نتایج جستجو برای: sensitive habitat and also vegetation sub criteria

تعداد نتایج: 16946374  

2012
Eric M. Wood Anna M. Pidgeon Volker C. Radeloff Nicholas S. Keuler

a r t i c l e i n f o Keywords: Band 4 Foliage-height diversity Horizontal vegetation structure Image texture Infrared air photo Landsat NDVI Wildlife habitat Ecologists commonly collect data on vegetation structure, which is an important attribute for characterizing habitat. However, measuring vegetation structure across large areas is logistically difficult. Our goal was to evaluate the degre...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

fluorescence chemical sensors for the highly sensitive and selective determination of pb2+ , hg2+, co2+ and fe3+ ions in aqueous solutions are described. the ion sensing system was prepared by incorporating lipophilic ligand (l) as a neutral ion-selective fluoroionophore in the plasticized pvc membrane containing sodium tetraphenylborate or potasium tetrakis (p-chlorophenyl) borate as a liphoph...

2011
Kan-ichiro Mochizuki Keitarou Hara Shin’ichi Okamoto

The UN Conference on Environment and Development (UNCED) Agenda 21 issue for sustainable development emphasizes on an integrated approach for the maintenance and management of land resources. Conservation of biodiversity has become an important environmental issue after the UNCED. Habitat fragmentation caused by the sprawl of urban development is becoming one of the major environmental problems...

ژورنال: مهندسی دریا 2016

With the increase in the pollution caused by oil industry developments and related infrastructures in the last century, setting priorities for decisions in sensitive coastal areas to oil spills is important. This study uses the reports in the field of environmental sensitivity index in shorelines and applies the Delphi method to determine the criteria and sub-criteria allowed for adjusting the ...

علیرضا امینی حاجی‌ آبادی, , جمال ‌الدین خواجه دین, , سیدعلی میرمحمدی میبدی, ,

A number of halophytic species as Salicornia europea, Halocnemum strobilaceum, Aeluropus lagopoides, and Aeluropus littoralis were found to occupy a significant portion of the total vegetation of the surrounding area at the Zayande-Roud inlet to Gavkhoony wetland. However, their ecological demands and bioenvironmental factors by which vegetation community composition has been affected is not un...

ژورنال: علوم آب و خاک 2002
علیرضا امینی حاجی‌ آبادی, , جمال ‌الدین خواجه دین, , سیدعلی میرمحمدی میبدی, ,

A number of halophytic species as Salicornia europea, Halocnemum strobilaceum, Aeluropus lagopoides, and Aeluropus littoralis were found to occupy a significant portion of the total vegetation of the surrounding area at the Zayande-Roud inlet to Gavkhoony wetland. However, their ecological demands and bioenvironmental factors by which vegetation community composition has been affected is not un...

2002
Kathleen M. Bergen Daniel G. Brown Eric J. Gustafson M. Craig Dobson

Mapping for biodiversity informatics requires information on habitat so that known species occurrences may be extrapolated to maps of potential species occurrences. In the case of vegetation requirements for habitat, most current datasets of actual vegetation have been derived from optical (e.g. aerial photography or Landsat) remotely sensed data. These data are largely limited to describing ho...

2008
Heidi L. Michaels Jack F. Cully HEIDI L. MICHAELS JACK F CULLY

-This study was conducted to determine landscape and fine-scale vegetative variables associated with breeding Loggerhead Shrikes (Lanius ludovicianus) on Fort Riley Military Reservation, Kansas. Because Fort Riley is an Army training site, the influences of training disturbance to the vegetation, and range management practices on bird habitat patterns were also investigated. Breeding birds were...

Journal: :desert 2011
n. shakerian gh.r. zehtabian h. azarnivand h. khosravi

desertification refers to land degradation phenomenon in arid, semi-arid and dry sub-humid areas, resulting from various factors including climate variation and human activities. for evaluation and mapping of desertification many research have been conducted leading to regional and local models. in this research, among different existing methods imdpa was selected and desertification intensity ...

Journal: :Ecological applications : a publication of the Ecological Society of America 2009
J R Thomson A J Moilanen P A Vesk A F Bennett R Mac Nally

Restoration of native vegetation is required in many regions of the world, but determining priority locations for revegetation is a complex problem. We consider the problem of determining spatial and temporal priorities for revegetation to maximize habitat for 62 bird species within a heavily cleared agricultural region, 11000 km2 in area. We show how a reserve-selection framework can be applie...

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