The geopolitical economy of Thailand's marine plastic pollution crisis

Currently approximately 9 million tons of plastic enter the world's oceans annually. This is a major transboundary problem on a global scale that threatens marine wildlife, coastal ecologies, human health and livelihoods. Our concern in this paper is with the environmental governance of marine plastic pollution that emanates from Thailand, the sixth biggest contributor globally. By zooming in on land‐based polluters in Thailand, we highlight both the systemic nature of the marine plastic problem and the relative impunity with which drivers of transboundary environmental harm function at all levels of governance. Drawing from 19 interviews conducted with actors from the public, private and non‐profit sectors, we examine three stages of the problem: production, consumption and waste management. We found that three major barriers prevent Thailand's government, private sector and citizens from engaging in the sort collective action needed to reduce marine plastic pollution. They are: (i) insufficient incentives to enact political change; (ii) scalar disconnects in waste management; and (iii) inadequate public and private sector ownership over plastic waste reduction. As the state alone cannot change corporate and consumer behaviour, we argue that multi‐stakeholder efforts across organisational scales of governance and administrative boundaries are needed to address the barriers.     

Greenhouse gas implications of replacing fish protein with beef in the lower Mekong Basin

At least 88 new hydropower dams are planned between 2010 and 2030 in the lower Mekong River basin in Southeast Asia as a source of electricity with lower greenhouse gas emissions. Dams result in declines in fish populations that will need to be replaced with other sources of protein for food security. We make the first assessment of emissions should beef production substitute for lost fish in Cambodia and Laos. We assessed two sources of emissions. Replacing lost fish with beef would require as much as 12 million hectares of new pasture. Forest clearing for pastures in Cambodia and Lao PDR would initially emit between 0.859 and 3.015 giga‐tonnes of carbon dioxide equivalents (Gt CO₂‐eq.). Methane emissions from additional cattle would add at least 0.0013 Gt CO₂‐eq./year to Cambodia's total greenhouse gas emissions, equivalent to a 20% increase. In Laos at least 0.0005 Gt CO₂‐eq./year would be released, a 4–12% increase in annual emissions. We demonstrate that activities displaced by hydropower developments could significantly increase emissions. It shows how enclosure of commons at local scales impacts upon other common pool resources at different scales, raising questions for sustainable and equitable transboundary governance.     

From Southwest China into Upper Indochina: an overview of Hmong (Miao) migrations

From southern China through mountainous Vietnam, Laos and eventually as far south as the Chao Phraya basin in Thailand, groups of Hmong swiddeners were seen migrating during the late 19th and early 20th centuries. When, and under what circumstances did large chunks of this sub-group of the Miao from Guizhou and its periphery move their settlements to the southern part of the continental Southeast Asia Massif? Who were they? What was their history before these migrations? This paper makes use of early evidence to shed some light on the main causes of that march into the mountain ranges of the Peninsula.     

Large Dams,Restructuring and Regional Integration in Southeast Asia

Large dams are a dramatic intervention affecting ecosystems, livelihoods and resource use, notably in upland areas. Dams are significant, both in terms of their scale of impact and due to their role in appropriating part of the upland resource base for mainly lowland and urban beneficiaries. Whereas in the past the tensions associated with impact of dams in Southeast Asia have been played out within national borders, mainly in Thailand, the new impetus for dam construction reflects an internationalised agenda — namely integration of the mainland Southeast Asian regional resource economy. This paper examines the background to large dam construction in mainland Southeast Asia, current and projected developments, and their implications in a number of arenas. Case studies from Lao PDR, Thailand and Vietnam illustrate the main points. It is shown that political­economic restructuring associated with the changing geopolitics of the region is a major influence on the revived agenda for large dam construction, and that such restructuring modulates the direct and indirect impacts of dams at local, national and regional levels.     

