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Registros recuperados: 61
Primeira ... 1234 ... Última
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A mixed-methods analysis of social-ecological feedbacks between urbanization and forest persistence Ecology and Society
BenDor, Todd; University of North Carolina at Chapel Hill; bendor@unc.edu; Shoemaker, Douglas A.; North Carolina State University; douglas.shoemaker@gmail.com; Thill, Jean-Claude; University of North Carolina at Charlotte; Jean-Claude.Thill@uncc.edu; Dorning, Monica A.; North Carolina State University; madorning@gmail.com; Meentemeyer, Ross K.; North Carolina State University; ross_meentemeyer@ncsu.edu.
We examined how social-ecological factors in the land-change decision-making process influenced neighboring decisions and trajectories of alternative landscape ecologies. We decomposed individual landowner decisions to conserve or develop forests in the rapidly growing Charlotte, North Carolina, U.S. region, exposing and quantifying the effects of forest quality, and social and cultural dynamics. We tested the hypothesis that the intrinsic value of forest resources, e.g., cultural attachment to land, influence woodland owners’ propensity to sell. Data were collected from a sample of urban, nonindustrial private forest (U-NIPF) owners using an individualized survey design that spatially matched land-owner responses to the ecological and timber...
Tipo: Peer-Reviewed Insight Palavras-chave: Forest persistence; Land-use change; Social-ecological feedbacks; Tax policy; Urban forests; Urbanization.
Ano: 2014
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A Peri-Urban Neotropical Forest Transition and its Consequences for Environmental Services Ecology and Society
Tipo: Peer-Reviewed Reports Palavras-chave: Exotic species invasion; Forest transition; GIS; Land-use change; Subtropical Argentina; Urbanization; Watershed conservation; Yungas.
Ano: 2008
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A Research to Village Combination and the Analysis of the Influences of Which Having on Social Economy During the Urbanization Process of Yantai City AgEcon
Yu, Huilu; Xia, Yanling; Lu, Qingshui.
With the rapid development of urbanization of our country, serious conflicts on land using appear. Village combination in rural areas is an important way to increase cultivated land, promote the development of urbanization and effectively solve conflicts on land using, which plays an significant role in solving agriculture problems, countryside problems and peasant problems, assuring foods safety and constructing social new countryside.Taking Yantai City as example, the paper firstly makes analyses on the necessaries and the feasibility of village combination. And then based on the mode GM (1,1) of grey theory, the paper forecasts the urbanization ratio, the proportion of urban and rural areas to the whole population and finally programs the rational scale...
Tipo: Journal Article Palavras-chave: Village combination; Urbanization; Reclaimation; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/118309
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A World for Reactive Phenotypes ArchiMer
Geoffroy, Benjamain; Alfonso, Sebastien; Sadoul, Bastien; Blumstein, Daniel T.
Humans currently occupy all continents and by doing so, modify the environment and create novel threats to many species; a phenomenon known as human-induced rapid environmental changes (HIREC). These growing anthropogenic disturbances represent major and relatively new environmental challenges for many animals, and invariably alter selection on traits adapted to previous environments. Those species that survive often have moved from their original habitat or modified their phenotype through plasticity or genetic evolution. Based on the most recent advances in this research area, we predict that wild individuals with highly plastic capacities, relatively high basal stress level, and that are generally shy—in other words, individuals displaying a reactive...
Tipo: Text Palavras-chave: Coping style; Antipredator behavior; Evolution; Stress physiology; Ecology; Predation; Urbanization; Pollution.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00664/77564/79528.pdf
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Analysis of the Price of Development Right of Agricultural Land in China AgEcon
Sun, Nan; Chen, Shuhui.
According to the viewpoints of predecessors, we define the signification of development right of agricultural land and connotation of the price of development right of agricultural land as follows, the development right of agricultural land is to change the former use nature of agricultural land, so as to become the right of construction Use land; the price of development right of agricultural land refers to the price that is difference between the price of construction use land, and summation of the price of former agricultural land. the expense of developing agricultural land, the expense of management, and profit, after the agricultural land is transformed into non-agricultural construction use land. By using the principle of economics of land, this...
Tipo: Journal Article Palavras-chave: Urbanization; Development right of agricultural land; The price of development right of agricultural land; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/118287
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Biodiversity, Urban Areas, and Agriculture: Locating Priority Ecoregions for Conservation Ecology and Society
Ricketts, Taylor; World Wildlife Fund; taylor.ricketts@wwfus.org; Imhoff, Marc; NASA's Goddard Space Flight Center; mimhoff@LTPmail.gsfc.nasa.gov.
