Investigaciones Geograficas最新文献_第3页

Tendencia en el siglo XXI del Índice de Diferencias Normalizadas de Vegetación (NDVI) en la parte sur de la península de Baja California 下加利福尼亚半岛南部归一化植被差异指数(NDVI)的21世纪趋势

Investigaciones Geograficas Pub Date : 2017-12-01 Epub Date: 2018-02-20 DOI: 10.14350/rig.57214

Salinas-Zavala César Augusto , Raúl Octavio Martínez-Rincón , María Verónica Morales-Zárate

{"title":"Tendencia en el siglo XXI del Índice de Diferencias Normalizadas de Vegetación (NDVI) en la parte sur de la península de Baja California","authors":"Salinas-Zavala César Augusto , Raúl Octavio Martínez-Rincón , María Verónica Morales-Zárate","doi":"10.14350/rig.57214","DOIUrl":"10.14350/rig.57214","url":null,"abstract":"<div><p>The use of remote sensing in scientific research has revolutionized our understanding by revealing the diversity and complexity of terrestrial systems, something difficult to appreciate in the past. One of the tools most extensively used in this field is the Normalized Difference Vegetation Index (NDVI), which is a system for the remote monitoring of vegetation in a synoptic temporal and spatial scale. In this particular case, we are interested in analyzing not only the average spatial or temporal behavior of the NDVI, but any trends it may display. It is a simple but nonetheless important method for the study of temporal series, since it allows to identify, in a general sense, a positive (increase) or negative (decrease) pattern of the elements in a particular environment during a given period.</p><p>This paper analyzes the average behavior and sustained trend of NDVI per pixel for the southern portion of the Baja California Peninsula, Mexico, during the period 2001-2015. MODIS images obtained from the public database Land Processes Distributed Active Archive Center (LPDAAC,<span>https://lpdaac.usgs.gov/</span><svg><path></path></svg>) of the National Aeronautics and Space Administration (NASA) were used. The information is in binary format with a 250-m spatial resolution (pixel unit), and a 16-day temporal resolution (MOD13Q1). NDVI data corresponding to the southern portion of the Baja California Peninsula are available in two tiles (h07v06 and H08v06); therefore, techniques for processing tiled images were applied to produce each average 16-day image and, subsequently, work on a monthly basis. MODIS products were cut and reprojected from the Universal Transverse Mercator (UTM) system to the WGS84 geographic coordinate system; MODIS data to obtain the average value and the trend of NDVI per pixel were processed using the programming software R through different libraries. A total of 1 377 985 pixels were analyzed, 67.04% of which showed average NDVI values between 0.1 and 0.3, consistent with arid zones. However, values > 0.5 were recorded in areas with a high vegetation cover in high altitudes, with peak values (> 0.8) within Sierra La Laguna Biosphere Reserve (RBSL), located to the south of the peninsula. The trend analysis revealed that in this same area within RBSL, the NDVI trend values are negative, indicating loss of vegetation vigor. Negative trend values matched closely the areas with the highest population density and tourism development around RBSL, indicating that the southern region of the peninsula is facing a strong pressure that is leading to alterations in the system. Its magnitude should have to be evaluated to determine if it causes structural changes only or if functional changes are also involved. Although the tourism sector has boosted economic growth in the southern portion of the Baja California peninsula, this activity has also involved the greatest alterations to the natural system, which is particularly","PeriodicalId":39866,"journal":{"name":"Investigaciones Geograficas","volume":"2017 94","pages":"Pages 82-90"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14350/rig.57214","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121420112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Investigaciones Geograficas Pub Date : 2017-12-01 Epub Date: 2018-02-20 DOI: 10.14350/rig.59576

Edgar Talledos Sánchez

引用次数: 0

Accesibilidad espacial de los servicios de prevención y control del cáncer-cervicouterino en San Luis Potosí 圣路易斯宫颈癌预防和控制服务的空间可达性potosi

Investigaciones Geograficas Pub Date : 2017-12-01 Epub Date: 2018-02-20 DOI: 10.14350/rig.56936

