نتایج جستجو برای: species distribution modeling

تعداد نتایج: 1466207  

الیاسی, آرزو, جهانی فرد, الهام, حسینی واسوکلایی, نصیبه, رجایی, فاطمه, شریفی فرد, منا, غفله مرمضی, هدی,

Background and purpose: Crimean Congo Hemorrhagic Fever (CCHF) is a dangerous viral zoonotic disease. Ticks are the main vector which transmit CCHF virus from livestock to human. The present study was done to provide a comprehensive database on major ticks in the CCHF virus transmission and their geographical dispersal in Iran. This would be of great benefit in planning for intelligent control ...

2012
Valerie Obsomer Pierre Defourny Marc Coosemans

Methods derived from ecological niche modeling allow to define species distribution based on presence-only data. This is particularly useful to develop models from literature records such as available for the Anopheles dirus complex, a major group of malaria mosquito vectors in Asia. This research defines an innovative modeling design based on presence-only model and hierarchical framework to d...

2016
Nima Madani John S. Kimball Mona Nazeri Lalit Kumar David L. R. Affleck Quazi K. Hassan

Species distribution modeling has been widely used in studying habitat relationships and for conservation purposes. However, neglecting ecological knowledge about species, e.g. their seasonal movements, and ignoring the proper environmental factors that can explain key elements for species survival (shelter, food and water) increase model uncertainty. This study exemplifies how these ecological...

Journal: :Integrative zoology 2008
Youhua Chen

Changes to the Earth's climate may affect the distribution of countless species. Understanding the potential distribution of known invasive species under an altered climate is vital to predicting impacts and developing management policy. The present study employs ecological niche modeling to construct the global potential distribution range of the yellow crazy ant (Anoplolepis gracilipes) using...

Journal: :محیط زیست طبیعی 0
آزیتا فراشی دانشجوی دکتری محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران محمد کابلی استادیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران محمود کرمی استاد گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران

nowadays, invasive species are a major threat to biodiversity and create many economic losses. modeling for predict the distribution trends of invasive species is considered as a biodiversity management tool. raccoon is a native species in north and central america, and nowadays it is an invasive species in many countries such as japan, germany and russia. raccoon was observed for the first tim...

Species richness is a simple and interpretable indicator of biodiversity and is one of the most important and and practical measurements in the rangeland ecosystems. Experimental models of richness are used to determine the points of richness of suitable and unsuitable species, and the factors affecting it. The aim of this study is to compare two methods of modeling species richness S-SDM and M...

2016
Richard G. Pearson

.........................................................................................................56 Learning Objectives............................................................................................56 Introduction and Theory.........................................................................................56 Developing a Species’ Distribution Model.......................

ژورنال: :مجله گیاهشناسی ایران 2013
مهدی زارع احمدرضا خسروی محمد رضا جوهرچی

پراکنش جغرافیایی جنس کوزینیا در ایران با استفاده از 3095 گزارش ثبت شده در منابع و یا بر اساس نمونه های هرباریومی واکاوی گردید. 241 گونه این جنس در تمام کشور گسترده اند، هرچند که حدود یک سوم از گزارش ها از استان های خراسان رضوی، تهران و فارس می باشد. این جنس 135 گونه نادر و 197 گونه انحصاری دارد. بیشترین مقدار برای شاخص حداکثر فاصله میان دو فرد از یک گونه (maxd) 1863 کیلومتر می باشد. استان های خ...

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

a total of 162 species (s) of rotifera belonging to 40 genera and 20 families examined from loktak lake, an important floodplain lake of northeast india (nei), is one of the richest assemblages of the taxon known from the indian sub-region. it merits biodiversity value as ~40.0% and ~62.0% of species recorded from india and nei, respectively. one species is new to india, 23 species are new to m...

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