陆生野生动物类型的国家级自然保护区、重要水库区、荒漠化和水土流失严重地区),分别阐述各生态区公益林的资源分布、林地类型、树种组成和生态功能。以此为基础,对全省的公益林进行了综合评价。结果表明,全省国家级公益林面积为673.36万hm2,占森林总面积的68.63%,表现出了"相对数量较多,绝对数量偏少"的特点;灌木林占公益林总面积的49.15%,占公益林的主体地位。要采用3S技术等现代科技手段进行资源的监测与管理,开展公益林组成、结构与功能的调整与科学经营,实现公益林的稳定性和可持续性。 相似文献