Urbanization and agriculture are two of the most important threats to biodiversity worldwide. The intensities of these land-use phenomena, however, as well as levels of biodiversity itself, differ widely among regions. Thus, there is a need to develop a quick but rigorous method of identifying where high levels of human threats and biodiversity coincide. These areas are clear priorities for biodiversity conservation. In this study, we combine distribution data for eight major plant and animal taxa (comprising over 20,000 species) with remotely sensed measures of urban and agricultural land use to assess conservation priorities among 76 terrestrial ecoregions in North America. We combine the species data into overall indices of richness and endemism. We...
Tipo: Peer-Reviewed Reports Palavras-chave: North America; Agriculture; Biodiversity; Conservation; Conservation priorities; Ecoregions; Endemism; Human land use; Species richness; Threats to biodiversity; Urbanization.
Ano: 2003
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Can insect assemblages tell us something about the urban environment health? Anais da ABC (AABC)
VALENTE-GAIESKY,VERA LÚCIA DA SILVA.
Abstract Abstract: If we consider Drosophilidae, the answer to the question above is yes. Many research groups in Brazil and abroad have been showing that assemblages of flies of this family can reflect environmental alteration levels caused by urbanization, and/or by other human disturbances. I will present here a summary of our findings in Drosophilidae assemblages reflecting different degrees of environmental perturbation. These studies were done by graduate students of two post graduate programs of UFRGS, under my supervision, along several decades. I will also present the results stemming from the effort of other Brazilian Drosophilid study groups while identifying the members of those assemblages in different Biomes. As a result of those field...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bioindication; Brazilian Biomes; Drosophilidae; Urbanization.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000600606
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CDM Potential for Rural Transition in China Case Study: Options in Yinzhou District, Zhejiang Province AgEcon
Zhao, Xingshu; Michaelowa, Axel.
This paper aims to examine the potential of the Clean Development Mechanism (CDM) to address energy- related issues during the rural transition process in China, using a case study of quickly urbanizing and industrializing Yinzhou district in coastal Zhejiang province. Yinzhou's per capita GDP reached US$ 3100 in 2002, three times China's average, and is targeted to achieve $10,000 in 2020. We assess the current energy status of Yinzhou, and provide projections of energy consumption and CO2 emissions up to the year 2020. Energy resource shortages and limited possibilities to obtain coal-fired electricity from national grid illustrate the opening gap between energy supply and demand. We find that Yinzhou's CDM potential is concentrated in efficiency...
Tipo: Working or Discussion Paper Palavras-chave: Clean Development Mechanism; China; Urbanization; Energy efficiency; Environmental Economics and Policy; Q 540; Q 580.
Ano: 2004 URL: http://purl.umn.edu/26152
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Child Development: Vulnerability and Resilience AgEcon
Engle, Patrice L.; Castle, Sarah; Menon, Purnima.
Many of the challenges facing children now are a function of the changing times, including increases in urbanization, political violence, changing family forms, and, in some areas, decreased supplies of adequate food. This paper reviews the evolving nature of these risks. In addition, the paper analyzes the development of formal and informal strategies to ameliorate the vulnerability and promote the resilience of young children to these risks. The paper identifies four stages in the research process regarding risks for children: (1) identification of the risk; (2) clarification of etiology and consequences; (3) recognition of resilience among some individuals; and (4) definition of factors in resilience and implications for intervention.
Tipo: Working or Discussion Paper Palavras-chave: Food Supply; Urbanization; Child Development; Health Services; Welfare Economics; Labor and Human Capital.
Ano: 1996 URL: http://purl.umn.edu/97309
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Cointegration Analysis on the Relation between Urbanization and Economic Growth in China AgEcon
Liu, Ai-ying; Yao, Li-fen; Li, Qing-chen.
This paper utilizes cointegration theory, error correcting model and Granger causality testing theory to make an empirical research on the relation between urbanization and GDP in China, and also implements a comparative analysis to the relation between three industries and degree of urbanization, the related coeffecient is 0.97, 0.95, 0.97, 0.97. And the result shows a long-term balance between these two factors, and the promoting effect to tertiary industry by urbanization is more obvious. Urbanization and economic growth are the long-term balanced relations. In the long-term balance, every 1% increment of urbanization can make 4.82% increment of GDP; In short-term balance, if the balance depart from the long-term balance at the i-th term, the model will...
Tipo: Journal Article Palavras-chave: Economic growth; Urbanization; Cointegration test; Error correction model; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113441
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Communities of soil macrofauna in green spaces of an urbanizing city at east China RChHN
BAO-MING,GE; ZHEN-XING,LI; DAI-ZHEN,ZHANG; HUA-BIN,ZHANG; ZONG-TANG,LIU; CHUN-LIN,ZHOU; BO-PING,TANG.