How transboundary processes connect commons in Japan and Thailand: A relational analysis of global commodity chains and East Asian economic integration

In this paper, with a focus on Japan and Thailand, we outline a relational environmental and economic history of East Asian economic integration (EAEI) and its implication for the commons in both places. We draw attention in particular to global commodity chains as relational processes not only of trade and investment, but also geopolitics and aid, to argue that these transborder processes have connected together commons in distant localities resulting in their simultaneous enclosure, dispossession and (re‐)commoning with implications for community vulnerabilities in positive and negative ways. To demonstrate this argument we analyse three periods of EAEI: the late nineteenth century until World War II, when Japan and Thailand both began to modernise and new trade and geopolitical relations emerged in the context of colonialism; the post‐World War II recovery until the Plaza Accord in 1986, during which time Japan rapidly industrialised, as did Thailand to a lesser extent and regionalism was largely defined by US hegemony; and the post‐Plaza Accord period, when Japan deindustrialised its labour intensive manufacture and heavy industry and Thailand rapidly industrialised and EAEI became defined by new and intensified global commodity chains.     

Is environmental regulation a blessing or a curse for China's urban land use efficiency? Evidence from a threshold effect model

Severe land shortage causes a higher demand for domestic and foreign land‐intensive products. As a result, resource utilization, and related environmental issues, will increase in urban areas. To this respect, the analysis of the impact of environmental regulation on urban land use efficiency helps to identify potential points for interventions designed to ensure sustainable land use. This study first introduces a theoretical framework to investigate the micro‐transmission mechanism of environmental regulation on urban land use efficiency. Our profit decision‐making model concludes that the impact of environmental regulation on urban land use efficiency is influenced by changes in the industrial structure. Empirically, our preliminary analysis suggests that in addition to population density, both formal and informal environmental regulation can promote urban land use efficiency, with a significant spatial heterogeneity across the sample regions. Further, this study shows a remarkable double‐threshold relationship between formal environmental regulation and urban land use efficiency in China. We clarify and confirm that environmental regulation promoted urban land use efficiency only when regulation intensity was higher than 0.8612. Environmental regulation increased urban land use efficiency in high‐level industrial rationalization areas, whereas it had the opposite effect in low‐level ones. Furthermore, there was a clear marginal diminishing effect of the impact of environmental regulation on urban land use efficiency when the optimization of the industrial structure was set as a threshold variable.     

Geographical scale,industrial diversity,and regional economic stability

This paper compares the empirical relationship between industrial diversity and economic stability across different geographical scales, including counties, states, Economic Areas, and Metropolitan Statistical Areas, in the contiguous U.S. between 2000 and 2014. It is found that this relationship varies greatly when it is analyzed across these four geographical scales. Meanwhile, several scale‐related problems, such as the modifiable areal unit problem and the small population problem, are introduced to economic diversity literature and further discussed with this variability of the diversity–stability relationship. This paper concludes that the spatial scale problem as well as the optimal unit can be study dependent. Thus, when choosing analytical units to quantify regional economic structure for a specific study, future research should pay attention to scale‐related problems.     

Resource Flows and the Decomposition of Regional Inequality in the Beijing–Tianjin–Hebei Metropolitan Region, 1990–2004

This paper introduces a new way of decomposing regional inequality. It divides the Beijing–Tianjin–Hebei metropolitan region into three sets of districts in terms of the urban–rural resource flows: urban, peri‐urban, and peripheral areas. Unlike the administrative divisions, these three sets of districts show how resource flows and agglomerates at the regional level. The paper decomposes regional inequality according to the three sets of districts. The paper's findings show that regional inequality decreased between 1990 and 1994, after which it remained steady. The study, for the first time, brings peri‐urban areas into a regional decomposition analysis, and contributes to the understanding of urban–rural resource flows and inequality changes at the regional level.     

