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首页> 外文期刊>Open Journal of Ecology >Impact of Removal of Copper Leaf (&i&Acalypha fruticosa&/i& Forssk.) on Plant Species Diversity and Abundance at Chemeron, Baringo County, Kenya
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Impact of Removal of Copper Leaf (&i&Acalypha fruticosa&/i& Forssk.) on Plant Species Diversity and Abundance at Chemeron, Baringo County, Kenya

机译：去除铜叶（＆ i＆ Acalypha Fruticosa＆ / i＆）对植物物种的多样性和在Chemeron，Baringo County，Kenya的植物物种多样性和丰度

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Invasive plant species may significantly alter plant species community composition and structure thereby negatively impacting on ecosystem services. Their impacts on plant communities may be both direct and indirect. The direct effects may include a reduction in the abundance and diversity of palatable plant species that constitute important forage for livestock, wildlife, and medicines for the local communities. Declines in ecosystem resilience are of the notable indirect effects of invasive species. The aim of this study was to assess the impacts of a plant species, copper leaf ( Acalypha fruticosa ) on floral diversity and abundance at Chemeron, Baringo County in Kenya. The study was guided by three questions: What is the plant composition in terms of grasses, herbs, shrubs, and trees in the study area? Are there any variations in plant abundance between the two sites (sites with and without Acalypha fruticosa )? Are there variations in plant species diversity between the two study sites? Two sites (one with A. fruticosa and another two without this invasive species) were selected within the Chemeron Research Centre. Two belt transects measuring 100 m × 20 m on each site were laid parallel to each other. Plant samples were collected from five 1 m × 1 m quadrats that were laid at intervals of 20 m. The plant species or specimens were identified to the species level using available taxonomic keys. Various indices including Shannon-Wiener ( H ’), Evenness Index, Richness Index and Simpson’s Index of Diversity Index (SDI) were calculated. All the diversity, richness and evenness indices were considerably higher in the site without A. fruticosa compared to that where this invasive species was present. Higher H’ (3.14 to 3.21) and SDI (0.93 to 0.94) values were noted in sites without the invasive species compared to H ’ (2.11 to 2.20) and SDI (0.77 to 0.85) in sites with A. fruticosa present. Out of the 47 plant species identified, 39 and 20 of them occurred in the site without and with A. fruticosa , respectively. Further, there were more grasses ( Aristida keniensis , Cynodon dactylon , Brachiaria lucrantha , Eragrostis racemosa , and Enteropogon macrostachyus ) in the site without A. fruticosa compared to that with the invasive plant. The plants were also more evenly distributed in the site without A. fruticosa compared to that where the invasive plant was present. We conclude that A. fruticosa has a significant effect on plant species abundance and diversity as well as distribution. Its removal created a favourable environment for the growth of a variety of grasses. We therefore recommend to the agro-pastoralists and rangeland managers that A. fruticosa be mechanically removed by uprooting from grazing lands so as to increase forage availability and quality in the rangelands of South-Baringo.
机译：侵袭性植物物种可显着改变植物物种群落组成和结构，从而对生态系统服务产生负面影响。它们对植物群落的影响可能是直接和间接的。直接效应可能包括降低可口植物物种的丰富和多样性，这些物种构成牲畜，野生动物和当地社区的药品的重要饲料。生态系统恢复力下降是侵入物种的显着间接影响。本研究的目的是评估植物物种，铜叶（Acalypha Fruticosa）对肯尼亚的Baringo County的Chemeron花卉多样性和丰度的影响。这项研究由三个问题为指导：在研究区域的草，草药，灌木和树木方面是什么植物组成？两个地点之间的植物丰富是否存在任何变化（有和没有Acalypha Fruticosa的网站）？两项研究网站之间的植物物种多样性是否有变化？在Chemeron Research Center中，选择了两个网站（一个带A. Fruticosa和其他两个没有这种侵入物种的两种）。在每个部位上测量100m×20m的两个皮带横断面彼此平行。从5米×1M Quadrats收集植物样品，其间隔为20μm。使用可用的分类键将植物物种或标本鉴定到物种水平。计算了各种指数，包括Shannon-Wiener（H'），均匀指数，丰富指数和辛普森的分集指数（SDI）。除了存在这种侵入性物种的情况下，遗址的所有多样性，丰富性和均匀度指数都在没有A. Fruticosa的情况下得多。在没有侵入物种的位置，在没有侵入物种的情况下，在没有侵入物种的情况下，在没有侵袭物种的情况下，在存在与A. Fruticosa存在的地方的位置，在没有侵入物种的情况下，在没有侵入物种的情况下，在没有侵入物种的情况下，在没有侵入物种的情况下，较高的H'（3.14至3.21）值。在47种植物种类中，其中39和20种，在网站上发生，分别没有和A. Fruticosa。此外，在没有A. Fruticosa的网站上，还有更多的草（Aristida Keniensis，Cynodon Dactylon，Brachiaria Lucrantha，Eragrostis Haremosa和Enteropogon Macrostachyus）与侵入性植物相比。与存在侵入性植物的存在相比，植物也更均匀地分布于该地点。我们得出结论，A. Fruticosa对植物物种丰富和多样性以及分布具有显着影响。它的搬迁为各种草的生长带来了一个有利的环境。因此，我们推荐给农业牧民和牧场经理，即A. Fruticosa通过拔除放牧土地机械地拆除，以便在南方贝林岛的牧场上提高觅食的可用性和质量。

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