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首页> 外文学位 >Ethnobotany, trade and population dynamics of Cycas circinalis L., and Cycas swamyi Singh & Radha in the Western Ghats of southern India.
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Ethnobotany, trade and population dynamics of Cycas circinalis L., and Cycas swamyi Singh & Radha in the Western Ghats of southern India.

机译：印度南部西高止山脉的苏铁，苏铁和印度cas的民族，贸易和种群动态。

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摘要

Harvest of Non Timber Forest Products (NTFPs) has been frequently studied as a means to conserve forests and provide income to user communities, often with the assumption that harvest has relatively little ecological impact. Cycas circinalis L. and Cycas swamyi Singh & Radha are such NTFPs extensively harvested from the Western Ghats, South India. They are harvested for bark, leaves, seeds and male cones by indigenous people for medicinal, food and ornamental purposes, while commercially harvested for the medicinal and floricultural industries. Although indigenous people have a long association with Cycas spp, harvest for sale in informal regional markets has been uncontrolled over the past 15years. Cycas circinalis is now regionally listed as 'critically endangered' and internationally listed as an 'endangered' species. In an attempt to understand the uses and responses of these species to harvest pressures, this study aims to document the trade, ethnobotany, life history, and population dynamics of Cycas spp. My study shows there is a large scale trade of leaves and pith and peak leaf sales occurs shortly after new leaf production in cycad habitats. The pith of C. circinalis and C. swamyi are collected for the herbal medicinal industry however, they are adulterants and don't provide the necessary constituents of the herbal drug, vidari. Demographical studies confirm that harvested populations are on a decline as the projected population growth rate over the long term lambda, was <1 for all harvested populations. Cycas spp have ancient lineages from the Jurassic age, being long-lived and slow-growing, and this coupled with intensive extraction reduces the chances for populations to rapidly withstand the induced stress of harvest. The effects of harvest can be further compounded by other disturbances such as fire, habitat loss and climate change. Sustainable harvest practices for seed harvested populations and the discontinuation of leaf and pith harvest vi are imperative to conserve the last few populations of C. circinalis and C. swamyi in the Western Ghats.
机译：非木材林产品（NTFP）的收获已被作为保护森林和为使用者社区提供收入的一种手段而经常进行研究，通常是假设收获对生态的影响相对较小。苏铁（Cycas circinalis L.）和苏铁（Cycas swamyi Singh＆Radha）都是从印度南部西高止山脉广泛收获的NTFP。它们是由土著人民收获的，用于药用，食品和观赏目的，用于树皮，树叶，种子和雄果的收获，而用于医药和花卉产业的则是商业性收获。尽管土著人民与Cycas spp有着很长的联系，但是在过去15年中，在非正式区域市场上出售的收成一直不受控制。苏铁（Cycas circinalis）现在在区域上被列为“极度濒危”，在国际上被列为“濒危”物种。为了了解这些物种对收获压力的用途和反应，本研究旨在记录苏铁属的贸易，民族植物学，生活史和种群动态。我的研究表明，苏铁生境中叶片和髓的交易量很大，在新叶片生产后不久，叶片销售达到峰值。圆柏和斯瓦米的髓是为草药行业而收集的，但是它们是掺假的，不能提供草药维达里的必要成分。人口统计学研究证实，由于长期lambda的预期人口增长率对所有收获的人口均＜1，因此收获的人口正在下降。苏铁属具有侏罗纪时期的古老血统，寿命长且生长缓慢，这与集约化采伐相结合，减少了种群迅速抵御诱发的收获压力的机会。收成的影响可能会因其他干扰而进一步加剧，例如火灾，生境丧失和气候变化。必须采取可持续的种子收获种群采摘方式，并停止叶和髓收获六，以保护西高止山脉的最后几个种群的圆环梭子蟹和湿地梭菌。

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  • 作者

    Krishnamurthy, Vandana.;

  • 作者单位

    University of Hawai'i at Manoa.;

  • 授予单位 University of Hawai'i at Manoa.;
  • 学科 Botany.;Conservation biology.;Plant sciences.;Ecology.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 164 p.
  • 总页数 164
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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