Reclaiming community spaces in the Mekong River transboundary commons: Shifting territorialities in Chiang Khong,Thailand

In Northern Thailand's Chiang Khong district, which lies along the banks of the Mekong River and the Thai‐Lao border, an community‐based environmental movement under the leadership of the Rak Chiang Khong conservation group emerged in response to processes that have appropriated territories traditionally used by locals for state‐led economic exploitation. The Rak Chiang Khong has put up fierce opposition to large‐scale development projects such as the China‐led navigation project, which planned to blast ecologically and culturally significant rapids, and hydropower dam development along the Mekong River. As a result, local‐level governance arrangements of the transboundary commons in Chiang Khong have shifted to counter threats both within and beyond the borders of Thailand. Through adapting fishing arrangements, engaging in community‐led research and establishing village conservation zones, overlapping forms of territorialisation have emerged in response to socio‐ecological changes to the river. These new forms of territorialisation are produced by complex configurations of political, cultural, and ecological histories, politicaleconomic changes, and transboundary dynamics. These territorial strategies have been key towards reclaiming the transboundary commons of the Mekong River for riparian communities, and providing a deeper understanding of the values that drive community involvement in the transboundary environmental governance of the Mekong River.     

The spatial-temporal evolution of urban development patterns in Chinese cities: Dynamics and interpretations

This paper examines the spatial-temporal evolution of urban spatial structure across 269 Chinese prefectural cities from 2002 to 2019. Our analysis identifies a consistent trend toward a more polycentric configuration in the 25 Chinese mega-cities during this period, primarily due to population growth and a supportive policy environment. However, the evolutionary pathways of small- and medium-sized cities unfolded in a rather complex and diverse manner, with some becoming more polycentric while the majority adhering to a monocentric trajectory. In these cases, population growth is usually associated with a more monocentric pattern, characterized by rapid expansion of the urban core, while polycentric development is primarily attributed to specific spatial policies that support the emergence of subcenters. We conclude that polycentric development, while potentially suitable for mega-cities to alleviate diseconomies of scale, may be less appropriate for small- and medium-sized cities as it may constrain growth associated with agglomeration economies. We suggest that the development and implementation of regional spatial policy should be considerate of local historical paths and contextual factors. Finally, we propose a stylized framework to more accurately reflect the diverse and complex nature of urban spatial structure evolution in Chinese prefectural cities.     

The patterns and driving forces of uneven regional growth in ASEAN countries: A tale of two Thailands' path toward regional coordinated development

Uneven development has long been a critical issue in geography and urban studies, leading to economically inefficient urbanization, environmentally unbalanced regions, and socially unequal livelihoods. As one result, primate cities and urban primacy form within a hierarchical urban system, to which urban and regional planning must positively respond. It is worth noting that Thailand has experienced a number of important urbanization issues related to developing countries, such as semicolonialism and internal colonialism. This study aims to investigate regional uneven development based on primacy theory and the rank‐size rule, which are common in most Asian and developing countries. We examined the urbanization processes in Thailand, from 2000 to 2015, by looking at factors of population, GDP, land use, transportation networks, and nighttime light, which provide very recent regional development patterns. The second set of analyses explained the degree of primacy among different provinces and their ranking hierarchies. By presenting the persistent disparities of contemporary urbanization in Thailand and exploring its driving forces, this study offers insights into planning and policy and underscores the importance of regional coordinated development for achieving sustainable urbanization in Southeast Asian countries.     

城市建设强度与热岛的相关性——以重庆市开州区为例

城市建设强度是城市热岛形成与演变的主要驱动因素,为了揭示两者之间的量化关系,以重庆市开州区为例,在用地地块、规则网格和建筑斑块3个空间尺度上,使用ArcGIS提取地表温度（LST）与建设强度指标,利用SPSS分析其相关性并构建多元回归模型。结果表明：用地地块尺度上,LST与绿化率、建筑密度和容积率之间均呈现显著的负相关,与建筑底面积和总建筑面积之间均呈现显著的正相关。规则网格尺度序列上,LST与建设强度各指标之间的相关性系数随网格面积的增大而增大,在840 m网格时达到最大值;总体上LST与绿化率之间呈显著的负相关,与建筑密度和容积率之间呈显著的正相关。建筑斑块的尺度上,LST与建筑层数之间有显著的负相关关系,与总建筑面积之间有显著的正相关关系。城市建设强度直接或间接影响了城市热岛的形成与演变,而相关分析发现,建设强度指标并非都与LST之间呈正相关关系,这表明城市热岛除受建设强度的影响外,还受区域气候、城市形态、城市性质、交通方式以及建筑材质与色彩等多种因素的协同影响,是一个非线性的复杂过程。     

