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Land use/land cover change and statistical modelling of cultivated land change drivers in Nigeria

機(jī)譯:尼日利亞的土地利用/土地覆被變化以及耕地變化驅(qū)動因素的統(tǒng)計模型

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In recent decades, human activities have significantly influenced land use/land cover. Identifying pattern changes in regional land use/land cover and their drivers is crucial for land use planning and management decision making. This study aims to (1) describe land use/land cover changes that have taken place in Nigeria in the study period of 10 years (2000-2010), (2) determine the factors that drive those changes with emphasis on transition to cultivated land use and (3) examine the spatiotemporal intensity of land use. The study utilized the GlobeLand30 land cover datasets produced by the National Geomatics Center of China. We used the spatial calculating analysis model to analyse land use/land cover change, logistic regression to model drivers of cultivated land expansion and land use intensity comprehensive index model to examine the intensity of land use. Our results revealed that (1) conversions to cultivated land dominate the land use/land cover change processes and expansion was largely at the detriment of the grassland, shrubland and forests; (2) biophysical, socio-economic and proximity factors are significant determinants of transition to cultivated land use. Population density is negatively related to cultivated land expansion, which suggests labour scarcity in the agricultural sector that can consequently result into low productivity and (3) significant discrepancies exist in the intensity of land use between the southern and northern regions of the country. Policy measures aimed at improving agricultural productivity remain one of the best ways to reduce pressure on increasingly scarce land resource and conserve natural ecosystems in Nigeria.
機(jī)譯:在最近的幾十年中,人類活動已經(jīng)極大地影響了土地利用/土地覆蓋。查明區(qū)域土地利用/土地覆被及其驅(qū)動因素的模式變化對于土地利用規(guī)劃和管理決策至關(guān)重要。這項(xiàng)研究的目的是(1)描述10年研究期間(2000-2010)尼日利亞發(fā)生的土地利用/土地覆蓋變化,(2)確定驅(qū)動這些變化的因素,重點(diǎn)是過渡到耕地使用和(3)檢查土地使用的時空強(qiáng)度。該研究利用了中國國家地理信息中心提供的GlobeLand30土地覆蓋數(shù)據(jù)集。我們使用空間計算分析模型來分析土地利用/土地覆蓋變化,采用邏輯回歸模型來模擬耕地擴(kuò)張的驅(qū)動力,并使用土地利用強(qiáng)度綜合指數(shù)模型來檢驗(yàn)土地利用的強(qiáng)度。我們的結(jié)果表明:(1)向耕地的轉(zhuǎn)化主導(dǎo)了土地使用/土地覆蓋的變化過程,而擴(kuò)張主要是對草地,灌木叢和森林的損害; (2)生物物理,社會經(jīng)濟(jì)和鄰近因素是向耕地利用過渡的重要決定因素。人口密度與耕地擴(kuò)張呈負(fù)相關(guān),這表明農(nóng)業(yè)部門的勞動力稀缺可能導(dǎo)致生產(chǎn)率低下;(3)該國南部和北部地區(qū)之間的土地利用強(qiáng)度存在重大差異。旨在提高農(nóng)業(yè)生產(chǎn)力的政策措施仍然是減輕尼日利亞日益稀缺的土地資源壓力和保護(hù)自然生態(tài)系統(tǒng)的最佳方法之一。

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