منابع مشابه
Ecology and Management of California Grasslands
A soil-phytolith analysis casts doubt on the widely-held belief that fragments of grassland in the East Bay hills of the San Francisco Bay Area, California, are the relictual remnants of formerly continuous perennial grassland, dominated by bunchgrass species
متن کاملEffects of Wind Energy Development on Nesting Ecology of Greater Prairie-Chickens in Fragmented Grasslands
Wind energy is targeted to meet 20% of U.S. energy needs by 2030, but new sites for development of renewable energy may overlap with important habitats of declining populations of grassland birds. Greater Prairie-Chickens (Tympanuchus cupido) are an obligate grassland bird species predicted to respond negatively to energy development. We used a modified before-after control-impact design to tes...
متن کاملEcology of Musk Thistle (Carduus nutans) Seed Germination for Grasslands of Temperate Climates
Musk thistle is an invasive weed that is widely distributed throughout much of North America, including grasslands in temperate climates of the midwest USA. A series of laboratory and greenhouse experiments were conducted to determine the effect of various environmental factors on germination of musk thistle seeds. In temperature-fluctuation experiments, seed germination was greater than 65% in...
متن کاملAtmosphere, ecology and evolution: what drove the Miocene expansion of C4 grasslands?
Grasses using the C(4) photosynthetic pathway dominate today's savanna ecosystems and account for approximately 20% of terrestrial carbon fixation. However, this dominant status was reached only recently, during a period of C(4) grassland expansion in the Late Miocene and Early Pliocene (4-8 Myr ago). Declining atmospheric CO(2) has long been considered the key driver of this event, but new geo...
متن کاملThe montane grasslands of the Western Ghats, India: Community ecology and conservation
The montane (shola) grasslands of Western Ghats, South India are a component of a landscape mosaic including the better-studied shola forests. The conservation of the grasslands depends upon understanding their ecology. This review compiles available information and aims to evaluate the conservation potential of these grasslands. Most studies on these grasslands are descriptive in nature. There...
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ژورنال
عنوان ژورنال: Nature
سال: 1957
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1801173b0