Mónica Terán-Hernández

{"title":"Accesibilidad espacial de los servicios de prevención y control del cáncer-cervicouterino en San Luis Potosí","authors":"Mónica Terán-Hernández","doi":"10.14350/rig.56936","DOIUrl":"https://doi.org/10.14350/rig.56936","url":null,"abstract":"<div><h3>Background</h3><p>Accessibility to health care is a key objective, internationally speaking, to the satisfaction of population health needs. Equity and quality in access to health services (WHO, 2014). Borgonovi and Compagni (2013:34) argue that “medical care should be accessible and equitable for the entire population, based on sustainable attention economically, socially and politically speaking”. Recent studies that incorporate the spatial analysis show that the Cervical Cancer (CC) is a disease which evolution provides a very valuable period of time for its prevention, for that its well-timed care depends a lot on the accessibility to medical services and the spatial distribution of related socioeconomic factors (Mc Grail And Lorenzo-Luaces, 2009; Cheng <em>et al</em>., 2011; <span>Terán-Hernández <em>et al.,</em> 2016a</span>). The CC is the fourth most common cancer in women and the seventh overall in the world, affecting 528,000 individuals each year worldwide, with an age-standardised incidence rate (ASR) of 14.0 per 100,000 women. CC is reflected in different geographic distributions. It is a significant public health problem, especially in low and middle-income/Gross Domestic Product (GDP) countries. In Mexico, CC affects 13,960 women 15 years old or older (ASR 23.3, incidence rate per 100,000) annually. The incidence of CC is higher in states with high marginalisation, where women have little or no access to early detection and treatment. For example, in San Luis Potosí (SLP) state, which ranks 8th in CC mortality risk in the country (Lazcano <em>et al.,</em> 2008) and ASR of 52.80 per 100,000.</p></div><div><h3>Objective</h3><p>Design a method of spatial planning in the health sector that can be used on a daily basis in San Luis Potosí (SLP). To be exact, that it meets the needs, technical, and financial conditions of the government of the State and local governments. It is proposed that the method should be: simple (the technical capabilities of planners do not cover complicated mathematics); and feasible in financial terms (e.g. avoid working with databases that involve maintenance and upgrades to high cost).</p></div><div><h3>Methods</h3><p>It derives from the perspective of Geography of health, which between its lines of investigations, deals with the theme to estimate global and local accessibility of medical services. We used a method of spatial interaction as an indicator of the territorial dimension in the potential access to services at three scales of territorial disaggregation: by locality, municipality and by jurisdiction.</p></div><div><h3>Results</h3><p>The 73.29% of potential users to services that offer the medical units has a very unfavourable accessibility, mainly to the southeast of the state. The spatial distribution of the offer does not correspond to the spatial distribution of demand. The only medical attention unit certified as an oncological centre and where all dysplasia cases are referred to is the ","PeriodicalId":39866,"journal":{"name":"Investigaciones Geograficas","volume":"2017 94","pages":"Pages 122-137"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14350/rig.56936","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92120070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Primer Coloquio sobre la actividad pesquera en México: La Pesca Comercial de Ribera: oportunidades y conflictividades. Instituto de Geografía, UNAM Ciudad Universitaria, Cd. Mx., 21 y 22 de septiembre de 2017 关于墨西哥渔业活动的第一次讨论会:商业沿海渔业:机会和冲突。地理研究所，UNAM Ciudad Universitaria, Cd. Mx。， 2017年9月21日和22日

Investigaciones Geograficas Pub Date : 2017-12-01 Epub Date: 2018-02-20 DOI: 10.14350/rig.59585

Joaquín Daniel Nava Martínez

引用次数: 0

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.59523

Mariana Favila Vázquez

引用次数: 0

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.59524

Josefina Morales

引用次数: 1

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.59525

Virginie Thiébaut

引用次数: 0

Percepciones de la gestión del turismo en dos reservas de biosfera ecuatorianas: Galápagos y Sumaco 厄瓜多尔两个生物圈保护区:加拉帕戈斯群岛和苏马科的旅游管理观念

