نتایج جستجو برای: species distribution modeling

تعداد نتایج: 1466207  

2007
A. GUISAN N. E. ZIMMERMANN J. ELITH C. H. GRAHAM S. PHILLIPS A. T. PETERSON

Data characteristics and species traits are expected to influence the accuracy with which species’ distributions can be modeled and predicted. We compare 10 modeling techniques in terms of predictive power and sensitivity to location error, change in map resolution, and sample size, and assess whether some species traits can explain variation in model performance. We focused on 30 native tree s...

2016
Marika Galanidi Gokhan Kaboglu Kemal C. Bizsel

Benthic infaunal species and communities have been extensively used to evaluate quality of the marine environment. Within the MSFD, community composition is addressed most commonly through Descriptor 6 (Seafloor integrity), criterion 6.2 (Condition of benthic communities). At the same time, the Directive has stipulations for addressing and assessing indicators linked with pressures in an explic...

Journal: رستنیها 2003
I. MEHREGAN, M. MOUSSAVI, N. NASRABADI

Biodiversity of the genus Medicago in Iran was studied. Distribution of two perennial species M. sativa and M. lupulina mainly conforms to the mountainous regions of Iran. Among the other annual species of this genus, M. rigidula has the most similar distribution to the distribution of perrenial species in mountainous regions. Most species of Medicago (apart from M. sativa and M. lupulina) are ...

2017
Claudio Mota-Vargas Jorge Galindo-González Octavio R Rojas-Soto

In Mexico, the Long-tailed Wood-Partridge (Dendrortyx macroura) is distributed in the mountains of the Trans-Mexican Volcanic Belt, Sierra Madre del Sur and Sierra Norte de Oaxaca; while the Bearded Wood-Partridge (D. barbatus) is distributed in the Sierra Madre Oriental (SMO). There is a controversial overlap in distribution (sympatry) between these two species (on the Cofre de Perote and Pico...

Journal: :Ecological Informatics 2013
Ruiju Tong Autun Purser Janine Guinan Vikram Unnithan

a r t i c l e i n f o The coral species Paragorgia arborea and Primnoa resedaeformis are abundant and widely distributed gorgonians in North Atlantic waters. Both species add significant habitat complexity to the benthic environment, and support a host of invertebrate species. Mapping their distribution is an essential step in conservation and resource management , but challenging as a result o...

2014
Sergio A. Estay Fabio A. Labra Roger D. Sepulveda Leonardo D. Bacigalupe

Pine sawyer beetle species of the genus Monochamus are vectors of the nematode pest Bursaphelenchus xylophilus. The introduction of these species into new habitats is a constant threat for those regions where the forestry industry depends on conifers, and especially on species of Pinus. To obtain information about the potential risk of establishment of these insects in Chile, we performed clima...

ژورنال: :مجله گیاهشناسی ایران 2013
الهام حاتمی احمد رضا خسروی

پراکندگی جغرافیایی گونه های  c3وc4 از تیره اسفناج در ایران با استفاده از 11151 رکورد ژئورفرنس شده واکاوی شد. تیره اسفناج با داشتن 45 جنس و 204 گونه، به طور وسیعی در ایران انتشار یافته است. تعداد گونه های c4 در این تیره تقریباٌ دو برابر گونه های c3 می باشد. اطلاعات سازمان دهی شده در برنامه ms access به کمک نرم افزار diva-gis و با استفاده از خانه گریدهای 10×10 کیلومتر و محدوده دایره ای همسایه نقشه...

ژورنال: علوم آب و خاک 2008
خداقلی, مرتضی , سلطانی کوپایی, سعید , یغمایی, لیلا ,

In order to determine the effect of climatic factors on distribution of Artemisia aucheri and Artemisia sieberi in Isfahan province, thirty nine most important climatic elements in ecological condition of these species were selected. Using a factor analysis method, the most important factors in distribution of these species were determined. These factors which cover 92.3% of the total variance ...

2017
Jason L Robinson James A Fordyce

Among the greatest challenges facing the conservation of plants and animal species in protected areas are threats from a rapidly changing climate. An altered climate creates both challenges and opportunities for improving the management of protected areas in networks. Increasingly, quantitative tools like species distribution modeling are used to assess the performance of protected areas and pr...

2013
Kimberly M. Dohms Theresa M. Burg

The genetic impact of barriers and Pleistocene glaciations on high latitude resident species has not been widely investigated. The Clark's nutcracker is an endemic North American corvid closely associated with Pinus-dominated forests. The nutcracker's encompasses known barriers to dispersal for other species, and glaciated and unglaciated areas. Clark's nutcrackers also irruptively disperse lon...

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