“Ordinary biodiversity” in western Burkina Faso (West Africa): what vegetation do the state forests conserve?
“Ordinary biodiversity” in western Burkina Faso (West Africa): what vegetation do the state forests conserve?
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布基纳法索西部（西非）的“普通生物多样性”：国家森林保护哪些植被？
DOI：
10.1007/s10531-008-9574-2
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发表时间：
2009
影响因子：
3.4
通讯作者：
Saïbou Nignan
中科院分区：
文献类型：
--
作者：
Jean;A. Fournier;Saïbou Nignan
通过考虑植物多样性的习惯和基本生物成分，评估了国家森林在布基纳法索西部（西非）草原环境保护中的作用。重点是“普通生物多样性”，它构成了目前的人口环境，并产生了他们的资源。比较了保护区内外景观单元的总体区系组成、α、β、γ多样性和物种积累曲线。根据其在景观单元中的分布频率和局部丰度对常见物种进行了鉴定。比较了功能性状（生命形态、分布等）和人类价值性状（当前用途、潜在威胁等）的发生情况。目前保护区外的土地利用对植物多样性的各个组成部分的影响不均衡。随着农业压力的增大，木本树种的物种丰富度和特定结构发生了更大的变化；相反，在广域物种比例增加的草本群落中，它们保持不变。有果实可食的木本树种在耕地上的有用植物保存明显，而木材和服务木的保存不明显。对于提供其他非木材产品（例如用作食物或饲料的叶子）的物种来说，它是缺乏的，在人为压力高的地方，对这些产品的保护可能会受到损害。鉴于目前的土地利用和动态，在土地利用规划中维持保护区对保护普通生物多样性至关重要。
The role of state forests in the conservation of the savannah environment of western Burkina Faso (West Africa) was assessed by considering the customary and fundamental biological components of plant diversity. The focus is on the “ordinary biodiversity” which constitutes the current environment of human populations and which generates their resources. Overall floristic composition, α, β, γ diversities and species accumulation curves of landscape units were compared inside and outside protected areas. Common species were identified according to their frequencies in landscape units and their local abundance. The occurrences of functional (life form, dispersion, etc.) and human-valued (current uses, potential threats, etc.) traits were compared. Current land uses outside protected areas have an unequal effect on the various components of plant diversity. Species richnesses and specific structures were all the more altered for woody species as agricultural pressure is high; conversely, they were maintained for herbaceous communities for which the proportion of wide-ranging species increased. The preservation of useful plant species on cultivated lands was obvious for woody species with edible fruits but less tangible for timber and service wood. It was deficient for species that furnish other non-wood products (e.g. leaves used as food or fodder), the conservation of which may be jeopardized where anthropic pressure is high. Given current land uses and dynamics, maintaining conservation areas in land use planning is crucial in order to preserve ordinary biodiversity.