نتایج جستجو برای: climatic variables

تعداد نتایج: 341954  

خسروی, رسول, همامی, محمود رضا, منصوره, ملکیان,

Climatic change can impose physiological constraints on species and can therefore affect species distribution. Bioclimatic predictors, including annual trends, regimes, thresholds and bio-limiting factors are the most important independent variables in species distribution models. Water and temperature are the most limiting factors in arid ecosystem in central Iran. Therefore, mapping of climat...

Journal: :international journal of advanced biological and biomedical research 2013
ayat rohina mohammad karami ayob bahranifard mohsen dehghan

sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. in this study, sensitivity of evapotranspiration from penmann-mantith, penmann-kimberly (1996), penman-kimberly (1972) and penmann (1984)  and hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) wa...

Journal: :Remote Sensing 2012
Hannes Feilhauer Kate S. He Duccio Rocchini

Vegetation mapping based on niche theory has proven useful in understanding the rules governing species assembly at various spatial scales. Remote-sensing derived distribution maps depicting occurrences of target species are frequently based on biophysical and biochemical properties of species. However, environmental conditions, such as climatic variables, also affect spectral signals simultane...

Journal: :Remote Sensing 2010
Ignacio Melendez-Pastor Jose Navarro-Pedreño Magaly Koch Ignacio Gómez Encarni I. Hernández

Mediterranean coastal areas are experiencing rapid land cover change caused by human-induced land degradation and extreme climatic events. Vegetation index time series provide a useful way to monitor vegetation phenological variations. This study quantitatively describes Enhanced Vegetation Index (EVI) temporal changes for Mediterranean land-covers from the perspective of vegetation phenology a...

2016
Jiaxin Jin Ying Wang Min Cheng Audrey L. Mayer

Intact Forest Landscape (IFL) is of great value in protecting biodiversity and supporting core ecological processes. It is important to analyze the spatial variation in the growth dynamics of IFL. This study analyzed the change of the Normalized Difference Vegetation Index (NDVI) during the growing season (April–October) for boreal (45 ̋ N–70 ̋ N) IFLs and the correlation with climatic variables ...

2011
P. David Polly Jussi T. Eronen

The climatic envelope of a species is a multivariate space whose axes are climatic variables and whose boundaries are the upper and lower values of those variables that occur within the species’ geographic range. If climate limits the geographic ranges of species, then the climate envelope can be used to predict which ones will occur together in a palaeofauna or to reconstruct palaeoclimate bas...

2017
Evan P Tanner Monica Papeş R Dwayne Elmore Samuel D Fuhlendorf Craig A Davis

Ecological niche models (ENMs) have increasingly been used to estimate the potential effects of climate change on species' distributions worldwide. Recently, predictions of species abundance have also been obtained with such models, though knowledge about the climatic variables affecting species abundance is often lacking. To address this, we used a well-studied guild (temperate North American ...

Ayat Rohina, Ayob Bahranifard Mohammad Karami Mohsen Dehghan

Sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. In this study, sensitivity of evapotranspiration from Penmann-Mantith, Penmann-Kimberly (1996), Penman-Kimberly (1972) and Penmann (1984)  and Hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) wa...

Ayat Rohina, Ayob Bahranifard Mohammad Karami Mohsen Dehghan

Sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. In this study, sensitivity of evapotranspiration from Penmann-Mantith, Penmann-Kimberly (1996), Penman-Kimberly (1972) and Penmann (1984)  and Hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) wa...

Journal: :Biological reviews of the Cambridge Philosophical Society 2017
Diego P Vázquez Ernesto Gianoli William F Morris Francisco Bozinovic

While average temperature is likely to increase in most locations on Earth, many places will simultaneously experience higher variability in temperature, precipitation, and other climate variables. Although ecologists and evolutionary biologists widely recognize the potential impacts of changes in average climatic conditions, relatively little attention has been paid to the potential impacts of...

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