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multi-level analysis of the relationship between environmental factors and questing Ixodes ricinus dynamics in Belgium

Journal Articles & Books
Dezembro, 2012
Bélgica
Europa

BACKGROUND: Ticks are the most important pathogen vectors in Europe. They are known to be influenced by environmental factors, but these links are usually studied at specific temporal or spatial scales. Focusing on Ixodes ricinus in Belgium, we attempt to bridge the gap between current “single-sided” studies that focus on temporal or spatial variation only. Here, spatial and temporal patterns of ticks are modelled together. METHODS: A multi-level analysis of the Ixodes ricinus patterns in Belgium was performed.

Land Change in Eastern Mediterranean Wood-Pasture Landscapes: The Case of Deciduous Oak Woodlands in Lesvos (Greece)

Journal Articles & Books
Dezembro, 2015
Grécia

In Mediterranean Europe, wood-pasture landscapes with oak woodlands as emblematic ecosystems are undergoing rapid land-use change, which may threaten their legacy as hotspots of biodiversity, ecosystem services, and cultural heritage. The objective of this study was to quantify land cover changes and transitions as well as the dynamics of oak woodland patterns and densities over 50 years in two municipalities at the center and edges of Quercus macrolepis distribution in Northern Lesvos (Greece).

Effect of cutting height on forage production of Brachiaria sp. in the piedmont Plains of Colombia

Journal Articles & Books
Dezembro, 2011
Colômbia

To determine the effect of cutting height on forage production of the grass species Brachiaria decumbens, Brachiaria humidicola, Brachiaria dictyoneura, and Brachiaria brizantha this experiment was carried out at Corpoica’s La Libertad Research Center (Villavicencio, Colombia), under typical conditions found in the piedmont region heights were evaluated 0, 5, 10 and 20 cm in pastures B. decumbens, B. humidicola, B. dityoneura cv. Llanero and 0, 10, 20 and 30 cm for B. brizantha cv. Toledo. The evaluations were conducted during the rainy and dry seasons of 2009 and 2010.

Optimal conservation investment for a biodiversity‐rich agricultural landscape

Journal Articles & Books
Dezembro, 2012

This study develops a theoretical and empirical framework for optimal conservation planning using satellite land cover data and economic data from a farm survey. A case study is presented for a region within the South‐west Australia Biodiversity Hotspot (Nature 403, 853). This Biodiversity Hotspot is a focus for conservation investment as it combines a relatively high level of biodiversity with severe threat to the biodiversity from agriculture. The conservation planning model developed determines the optimal set of bush fragments for conservation.

Multivariate Approach for Mapping Fire Ignition Risk: The Example of the National Park of Cilento (Southern Italy)

Journal Articles & Books
Dezembro, 2015
Itália

Recent advances in fire management led landscape managers to adopt an integrated fire fighting strategy in which fire suppression is supported by prevention actions and by knowledge of local fire history and ecology. In this framework, an accurate evaluation of fire ignition risk and its environmental drivers constitutes a basic step toward the optimization of fire management measures.

Habitat Selection by the Invasive Species Burmese Python in Southern Florida

Journal Articles & Books
Dezembro, 2016

Burmese Pythons (Python bivitattus) are large generalist predators that have established an expanding breeding population in Florida. As a first step in understanding current distributions, and therefore spread potential, we assessed diurnal habitat selection by Burmese Pythons in the southern Everglades using radiotelemetry. Sixteen individual pythons were radio-tracked between September 2006 and December 2009. Habitat variables included land cover, habitat edges, surface water depth, and change in water depth.

Quality assessment of Landsat surface reflectance products using MODIS data

Journal Articles & Books
Dezembro, 2012

Surface reflectance adjusted for atmospheric effects is a primary input for land cover change detection and for developing many higher level surface geophysical parameters. With the development of automated atmospheric correction algorithms, it is now feasible to produce large quantities of surface reflectance products using Landsat images. Validation of these products requires in situ measurements, which either do not exist or are difficult to obtain for most Landsat images.

Multinomial regression for analyzing macroinvertebrate assemblage composition data

Journal Articles & Books
Dezembro, 2012
Estados Unidos

Macroinvertebrate species composition data are often expressed as proportional abundances when assessing water-quality conditions or responses to disturbance. Proportional abundances represent the probability of belonging to one of many mutually exclusive and exhaustive groups (taxa). Proportional abundances have some unique properties that must be considered when analyzing these data: 1) the probabilities of group membership must sum to 1 and 2) a change in any 1 group affects all other groups.

definition of potential infiltration areas in Guaratinguetá watershed, Paraíba do Sul Basin, Southeastern Brazil: an integrated approach using physical and land-use elements

Journal Articles & Books
Dezembro, 2012

This work describes the methodological approach used for mapping the potential infiltration areas of the Guaratinguetá watershed (160 km2), situated in Southeastern Brazil. The method is considered a qualitative approach, which takes into account thematic maps (geology, pedology, geomorphology, and land use/land cover) and the precipitation spatial distribution. A group of experts in Earth Sciences and Geotechnical Engineering has applied an infiltration potential scale factor that ranges from 5 (highest influence) to 1 (lowest influence).

Land use and land cover change in the Colombian Andes: dynamics and future scenarios

Journal Articles & Books
Dezembro, 2013

Land use and land cover changes (LUCC) are recognized as one of the most relevant drivers of biodiversity loss in ecosystems. Through the analysis of satellite images, this article quantifies the LUCC that occurred between 1985 and 2008 in the Colombian Andes. Four submodels of changes were analyzed: deforestation, crop intensification, conversion to pastures, and abandonment.

Remote Sensing and GIS Approach for Delineation of Groundwater Potential and Groundwater Quality Zones of Western Doon Valley, Uttarakhand, India

Journal Articles & Books
Dezembro, 2013
Índia

Groundwater exploration in the Western Doon valley has been carried out to delineate the groundwater potential and groundwater quality zones suitable for domestic purposes based on the integrated use of Remote Sensing and Geographical Information Systems (GIS). The Western Doon Valley, occupying broad synclinal troughs in the evolving fold-thrust system of sub-Himalaya, which is filled by post-Siwalik fluvial and debris flow deposits in the late Quaternary-Holocene.