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.47805

Andrea Muñoz Barriga

{"title":"Percepciones de la gestión del turismo en dos reservas de biosfera ecuatorianas: Galápagos y Sumaco","authors":"Andrea Muñoz Barriga","doi":"10.14350/rig.47805","DOIUrl":"10.14350/rig.47805","url":null,"abstract":"<div><p>The tourism is considered as one of the key strategies to promote environmental conservation and socio-economic development oflocal communities in protected areas. UNESCO biosphere reserves are protected areas of extraordinary natural and cultural value, conceived as places for reconciliation between conservation and development. The primary objective of this research was to evaluate the key elements of the current management of tourism and its contribution to biodiversity conservation and development in two Ecuadorian biosphere reserves: Galapagos Islands and Sumaco (Amazon Basin). Moreover, the sustainability of tourism was evaluated. Data collection for the case studies was performed by the combination of quantitative and qualitative methods. Surveys were applied to residents in both reserves in order to find out about their socio-demographic characteristics, their main economic activities for supporting themselves and their attitude towards tourism, their level of knowledge about biosphere reserves, and their perception about advantages or disadvantages of living in a biosphere reserve. For qualitative analysis, in-depth semi-structured interviews with the main stakeholders in both biosphere reserves were applied. Experts in the management of protected areas, as well as representatives of different sectors directly and indirectly associated with tourism were interviewed. Although tourism is a concept that could be developed in accordance with the environment in these natural areas, in the case of Galapagos it is one of the main threats for the conservation of biodiversity in the archipelago due to the increasing number of tourists, among others. In contrast, in Sumaco tourism could be an important sustainable alternative to mining and oil extraction, which are the current threats to the conservation of the area.</p><p>There are serious problems in both reserves, mainly linked to the contamination of water resources. Such pollution imposes risks to the health to both, residents and tourists. The invasion of exotic species in Galapagos is one of the most serious threats to the conservation, while deforestation in combination with illegal logging and mining activities is the greatest danger in Sumaco.</p><p>Migration processes undoubtedly shape the attitudes and values of the current population in both reserves. In Galapagos most residents are immigrants, whereas in Sumaco a significant portion is Kichwa people who belong to the area's native population. In general, the inhabitants in both areas have not yet developed a true environmental awareness. Their awareness is based on usage, in the sense of “use it today and do not worry about it tomorrow”.</p><p>In both reserves, tourist services offered by local communities have low quality standards and are targeted on a market segment consisting of tourists with a low budget. Thus, the community revenues obtained from tourism are generally only a small percentage of the total tourism market.","PeriodicalId":39866,"journal":{"name":"Investigaciones Geograficas","volume":"2017 93","pages":"Pages 110-125"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14350/rig.47805","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128641915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Aportes teórico-metodológicos para un Sistema de Alerta Temprana de conflictos socioambientales. Experiencias en torno al Proyecto Mirador, Ecuador 社会环境冲突预警系统的理论和方法贡献。厄瓜多尔米拉多项目的经验

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.52264

Luis Sánchez Vázquez , María Beatriz Eguiguren Riofrío

{"title":"Aportes teórico-metodológicos para un Sistema de Alerta Temprana de conflictos socioambientales. Experiencias en torno al Proyecto Mirador, Ecuador","authors":"Luis Sánchez Vázquez , María Beatriz Eguiguren Riofrío","doi":"10.14350/rig.52264","DOIUrl":"https://doi.org/10.14350/rig.52264","url":null,"abstract":"<div><p>The article describes the theoretical and methodological design of an innovative Socio-environmental Conflicts Monitoring Model with an Early Warning System (<span>scmm</span>+<span>ews</span>) in El Pangui, Ecuador. The design of this model is a response to the growing socio-environmental tensions and disputes in the canton, influenced by the advent of large-scale mining. This mega-project, named “el Mirador”, is carried out by the Chinese consortium Ecua Corrientes S.A. (<span>ecsa</span>). It launches a transformation process that inevitably affects the use and exploitation of natural resources (land and water) and generates serious social and environmental conflicts, which have led to a strong resistance movement in the area. However, residents in favor of mining still expect the project to bring progress and economic development to the canton, through new sources of employment and investment by the national government. This generates a high rate of division and social conflict in relation to large-scale mining, which has resulted in several episodes of violence in recent years.</p><p>Under these conditions of tension and violence, a special concern arises from academia and civil society organizations to contribute to non-violent management of these conflicts. From the Observatorio de Conflictos Socioambientales of the Technical University of Loja, and with support from the German Technical Cooperation (<span>giz</span>), we decided to launch an intervention combining academic vision with fieldwork, in close collaboration with institutional actors and civil society at the local level.</p><p>The <span>scmm</span> + <span>ews</span> has been designed within the theoretical framework of the Peace and Conflicts Studies. Model implementation is a participatory process for systematic collection of quantitative and qualitative data, its multiparcial analysis and targeted dissemination. Its methodological proposal relies on the analysis of statistical data and perceptions of the local population, by monitoring a series of key social and environmental variables. The monitoring is carried out using two main methods: statistical data collection reports and official reports; and research of perception and satisfaction of the local population on the variables through surveys. In order to get a more reliable diagnosis of the perception of the population, qualitative research is carried out in parallel through in-depth interviews with key actors. With the information obtained, the need for issuance of an Early Warning report to the competent authorities (at local, provincial and state-level) can be defined.</p><p>In the period analyzed, the results showed a high degree of dissatisfaction with the mining company, which generated several conflicts. These results were obtained matching information from both qualitative (interviews with local inhabitants) and quantitative sources (perception indicators), and finally contributed to the issuance of the tw","PeriodicalId":39866,"journal":{"name":"Investigaciones Geograficas","volume":"2017 93","pages":"Pages 61-75"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14350/rig.52264","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136926498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Investigaciones Geograficas Pub Date : 2017-08-01 Epub Date: 2017-08-24 DOI: 10.14350/rig.59520

Luis Felipe Cabrales Barajas

引用次数: 0