Comparison of soil seed banks of habitats distributed along an altitudinal gradient in northern Iran
نویسندگان
چکیده
منابع مشابه
Geochemical characterization of the forest loess soils along a precipitation gradient in Northern Iran
Introduction: The loess-paleosol sequences in Northern Iran are important archives represent several cycles of Quaternary climate change and can be used to complete the information gap on loess between Europe and central Asia. Loess geochemistry reflects paleoweathering conditions and it can be used to determine the nature and provenance of loess deposits. In the Caspian Lowlands, a pronounced...
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Crop landraces are managed populations that evolve in response to gene flow and selection. Cross-pollination among fields, seed sharing by farmers, and selection by management and environmental conditions play roles in shaping crop characteristics. We used common gardens to explore the local adaptation of maize (Zea mays ssp. mays) landrace populations from Chiapas, Mexico to altitude. We sowed...
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Males of the coqui treefrog, Eleutherodactylus coqui, produce a distinct two-note 'co-qui' advertisement call from sunset to midnight throughout most of the year. Previous work established that both the spectrotemporal aspects of the call and the frequency of highest inner-ear sensitivity change with altitude above sea level. These variations are such that the frequency of the emitted co-note c...
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با توجه به تحریم های بین المملی علیه صنعت بیمه ایران امکان استفاده از بازارهای بین المملی بیمه ای برای نفتکش های ایرانی وجود ندارد. از طرفی از آنجایی که یکی از نوآوری های اخیر استفاده از بازارهای مالی به منظور ریسک های فاجعه آمیز می باشد. از اینرو در این پایان نامه سعی شده است با استفاده از این نوآوری ها با طراحی اوراق اختیارات راهی نو جهت بیمه گردن نفت کش های ایرانی ارائه نمود. از آنجایی که بر...
Regional dynamics of a patchily distributed herbivore along an altitudinal gradient
1. Metapopulation dynamics should be more important at the borders of species distributions due to two main factors: (1) populations are less abundant and fluctuate more at the borders than in the centre of their distributions, and (2) resources in the range margins of species distributions are often more scarce and fragmented. 2. Most metapopulation studies have been performed in a fraction of...
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ژورنال
عنوان ژورنال: Flora - Morphology, Distribution, Functional Ecology of Plants
سال: 2013
ISSN: 0367-2530
DOI: 10.1016/j.flora.2013.04.004