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Investigation of tropical coastal forest regeneration after farming and livestock grazing exclusion

Journal of Forestry Research 2019年第5期30卷 1873-1884页

作者： elly josephat ligate Chengzhen Wu Can Chen College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhou 350002People’s Republic of China Wuyi University Fuzhou 350002People’s Republic of China College of Forestry Fujian Agriculture and Forestry UniversityFuzhou 350002People’s Republic of China

It is critical to understand how forests regenerate after the exclusion of human induced disturbances because the regenerating species drive the renewal of resources and ecosystems,which in turn support human beings locally and *** study of forest regeneration was conducted in the tropical coastal forest ecosystems of Tanzania at Uzigua Forest Reserve(24,730 ha)in the Pwani *** collected data from adult trees in 47 sampling plots(25×25 m)randomly established in closed forest sites(control)and in sites disturbed by farming and livestock *** and seedling data were collected and analyzed in 2×2 m nested *** in the closed forest had higher mean basal area and volume for adult trees than those in sites disturbed by farming and livestock *** in sites disturbed by farming had the highest Shannon–Wiener index for seedlings and saplings,followed by closed forest and livestock grazed *** plots and farmed plots had higher Simpson’s index for seedlings and saplings than in grazed *** in farmed and livestock-grazed sites had a higher Simpson index for adult trees than in closed *** of seedlings and saplings was highest in closed forest sites,followed by farmed and livestock grazed *** disturbed by farming had higher equitability for adult trees than in livestock-grazed and closed ***,plots disturbed by farming and grazing had a higher importance value index for seedlings than in closed *** in closed forests had higher sapling importance values than in farmed and grazed ***,plots in closed forest had a higher importance value for adult trees than in farmed and grazed *** differences in tree species subcategories of regeneration across land-use indicates that farming and livestock grazing disturbances create heterogeneous microhabitats,which positively or negatively affects regeneration capacity of species after exclusion.

关键词： Coastal forests Disturbance Diversity Regeneration

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Evaluation of tropical coastal land cover and land use changes and their impacts on ecosystem service values

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Ecosystem Health and Sustainability 2018年第8期4卷 14-30页

作者： elly josephat ligate Can Chen Chengzhen Wu College of Life Sciences Fujian Agriculture and Forestry UniversityFuzhouFujianPR.China Department of Biosciences Sokoine University of AgricultureMorogoroTanzania College of Forestr Fyjian Agriculture and Forestry UniversityFuzhouP.R.China

Understanding about land cover and land use(LCLU)changes,as well as the associated impacts on ecosystem service values(ESV)is extremely important in the management of coastal ecosystems ***,this study assessed temporal LCLU changes,the underlying socio-economic drivers and dynamics of ESV in the coastal zone of *** LCLU data for 2000 and 2010 were from the Globe Land 30 mapping products at 30-meter spatial resolution developed by National Geomatics Center of China,while 2016 images were produced from Landsat *** of images was done from Landsat TM/ETM+for 2000,2010,and 2016 years complemented with MODIS and Normalized Difference Vegetation Index time series,and Chinese HJ *** categories and ecosystem service coefficients were used to compute ESV on each LCLU *** 2000 and 2016,farmland,shrub land,waterbody,and artificial surface expanded while forest,grazing land,and wetlands *** ESV increased on farmland,shrub land,and waterbody,while the decline was found on forest,grazing land,and *** ESV and the total population ratios declined from$80.4,63.8,and$46.0 million in 2000,2010,and 2016,*** positive correlation was on LCLU change and ESV,population and households in crop farming,livestock keeping,and bioenergy *** pressure and socioeconomic activities have amplified the degradation of the coastal *** not abetted,there is a danger of further impairments on these *** advise to regulate population and socioeconomic activities to avoid more negative impacts of coastal LCLU change.

关键词： Coastal ecosystems ecosystem service values land cover land use

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