Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China)

26 samples were processed for a taxonomic study of ostracods from the Upper Permian (Changhsingian) - Lower Triassic (Griesbachian) interval of the Dajiang section, Guizhou Province, South China. 112 species belonging to 27 genera are recognized. Five new species are described: Acratia candyae sp. nov, Bairdia adelineae sp. nov., Bairdia? huberti sp. nov., Bairdia jeromei sp. nov., Orthobairdia jeanlouisi sp. nov. The unexpected survival faunas associated with microbial formations in the aftermath of the end-Permian extinction are documented for the first time. Ostracod biodiversity variations and palaeo-environmental modifications associated with microbial growth through the Permian-Triassic boundary (PTB) are discussed

Using local ecological knowledge to assess the status of the Critically Endangered Chinese giant salamander Andrias davidianus in Guizhou Province, China

The Critically Endangered Chinese giant salamander Andrias davidianus, the world's largest amphibian, is severely threatened by unsustainable exploitation of wild individuals. However, field data with which to assess the salamander's status, population trends, or exploitation across its geographical range are limited, and recent field surveys using standard ecological field techniques have typically failed to detect wild individuals. We conducted community-based fieldwork in three national nature reserves (Fanjingshan, Leigongshan and Mayanghe) in Guizhou Province, China, to assess whether local ecological knowledge constitutes a useful tool for salamander conservation. We collected a sample of dated salamander sighting records and associated data from these reserves for comparative assessment of the relative status of salamander populations across the region. Although Fanjingshan and Leigongshan are still priority sites for salamander conservation, few recent sightings were recorded in either reserve, and respondents considered that salamanders had declined locally at both reserves. The species may already be functionally extinct at Mayanghe. Although respondent data on threats to salamanders in Guizhou are more difficult to interpret, overharvesting was the most commonly suggested explanation for salamander declines, and it is likely that the growing salamander farming industry is the primary driver of salamander extraction from Guizhou's reserves. Questionnaire-based surveys can collect novel quantitative data that provide unique insights into the local status of salamander populations, and we advocate wide-scale incorporation of this research approach into future salamander field programmes

The 2010 spring drought reduced primary productivity in southwestern China

Many parts of the world experience frequent and severe droughts. Summer drought can significantly reduce primary productivity and carbon sequestration capacity. The impacts of spring droughts, however, have received much less attention. A severe and sustained spring drought occurred in southwestern China in 2010. Here we examine the influence of this spring drought on the primary productivity of terrestrial ecosystems using data on climate, vegetation greenness and productivity. We first assess the spatial extent, duration and severity of the drought using precipitation data and the Palmer drought severity index. We then examine the impacts of the drought on terrestrial ecosystems using satellite data for the period 2000–2010. Our results show that the spring drought substantially reduced the enhanced vegetation index (EVI) and gross primary productivity (GPP) during spring 2010 (March–May). Both EVI and GPP also substantially declined in the summer and did not fully recover from the drought stress until August. The drought reduced regional annual GPP and net primary productivity (NPP) in 2010 by 65 and 46 Tg C yr−1, respectively. Both annual GPP and NPP in 2010 were the lowest over the period 2000–2010. The negative effects of the drought on annual primary productivity were partly offset by the remarkably high productivity in August and September caused by the exceptionally wet conditions in late summer and early fall and the farming practices adopted to mitigate drought effects. Our results show that, like summer droughts, spring droughts can also have significant impacts on vegetation productivity and terrestrial carbon cycling

PRODUCTIVITY GROWTH, TECHNOLOGY PROGRESS, AND EFFICIENCY CHANGE IN CHINESE AGRICULTURAL PRODUCTION FROM 1984 TO 1993

This study applies a Data Envelopment Analysis (DEA) approach to analyze total factor productivity, technology, and efficiency changes in Chinese agricultural production from 1984 to 1993. Twenty- nine provinces in China were classified into advanced-technology and low-technology categories. The Malmquist productivity measures were decomposed into two components: technical change index and efficiency change index. The results showed that total factor productivity has risen in most provinces for both technology categories. Technical progress has been the most important factor to Chinese agricultural productivity growth since 1984 and will remain crucial to productivity growth in low-technology provinces. Low efficiency in many important agricultural provinces indicates a great potential for China to increase productivity through improving technical efficiency. Continuously expanding market economy and enhancing rural education may also help farmers to improve technical efficiency and productivity in agricultural production.Chinese agriculture, Total Factor Productivity (TFP), technology, technical efficiency, Data Envelopment Analysis (DEA)., Productivity Analysis, Research and Development/Tech Change/Emerging Technologies,

In-situ cosmogenic ³⁶Cl denudation rates of carbonates in Guizhou karst area

This study quantifies surface denudation of carbonate rocks by the first application of in-situ cosmogenic <sup>36</sup>Cl in China. Concentrations of natural Cl and in-situ cosmogenic <sup>36</sup>Cl in bare carbonates from Guizhou karst areas were measured with isotope dilution by accelerator mass spectrometer. The Cl concentration varied from 16 to 206 ppm. The <sup>36</sup>Cl concentrations were in range of (0.8–2.4)×106 atom g−1, resulting in total denudation rates of 20–50 mm ka−1 that averaged over a 104–105 a timescale. The <sup>36</sup>Cl-denudation rates showed roughly a negative correlation with the local mean temperature. This preliminary observation may suggest the variations of proportions of chemical weathering and physical erosion in denudation process, depending upon local climatic conditions

