نتایج جستجو برای: carex pamirica
تعداد نتایج: 972 فیلتر نتایج به سال:
The sedges (family Cyperaceae) are an economically and ecologically important monocot group dating back at least to the Paleocene. While modern genera are mostly unknown before the Oligocene, several extinct taxa are recognized as the earliest sedges. Their affinities have been unclear until now, because they are found as isolated, often abraded fruits or endocarps. Exceptionally preserved sedg...
گونه‌های Carex kukkonenii و Bolboschoenus glaucus به عنوان گونه‌های جدید برای ایران از استانهای تهران و گیلان گزارش داده می‌شوند. همچنین محل جمع‌آوری گونه‌ها در ایران و پراکنش آنها در دنیا ارایه می‌شود.
0 Subalpine meadow communities are in~uenced by edaphic and microclimatic gradi! ents\ and should be a}ected by climate change that a}ects these local controls[ We used pollen preserved in meadow soils to investigate the long!term interaction of these factors in a 0!ha subalpine meadow in the Olympic Mountains\ Washington\ USA[ 1 To describe the spatial scale at which soil pollen is related to ...
Montane moist meadows of western North America are relatively unique in that they are characterized by annual cycles of spring inundation followed by summer drought. Thus, plants adapted to these ecosystems must cope with a wide range of environmental conditions. We compared gas exchange and water relations of upper canopy leaves and leaf area index (LAI) of three dominant montane meadow gramin...
We evaluated dormancy loss in seeds of 14 Carex species (C. atherodes, C. brevior, C. comosa, C. cristatella, C. cryptolepis, C. granularis, C. hystericina, C. lacustris, C. pellita, C. scoparia, C. stipata, C. stricta, C. utriculata, C. vulpinoidea) under growing season and stratification conditions and determined the temperature requirements for germination. Seeds were germinated for 1 year a...
Major public DNA databases — NCBI GenBank, the DNA DataBank of Japan (DDBJ), and the European Molecular Biology Laboratory (EMBL) — are invaluable biodiversity libraries. Systematists and other biodiversity scientists commonly mine these databases for sequence data to use in phylogenetic studies, but such studies generally use only the taxonomic identity of the sequenced tissue, not the specime...
Seeds of four colonizing species which occur together in a recently revegetated sedge meadow were tested for germination after storage under three different conditions. Seeds were tested at an alternating temperature regime of 21° C dark, and 32° C light. Three species, Bidens frondosa, B. coronata, and Scirpus cyperinus germinated most successfully when stored under moist-cool conditions. Germ...
cardamine flexuosa with از خانواده cruciferae و carex orbicularis boott subsp. orbicularis از cyperaceae برای اولین بار درایران به ترتیب از مناطق هیرکانی (استان مازندران) و ایرانی-تورانی (استان کرمان) گزارش می شوند. اکولوژی، پراکنش جغرافیایی و مشکلات تاگزونومی هر یک از گونه های بالا بحث می شود. همچنین تصویر واضحتری از پراکنش و اکولوژی cardamine tenera gmel. در ایران ارائه می گردد.
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