Changes in landscape vegetation, forage plant composition and herding structure in the pastoralist livelihoods of East Pokot, Kenya

Changes in landscape vegetation, forage plant composition and herding structure in the pastoralist livelihoods of East Pokot, Kenya
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肯尼亚东波科特牧民生计景观植被、饲料植物组成和放牧结构的变化

DOI:
10.1080/17531055.2015.1134401
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发表时间:
2016
影响因子:
1.4
通讯作者:
--
中科院分区:
法学3区
文献类型:
--
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口头证据从牧区Pokot在北方Baringo区的牧场植被变化点的结构和生物多样性组成的重大变化,在过去的世纪。一片多年生草地已经变成了金合欢占主导地位的荒地。Pelil(Acacia nubica),talamogh(Acacia mellifera)或anyua(Acacia reficiens),它们覆盖了今天的田园景观,自20世纪50年代以来迅速增加。本文比较了目前的变化,草成分与以前的帐户的看法,突出下降的高品质草,如abrute(臂形草deflexa,狗尾草homonyma)或普云(画眉草cilianensis)的地方评估。所描述的变化与许多因果因素(高放牧压力,限制牧民流动,人口数量增加)有关,使我们能够历史化景观植被的深刻变化。灌木入侵的成本和效益也进行了研究。山羊数量的大幅增加和骆驼群的大规模增长与浏览器饲料植物的增加密切相关。文章最后通过对比Pokot长老对景观的看法与环境变化的科学解释来得出结论。
Oral evidence from pastoral Pokot on vegetation changes in the rangelands of northern Baringo District points to major changes in structure and biodiversity composition over the past century. A landscape of perennial grasses has turned into an Acacia-dominated bush-land. Pelil (Acacia nubica), talamogh (Acacia mellifera), or anyua (Acacia reficiens), which characterise the pastoral landscape today, have increased rapidly since the 1950s. This article compares perceptions of current changes in grass compositions with former accounts, highlighting local assessments of declining high-quality grasses such as abrute (Brachiaria deflexa, Setaria homonyma) or puyun (Eragrostis cilianensis). The changes described are linked to a number of causal factors (high grazing pressure, restriction of pastoral mobility, increasing population numbers), allowing us to historicise the profound change in landscape vegetation. The costs and benefits of bush encroachment are also examined. The tremendous increase in goat numbers, and the sizeable growth of camel herds, is closely connected to the increased availability of fodder plants for browsers. The article concludes by contrasting the views expressed on landscape by Pokot elders with scientific accounts of environmental change.
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