نتایج جستجو برای: interesting taxa
تعداد نتایج: 156246 فیلتر نتایج به سال:
In this study, the epilithic diatoms in the samples taken from two stations in Hazar Lake (Elazig-Turkey) between June 2015 and November 2015 were analyzed. In total, 28 taxa belonging to the diatoms were recorded during the study. The diatom taxa Cymbella (6 taxa), Navicula (4 taxa) and Nitzschia (4 taxa) were represented by the most taxa.
phytoplankton taxa composition of the caspian sea were evaluated by using samples collected at 12 stations along the iranian coast of the caspian sea between 1996 and 2010. this study identified 158 phytoplankton species consisted of diatoms (70 species), dinoflagellates (23 species), chlorophytes (29 species), cyanophytes (31 species), and euglenoids (5 species). the dominant species were the ...
Partial mitochondrial COI sequences (barcoding fragment) were explored for the understanding of the species boundaries of Baetis vernus group taxa (Ephemeroptera, Baetidae) in northern Europe. We sampled all species of this group occurring in Finland, but focused on taxa for which morphological and taxonomical confusion have been most apparent. The sequence matrix comprised 627 nucleotides for ...
the genus fritillaria comprises of 165 taxa of medicinal, ornamental and horticultural importance. evolutionary relationships in this genus is an interesting research area, attracting many researchers. in this study, phylogenetic relationships among 18 native to endemic species in iran belonging to four subgenera petilium, theresia, rhinopetalum and fritillaria, are assessed using chloroplast t...
In this study, diatoms in epipsammic samples, which were taken from two stations selected in Kelkit Creek (Tokat/Turkey) between March and December 2018, were analyzed. During the study, a total of 25 taxa belonging to diatoms were recorded. The diatom species represented by the highest number of taxa were Cymbela (4 taxa), Nitzschia (4 taxa), and Navicula (3 taxa). Sorensen similarity index be...
for a given riemannian manifold (m,g),it is an interesting question to study the existence of a conformal diffemorphism (also called as a conformal transformation) f : m ! m such that the metric g? = fg has one of the following properties: (i)(m; g?) has constant scalar curvature. (ii)(m; g?) is an einstein manifold.
زیربخش alyssum sect. odontarrhema subsect. stipitata به عنوان زیربخش جدیدی معرفی می گردد و گونه alyssum stipitatum به عنوان تیپ آن مشخص می شود. گونه های زیر به عنوان گونه های جدیدی شرح داده می شوند. alyssum mozaffarianii, a. stipitatum, farsetia assadii گونه های زیر برای اولین بار از ایران گزارش می گردند. alyssum argenteum, a. callichroum, a. condensatum, a. harputicum, a. obtusifolium, a. ...
در این پژوهش، مطالعه آناتومی برگ نه گونه از جنس بید متعلق به دو زیر جنس مختلف با استفاده از میکروسکوپ نوری انجام گرفت که عبارتند از: salix aegyptiaca l., s. caprea l., s. cinerea l., s. elbursensis boiss., s. euxina i. v. belyaeva, s. issatissensis maassoumi, moeeni & rahiminejad, s. triandra l., s. wilhelmsiana m. beib., s. zygostemon boiss. (s. cinerea × s. elbursensis) صفات تشریحی مخت...
در بازنگری جنس gaertneragropyron در ایران، که بر اساس مطالعه نمونه های هرباریومی و جمع آوریهای جدید و مشاهدات صحرائی صورت گرفت، یک واریته جدید (agropyron cristatum subsp. pectinatum var. minor) و یک زیر گونه جدید (agropyron cristatum subsp. hamadanicum) از غرب ایران (همدان)، معرفی می شود. واریته جدید با داشتن ساقه های کوتاهتر، سنبله ظریف و گلوم و لمای کوتاهتر، از agropyron cristatum subsp. pect...
trifolium species and cultivars are considered important forage crops iran , growing throughout the country. the present article considered the karyotypic details of trvulim taxa using multivariate statistical analysis. taxa studied included: trifolim restylinatum (six populations: shazand, soriyan, kordestan, harati, enaj and lordegan), t. repense, t, fragverm, t. prateme and t, alexandrinm. s...
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