Diversity and occurrence of herbaceous communities in West African savannas in relation to climate, land use and habitat

Diversity and occurrence of herbaceous communities in West African savannas in relation to climate, land use and habitat
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西非稀树草原草本群落的多样性和发生与气候、土地利用和栖息地的关系

DOI:
10.1007/s12224-017-9303-2
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发表时间:
2018
期刊:
影响因子:
1.2
通讯作者:
Thiombiano
Thiombiano
中科院分区:
生物学4区
文献类型:
--
作者:
Bernhardt-Römermann;Ouédraogo;Thiombiano

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面对当前土地利用和气候的变化以及栖息地的破坏,研究草本植被作为稀树草原生态系统变化的指标是很重要的。我们调查了气候,土地利用和栖息地,单独和组合,对西非稀树草原草本植物群落的多样性和发生的影响。在布基纳法索的植物区系数据和环境变量进行了采样,并进行排序和指示种分析,以探讨在9种植被类型的变化。回归分析表明,气候、土地利用、湿度梯度、土壤质地和植被结构是草本植物群落的主要判别因子。气候、生境及其相互作用对这些群落的发生影响最大。物种丰富度的变化主要是由于气候,土地利用及其相互作用,这是更重要的增加,而不是减少多样性。在所有情况下,气候条件仍然是驱动西非热带稀树草原植被变化的最重要的环境因素。除此之外,生境退化与土地利用和气候条件相互作用的影响表明,土地利用是对草本植被多样性的威胁。
In the face of the current changes in land use and climate as well as habitat destruction, it is important to study herbaceous vegetation as an indicator of changes occurring in savanna ecosystems. We investigated the effects of climate, land use and habitat, both alone and in combination, on the diversity and occurrence of West African savanna herbaceous plant communities. Floristic data and environmental variables were sampled in Burkina Faso and subjected to ordination and indicator species analysis to explore the variation in nine vegetation types. Regression analyses showed that climate, land use, humidity gradient, soil fraction and vegetation structure discriminate herbaceous plant communities. Climate, habitat and their interaction had the greatest effect on the occurrence of these communities. Changes in species richness of the studied communities were mainly due to climate, land use and their interaction, which were more important for increasing rather than decreasing diversity. In all cases, climate conditions remained the most important environmental factor driving vegetation variation in West African savannas. Beside this, the effects of habitat degradation in interaction with land use and climatic conditions indicate land use to be a threat for the diversity of the herbaceous vegetation.
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