不同尺度下城市绿地景观格局与连通性研究

城市绿地是关系城市可持续发展的重要环境因素,开展城市绿地景观格局特征研究是景观生态学研究的重点和热点。以长沙城市绿地景观作为研究对象,结合地理信息系统及遥感技术探讨景观格局与连通性指数随粒度增加的变化特征。研究结果表明：（1）随着粒度增加,各景观格局指数均具有尺度效应,且具有明显或不明显的尺度转折点;第一尺度域是选择适宜粒度的较好取值范围。本研究中景观指数计算的适宜粒度范围是80~90 m。（2）斑块的相对重要性尺度效应不显著。随着物种运动能力越强,斑块分级的尺度效应减小。连通性指数IIC和PC值也不具有较强的尺度依赖性。（3）长沙市绿地景观的连通性不高,景观中连通性重要值较大的大型斑块数量较少,且分布不均衡,有待今后规划改善。     

Fixing flammable Forest: The scalar politics of peatland governance and restoration in Indonesia

Peatland fires and the impact of transboundary haze are often intertwined with socio‐environmental externalities of neoliberal forest governance and overlapping systems of resource property rights in Indonesia. New peatland governance strategies are emerging to address fires and haze by reorganising peatland management using a more ecologically relevant scale that territorialises peatland according to its hydrological characteristics. Employing the concept of the eco‐scalar fix, this paper interrogates rescaling peatland governance as a strategy to address the socio‐ecological crisis associated with the conversion of peatland into mono‐agricultural land. However, rescaling peatland governance entails the risk of merely displacing socio‐environmental crises to areas considered less ecologically important rather than addressing them. Drawing on a case study of a peatland restoration in Riau, Indonesia, this paper shows how emerging hybrid forms of peatland governance can address the environmental externalities that have unintentionally been created. This hybrid form of peatland governance has pressured actors across multiple types of property to rework the ways that environmental commons are controlled and accessed.     

The throughgoing urbanisation of East and Southeast Asia

The image of East and Southeast Asia is of a predominantly rural region, with the exception of Japan. This image no longer reflects reality. Although in 2000 the proportion of the population living in areas officially defined as urban will still be below 40 percent, this understates the degree to which populations throughout the region have, in terms of employment, ease of transport and communications, been brought into a close relationship with urban areas. Not only this, but the region already has eight of the world’s 21 megacities — cities with populations exceeding eight million. Urbanised corridors are emerging in parts of the region, in some cases cutting across national boundaries. Some implications for the future are discussed: the growth of a truly urban proletariat, the influence of megacities on political change, the ending of rural isolation, and regional development and income inequality issues.     

The geographically variegated connections of the Jakarta metropolitan area as produced by manufacturing firms

Connectivity in urban networks is often deemed to be an important feature of economically vibrant cities. Under conditions of contemporary globalization, the importance and geographies of these connections are increasingly variegated. Accordingly, various attempts have been made to analyse the external relations of cities and metropolitan regions, often through the lens of multilocational firms. Our purpose in this paper is to address the to‐date limited empirical knowledge about whether firms originating from different regions (i.e., firms with different headquarter [HQ] locations) create different patterns of inter‐urban relations. Drawing on the interlocking network model and using the Jakarta metropolitan area (JMA) as a case study, this paper explores how manufacturing firms with HQs either inside (further differentiating between the JMA and other cities) or outside (further differentiating between East Asian and non‐East Asian countries) Indonesia produce different patterns of external relations. Our findings indicate that each category of firms generates unique configurations of interurban relations for the JMA at the global and national scales. We argue that these variegated networks patterns not only reflect different locational strategies of firms, but also Indonesia's evolving policy orientations which have complex relations with evolving patterns of economic globalization.     

