نتایج جستجو برای: range establishment

تعداد نتایج: 728328  

Landscape groundcover plants are a diverse group of trailing or spreading species that naturally form continuous soil coverage.Ground cover plants that were used in this study consisted of vegetative propagules of: Vinca minor L. ٬Variegatum’, Vinca minor L. ٬Green’, Oxalis brasiliensis G. Lodd, Trifolium repens L., Phyla nodiflora L. and Frankenia thymifolia Desf. The aim of this study was to ...

Journal: :پژوهش آب در کشاورزی 0

continuous availability of soil water is an important factor for plant growth. both lack of adequate access to water in soils, or adequate oxygen in saturated soils, may reduce or even stop plant growth. to study the behavior of pistachio seedling at various moisture levels and to determine non-limiting water range for its growth, a greenhouse experiment with a completely randomized design was ...

2016
Heidi C. Zimmer Catherine A. Offord Tony D. Auld Patrick J. Baker

Translocation can reduce extinction risk by increasing population size and geographic range, and is increasingly being used in the management of rare and threatened plant species. A critical determinant of successful plant establishment is light environment. Wollemia nobilis (Wollemi pine) is a critically endangered conifer, with a wild population of 83 mature trees and a highly restricted dist...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده شیمی 1392

in the present work, a simple and sensitive method was developed for determination of morphine and heroin using gold nanoparticles as resonance rayleigh scattering (rrs) and colorimetric technique’s probe. synthesized gold nanoparticles by sodium citrate reduction method have a negative charge layer on their surfaces because of self-assembled citrate anions on their surface. binding of morphin...

Journal: :Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases 2014
Sarah A Hamer Graham J Hickling Edward D Walker Jean I Tsao

The center of origin theory predicts that genetic diversity will be greatest near a specie's geographic origin because of the length of time for evolution. By corollary, diversity will decrease with distance from the origin; furthermore, invasion and colonization are frequently associated with founder effects that reduce genetic variation in incipient populations. The blacklegged tick, Ixodes s...

Journal: :Annals of botany 2014
C G Willis J C Hall R Rubio de Casas T Y Wang K Donohue

BACKGROUND AND AIMS Dispersal and establishment ability can influence evolutionary processes such as geographic isolation, adaptive divergence and extinction probability. Through these population-level dynamics, dispersal ability may also influence macro-evolutionary processes such as species distributions and diversification. This study examined patterns of evolution of dispersal-related fruit...

Journal: :آمایش سرزمین 0
امید کرمی کارشناس ارشد جنگل داری، دانشگاه علوم کشاورزی و منابع طبیعی ساری سیدمحمّد حسینی نصر . استادیار گروه جنگل داری، دانشگاه علوم کشاورزی و منابع طبیعی ساری حمید حمید جلیل وند دانشیار گروه جنگل داری، دانشگاه علوم کشاورزی و منابع طبیعی ساری میرحسن میریعقوب زاده . دانشجوی دکتری آبخیزداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری

inappropriate patterns and drastic changes in land-use have caused the severe environmental crisis. therefore, it is necessary to accomplish any plan in relation to establishment of different activities with respect to land capabilities and land-use evaluation thought. in this study, ecological capabilities and the site selection of land uses in babolrood basin, mazandaran province were evaluat...

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