Terrestrial gastropods, especially those dwelling in dry habitats such as the Mediterranean, are highly susceptible to dehydration. In this study, the use of refuges by Iberus gualtieranus gualtieranus and Sphincterochila candidissima is compared. These two species belong to families with different distribution ranges, but they live in sympatry on a mountain in southern Spain with a dry Mediter...

in order to study adaptation ability of 15 commercial olive cultivars, this experiment was carried out using a randomized complete block design with three replication during the period from 2007 to 2009 in dry-warm climate of sar-pol-e-zehab dallaho olive station of kermanshah province. in this experiment, vegetative and reproductive traits were measured according to i.o.o.c. descriptors. flora...

Substantial rhythms in clean wool, wax and suint production have been observed for dry, spring-shorn Merino ewes maintained od a uniform plane of nutrition in exposed pens. Changes can be related directly to mean daily temperatures. Reversed rhythms were recorded for dry, spring-shorn, grazing sheep where both nutrition and climate were changing. Thus climate corrections would enhance the nutri...

The effects of exogenous abscisic acid (ABA) on the acclimation of Picea asperata to water deficit were investigated in two populations originating from wet and dry climate regions of China. Exogenous ABA was sprayed onto the leaves, and changes in plant growth and structure, gas exchange, water use efficiency (WUE), endogenous ABA content, and antioxidant enzyme levels were monitored. The resu...

It is important to establish that climate models can accurately simulate the observed present-day  uctuations of water vapour. In particular, water-vapour and cloud-radiative feedbacks are intrinsically linked to processes governing relative-humidity distribution and variability. To explore these issues, clear-sky radiances, sensitive to upper-tropospheric relative humidity, are simulated with...

Growth ring analysis on silicified coniferous woods from the Missão Velha Formation (Araripe Basin - Brazil) has yielded important information about periodicity of wood production during the Early Cretaceous in the equatorial belt. Despite warm temperatures, dendrological data indicate that the climate was characterized by cyclical alternation of dry and rainy periods influenced by cyclical pre...