共查询到20条相似文献,搜索用时 156 毫秒
1.
2.
根据区域资源现状以及生态建设和林业产业布局,将上思县林地划分为5个功能区,即北部四方岭用材林功能区、中部台地工业原料林功能区、东部水源涵养林功能区、南部丘陵防护林用材林功能区、南部十万大山自然保护功能区。阐述各功能分区范围和林地资源现状,并参照国家有关林地保护利用的相关规划要求,分别不同功能分区提出相应的保护利用方向和措施。 相似文献
3.
4.
自然保护区功能区区划技术研究 总被引:6,自引:0,他引:6
自然保护区功能区区划是保护区建设、管理和发展最基础的工作之一。长期以来,由于功能区区划缺少系统的基础理论研究,标准和方法单一,造成许多保护区建而不管或管得过严,社区矛盾日益突出。通过长期观察思考和系统研究,时功能区区划从理论和技术上进行探讨,提出自然保护区功能区区划指标体系,并提出了地理信息系统在功能区区划中的应用方法。 相似文献
5.
6.
7.
在分析大小兴安岭生态功能区生态地位和生态补偿现状的基础上,从生态补偿的目标、方式、标准、时限、资金的募集等方面设计了大小兴安岭生态功能区生态补偿框架,可为生态功能区生态补偿体系的建立提供参考。 相似文献
8.
根据陆良县森林资源现状以及生态建设和林业产业发展布局,将陆良县林地划分为4个功能区,阐述各功能区范围及特点,提出各功能区的保护利用措施。 相似文献
9.
依据重庆市北碚区2020~2022年区域环境噪声和功能区环境噪声监测资料,评价了重庆市北碚区城市声环境现状,分析了区域环境噪声和功能区环境噪声质量状况和变化趋势。结果表明:2020~2022年,重庆市北碚区区域环境噪声连续3年呈下降趋势,且网格噪声达标率为100%,噪声水平为二级,评价等级为较好;功能区环境噪声整体呈上升趋势,且1类功能区监测点的超标率高于2类功能区监测点位,同时夜间噪声比昼间噪声污染严重。根据监测结果的分析对比,从布局、源头控制等方面提出了进一步防治噪声污染的措施。 相似文献
10.
温岭市湿地保护功能分区探讨 总被引:1,自引:0,他引:1
根据温岭市的地形地貌,特别是湿地类型的分布,划分为四个湿地保护功能区,并提出了保护和利用的重点。山地河谷湿地功能区主要涉及中西部山区,以河流、库塘湿地为主,通过水源涵养、饮用水源等方式保护;平原水网湿地功能区包括中部东部平原,以河流、运河、输水河、养殖场湿地为主,通过污染整治工程进行治理;海岸围垦湿地功能区主要包括东海塘、南海涂、乐清湾等区域,主要以沙石海滩、淤泥质海滩、潮间盐水沼泽湿地为主,通过生态系统重建和恢复以及建设湿地公园进行保护和利用;近海与岛屿湿地功能区包括东部海域和海岛周围海域,以浅海湿地为主,通过海域污染防控和开展滨海旅游进行保护和利用。 相似文献
11.
12.
大理苍山是我国著名的高山、亚高山植物模式标本产地之一。通过访问调查和资料分析,共录得模式标本产自苍山或苍山附近的种子植物共计289种,隶属于61科156属,其中有21种为苍山特有种。模式标本植物中杜鹃属植物20种,占已知苍山杜鹃属植物59种的33.9%;报春属植物12种,占已知苍山报春属植物25种的48.0%;龙胆属植物7种,占已知苍山龙胆属植物29种的24.1%;兰科植物的多种稀有种的模式也产于苍山。 相似文献
13.
Cicik Udayana Harry P. Andreassen Christina Skarpe 《Journal of Sustainable Forestry》2013,32(8):715-732
We investigated herb and woody species at rehabilitated forests planted by mahogany and teak, and original, not rehabilitated forests in Yogyakarta, Indonesia. Plant species were classified into five use categories: medicine, food, fodder, ornament, and construction. We registered 142 species belonging to 54 families known as useful species with at least one, often more, use categories. The number of useful species was highest for medicine use (107 species). There was a dominance of exotic herb species used for food and annual herbs used for fodder. The number of useful herbs and exotic woody species was highest in teak stands. The number of woody species used for medicine, food, and construction was higher than those for ornament and fodder. All herb species decreased with time, except annual native, that increased. Around 50% of the useful species occurred only once in one site, and some species showed a distribution restricted to one type of stands. Overall, our results seem to show that rehabilitated stands are doing well with regard to useful herb and woody species. We suggest strategies for plant and ecosystem conservation, especially for rare native plant species and species with restricted distribution. 相似文献
14.
通过野外调查和查阅文献资料,获取新生桥国家森林公园植物资源信息,从植物种类、区系等方面对森林公园植物多样性进行分析。结果表明,森林公园共记录种子植物115科417属734种,其中裸子植物5科10属11种,被子植物110科407属723种。种子植物科的组成以小科(55科,占47.8%)和极小科(31科,占27.0%)为主,科内种的组成以中等科(238种,占32.4%)和小科(182种,占24.8%)为主;属的组成以小属(132属,占31.6%)和极小属(272属,占62.5%)为主,属内种的组成以小属(325种,占48.0%)和极小属(272种,占37.1%)为主;优势科7科,优势属22属;在属级和种级水平植物区系上,温带分布均占有绝对优势;有3个中国特有属,265种中国特有种;有国家一级重点保护野生植物1种,国家二级重点保护野生植物5种。 相似文献
15.
16.
17.
18.
Studies on the effect of forest loss and fragmentation on plant species richness at different spatial scales have yielded contradictory results that have been attributed to different ways to measure fragmentation. The main goal of this study was to investigate the independent and combined effects of forest loss and habitat fragmentation on woody species richness. Woody species were grouped according to their habitat requirements (forest specialists, forest generalists, non-forest and total woody species). We used regression models to investigate the effect of fragmentation and human occupation on woody species richness. The underlying factors were investigated by partitioning of the variation, i.e. decomposing the variation in species richness between the pure effects of forest loss, fragmentation and human occupation. The relationship between species richness and forest loss resulted extremely non-linear. The models for forest specialist, generalist and total woody species richness accounted for 35%, 31% and 33% of the total variance respectively. Model for non-forest species richness only accounted for 7% of the total variance. The largest fraction of variability in species richness was accounted by fragmentation variables for all groups (except for non-forest species). Results emphasize the larger independent effect of fragmentation over forest loss, suggesting that species variation is mainly conditioned by the spatial configuration of the habitat. 相似文献
19.
广西特有竹种及其保护研究 总被引:1,自引:1,他引:0
对广西自然分布的竹类植物进行归纳整理,在23属157种及变种中,广西特有竹种14属39种及变种,占广西竹种总数的24.8%。其中:簕竹属数量最多,有11种,大节竹属5种,其他属各1~3种。在这些特有竹种中,合轴丛生竹有6属16种,单轴散生竹有10属23种。分布于自然保护区内的11种竹种得到了较好的保护;分布于自然保护区外的28种竹种生境狭窄、环境恶化、日渐濒危。建议对自然保护区内的竹种进行原地保护,对自然保护区外的竹种尽快迁地保存;种群数量少的竹种要立法保护,经济价值、观赏价值较高的竹种要开发利用。 相似文献