نتایج جستجو برای: ecological conditions

تعداد نتایج: 935412  

Journal: :جنگل و فرآورده های چوب 0
سیدمعین الدین زمانی دانشجوی کارشناسی ارشد جنگل داری دانشگاه یاسوج، ‏یاسوج، ایران رقیه ذوالفقاری عضو هیئت علمی ‏‏دانشکدة کشاورزی و پژوهشکدة منابع طبیعی دانشگاه یاسوج، ‏یاسوج، ایران سهراب الوانی نژاد عضو هیئت علمی ‏‏دانشکدة کشاورزی و پژوهشکدة منابع طبیعی دانشگاه یاسوج، ‏یاسوج، ایران

today, determination of the ecological species groups for current and future situation of forest and its relationship with environmental factors is necessary for forest management. for this purpose, 50 plots were established in altitude range of 2091- 2811 meters above sea level and 600 hectare in protected area of western dena. four ecological groups was identified using twinspan analysis that...

2017
Harry H Marshall Emma I K Vitikainen Francis Mwanguhya Robert Businge Solomon Kyabulima Michelle C Hares Emma Inzani Gladys Kalema-Zikusoka Kenneth Mwesige Hazel J Nichols Jennifer L Sanderson Faye J Thompson Michael A Cant

Early-life ecological conditions have major effects on survival and reproduction. Numerous studies in wild systems show fitness benefits of good quality early-life ecological conditions ("silver-spoon" effects). Recently, however, some studies have reported that poor-quality early-life ecological conditions are associated with later-life fitness advantages and that the effect of early-life cond...

Journal: :محیط شناسی 0
حسن دارابی استادیار گروه مهندسی طراحی محیط، دانشکدة محیط زیست، دانشگاه تهران ایمان سعیدی مربی گروه مهندسی فضای سبز، دانشگاه ملایر

introduction urban landscape is experiencing rapid changes which put all urban domains under pressures. these processes revolutionize urban landscape into spaces without ecologic values. the sustainability of green patches and corridors has been scathed by lack of ecological approaches in planning and design. therefore, urban green spaces structures and functions have been damaged. green spaces...

Journal: :PeerJ 2015
Murray A Rudd

Using an international dataset compiled from 121 sites in 87 marine protected areas (MPAs) globally (Edgar et al., 2014), I assessed how various configurations of design and management conditions affected MPA ecological performance, measured in terms of fish species richness and biomass. The set-theoretic approach used Boolean algebra to identify pathways that combined up to five 'NEOLI' ( No-t...

Forest roads can create small- scale climate change. These changes can vary with the road age and topographic conditions. This study aimed to identify ecological species group as well as study the relationship between vegetation and environmental factors based on the road age. The study was carried out in three-districts of Nav- Asalem in Watershed 7 of forests of North of Iran. Therefore, 140 ...

2017
Sterling Somers

A representational approach to ecological psychology is presented. This paper identifies a computational-level commonality in ecological psychology research related to passability of apertures. It is argued that a cognitive mechanism capable of comparing the geometric properties of an environment and the geometric properties of the agent can be used to support judgments for action in space.

Journal: :Presence 1998
Pavel Zahorik Rick L. Jenison

An alternative view of presence is introduced based on existential philosophy and ecological psychology. This view favors a Heideggerian/Gibsonian metaphysic over the more conventional rationalistic orientation. In this alternative view, notions of subjective presence and objective presence no longer exist. Presence is instead tied to one’s successfully supported action in the environment, this...

2011
Jonas Linderoth

This paper outlines a framework for understanding gameplay from the perspective of ecological psychology. According to this perspective, gameplay can be described in terms of perceiving, acting on and transforming the affordances that are related to a game system or to other players in a game. Challenges in games have an emphasis on perceiving suitable actions and/or performing suitable actions...

2010
Zhiquan Zhao Xiaoyan Tao

Study on land ecological safety can help people acquire the states and changes of land ecosystem. It is of great significance to realize the reasonable utilization of land resource. The paper constructed an evaluation index system of land ecological safety based on Pressure-State-Response model. Then the paper combined fuzzy mathematics and matterelement theory to establish an evaluation model ...

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