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Urbanization,economic development,and environmental changes in transitional economies in the global south:a case of Yangon

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Ecological Processes 2022年第1期11卷 929-945页

作者： Peilei Fan Jiquan Chen Cadi Fung Zaw Naing Zutao Ouyang khaing moe nyunt Zin Nwe Myint Jiaguo Qi Joseph P.Messina Soe W.Myint Brad G.Peter School of Planning Designand Construction and Center for Global Change and Earth ObservationsMichigan State UniversityEast LansingMI 48824USA Department of Geography Environmentand Spatial Sciences and Center for Global Change and Earth ObservationsMichigan State UniversityEast LansingMI 48824USA Department of Geography University of AlabamaTuscaloosaAL 35487USA Mandalay Technology YangonMyanmar Earth System Science Stanford UniversityStanfordCA 94305USA Yangon City Development Committee YangonMyanmar Yangon University YangonMyanmar College of Arts and Sciences University of AlabamaTuscaloosaAL 35487USA School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZ 85287-5302USA Department of Geosciences University of ArkansasFayettevilleAR 72701PUSA

Background:Transitional economies in Southeast Asia—a distinct group of developing countries—have experienced rapid urbanization in the past several decades due to the economic transition that fundamentally changed the function of their economies,societies and the ***,one of the least developed transitional economies in Southeast Asia,increased urbanization substantially from 25%in 1990 to 31%in ***,major knowledge gaps exist in understanding the changes in urban land use and land cover and environment and their drivers in its ***:We studied Yangon,the largest city in Myanmar,for the urbanization,environmental changes,and the underlying driving forces in a radically transitioned economy in the developing *** on satellite imagery and historic land use maps,we quantified the expansion of urban built-up land and constructed the land conversion matrix from 1990 through *** also used three air pollutants to illustrate the changes in environmental *** analyzed the coupled dynamics among urbanization,economic development,and environmental *** conducting a workshop with 20 local experts,we further analyzed the influence of human systems and natural systems on Yangon’s urbanization and ***:The city of Yangon expanded urban built-up land rapidly from 1990 to 2000,slowed down from 2000 to 2010,but gained momentum again from 2010 to 2020,with most newly added urban built-up land appearing to be converted from farmland and green land in both 1990–2000 and 2010–***,the air pollutant concen-tration of CO decreased,but that of NO_(2)and PM_(2.5)increased in recent years.A positive correlation exists between population and economic development and the concentration of PM_(2.5)is highly associated with population,the economy,and the number of ***,the expert panel also identified other potential drivers for urbanization,including the extreme climate event of Cyclone Nargi

关键词： Urbanization Economic development Environmental change Transitional economy Globalization Extreme climate event Capital relocation Myanmar

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Floristic Composition, Structure and Soil Properties of Mixed Deciduous Forest and Deciduous Dipterocarp Forest: Case Study in Madan Watershed, Myanmar

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American Journal of Plant Sciences 2016年第2期7卷 279-287页

作者： Kyaw Kyaw Myo San Thwin nyunt khaing Forest Department Head Office of Ministry of Environmental Conservation and Forestry Nay Pyi Taw Myanmar Department of Forestry University of Forestry Yezin Nay Pyi Taw Myanmar

Patterns of woody regeneration in terms of species composition and diversity were studied in mixed deciduous forest (MDF) and deciduous dipterocarp forest (DDF) in Minbyin reserved forest of Lewe Township. A total of 57 plant species of MDF belonging to 28 families and 342 individuals and 25 plant species of DDF consist of 15 families and 285 individuals were identified. Plant species diversity was quantitatively higher in the MDF (H' = 3.68) compared to the DDF (H' = 2.39). Tectona grandis showed the highest density (30), dominance (4.40 m2) and IVI (27.01) of MDF and Dipterocarpus tuberculatus also composed the highest density (109), dominance (9.02 m2) and IVI (81.87) in DDF. The smallest diameter class (10 - 20 cm) comprised with 29 species, 103 individuals in MDF and 18 species, 85 individuals in DDF. The size class distribution displayed a reverse J-shaped pattern. The largest numbers of species were concentrated in the smallest height class in both investigated forests because of height and diameter distribution is closely related. The total densities of seedlings and saplings were 1219 and 531 ha-1 in MDF and 988 and 444 ha-1 in DDF respectively. Although soil texture of (40 - 50 cm) and (90 - 100 cm) were sandy clay loam in mixed deciduous forest, the other layers of both investigated forests were sandy loam.

关键词： Floristic Composition and Structure Mixed Deciduous Forest Deciduous Dipterocarp Forest Regeneration Soil Properties

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