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POTENTIAL AND PROSPECTS OF VEGETATION RECOVERY IN DEGRADED LANDS IN INDIA - A REVIEW

机译:印度退化土地上植被恢复的潜力和前景-综述

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Continued degradation of natural forests in India and increased anthropogenic pressures on scarce natural resources are issues of concern. The resilience and potential of degraded forests to recover, under protection, on their own towards more complexcommunities are described in this review paper. The need to involve 'local' forest dependant communities in forest protection through suitable mechanisms is also highlighted. The appearance of shade loving and shade tolerant species after twenty years of forest fallow cycle and increased species diversity in North-East India, indicates the need for a long fallow cycle after slash and burn agriculture. In the Shiwaliks community protection of forests in watersheds led to significant improvements in species stocking rate. In the ravines of Central India, continued protection led to the appearance of a large number of annual and perennial grasses, herbs and shrub species besides an assortment of tree species. Vegetation development however showed variations with regard to topographical situations. In landslide affected areas in the Himalayas, a period of five to six years was required for pioneer species to be replaced by perennial species. Soil nutrient build up however took several decades to occur, after which stable plant communities established themselves. In areas affected by mining, interventions in the form of suitable soil and water conservation techniques were a prerequisite for vegetation establishment and development. The appearance of early and late colonizers were observed to be directly related to improvements in edaphic conditions. Forest dependant rural communities are often cited to be the culprits with regard to forest exploitation. This paper, on the other hand cites some exampleswhere rural communities have been able to protect, conserve and regenerate large areas of natural forest on their own initiative and by local institutional mechanisms. Participatory planning and integrated watershed development, specially in ecologically fragile zones like the Himalayas are essential for ensuring environmental security.
机译:印度天然森林的持续退化以及对稀缺自然资源的人为压力增加是令人关注的问题。在这篇评论文章中,描述了退化森林在保护下自己恢复为更复杂社区的复原力和潜力。还强调需要通过适当的机制使“当地”依赖森林的社区参与森林保护。在印度东北部森林休耕二十年后,出现了喜欢树荫和耐荫的物种,并且印度东北部物种的多样性增加,这表明在砍伐和焚烧农业后需要较长的休耕周期。在Shiwaliks社区,对流域森林的保护导致物种蓄积率的显着提高。在印度中部的沟壑中,持续的保护导致除了种类繁多的树种外,还出现了大量的一年生和多年生草,草药和灌木树种。然而,植被的发展显示出地形情况的变化。在喜马拉雅山遭受滑坡影响的地区,先驱物种要被多年生物种取代需要五到六年的时间。然而,土壤养分的积累需要数十年的时间,此后稳定的植物群落得以建立。在受采矿影响的地区,采取适当的水土保持技术形式的干预措施是建立和发展植被的先决条件。观察到早期和晚期定植者的出现与改善后道状况直接相关。经常提到依赖森林的农村社区是森林开发的罪魁祸首。另一方面,本文列举了一些例子,其中农村社区能够主动地和通过当地机构机制保护,养护和再生大片天然林。参与式规划和流域综合开发,特别是在喜马拉雅山等生态脆弱地区,对于确保环境安全至关重要。

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