IBA、B12及纵切对东方百合索邦鳞片扦插繁殖的影响

为了研究外源激素及切割方式对东方百合‘索邦’鳞片扦插繁殖的影响,本试验以东方百合‘索邦’鳞片为试验材料,按不同浓度外源激素IBA、B12和纵切方式处理进行扦插试验。结果表明：200 mg/L的外源激素IBA处理,小鳞茎发生率、繁殖系数、直径、根数、根长都显著高于100、300 mg/L浓度处理;200 mg/L IBA＋5 mL B12处理,小鳞茎发生率、繁殖系数、直径均显著高于未给予B12处理的鳞片,但生根数与根长显著低于200 mg/L的IBA处理;对鳞片进行纵切,切割处理后的鳞片小鳞茎发生率、繁殖系数、直径、根数、根长都显著高于未切割的鳞片。因此,一定浓度的外源IBA、B12及纵切处理能促进小鳞茎的发生,提高繁殖系数,增加根数、根长。     

Practices of place‐making: Globalisation and locality in the Philippines

Abstract: Global flows of people and information in the Asia–Pacific region are creating new forms of place that stretch across national boundaries and rural–urban distinctions. These new mobile forms of place link long‐inhabited rural areas to cities, national centres, and to rural frontiers within the nation. Here, we describe new forms of place that are being produced by contemporary migration and economic change, using data from the Philippines and applying Appadurai's theorisation of translocality. Our analysis links these flows of overseas migrants to concomitant processes of economic change, migration and new rural livelihoods. We outline changing practices of place within the Philippines, exploring ways that transnational migration can articulate with apparently ‘local’ development and the flow‐on effects from migration on the spatial patterns of rural livelihoods.     

The relationship between China's income inequality and transport infrastructure,economic growth,and carbon emissions

Since the beginning of the 21st century, accompanied by the tremendous achievements of China's economic growth is an increasingly severe income gap between the rich and the poor. Based on panel data from 2000 to 2018, this study systematically examined the relationship among transport infrastructure, economic growth, carbon emissions, and income inequality in China, using the panel vector autoregressive model estimated by the generalized method of moments. We further divided China into three regions to investigate the regional heterogeneity of these relationships. The results show a long‐run equilibrium relationship between transport infrastructure, economic growth, carbon emissions, and income inequality. Income inequality in the previous year significantly affects that in the current year positively. Whether at the national or regional level, economic growth affects income inequality negatively. For the national sample, the highway reduces income inequality, while the railway increases income inequality. For both the subsamples and the national sample, carbon emissions significantly increase income inequality and are the Granger test cause for income inequality. Furthermore, we discuss some of the possible mechanisms of these results. Our findings generate policy implications for reducing income inequality in regard to economic growth, transport infrastructure, and carbon emissions.     

Scaling the environmental commons: Broadening our frame of reference for transboundary governance in Southeast Asia

The transboundary environmental commons in Southeast Asia are normally conceived in terms of shared resources and environmental impacts that transcend national borders. The Mekong's ‘fugitive resources’ of water, fish and sediment and the issue of Indonesia's smoke haze drift into Malaysia and Singapore dominate discussion. Assumed national interests shape actors and institutional arrangements for transboundary commons governance. Failure to address the governance challenges is explained in terms of their politico‐cultural failings (e.g. the ‘ASEAN Way’ of non‐interference), the weak regulatory remit of agencies with a specific transboundary governance role (Mekong River Commission), the dominant developmental agenda of subregional cooperative arrangements (Greater Mekong Subregion) or the geopolitical dominance of China (Lancang–Mekong Cooperation). This article builds on these critiques by considering the relationship between the local commons impacted by transboundary projects and the framing of the commons at an inter‐governmental level. It shows that neglect of the local commons and the impacts on them of projects with transboundary effects is partly to be explained by the institutional scaling of the transboundary commons at a country‐to‐country level. It also argues for an expanded notion of transboundary, including investment and governance flows as well as the material environmental footprint of large‐scale investments.