共查询到20条相似文献,搜索用时 812 毫秒
1.
2.
3.
拟建福建木兰溪源自然保护区位于南亚热带与中亚热带的过渡地带,是东南沿海典型的山地森林生态系统。区内分布有大面积典型常绿阔叶林,生物多样性丰富,珍稀濒危物种多样。文章研究了区内植物种类、植物区系的地理成分和植被类型,从植物区系的古老性与特有性、植被的典型性、物种多样性与稀有性、群落的稳定性与面积的适宜性、生态系统的社会服务功能、对建设戴云山自然保护区群网的作用等角度考察了拟建自然保护区的生态地位。 相似文献
4.
5.
<正>罗霄山脉南段的江西南风面国家级自然保护区保存着典型中亚热带山地常绿阔叶林,集中分布着资源冷杉、伯乐树、南方红豆杉、南方铁杉、青钱柳、香果树等多种原始植被类群。罗霄山脉南段的万洋山南段和诸广山北段的东侧,便是江西南风面国家级自然保护区。南风面有罗霄山国家森林步道和遂川千年鸟道,主要保护资源冷杉、南方红豆杉、 相似文献
6.
绿色宝库——都庞岭国家级自然保护区 总被引:1,自引:0,他引:1
永州都庞岭国家级自然保护区于 2000年 4月经国务院批准建立,成为我省第 5个国家级保护区。它座落在永州南面,有“绿色宝库”之美誉,随着社会经济的快速发展,这颗灿若明珠的绿色宝库 越发闪耀 自然条件优越。都庞岭位于永州西南面的都庞岭主脉、南岭山脉的中段,总面积 2万公顷,是我国最具典型和代表性的中亚热带向南亚热带过渡地带,地理位置独特。气候温暖,雨量充沛,水热条件优越,为植物生长提供了有利的自然条件,从山脚至山顶整个山体都保存比较完整的常绿阔叶林生态系统,不仅海拔沟谷常绿阔叶林保存完整,即使在最高海拔的… 相似文献
7.
在调查大峡谷自然保护区植被和植物资源的基础上,对该区的植物区系和植被类型进行了分析.结果表明:该保护区的原生植被种类丰富,具有从南亚热带向中亚热带过渡的特点;区内植物区系成分复杂,组成以热带-亚热带和热带成分为主,热带性分布的植物类群甚多,使得区内沟谷常绿阔叶林具有某些雨林特征,小型板根、茎花现象、附生植物、藤萝密布等随处可见,而在其它中亚热带地区这种现象很少见;保护区内的植被有8个类型,包括具有雨林特征的常绿阔叶林、山地常绿针阔叶混交林、山顶常绿阔叶矮林、崖壁常绿矮林、亚热带针叶林、亚热带竹丛、亚热带灌丛草坡等,以及假苹婆、榕树林等18个群系;大峡谷自然保护区多样性植被类型具有与其独特的地形地貌相适应的特点. 相似文献
8.
9.
广西雅长兰科植物自然保护区位于乐业县境内,地处云贵高原和广西丘陵接壤的斜坡地带,也是我国热带和亚热带的过渡地带。保护区内兰科植物集中,森林连片分布,原生性较强,生物多样性丰富,代表性强,稀有性突出,自然性好,具有重要的保护价值和科学研究价值:它以其独特的生态环境,丰富的生物多样性资源,壮丽奇特的地形,完好的植被类型,而倍受中外学的关注。 相似文献
10.
11.
天然林择伐经营技术的应用研究 总被引:8,自引:0,他引:8
按照森林可持续经营的原则,从天然林生态保护角度出发,以福建省永安市为例。利用森林分类经营方法对天然林经营进行科学分类,提出天然林因林因地实行合理的择伐方式是实现天然林可持续发展的有效途径,为天然林择伐经营的具体实施提供科学依据。 相似文献
12.
13.
苏南丘陵低丘岗地治理与开发营林模式优化选择的研究 总被引:3,自引:1,他引:2
对苏南宁镇丘陵、溧阳丘陵低丘岗地治理与开发有关用材林、经济林8个类型12种营林模式的生产力和经济效益评估研究表明:杉木与宝华玉兰、杉木与香樟观赏绿化苗复合模式,其生产力和经济效益较高,经济效益比纯杉木林提高3.7-9.3倍。湿地松与茶树模式,经济效益比同龄杉木用材林高82.3%,并多生产木材14.2%。板栗与茶树(3a行间套植)模式,经济效益显著,比纯纯栗林高1.77倍,且能有效地改善林地冬春季森林景观。桃树与多年生牧草模式、板栗与多年生牧草模式,生产力和经济效益最高,但需引进优质畜、禽(食草良种羊等),结合畜牧业增值。板栗与太子参模式,经济效益也较高,应需在缓坡地应用,以免在挖掘药根时造成水土流失。上述优化选择出的6种营林复合模式可在低丘地岗地地区进一步完善推广应用。 相似文献
14.
