نتایج جستجو برای: species richness

تعداد نتایج: 556166  

Journal: :بوم شناسی کشاورزی 0
اشکان عسگری کورس خوشبخت سعید صوفی زاده جعفر کامبوزیا

evaluation diversity of agricultural plants and effectiveness of management factors in non-hunting of gharaviz abstract biodiversity is the basis of agriculture. sustainable agriculture both promotes and is enhanced by biodiversity. during present study, agrobiodiversity and management factors were investigated in three villages of gharaviz area and four villages in surroundings area, in sarpol...

ژورنال: مرتع 2022
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Abstract Background and objectives: Prediction of species richness and diversity patterns are used to develop conservation strategies for biodiversity under regional and global environmental changes. Since modeling the distribution of plant species can provide useful and important information about identifying and introducing potential habitats of plant species, and also few studies have been ...

Journal: :international journal of aquatic biology 0
bhushan kumar sharma department of zoology, north-eastern hill university shillong-793022, meghalaya, india. sumita sharma department of zoology, north-eastern hill university shillong-793022, meghalaya, india. mrinal kumar hatimuria department of zoology, north-eastern hill university shillong-793022, meghalaya, india.

our plankton and semi-plankton collections from twelve floodplain lakes (beels) of majuli river island, upper assam reveal 124 rotifer species (32 genera and 17 families); these merit biodiversity value as ~52.0% and ~30.0% of species, ~68.0 and ~45.0% of  genera and ~74.0 and ~65.0% of the families of the phylum known from northeast india (nei) and india, respectively. two species are new to i...

Journal: :بوم شناسی کشاورزی 0
فخرالدین هاشمی شادگان کوروس خوشبخت عبدالمجید مهدوی دامغانی هادی ویسی هومان لیاقتی

biodiversity is an important component in sustainability assessment of agroecosystems. along with increasing or decreasing of biodiversity, ecosystem services in agroecosystems will be varied. agricultural experts take into account different factors which affect agroecosystems variation. in this study, farming systems of two areas including a protected mountainous area and also a plain – hilly ...

Forest degradation influences ecosystem sustainability and reduces plant species diversity. Plantations with coniferous trees in degraded ecosystems help the native species to become established and play a major role in preserving and improving plant diversity. This study aims at measuring and comparing the woody species diversity across different age classes of Pinus brutia and Cupressus horiz...

ژورنال: :مجله گیاهشناسی ایران 2015
طلیعه السادات موسوی احمدرضا خسروی

پراکنش جغرافیایی تیره باقلائیان (به جزء جنس گون) تجزیه و تحلیل گردیده تا با داشتن چشم اندازی از الگوی پراکنش این خانواده بتوانیم تصمیمات حفاظتی بهتری داشته باشیم. به این منظور از ١٠٤٩٨ گزارش ثبت شده ی ژئورفرنس شده از ایران استفاده گردید. با استفاده از نرم افزار diva-gis و arcview و خانه های 1° x 1° عرض/طول جغرافیایی، غنای گونه ای، گونه های انحصاری، weighted endemism، corrected weighted endemism...

Snow-fed river Pinder -a tributary of river Alaknanda in central Himalaya was explored for fish assemblages and habitat specificity. Altogether 27 fish species were reported from three orders, four families and nine genera. Cypriniformes order was dominating followed by Siluriformes and Salmoniformes. Shannon-Weiner diversity index (3.09 to 4.10) and Simpson index of diversity (0.81 to 0.92) of...

Journal: :Journal of Statistical Software 2011

Journal: :international journal of aquatic biology 0
bhushan kumar sharma [associate editor in: limnology and plankton] department of zoology, north-eastern hill university, shillong-793022, meghalaya, india. kyapaomai role sounii pou freshwater biology laboratory, department of zoology, north-eastern hill university shillong - 793 022, meghalaya, india. sumita sharma freshwater biology laboratory, department of zoology, north-eastern hill university shillong - 793 022, meghalaya, india.

a total of 90 species, belonging to 29 genera and 15 families, observed from an urban wetland of meghalaya is the species-rich rotifera assemblage known till date from any sub-tropical ecosystem of the indian sub-region. total richness (s) merits biodiversity value as ~56.0, ~ 38.0 and ~23.0 % of the species recorded from meghalaya, northeast india (nei) and india, respectively while several ro...

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