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Showing items 1 through 9 of 13.
  1. Library Resource
    Journal Articles & Books
    December, 2015
    Guatemala

    Cloud forest in the Central Highlands of Guatemala provides important ecosystem services for the Q’eqchi’ Maya but has been disappearing at an increasing rate in recent decades. This research documents changes in cloud forest cover, explores some contributing factors to deforestation, and considers forest preservation and food security implications for Q’eqchi’ communities. We used a transdisciplinary framework that synthesized remote sensing/GIS analysis of land cover change, focus group dialogs, and surveys.

  2. Library Resource
    Journal Articles & Books
    December, 2012
    Guatemala

    The existing legal framework for water resources management in Guatemala is obsolete, inconsistent and not enforced. To bridge the gap, many indigenous and non-indigenous communities throughout the country successfully regulate water use through oral or written bylaws. This paper classifies the rules and practices adopted by local communities in order to define their scope and anticipate options to recognize customary water rights in future statutory legislation, as well as under the current legal regime, consistently with the public interest.

  3. Library Resource
    Journal Articles & Books
    December, 2012
    Mexico

    This research examines the spatio-temporal trends in Advanced Very High Resolution Radiometer (AVHRR) Global Inventory Modelling and Mapping Studies (GIMMS) normalized difference vegetation index (NDVI) time series to ascribe land use change and precipitation to observed changes in land cover from 1982 to 2007 in the Mexican Yucatán Peninsula, using seasonal trend analysis (STA).

  4. Library Resource
    Journal Articles & Books
    December, 2012
    Costa Rica

    A modelling experiment is used to examine different land-use scenarios ranging from extreme deforestation (31% forest cover) to pristine (95% forest cover) conditions and related Payment for Ecosystem Services (PES) schemes to assess whether a change in streamflow dynamics, discharge extremes and mean annual water balance of a 73.4-km² tropical headwater catchment in Costa Rica could be detected.

  5. Library Resource
    Journal Articles & Books
    December, 2013
    Mexico

    Mapping and monitoring wetland ecosystems over large geographic areas based on remote sensing is challenging because of the spatial and spectral complexities of the inherent ecosystem dynamics. The main objective of this research was to develop and evaluate a new method for detecting and quantifying wetland changes in the Northern Gulf of Mexico (NGOM) region using multitemporal, multispectral, and multisensor remotely sensed data.

  6. Library Resource
    Journal Articles & Books
    December, 2012
    Bolivia, Central America, South America

    This study uses a combination of Landsat series data (Multispectral Scanner or MSS, Thematic Mapper or TM and Enhanced Thematic Mapper or ETM+) to map land-use and land-cover change (LULCC) from 1975 to 2001. It extends the land change record to 2008 using Chinese–Brazil Earth Resources Satellite (CBERS)-2 and CBERS-2B data on a multi-scene level. It also establishes a methodology to correct for systematic distortion inherent in CBERS imagery without the loss of information present in Landsat 7 ETM+ imagery post-2003.

  7. Library Resource
    Journal Articles & Books
    December, 2015
    Mexico

    Land cover classifications of coarse-resolution data can aid the identification and quantification of natural variability and anthropogenic change at regional scales, but true landscape change can be distorted by misrepresentation of map classes. The Lerma–Chapala–Santiago (LCS) is biophysically diverse and heavily modified by urbanization and agricultural expansion.

  8. Library Resource
    Journal Articles & Books
    December, 2011
    Mexico, United States of America

    A novel approach to image radiometric normalization for change detection is presented. The approach referred to as stratified relative radiometric normalization (SRRN) uses a time-series of imagery to stratify the landscape for localized radiometric normalization. The goal is to improve the detection accuracy of abrupt land cover changes (human-induced, natural disaster, etc.) while decreasing false detection of natural vegetation changes that are not of interest. These vegetation changes may be associated with such phenomena as phenology, growth and stress (e.g.

  9. Library Resource
    Journal Articles & Books
    December, 2012
    El Salvador

    Considering the potential of shaded coffee plantations mixed with natural vegetation for promoting biodiversity conservation, this project assessed the utility of multi-date Landsat Thematic Mapper (TM) satellite imagery for the characterization of natural vegetation versus coffee plantations in western El Salvador. For assembling a multi-temporal Landsat TM data set, we applied a regression analysis model to remove cloud cover and cloud shadows. Then, through a hybrid classification approach, a nine-class land use/land cover (LULC) map was generated.

  10. Library Resource
    Journal Articles & Books
    December, 2011
    Guatemala, Central America, South America

    Despite decades of attention by conservationists, deforestation remains a critical problem in Latin America, particularly in agricultural frontiers like the Amazon and the lowlands of Central America. The limited impact of conservation initiatives in such regions stems partly from a poor understanding of the socioeconomic and land use dynamics that typify frontiers. Moreover, conservation organizations tend to disregard the economic and policy factors at various scales that contribute to deforestation pressures in developing countries.

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