l "trod notionViolent human disturbance results in global landscape and vegetation fragmentation, including thepolar landscape and alpine vegetation (Cox, 1993).In modern world, environment and development aretWo important problems, which have a direct effecton the destiny of human and the earth. Forestry,which undertakes double missions that are to optimize the environment and promote the development,is the crux to realize the unity of environment anddevelopment (Liu 1985).China is a develop… 相似文献
15.
16.
根据莲花山森林公园地形地貌和原有森林进行规划 ,从大景观的角度 ,形成虚与实、静与动以及色彩变化的对比 ,创造以森林为主的变幻景观。以创造一个集文化品位和科普科研为一体 ,满足市民休闲 ,具有良好的城市景观的森林公园 相似文献
17.
自从1950年以来,在四川西部高山峡谷区设置了700块样地,对该区域森林分布特点及森林演替与环境梯度间的关系进行研究.结果表明,高山峡谷区森林建群种以冷、云杉两属树种为优势,形成90多种森林类型;冷杉林多分布于各河流及其支流的中、上部,而云杉林多分布于宽谷地带和半阴半阳坡;冷云杉林冠下天然更新不良,而林窗天然更新效果较好;森林演替与垂直梯度关系密切;演替途径与原林型林下植被层片有关;人为措施可以促进或延缓演替进程;扩张更新效果常受地形、植被、风向影响。图4参9。 相似文献
18.
19.
Zongzheng Chai 《Scandinavian Journal of Forest Research》2016,31(4):368-381
Understanding the factors that allow the successful regeneration of species is a key step toward the conservation and management of forests. In this study, canonical correspondence analysis was used to examine the relationships between the distribution of the regenerating species in pine-oak mixed forests and 18 environmental factors of topography, soil properties, and forest characteristics in seedlings and saplings in the Qinling Mountains in China. A generalized additive model was used to fit the response of the density of the regenerating species to the various environmental factors. Variation partitioning in both seedling and sapling stories indicated that the order of importance was soil properties?>?forest characteristics?>?topography. The distribution of seedlings and saplings was mainly influenced by slope gradient, shrub cover, and available phosphorus. Herb cover and total nitrogen level were major environmental factors affecting the density of the regenerating seedlings, but total potassium level and elevation were significant variables for saplings. Not all seedlings were able to establish successfully, perhaps due to stress from the external environment and the heterogeneity of the light availability in the understory as the forest developed. Appropriate thinning of stands with higher densities and closed canopies is expected to produce gaps and promote the natural regeneration of pine-oak mixed forests in the Qinling Mountains. 相似文献
20.
Hiromi Yamagawa Satoshi Ito Yasushi Mitsuda Kazuro Fukuzato 《Journal of Forest Research》2006,11(2):99-106
We investigated factors limiting the recovery of natural forest in former large-scale conifer plantations abandoned after
clear-cutting in southwestern Japan. We analyzed forest recovery status (“recovered” sites covered by evergreen broad-leaved
trees, and “unrecovered” sites covered by pioneer community or nonvegetated sites) using aerial photographs and field survey.
We applied logistic regression analyses to evaluate the effects of topography, construction of harvesting roads, distance
from remnant forest, stand condition before clear-cutting, and prior land-use history on forest recovery. Human factors, i.e.,
land use and clear-cutting age, were found to affect to forest recovery more than environmental factors such as topography.
Harvesting roads had the strongest negative impact on forest recovery. Forest recovery after clear-cutting of young sugi plantations
also took longer than after clear-cutting of old sugi plantations or evergreen broad-leaved forests. Furthermore, areas formerly
utilized as meadows recovered less successfully than those that had been managed as coppices. The influences of these factors
were thought to be promoted by the advance reproduction as the regeneration sources for forest recovery. The influence of
stand age before logging suggested an effect of thinning, which might alter the abundance of advanced reproduction in the
understory. However, distance from remnant forest appeared to be less important. An influence of topography was also detected,
but this could be partly explained by the existence of advance reproduction in the understory in certain topographic positions.
Thus, our analysis suggests that regeneration sources originating from advanced reproduction in plantations play a significant
role for the recovery of natural forest after clear-cutting. 相似文献