wheat (triticum aestivum) is one of the major crops in the world and iran. any plan for improvement of wheat yield requires sufficient information on different stages of crop life cycle and the effects of meteorological parameters. the purpose of this study was developing suitable regression models for prediction the length of pheonological stage of winter wheat in three different regions of ir...

One of the major issues of increasing agricultural production, is adaptation of technology to specific climatic variables in cultivated areas. Knowing the weather and climatic condition and periodic yearly and multi-year changes of meteorological phenomena and deviations from normal values ​​are of major requirements of modern agriculture. In this study, daily, monthly and annual weather data o...

One of the major issues of increasing agricultural production, is adaptation of technology to specific climatic variables in cultivated areas. Knowing the weather and climatic condition and periodic yearly and multi-year changes of meteorological phenomena and deviations from normal values ​​are of major requirements of modern agriculture. In this study, daily, monthly and annual weather data o...

BACKGROUND Improving knowledge about influenza transmission is crucial to upgrade surveillance network and to develop accurate predicting models to enhance public health intervention strategies. Epidemics usually occur in winter in temperate countries and during the rainy season for tropical countries, suggesting a climate impact on influenza spread. Despite a lot of studies, the role of weathe...

BACKGROUND Climatic change is expected to lead to changes in species' geographical ranges. Adaptation strategies for biodiversity conservation require quantitative estimates of the magnitude, direction and rates of these potential changes. Such estimates are of greatest value when they are made for large ensembles of species and for extensive (sub-continental or continental) regions. METHODOL...

Dacryodes edulis is a fruit tree growing naturally in the rainforests of Central Africa. To provide data to scientists and forest managers for the habitat of D. edulis in the wild, the study of ecological niche and environmental adaptation was carried out. The geographical coordinates of 168 collections of wild individuals and 19 climatic parameters were treated under Geographical Information S...

Abstract Climatic and hydrological variation is of utmost importance in regions the globe facing water scarcity river intermittency (e.g. areas under Mediterranean influence). The main aim this study was to compare macroinvertebrate community structure its bioindicator value (i.e. waterbody ecological status) streams from three Portuguese (Regions C, N S), representing distinct climatic feature...

Interest in climatic variability on time-scales of decades to centuries has grown rapidly in the last five years. Some of this interest has been engendered by the need to gain a better understanding of natural climatic variability in order to resolve more clearly the climatic signature of enhanced greenhouse warming. However, this focus on decadal and interdecadal fluctuations in climate has al...

BACKGROUND Despite the availability of several studies to clarify taxonomic problems on the highly threatened yews of the Hindu Kush-Himalaya (HKH) and adjacent regions, the total number of species and their exact distribution ranges remains controversial. We explored the use of comprehensive sets of morphological, molecular and climatic data to clarify taxonomy and distributions of yews in thi...