Political and ethnic representation in Chinese local governance : analysis of the roles of the deputies of Leishan County People's Congress, Guizhou Province, China : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Development Studies, Massey University, Manawatu, New Zealand

This thesis investigates the political and ethnic environment of local Chinese political actors and their representational dilemmas in the Miao-dominant area of Leishan County, Guizhou Province, China. The investigation is conducted via two research questions: how do the deputies of a Miao County People‘s Congress in China play their roles in representing the interests of the state towards the community, and how do they represent the interests of the community towards the state? The achievements of the deputies and the challenges they face in their dual representational roles are a focus of the analysis. The thesis provides insight into the governance and politics of a local government body dominated by an ethnic minority and the interplay of these dynamics with central government authorities presided over by Han Chinese. The representative structure of the Leishan County People‘s Congress (LCPC) and its deputy membership is explored to understand how the deputies enact their roles in promoting, intervening in and restructuring development projects as both agents of and remonstrators to the central state. Case studies of village governance and cultural tourism are used to illustrate how the LCPC deputies are both coordinators and negotiators in a polycentric local governance structure. The fieldwork was carried out in the ethnic area of Leishan County. Relevant data was collected through four interrelated research methods: focus groups, semi-structured individual interviews, purposive observation and document analysis. The quantification of pairwise ranking by the focus groups highlighted the achievements and challenges in the key functions required of the deputies. The data also led to two further areas for in-depth analysis: centrallocal relations, and the political and ethnic representation of the deputies. The research found that when conflicts exist, political representation that favours the state prevails over community interests. At the same time, the deputies‘ representation of their ethnic communities is enhanced and augmented when they undertake to localise the national development policies and projects handed down by central authorities. Finally, the concept of polycentric governance enables a more precise understanding of the changing local governance systems in China among the diverse stakeholders present in the ethnic communities

The impact of property rights on households'investment, risk coping, and policy preferences : evidence from China

Even though it is widely recognized that giving farmers more secure land rights may increase agricultural investment, scholars contend that, in the case of China, such a policy might undermine the function of land as a social safety net and, as a consequence, not be sustainable or command broad support. Data from three provinces, one of which had adopted a policy to increase security of tenure in advance of the others, suggest that greater tenure security, especially if combined with transferability of land, had a positive impact on agricultural investment and, within the time frame considered, led neither to an increase in inequality of land distribution nor a reduction in households'ability to cope with exogenous shocks. Household support for more secure property rights is increased by their access to other insurance mechanisms, suggesting some role of land as a safety net. At the same time, past exposure to this type of land right has a much larger impact quantitatively, suggesting that a large part of the resistance to changed property rights arrangements disappears as household familiarity with such rights increases.Real Estate Development,Environmental Economics&Policies,Land and Real Estate Development,Municipal Housing and Land,Banks&Banking Reform,Environmental Economics&Policies,Municipal Housing and Land,Land and Real Estate Development,Real Estate Development,Banks&Banking Reform

Market Integration and Economic Development: A Long-run Comparison

How much of China's recent economic performance can be attributed to market-oriented reforms introduced in the last two decades? A long-run perspective may be important for understanding the process of economic development occurring today. This paper compares the integration of rice markets in China today and 270 years ago. In the 18th century, transport technology was non-mechanized, but markets were close to being free markets. We distinguish local harvest and weather from aggregate sources of price variation in a historical sample and in a similarly constructed contemporary sample. Findings indicate the degree of market integration in the 1720s is a very good predictor of per capita income in the 1990s. Moreover, the current pattern of interregional income in China is strongly linked to persistent geographic factors that were already apparent several centuries ago, well before the enactment of modern reform programs.

A New General Allometric Biomass Model

To implement monitoring and assessment of national forest biomass, it is becoming the trend to develop generalized single-tree biomass models suitable for large scale forest biomass estimation. Considering that the theoretical biomass allometric model developed by West et al. [1,2] was statistically different from the empirical one, the two parameters in the most commonly used biomass equation M=aDb were analyzed in this paper. Firstly, based on the knowledge of geometry, the theoretical value of parameter b was deduced, i.e., b=7/3(~2.33), and the comparison with many empirical studies conducted throughout the globe indicated that the theoretical parameter could describe soundly the average allometric relationship between aboveground biomass M and D (diameter on breast height). Secondly, using five datasets of aboveground biomass which consisted of 1441 M-D pairs of sample trees, the new general biomass allometric model was validated. Finally, the relationship between parameter a and wood density p was analyzed, and the linear regression was developed. The new model, which is not only simple but also species-specific, offers a feasible approach on establishment of generalized biomass models for regional and national forest biomass estimation