نتایج جستجو برای: ecological factors

تعداد نتایج: 1163995  

Journal: :محیط شناسی 0
علی موحد assist. prof., dept. of geography & urban planning, shahid chamran university, ahvaz-iran نسیم زاده دباغ m.sc. of environment, ahvaz-iran

in order to evaluate the ecological potential for assessing the ecotourism application a region was confined to dez river. mcharg method and networks method were applied. according to makhdoum’s method, to determine environmental units, the ecological resources of the region were surveyed. then evaluation of the ecological potential was carried out on the basis of ecotourism and qualified regio...

2011
Martin Reynolds

The notion of systemic thinking for social and ecological responsibility is deconstructed and its holistic potential examined from a critical systemic perspective informed by the ideas of the systems philosopher, C. West-Churchman. Systemic thinking involves being critically aware of the boundaries in which we work and the boundaries to which we apply our expertise. It involves making boundary ...

Journal: :محیط شناسی 0
سیدحمید فلاح میری همت الله پیردشتی میرخالق ضیاء تبار احمدی حسن قلیچ نیا

this research was carried out based on systematic analysis approach for evaluation of ecological resources capability of kasilian representative catchment for agricultural land use. the study area is located in southern of mazandaran province. in this study we used topography digital data, paper maps, climatology data, satellite images and gis, database and spreadsheet software. the process of ...

The objective of this survey was to provide a software ecological model to predict the incidence of WSSV in Litopenaeus vannamei ponds of Gwater area located in southeastern of Iran. The coding and grouping of effective factors, which were involved in the occurrence of White Spot Syndrome Virus (WSSV) including temperature, salinity, oxygen, pH, ammonia, silica, pond preparation and management ...

2003
Martin Reynolds

The notion of systemic thinking for social and ecological responsibility is deconstructed and its holistic potential examined from a critical systemic perspective informed by the ideas of the systems philosopher, C. West-Churchman. Systemic thinking involves being critically aware of the boundaries in which we work and the boundaries to which we apply our expertise. It involves making boundary ...

2008
Julián Monge-Nájera

Ecological biogeography studies the factors that define the spatial distribution of species in the present time. This review summarises recent contributions on ecological biogeography. Most recent articles report environmental factors such as temperature, humidity and salinity as key elements in the ecological biogeography of many species (followed by other organisms and genetic characteristics...

2009
Gabrielle Bouleau Christine Argillier Yves Souchon Carole Barthélémy Marc Babut Jean-François Breton

Social and scientific factors are deeply enmeshed in each other within the development and the use of ecological indicators (EI). Yet low research has assessed which factors contribute to selecting ecological indicators on the long-term. This article proposes to study the historical construction of EI by examining ecological, political, and social background of specific places where EI were dev...

The study was carried out in the Ilam Oak forest that is located in the west part of Iran. The objective of this research was to determine the plant ecological groups and site classification in this region. Data were collected from 117 sample plots using the systematic-random sampling method. The size of sampling plots was 20 m?20 m for the tree and shrub species and 1.5 m ?1.5 m for herbaceous...

2012
Hualin Xie Chih-Chun Kung Yanting Zhang Xiubin Li

Ecological land is like the "liver" of a city and is very useful to public health. Ecological land change is a spatially dynamic non-linear process under the interaction between natural and anthropogenic factors at different scales. In this study, by setting up natural development scenario, object orientation scenario and ecosystem priority scenario, a Cellular Automation (CA) model has been es...

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