Influence of habitat type and distance from source area on bird taxonomic and functional diversity in a Neotropical megacity

The Neotropical region has been subjected to massive urbanization, which poses high risks for some global biodiversity hotspots and losses of ecosystem functions and services. In this study, we investigate how distance from large patches of native forests (source areas) and vegetation (green)/and infrastructure (gray) characteristics affect bird species richness and functional diversity in São Paulo megacity, southeastern Brazil. We analyzed the effects of source areas and green/gray characteristics on species richness and functional diversity (richness, evenness, and divergence) indices. We detected 231 bird species, and our data confirmed our predictions: (1) bird species richness in urbanized habitats was found to be (~?50–85%) lower than in source habitats; (2) species richness and trait composition significantly decreased as the distance from the source area increased, while functional richness was not affected by this metric; and (3) shrub and herbaceous covers and maximum height of trees were positively correlated with species richness and unique functional traits regarding habitat, diet, foraging and nesting strata and dispersal ability of birds in the forest-urban matrix. The number of buildings was negatively correlated with bird species richness and functional richness. Maximum height of buildings caused dramatic declines in functional evenness. Functional divergence was notably lower in sites with high shrub cover. Our study stresses the complexity of vegetation embedded in large Neotropical urban settlements and the need to maintain large protected areas surrounding megacities to mitigate the impacts of urbanization on birds.

     

The Influence of Value Orientations,Personal Beliefs,and Knowledge about Resource Extraction on Local Leaders' Positions on Shale Development

Unconventional shale oil and gas production plays a prominent role in boosting economic growth and stimulating wealth creation in many communities. However, because of potential social and environmental drawbacks, including a lack of affordable housing and groundwater contamination from drilling, unconventional shale development is highly contentious in many areas and has resulted in many community conflicts. Hydraulic fracturing, which is a specific technology utilized in unconventional shale development, has proved especially contentious because of concerns about its long‐term environmental consequences. Given the fast pace of shale development, coupled with the controversy that surrounds it, we seek to understand what factors affect a local government official's stance on shale development and hydraulic fracturing. To do this we draw from value‐belief‐norms theory while additionally examining knowledge and community‐level factors that can influence an official's position. In this study, we survey 308 local government officials across six shale plays in the United States to examine local officials' positions on shale development and hydraulic fracturing. We find that the more positively officials perceive the consequences of shale development, the less likely they are to support banning hydraulic fracturing. Additionally, we find that networks to other shale communities are positively associated with favoring a ban. Further, leaders with a bachelor's degree or higher are more likely to favor a ban than those with lower than a bachelor's degree.     

Dynamics of ruderal species diversity under the rapid urbanization over the past half century in Harbin,Northeast China

Urbanization has resulted in obvious changes in plant species diversity. We analyzed the dynamics of ruderal species diversity in Harbin over the past half century using historical data collected in 1955 and data of the present spatial distribution in 2010–2011. The results show that, the number of ruderal species decreased from 611 to 175 with remarkable tendency of decreasing in perennial species and increasing in winter annual species in the past half century, which caused the shift of life form spectrum from perennial mono-dominant type to summer annual and perennial co-dominant type. Meanwhile, the proportion of tropical originated species increased and the proportion of temperate originated species decreased which were considered to relate with the increase of temperature in urban area during the past half century. Moreover, there was a distinct decrease of the proportion of aquatic and hygrophytic ruderal species while an increase of mesic and xeric ruderal species which suggested a drought trend in urban habitats that consistent with the change of land use characterized as decrease of natural water bodies and wetlands and increase of urban land. Comparison of ruderal species along urbanization gradient also got the similar results with the above results from analysis on temporal scales and confirmed the effect of urbanization on decreasing plant richness. Our results suggested that land use change combined with its effect on temperature and disturbance regimes in urban habitats preferred species with short life span, high drought tolerance, fast growth rates and high seed yields.     

The intellectual and scientific basis of science,technology and innovation research

There has been a considerable increase in the literature devoted to innovation in the past few decades. This research area is characterized by prolific interdisciplinary connections and no single domain is able to embrace all aspects of science, technology and innovation. By analyzing nearly 60,000 references included in the 1442 articles published between 1974 and 2007 in the area's seed journal, Research Policy (RP), we have uncovered the following patterns: (1) the most important sources of knowledge are associated with “core” economics (mostly mainstream) and management sources, even though the importance of innovation-related sources has been rising; (2) the degree of autonomy of science, technology and innovation research is still weak, revealing its incipience and lack of a unified theoretical framework; (3) the most influential authors and studies follow heterodox approaches, namely the evolutionary approach (e.g. Richard R. Nelson) and the European approach to innovation (e.g. Keith Pavitt and Chris Freeman), although it is rather surprising that one of the most widely recognized founding fathers of innovation-related studies, Joseph Schumpeter, is absent from the top-10 cited authors list; and (4) the ranking of the most influential studies highlights the relevance of the evolutionary paradigm, with its focus on the capabilities and routines of firms, and the policy-driven nature of topics, evidencing the pervasiveness of the literature on the National System of Innovation.     

近代中国“乡村改造”的两条路向

20世纪3、40年代,梁漱溟和费孝通相继对中国农村问题进行理论研究并付诸实践。梁漱溟从文化改造着手,试图通过建立新礼俗、乡学和村学来教育民众,以最终复兴中国传统文化;费孝通则从经济建设出发,通过发展分散的乡土工业来提高农民的生活水准,以满足农民的切身利益。两者的视角一个是“由外而内”,一个是“自内而外”,对中国农村问题的认识既有相似又有明显差异,代表了近代中国“乡村改造”的两条路向。     

The Atlantic Slave Trade to Maranhão, 1680–1846: Volume,Routes and Organisation

Maranhão has the best documented slave trade in all Portuguese America. However, it is one of the least studied branches of the Atlantic slave trade. This article provides an assessment of the volume, routes and organisation of the slave trade to Maranhão, in northern Brazil. It shows that, although small in scale, the slave trade to Maranhão displayed important features concerning the routes and organisation of the Atlantic slave trade. Finally, because of the late European occupation and relative isolation, the slave trade to Maranhão offers ideal conditions for observing the rise and fall of African slavery in the New World.     

Building political competencies for the transformation of racism in Aotearoa

Abstract

In the face of enduring systemic racial disparities between Māori and non-Māori, we invite Pākehā health, education and social service professionals to review their ethical conduct and to enhance their political competencies to help transform racism. This paper examines how Pākehā became beneficiaries of racism and how libertarian discourses are used to distract attention away from the associated privileges. Based on experience in the anti-racism movement, we (the Pākehā authors) advocate for the grounding of Pākehā practitioners in a deeper understanding of colonial history. We invite closer attention to structural analysis as a means of gaining the understanding needed to strengthen political competence in order to avoid collusion with institutional racism. We make a case to develop co-intentional relationships with Māori through active whanaungatanga and the applications of the teachings of Freire as pathways for strengthened practice.     

朝阳博物馆 穿越千年的视觉之魅

几年前,好莱坞电影《博物馆惊魂夜》上映后,我看了好几遍。我感慨纽约有如此美轮美奂的博物馆,也感慨美国导演的心机,拿电影赚了票房不说,还顺带着向全球青少年输出了一把美国历史文化。正如我们在电影里看到了,一座博物馆可以浓缩一个国家、一座城市的历史文化。这几年,中国各地大兴建设博物馆之风,一时间让人眼花缭