Betula szaferi a new species of the genus Betula L. from Poland
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چکیده
منابع مشابه
Two new species and a new record of the genus Astragalus (Fabaceae) from NE Iran
During the study on the specimens of Astragalus sect. Ammodendron in the herbarium of Ferdowsi University of Mashhad (FUMH), based on the last and most recent sources, two new species, i.e. A. microfoliolatus sp. nova and A. rashed-mohasseli sp. nova were found and described. Morphological evidence confirmed that the belonging of these taxa to Astragalus sect. Ammodendron. The most important di...
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افراد بی‌بال زنده‌زا‌ی شته‌ی Dysaphis inulae sp. n. جمع‌آوری شده از روی Inula britanica توصیف می‌شود و زیرگونه‌ی D. lappae cynarae (Theobald) جمع‌آوری شده از روی Silybum marianum مجدداً توصیف شده و به عنوان رکورد جدید از ایران گزارش می‌گردد. کلید شناسائی گونه‌های جنس Dysaphis Boerner که روی گیاهان خانواده‌ی Asteraceae زندگی می‌کنند نیز ارایه شده است.
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Klebs (12) reported in 1914 that the growth of beach, oak, ash, and hornbeam could be maintained even in winter if they were placed under continuous electric light. Since Klebs' report on the effect of day length on the growth of woody plants, there have been many studies pertaining to photoperiodism and dormancy in woody plants. They were amply reviewed by Samish (21), Wareing (24,26), and Nit...
متن کاملThe effect of meteorological factors on airborne Betula pollen concentrations in Lublin (Poland)
The present study investigated the pattern of the birch atmospheric pollen seasons in Lublin in the period 2001-2010. Pollen monitoring was conducted using a Lanzoni VPPS 2000 sampler. The atmospheric pollen seasons were determined with the 98% method. Regression analysis was used to determine correlations between meteorological conditions and the pattern of the birch pollen season. On average,...
متن کاملArtificial neural network model of the relationship between Betula pollen and meteorological factors in Szczecin (Poland)
Birch pollen is one of the main causes of allergy during spring and early summer in northern and central Europe. The aim of this study was to create a forecast model that can accurately predict daily average concentrations of Betula sp. pollen grains in the atmosphere of Szczecin, Poland. In order to achieve this, a novel data analysis technique--artificial neural networks (ANN)--was used. Samp...
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ژورنال
عنوان ژورنال: Acta Societatis Botanicorum Poloniae
سال: 2014
ISSN: 2083-9480
DOI: 10.5586/asbp.1986.033