We evaluated the diversity of soil macrofauna communities inhabiting urban green spaces in Yancheng City, an urbanizing city located east of China. In the end of April 2011, the taxonomic richness, abundance and composition of soil macrofauna communities were assessed and compared among five types of green space (poplar forest, rapeseed farm, grassland in park, lawn and nursery garden) and three depth layers in the soil, with taxonomic resolution attained at the order level. Taxonomic richness (orders) and abundance were significantly different among green spaces. Diversity indices (Margalef's taxonomic richness R and Shannon-Weaver diversity index H') were higher in poplar forest, grassland in park and nursery garden than in rapeseed farm and lawn....
Tipo: Journal article Palavras-chave: China; Diversity; Soil layer; Urbanization; Yancheng City.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000200008
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Comparative metagenome of a stream impacted by the urbanization phenomenon BJM
Medeiros,Julliane Dutra; Cantão,Maurício Egídio; Cesar,Dionéia Evangelista; Nicolás,Marisa Fabiana; Diniz,Cláudio Galuppo; Silva,Vânia Lúcia; Vasconcelos,Ana Tereza Ribeiro de; Coelho,Cíntia Marques.
Abstract Rivers and streams are important reservoirs of freshwater for human consumption. These ecosystems are threatened by increasing urbanization, because raw sewage discharged into them alters their nutrient content and may affect the composition of their microbial community. In the present study, we investigate the taxonomic and functional profile of the microbial community in an urban lotic environment. Samples of running water were collected at two points in the São Pedro stream: an upstream preserved and non-urbanized area, and a polluted urbanized area with discharged sewage. The metagenomic DNA was sequenced by pyrosequencing. Differences were observed in the community composition at the two sites. The non-urbanized area was overrepresented by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquatic environment; Urbanization; Microbial community; Metagenomic.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000400835
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Construction of Governmental Function Network Based on the Perspective of Problem of Farmers Who Lose Their Land AgEcon
Li, Cui-ping; Wang, Yu-hua.
This paper illustrates three developmental stages of the functional transformation of western governments characterized by different extent of state involvement in economic activities. It investigates the functional role of nation-state in urbanization process in the context of western advanced economies with a particular focus on the laws and regulations, delineating the subjects, objectives, operational procedure, approval system, compensation standard and so on in relation to land expropriation. It also discusses the direction of the adjustment of state functions in China along three lines, including the transformation from political government to economic government, from direct management to indirect management and from comprehensive government to...
Tipo: Journal Article Palavras-chave: Landless farmers; Urbanization; Governmental functions; Network; China; Agribusiness.
Ano: 2011 URL: http://purl.umn.edu/113421
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Croissance urbaine et inondations à Lomé : Réflexion sur les facteurs responsables et les perspectives d'avenir. OceanDocs
Klassou, K.S..
Cette étude, qui évoque l'idée d'un lien entre la croissance urbaine de Lomé et celle de redoutables inondations, veut mettre l'accent sur les facteurs responsables de la submersion saisonnière de la ville. Le travail visé particulièrement à préciser l'impact conjugué de l'hétérogénéité morphologique du site, de la concentration excessive des pluies, mais aussi des responsabilités humaines dans la survenance des inondations.
Tipo: Proceedings Paper Palavras-chave: Floods; Urbanization; Http://aims.fao.org/aos/agrovoc/c_8088.
Ano: 1998 URL: http://hdl.handle.net/1834/1230
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Determinants of Public Health expenditures in Pakistan AgEcon
Abbas, Faisal; Hiemenz, Ulrich.
This study describes the macroeconomic determinants of health care spending in a broad context using time series data from Pakistan on economic, demographic, social, and political variables. The data spans a period from 1972- 2006 and was analyzed using cointegration and error correction approaches. All variables were found to be first difference stationary and the results confirm the presence of one cointegrating vector. This proves the existence of a long-run relationship between public health care expenditures and the other variables used in the model. The income elasticity of public health care expenditures is estimated at 0.23. As this value is less than unity it suggests that, contrary to most of the Organization for Economic Co-operation and...
Tipo: Working Paper Palavras-chave: Public Health Expenditures; Unemployment; Urbanization; Cointegration; Time series; Pakistan; Health Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/118422
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Developing a Research and Action Agenda for Examining Urbanization and Caregiving: Examples from Southern and Eastern Africa AgEcon
Engle, Patrice L.; Menon, Purnima; Garrett, James L.; Slack, Alison.
