Fossil Grasses and Sedges
نویسندگان
چکیده
منابع مشابه
Ornamental Grasses and Sedges as New Crops
INTRODUCTION Ornamental grasses and sedges have a long history. Are they a new crop? Yes, both old and new at the same time. And a crop that has had a dramatic impact on the appearance of our developed landscape, on the work of landscape architects and planting designers, on nursery producers and landscape managers, and on researchers! Millions and millions of units of grasses and sedges are cu...
متن کاملEvolution in sedges (Carex, Cyperaceae)
REZNICEK, A. A. 1990. Evolution in sedges (Carex, Cyperaceae). Can. J. Bot. 68: 1409-1432. Carex is the largest and most widespread genus of Cyperaceae, but evolutionary relationships within it are poorly understood. Subgenus Primocarex was generally thought to be artificial and derived from diverse multispicate species. Relationships of rachilla-bearing species of subgenus Primocarex, however,...
متن کاملIsoprene emission from wetland sedges
High latitude wetlands play an important role for the surface-atmosphere exchange of carbon dioxide (CO2) and methane (CH4), but fluxes of biogenic volatile organic compounds (BVOC) in these ecosystems have to date not been extensively studied. This is despite BVOC representing a measurable proportion of the total gaseous C fluxes at northern locations and in the face of the high temperature se...
متن کاملGrasses
over one’s genes? Perhaps it is because this notion resonates with a public that in the eighties and nineties the same press have bullied into believing that there is ‘a gene for everything’. In that sense, the debate is remarkably similar to the one on whether we humans (or animals in general) have such a thing as a free — or conscious — will. Much like with the idea of the vulgarised genetic ...
متن کاملEnvironmental heterogeneity and species diversity of forest sedges
1 A ®eld experiment was designed to investigate the relationship between environmental heterogeneity and species diversity in a group of sedges (Cyperaceae: Carex) growing in old-growth forest. 2 A measure of environmental quality, as perceived by the sedges, was obtained from the survival of clonal ramets of 11 species of Carex planted at 10-m intervals along each of three 1-km transect lines....
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ژورنال
عنوان ژورنال: The American Naturalist
سال: 1905
ISSN: 0003-0147,1537-5323
DOI: 10.1086/278523