نتایج جستجو برای: bioclimatic variables

تعداد نتایج: 314449  

Journal: :Geospatial health 2014
Cristina Ballart Irene Guerrero Xavier Castells Sergio Barón Soledad Castillejo M Magdalena Alcover Montserrat Portús Montserrat Gállego

The aim of the present study was to determine the role of specific environmental and climatic factors affecting the distribution and density of Phlebotomus ariasi and P. perniciosus , the proven vectors for Leishmania infantum in Spain. An entomological study was carried out in July 2006 in the province of Lleida with sticky traps set in their diurnal resting places at altitudes ranging from 86...

Journal: :Plant biology 2013
H R Hamasha A N Schmidt-Lebuhn W Durka M Schleuning I Hensen

Strong environmental gradients can affect the genetic structure of plant populations, but little is known as to whether closely related species respond similarly or idiosyncratically to ecogeographic variation. We analysed the extent to which gradients in temperature and rainfall shape the genetic structure of four Stipa species in four bioclimatic regions in Jordan. Genetic diversity, differen...

2015
Katie Leach Ruth Kelly Alison Cameron W. Ian Montgomery Neil Reid

Climate change during the past five decades has impacted significantly on natural ecosystems, and the rate of current climate change is of great concern among conservation biologists. Species Distribution Models (SDMs) have been used widely to project changes in species' bioclimatic envelopes under future climate scenarios. Here, we aimed to advance this technique by assessing future changes in...

Journal: :Zbornik radova Geografskog instituta Jovan Cvijic, SANU 2013

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و زبانهای خارجی 1390

la sociolinguistique est la partie de la linguistique ayant pour objet l’étude du langage sous son aspectsocioculturel. william labov est considéré dans la tradition anglo-saxonne, comme le fondateur de la sociolinguistique modern. c’est lui qui, en 1966, publie “the social stratification of english in new york city” ( la stratification social de l’anglais à new york). la recherche sociolingu...

2016
David J Lorenz Diego Nieto-Lugilde Jessica L Blois Matthew C Fitzpatrick John W Williams

Increasingly, ecological modellers are integrating paleodata with future projections to understand climate-driven biodiversity dynamics from the past through the current century. Climate simulations from earth system models are necessary to this effort, but must be debiased and downscaled before they can be used by ecological models. Downscaling methods and observational baselines vary among re...

Journal: :Proceedings. Biological sciences 2014
Jessica L Metcalf Stefan Prost David Nogués-Bravo Eric G DeChaine Christian Anderson Persaram Batra Miguel B Araújo Alan Cooper Robert P Guralnick

One of the grand goals of historical biogeography is to understand how and why species' population sizes and distributions change over time. Multiple types of data drawn from disparate fields, combined into a single modelling framework, are necessary to document changes in a species's demography and distribution, and to determine the drivers responsible for change. Yet truly integrated approach...

2010
David Outomuro Antonio Torralba-Burrial Francisco J. Ocharan

Using bioclimatic belts as habitat and distribution predictors, the present study examines the implications of the potential distributions of the three Iberian damselflies, Calopteryx Leach (Odonata: Calopterygidae), with the aim of investigating the possible consequences in specific interactions among the species from a sexual selection perspective and of discussing biogeographical patterns. T...

Journal: :Remote Sensing 2023

Soil organic carbon (SOC) is an essential component, which soil quality depends on. Thus, understanding the spatial distribution and controlling factors of SOC paramount to achieving sustainable management. In this study, prediction for Ourika watershed in Morocco was done using four machine learning (ML) algorithms: Cubist, random forest (RF), support vector (SVM), gradient boosting (GBM). A t...

Journal: :JES. Journal of Engineering Sciences 2007

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