The UNICEF-expanded model for nutrition is used to analyze the circumstances of care in urban environments. The model postulates that there are six major types of care behaviors: feeding and breast-feeding, food preparation and handling, hygiene behavior, psychosocial care, care for women, and home health practices. These behaviors require the resources of education and knowledge of the caregivers, the physical and mental health of caregivers, autonomy in decisionmaking, time availability, and the social support of the family and community in order to ensure adequate care for the child. This paper describes each of these constraints, and two of the behaviors (feeding and health care utilization) in urban and rural areas. Data from Demographic and Health...
Tipo: Working or Discussion Paper Palavras-chave: Child Feeding; Food handling; Urban health; Urbanization; Education; Research; Gender; Health and Nutrition; Education; Childcare and work; Livelihoods; Urban programming; Food Security and Poverty.
Ano: 1997 URL: http://purl.umn.edu/97296
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Development of a Compendium of Local, Wild-Harvested Species Used in the Informal Economy Trade, Cape Town, South Africa Ecology and Society
Petersen, L. M.; University of Queensland, Australia; Sustainable Livelihoods Foundation, South Africa; Leif.petersen@livelihoods.org.za; Moll, E. J.; Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa;; Collins, R.; School of Agriculture and Food Sciences, University of Queensland, Australia;; Hockings, Marc T.; Department of Geography, Planning and Environmental Management, University of Queensland, Australia; m.hockings@uq.edu.au.
Wild harvesting has taken place over millennia in Africa. However urbanization and cash economies have effectively altered harvesting from being cultural, traditional, and subsistence activities that are part of a rural norm, to being a subculture of commonly illicit activities located primarily within the urban, cash-based, informal economy. This paper focuses on Cape Town, South Africa where high levels of poverty and extensive population growth have led to a rapidly growing informal industry based on the cultural, subsistence, and entrepreneurial harvesting and consumption of products obtained from the local natural environment. Through a process of literature reviews, database analysis, and key informant interviews, a compendium of harvested species...
Tipo: Peer-Reviewed Reports Palavras-chave: Biodiversity; Cape Town South Africa; Cash-based economy; Compendium; Conservation; Illicit harvesting; Informal economy; Urbanization; Wild harvesting; Wild harvest trade.
Ano: 2012
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Diet and trophic guilds of fish assemblages in two streams with different anthropic impacts in the northwest of Paraná, Brazil Rev. Bras. Zool.
Bonato,Karine Orlandi; Delariva,Rosilene Luciana; Silva,Jislaine Cristina da.
In the present study, we describe the diets of the fish assemblages in two streams in the Maringá region of Paraná that are under the influence of different anthropic impacts. We also evaluate how the origin and use of food resources varies temporally and spatially and how the trophic organization of the fish assemblages differs between the two streams. Fish were collected every two months from October 2006 to October 2007 using sieves, seining and closing nets along two 50 m stretches of each stream. We used the volumetric method to analyze the stomach contents of 599 fish belonging to 15 species. We then employed ANOSIM, SIMPER, NMDS and cluster analyses (using the Bray-Curtis index) to examine how different factors (species, stream, sampling site and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Food resources; Seasonality; Spatial variation; Urbanization.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000100004
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Does urbanization have positive or negative effects on Crab spider (Araneae: Thomisidae) diversity? Rev. Bras. Zool.
Argañaraz,Carina I.; Gleiser,Raquel M..
ABSTRACT Urbanization has a great impact on the diversity of living organisms. Spiders, for example, have been shown to respond negatively (some orb weaving species) and positively (ground dwelling species) to urbanization. The effects of urbanization on crab spiders (Thomisidae) (sit-and-wait predators that generally ambush their prey on flowers and leaves) are not sufficiently known. This paper describes the Thomisidae community that inhabits green patches in a temperate Neotropical city, Cordoba, Argentina, and its surroundings, and ascertains whether there are differences in species richness, abundance and composition between urban and exurban sites. Samples were collected from 30 sites during the summer and spring of 2013 and 2014, using the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arachnid; Biodiversity; City; Richness; Turn-over; Urbanization.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100319
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Dynamique urbaine et croisement culturel sur les côtes Ouest-Africaines au debut du xxè siecle : Lome fut-elle une exception ? OceanDocs
Coquery-Vidrovitch, C..
La plupart des interventions présentées dans ce colloque insistent sur l'originalité de la ville de Lomé. Or, est-il sûr que la ville soit à ce point une exception ? Et si oui,comment l'expliquer ? Cette communication se propose d'examiner cette question sur plusiers plans, notamment à propose de l'origine de la ville, de sa dynamique urbaine (à la fois démographique et politique), et du niétissage culturel de la population loméenne.
Tipo: Proceedings Paper Palavras-chave: Urbanization; Http://aims.fao.org/aos/agrovoc/c_8088.
Ano: 1998 URL: http://hdl.handle.net/1834/1229
Registros recuperados: 61
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