Zelkova carpinifolia (Pallas) K. Koch in Holocene sediments of Georgia—an indicator of climatic optima
نویسندگان
چکیده
منابع مشابه
ارزیابی صفات مورفولوژیک برگ در بررسی تنوع ژنتیکی Zelkova carpinifolia (Pallas) C.Koch در شمال ایران
برای معرفی صفات مورفولوژیکی مؤثر در بررسی تنوع ژنتیکی گونه آزاد، 3 رویشگاه طبیعی از این گونه در 3 استان شمالی کشور (استان گیلان، مازندران و گلستان) مورد بررسی قرار گرفت. از هر رویشگاه 10 پایه درختی انتخاب و 5 برگ از هر درخت به‌صورت تصادفی برای مطالعات مورفولوژیک بررسی شد. از 16 صفت مورد بررسی، صفات تعداد دندانه اصلی، طول و عرض برگ در ایجاد واریانس و گروه‌بندی پایه‌ها بیش‌ترین نقش را داشته و کم...
متن کاملIran's Climatic Change in the Holocene
Introduction Paleoclimatics studies can respond the many uncertainties about past climate change; an issue that is being studied seriously in the world but less attention has been paid in Iran. The Late Quaternary can be considered as Holocene. Holocene, which spans over 11,000 years ago; In general, it is considered as a period with relatively warm and stable climatic conditions. However, rec...
متن کاملDevelopment of nuclear microsatellites for the Arcto-Tertiary tree Zelkova carpinifolia (Ulmaceae) using 454 pyrosequencing1
UNLABELLED PREMISE OF THE STUDY The current study aimed at developing nuclear microsatellite markers for the relict tree species Zelkova carpinifolia, which is threatened in its natural range in the South Caucasus. • METHODS AND RESULTS Pyrosequencing of an enriched microsatellite library on the Roche FLX platform using the 454 Titanium kit produced 86,058 sequence reads, most of which con...
متن کاملMorphological differentiation of leaves in the relict tree Zelkova carpinifolia (Ulmaceae)
Zelkova carpinifolia is a relict tree occurring in refugial zones of south-western Eurasia. The main aim of the study was the biometrical comparison of the leaf characteristics of the species sampled in three regions of Transcaucasia. We aimed to test the hypotheses that (1) leaves from vegetative (L) shoots would be larger and more variable than those from fertile (S) shoots, (2) the leaves fr...
متن کاملCalcareous Nannofossils in Holocene Surface Sediments of the Persian Gulf
The effect of the paleoclimatic and paleoenvironmental changes on the structure of the bioticcommunities are stronger and better recorded in the shelf area than in the open sea. The present study isdevoted to impact of climatic events on some species of calcareous nannofossils. For this reason, 17samples of surface sediments of the Persian Gulf were studied. Preservation of calcareous nannofoss...
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ژورنال
عنوان ژورنال: Review of Palaeobotany and Palynology
سال: 2005
ISSN: 0034-6667
DOI: 10.1016/j.revpalbo.2004.09.002