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埃塞俄比亚提格雷州卡法谢拉罗国家公园的季节性土地利用/土地覆盖变化及其驱动因素

Seasonal land use/land cover change and the drivers in Kafta Sheraro national park, Tigray, Ethiopia.

作者信息

Temesgen Fitsum, Warkineh Bikila, Hailemicael Alemayehu

机构信息

Center for Environmental Sciences (Environmental Resources Conservation and Management), Addis Ababa University, P.O. Box: 1176, Addis Ababa, Ethiopia.

Plant Biology and Biodiversity Management and Environmental Sciences, Addis Ababa University, P.O. Box: 1176, Addis Ababa, Ethiopia.

出版信息

Heliyon. 2022 Dec 14;8(12):e12298. doi: 10.1016/j.heliyon.2022.e12298. eCollection 2022 Dec.

Abstract

Kafta Sheraro National Park (KSNP) has experienced rapid and consecutive destruction of dry woodland vegetation due to the influence of anthropogenic activities in the past three decades. However, to date, the change in woodland cover and its driving factors have not been addressed. This study aims to assess the spatial and temporal trends of land use/land cover change, seasonal vegetation cover change via the normalized difference vegetation index (NDVI), and human-induced drivers of change that occurred in the KSNP between 1988 and 2018 by using satellite imagery sensors (TM, ETM OLI), field observations, and local community interview data. The 2018 image results showed kappa coefficients of the dry season and wet season of 0.90 and 0.845, respectively. There was a continuous decline in woodland (29.38%) and riparian vegetation (47.11%) and an increasing trend in shrub bush land (35.28%), grassland (43.47%), bare land (27.52%), and cultivated land (118.36 km) over the thirty-year period. Moreover, the results showed that bare land expanded from wet to drier months, while cultivated land and grazing land increased from dry to wet months. Based on the NDVI results, high to moderate vegetation was decreased by 21.47%, while sparse and non-vegetation expanded by 19.8% and 1.7%, respectively. Settlement and agricultural expansion, human-induced fire, firewood collection, gold mining, and charcoal production were the major proximate drivers that negatively affected park resources. Around KSNP, the local communities' livelihood depends on farming (crop and livestock production). This expansion of farming is the main driver of woodland depletion, which leads to increased resource competition and a challenge for the survival of wildlife. , urgent sustainable conservation of park biodiversity by encouraging community participation in conservation practices and preparing awareness creation programs should be mandatory.

摘要

在过去三十年中,由于人为活动的影响,卡法谢拉罗国家公园(KSNP)经历了干旱林地植被的迅速且持续的破坏。然而,迄今为止,林地覆盖的变化及其驱动因素尚未得到研究。本研究旨在通过使用卫星图像传感器(TM、ETM OLI)、实地观测和当地社区访谈数据,评估1988年至2018年期间KSNP内土地利用/土地覆盖变化的时空趋势、通过归一化植被指数(NDVI)得出的季节性植被覆盖变化,以及人为导致的变化驱动因素。2018年的图像结果显示,旱季和雨季的卡帕系数分别为0.90和0.845。在三十年期间,林地(减少29.38%)和河岸植被(减少47.11%)持续减少,而灌木丛林地(增加35.28%)、草地(增加43.47%)、裸地(增加27.52%)和耕地(增加118.36平方公里)呈增加趋势。此外,结果表明,裸地从湿润月份向干燥月份扩展,而耕地和放牧地则从干燥月份向湿润月份增加。基于NDVI结果,高至中度植被减少了21.47%,而稀疏植被和无植被分别增加了19.8%和1.7%。定居点和农业扩张、人为引发的火灾、柴火采集、金矿开采和木炭生产是对公园资源产生负面影响的主要直接驱动因素。在KSNP周边,当地社区的生计依赖于农业(作物和牲畜生产)。这种农业扩张是林地枯竭的主要驱动因素,导致资源竞争加剧,对野生动物的生存构成挑战。因此,迫切需要通过鼓励社区参与保护实践和制定提高认识计划,对公园生物多样性进行可持续保护。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/423b/9834715/47ca0baad6bd/gr1.jpg

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