نتایج جستجو برای: ecological condition

تعداد نتایج: 412491  

Journal: :iranian journal of environmental sciences 0
luu pham vietnam academy of science and technology (vast), institute of tropical biology, 85 tran quoc toan street, district 3, ho chi minh city, vietnam

the present study aims to have a comparative study of the results, from biological monitoring as well as conventional method, based on physico-chemical variables. water quality index (wqi) and planktonic diatom metrics have been used to determine water quality and ecological conditions of the dong nai river (dnr) and canonical correspondence analysis (cca) to find out the main environmental var...

2007
Robert W. Howe Ronald R. Regal Gerald J. Niemi Nicholas P. Danz JoAnn M. Hanowski

We introduce a new method for quantifying the ecological condition (C) of sites based on documented species’ responses to environmental stress. Preliminary research is needed to establish species-specific logistic functions, representing probabilities of finding individual species across an explicit reference gradient, ranging from maximally stressed (C = 0) to minimally stressed (C = 10) local...

Journal: :Land 2021

In 2021, the Biden administration signed an executive order to protect 30% of American lands by 2030. Accomplishing this ambitious goal in U.S. requires understanding relative contribution public and private toward supporting biodiversity. New approaches are needed because existing focus on quantity habitat without incorporating quality. To fill need, we developed a 30 m resolution national con...

Journal: :Environmental Science & Technology 2016

Journal: :international journal of environmental research 2012
s. rasouli m. makhdoum farkhondeh h.r. jafari r. suffling b. kiabi

identification of rapid degradation of ecological resources requires effective environmental monitoring including ecological integrity assessment .our first aim is to analyze ecological integrity in a landscape context while developing a method to assess integrity in spite of a dearth of historical data. we used a spatial-temporal reference framework for land cover maps for assessing ecologica...

Journal: Pollution 2017

The present study aims to have a comparative study of the results, from biological monitoring as well as conventional method, based on physico-chemical variables. Water quality index (WQI) and planktonic diatom metrics have been used to determine water quality and ecological conditions of the Dong Nai River (DNR) and Canonical Correspondence Analysis (CCA) to find out the main environmental var...

Journal: :International Journal of Circumpolar Health 2004

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید