Effect of Forest Coffee Management Practices on Woody Species Diversity and Composition in Bale Eco-Region, Southeastern Ethiopia

Gonfa Kewessa, Lemma Tiki, Dejene Nigatu, Demeke Datiko
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引用次数: 3

Abstract

Forest coffee areas are hotspots areas for conservation of biodiversity due to anthropogenic effect on diversity and abundance of indigenous species. This study was aimed to determine the effect of forest coffee management on woody species diversity and composition. The study was conducted in Dellomena and Harenna Buluk districts where natural forest and forest coffee are found adjacently. Systematic sampling method was used to collect woody species data from 16 transect lines. Eighty (80) sample quadrats of 20 m × 20 m quadrat size for mature trees/shrubs and five 5 m × 5 m subplots within each quadrat for saplings and seedlings were used. Forty-seven species of 29 families and 39 species of 24 families were recorded in natural forest and forest coffee areas respectively. Woody species frequently recorded in most of the sample plots were Celtis africana (100%), Podocarpus falcatus (95%), Strychnos mitis (95%), Diospyros mespili-formis (95%) and Diospyros abyssinica (90%) in the natural forest, and Celtis africana (95%) and Podocarpus falcatus (95%) in the forest coffee. Woody species richness (P = 0.000), Shannon diversity (P = 0.000), Simpson diversity indices (P = 0.02) and dominance (P = 0.02) were sig-nificantly varied between the two forests. This findings revealed significantly higher woody species diversity and richness in natural forest than forest coffee. Negative effects were noticed due to coffee management practices on woody species diversity and composition in forest coffee areas. Hence, reducing the human pressure on forest coffee via awareness raising and training on the effect of coffee management activities and introduction of environmentally friendly forest coffee management techniques are crucial to maintain ecological service and economic benefit of the forest coffee.
埃塞俄比亚东南部贝尔生态区森林咖啡管理实践对木本物种多样性和组成的影响
森林咖啡区是保护生物多样性的热点地区,因为人为因素对土著物种的多样性和丰度产生了影响。本研究旨在确定森林咖啡管理对木本物种多样性和组成的影响。这项研究是在Dellomena和Harenna Buluk地区进行的,那里毗邻天然森林和森林咖啡。采用系统抽样方法对16条样带的木本植物进行了调查。对于成熟树木/灌木,使用了80个20 m×20 m样方大小的样本样方,对于树苗和幼苗,每个样方中使用了5个5 m×5 m的子样方。天然林和森林咖啡区分别记录了29科47种和24科39种。在大多数样地中经常记录的木本物种是天然林中的非洲凯尔特人(100%)、镰形罗汉果(95%)、马钱子(95%),中毛薯蓣(95%)和深海薯蓣(90%),以及森林咖啡中的非洲塞尔特人(95%)与镰形罗汉果(95%)。林地物种丰富度(P=0.000)、香农多样性(P=0.000。这一发现表明,天然林中的木本物种多样性和丰富度明显高于森林咖啡。咖啡管理实践对森林咖啡区木本物种多样性和组成产生了负面影响。因此,通过提高对咖啡管理活动效果的认识和培训,以及引入环保的森林咖啡管理技术,减轻人类对森林咖啡的压力,对于维持森林咖啡的生态服务和经济效益至关重要。
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