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Vegetation dynamics in response to human and climatic factors in the tanzanian Coast

Frontiers of Earth Science 2021年第3期15卷 595-605页

作者： Herrieth MACHIWA Bo TIAN Dhritiraj SENGUPTA Qian CHEN Michael MEADOWS Yunxuan ZHOU State Key Laboratory of Estuarine and coastal Research East China Normal UniversityShanghai 200241China University of Dar es Salaam College of Information and Communication TechnologiesDepartment of Computer Science and EngineeringDar es Salaam 33335Tanzania Key Laboratory of Geographic Information Science(Ministry of Education) School of Geographical SciencesEast China Normal UniversityShanghai 200241China Department of Environmental&Geographical Sciences University of Cape TownRondebosch 7701South Africa College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua 321004China

This study of vegetation dynamics in the coastal region of tanzania provides a fundamental basis to better understand the nature of the factors that underlie observed *** tanzanian coast,rich in biodiversity,is economically and environmentally important although the understanding of the nature and causes of vegetation change is very *** paper presents an investigation of the relationship between vegetation dynamics in response to climate variations and human activities using Moderate Resolution Imaging Spectro-radiometer(MODIS),Normalized Difference Vegetation Index(NDVI),meteorological,and Globeland30 Landsat data ***-temporal trends and the relationship of NDVI to selected meteorological variables were statistically analyzed for the period 2000-2018 using the Mann-Kendall test and Pearson correlation *** results reveal a significant positive trend in temperature(/?>0,Z=2.87)and a non-significant trend in precipitation(|Z|tanzania has therefore experienced increased temperatures and variable moisture conditions which threaten natural vegetation and ecosystems at *** land cover maps obtained from GlobeLand30 were analyzed to identify the nature and scale of human impact on the *** analysis of land use and land cover in the region reveals an increase in cultivated land,shrubland,grassland,built-up land and bare land,while forests,wetland and water all decreased between 2000 and *** decrease in forest vegetation is attributable to the fact that most livelihoods in the region are dependent on agriculture and harvesting of forest products(firewood,timber,charcoal).The findings of this study highlight the need for appropriate land-use planning and sustainable utilization of forest resources.

关键词： remote sensing NDVI climate variations spatio-temporal changes LULCC coastal tanzania

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