肯尼亚卢米河沿岸生态系统的土地利用和土地覆盖变化:对当地生计的影响

Leila Ndalilo, E. Maranga, B. Kirui
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引用次数: 0

摘要

河岸林最大限度地减少了土地退化对河流生态系统的影响,并为人类提供了直接和间接的利益。然而,这些生态系统受到土地利用变化导致的退化和森林砍伐的威胁。肯尼亚Taita Taveta县的卢米河河岸生态系统在过去三十年中,由于经济、体制和人口因素,经历了迅速而广泛的土地利用变化。土地利用变化导致的河岸退化对当地生计产生深远影响,这一问题日益引起人们的关注。研究了1987 - 2019年鲁米河河岸生态系统土地利用和土地覆盖的变化模式。这项研究的目的是确定土地利用和土地覆盖变化对当地生计的影响。利用陆地卫星影像对鲁米河生态系统上游、中下游的Njukini、Chala和Mboghoni地区353户家庭的土地利用和土地覆盖变化进行了评估,并收集了社会经济数据。研究证据表明,1987 - 2019年,农田、聚落和水体面积分别增加了20.5%、112.1%和2.3%,而森林斑块、放牧地和河流植被面积分别减少了52.7%、3.0%和36.6%。周边地区人口的增加,加上河岸地区因种植作物和放牧牲畜而受到侵占,导致河岸森林斑块/植被和相关生物多样性的丧失
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Land Use and Land Cover Change along River Lumi Riparian Ecosystem in Kenya: Implications on Local Livelihoods
Riparian forests minimize impacts of land degradation on stream ecosystems and provide direct and indirect benefits to people. However, these ecosystems are threatened by degradation and deforestation attributed to land use changes. River Lumi riparian ecosystem in Taita Taveta County in Kenya has experienced rapid and extensive land use changes over the past three decades in response to economic, institutional and demographic factors. There is growing concern of riparian degradation attributed to land use change with far reaching implications on local livelihoods. A study was conducted to examine the patterns of land use and land cover change along River Lumi riparian ecosystem between 1987 and 2019. The aim of the study was to ascertain the impacts of land use and land cover change on local livelihoods. Landsat images were used to assess land use and land cover change while socio-economic data was collected from 353 households in Njukini, Chala and Mboghoni located in the upper, middle and lower sections of River Lumi ecosystem respectively. Research evidence authenti-cated that the area under farmlands, settlement and water body increased by 20.5%, 112.1% and 2.3% respectively between 1987 and 2019 while area under forest patches, grazing land and riverine vegetation decreased by 52.7%, 3.0%, and 36.6% respectively. The increase in population in surrounding areas coupled with encroachment of the riparian areas for crop farming and livestock grazing resulted to loss of riparian forest patches/ vegetation and associated biodiversity
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