نتایج جستجو برای: dry climate

تعداد نتایج: 256149  

2012
Yi-Feng Yao Angela A. Bruch Ye-Ming Cheng Volker Mosbrugger Yu-Fei Wang Cheng-Sen Li

Yuanmou Basin of Yunnan, SW China, is a famous locality with hominids, hominoids, mammals and plant fossils. Based on the published megaflora and palynoflora data from Yuanmou Basin, the climate of Late Pliocene is reconstructed using the Coexistence Approach. The results indicate a warm and humid subtropical climate with a mean annual temperature of ca. 16-17°C and a mean annual precipitation ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Adam R Lewis David R Marchant Allan C Ashworth Lars Hedenäs Sidney R Hemming Jesse V Johnson Melanie J Leng Malka L Machlus Angela E Newton J Ian Raine Jane K Willenbring Mark Williams Alexander P Wolfe

A major obstacle in understanding the evolution of Cenozoic climate has been the lack of well dated terrestrial evidence from high-latitude, glaciated regions. Here, we report the discovery of exceptionally well preserved fossils of lacustrine and terrestrial organisms from the McMurdo Dry Valleys sector of the Transantarctic Mountains for which we have established a precise radiometric chronol...

Journal: :Sustainability 2022

Tropical dry forests are among the most threatened ecosystems in world, and those occurring insular Caribbean particularly vulnerable. Climate change represents a significant threat for region small islands like Jamaica. Using Hellshire Hills protected area Jamaica, simple model was developed to project future abundance of arthropods lizards based on current sensitivities climate variables deri...

Journal: :Annual review of entomology 2016
Carla M Sgrò John S Terblanche Ary A Hoffmann

Plastic responses figure prominently in discussions on insect adaptation to climate change. Here we review the different types of plastic responses and whether they contribute much to adaptation. Under climate change, plastic responses involving diapause are often critical for population persistence, but key diapause responses under dry and hot conditions remain poorly understood. Climate varia...

2017
Monica T. Rother Thomas T. Veblen

In recent years, warming climate and increased fire activity have raised concern about post-fire recovery of western U.S. forests. We assessed relationships between climate variability and tree establishment after fire in dry ponderosa pine forests of the Colorado Front Range. We harvested and aged over 400 post-fire juvenile ponderosa pine (Pinus ponderosa) and Douglas-fir (Pseudotsuga menzies...

Journal: :Science 2012
John T Fasullo Kevin E Trenberth

An observable constraint on climate sensitivity, based on variations in mid-tropospheric relative humidity (RH) and their impact on clouds, is proposed. We show that the tropics and subtropics are linked by teleconnections that induce seasonal RH variations that relate strongly to albedo (via clouds), and that this covariability is mimicked in a warming climate. A present-day analog for future ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده زیست شناسی 1388

abstract chickpea is weak in competition of weeds that damages to it at between 40 t0 60 percent. kermanshah province is one of the most important region for chickpea fields in iran. for these reosons, weed management is necessary in this crop. in order to evaluate of herbicides and stubble control on broad leave weeds control in chickpea. experiment was conducted in agricultural research stat...

2014
Valerie Steen Susan K. Skagen Barry R. Noon

The Prairie Pothole Region (PPR) of the north-central U.S. and south-central Canada contains millions of small prairie wetlands that provide critical habitat to many migrating and breeding waterbirds. Due to their small size and the relatively dry climate of the region, these wetlands are considered at high risk for negative climate change effects as temperatures increase. To estimate the poten...

Broomcorn millet (Panicum miliaceum) was known throughout Eurasia in the second millennium BC in regions with warm, moist summers, where its cultivation reduced agricultural risk. Its cultivation during the warm, but dry months at Kyzyltepa and other Iron Age sites in western Central Asia was probably made possible through irrigation practices that were long known and originally developed in th...

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