نتایج جستجو برای: ecological information continuously

تعداد نتایج: 1289213  

Journal: :Marine pollution bulletin 2009
J C Marques A Basset T Brey M Elliott

The ability to achieve ecological sustainability and the sustainable development of marine and estuarine ecosystems constitutes a complex major challenge and depends on many driving forces, often conflicting with each other. In particular, there are three major drivers: (a) the search for human well-being, health and safety, (b) the maintenance of ecological sustainability and environmental equ...

Journal: :J. Symb. Log. 2003
Tomek Bartoszynski Saharon Shelah Boaz Tsaban

In a work of Just, Miller, Scheepers and Szeptycki it was asked whether certain diagonalization properties for sequences of open covers are provably closed under taking finite or countable unions. In a recent work, Scheepers proved that one of the properties in question is closed under taking countable unions. After surveying the known results, we show that none of the remaining classes is prov...

Journal: :مرتع و آبخیزداری 0
نیما شاکری بروجنی دانش آموخته کارشناسی ارشد مرتع داری، دانشگاه صنعتی اصفهان، ایران حسین بشری استادیار، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران مصطفی ترکش اصفهانی استادیار، دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران

this study sought to develop a decision support system (dss) for assisting range managers to detect range condition and make informed decisions about feridan county rangelands. all plant species frequencies were measured in 31 range sites with various grazing histories using step point method. four hundred points along four perpendiculars 30 meters transects were measured in each site and grazi...

Journal: :Contaduría y Administración 2016

2014
Bridget Freisthler Sharon Lipperman-Kreda Melina Bersamin Paul J. Gruenewald

Prevention researchers have found that drinking in different contexts is related to different alcohol problems. Where and with whom people drink affects the types of alcohol-related problems they experience. Consequently, identifying those contexts that result in the greatest number of problems provides a novel opportunity to target new prevention efforts aimed at those contexts. However, ident...

2011
Mario Espinoza Thomas J. Farrugia Christopher G. Lowe

a r t i c l e i n f o It is thought that some elasmobranchs use shallow temperate estuaries during warmer months because these habitats may provide thermal physiological advantages. However, extensive loss and degradation of southern California bays and estuaries has reduced coastal species access to estuarine habitats. While restoration of southern California estuaries has increased over the l...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید