Seed dynamics of the mast seeding tussock grass Ampelodesmos mauritanica in Mediterranean shrublands
نویسندگان
چکیده
منابع مشابه
the study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
Restoration of mediterranean-type woodlands and shrublands
There are only five mediterranean-climate regions (MCRs) on Earth – the Mediterranean Basin, most of California, central Chile, southern South Africa, and south-central and south-western Australia. They all have cool, or cold, and relatively wet winters alternating with long, hot, and dry summers. Spring and autumn seasons are ephemeral in comparison, and highly variable. During much of the yea...
متن کاملThe functional response of a hoarding seed predator to mast seeding.
Mast seeding involves the episodic and synchronous production of large seed crops by perennial plants. The predator satiation hypothesis proposes that mast seeding maximizes seed escape because seed predators consume a decreasing proportion of available seeds with increasing seed production. However, the seed escape benefits of masting depend not only on whether predators are satiated at high l...
متن کاملMast seeding and Lyme disease.
We wish to comment on two issues relating to a prediction raised in the article by Randolph1 about our work2. Randolph argues that because ‘low acorn production and moderate mouse densities are the norm [our] data do not explain the cause of the severe acorn failures and contingent crash in mouse populations that might initiate [gypsy] moth outbreaks’. We made no attempt to explain masting peri...
متن کاملValuation of climate-change effects on Mediterranean shrublands.
In general, the socioeconomic analysis of natural systems does not enter into the realms of natural science. This paper, however, estimates the human-welfare effects of possible physicochemical and biological impacts of climate change on Mediterranean shrublands over the coming 50 years. The contingent choice method was applied to elicit the trade-offs in perceived values for three climate-sens...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2000
ISSN: 0022-0477,1365-2745
DOI: 10.1046/j.1365-2745.2000.00460.x