نتایج جستجو برای: and biodiversity related issues
تعداد نتایج: 16942087 فیلتر نتایج به سال:
Artificial reefs are used for increasing of aquatic biodiversity and stock rehabilitation in the word. Fish Biodiversity was evaluated in artificial reefs that is located in Bandar –E-Salakh ((Qeshm island, concrete pipe (St1)), Bandar-E-Bostaneh ((Bandar-E- Lengeh) concrete pipe, St2) and St3 (Bandar-E-Bostaneh concrete pipe, pyramidal and Reef ball) in 20 meters. For this purpose, these sele...
the current study examined iranian undergraduate efl students’ willingness to communicate with regard to their vocabulary knowledge. in general, participants were somewhat willing to communicate in english. the total mean score of 730 university students’ perception of willing to communicate was 83.53 out of 135. results, regarding four parts of willingness to communicate, revealed that part...
The concept of ecosystems services provides a robust and complementary rationale for biodiversity conservation to the traditional arguments based on intrinsic value. In principle, it also provides a mechanism for optimizing investments in biodiversity conservation and directing them to where they are most useful. This requires the valuation of ecosystem services, and in particular, the contribu...
Neutral biodiversity theory has the potential to contribute to our understanding of how macroevolutionary dynamics influence contemporary biodiversity, but there are issues regarding its dynamical predictions that must first be resolved. Here we address these issues by extending the theory in two ways using a novel analytical approach: (1) we set the absolute tempo of biodiversity dynamics by e...
teachers’ beliefs greatly influence their performance in the classroom, their choice of instructional strategies, their way of controlling the class, their dealing with the students, and their general goals and objectives. one of these beliefs is teachers’ sense of efficacy which is viewed as an important construct and has shown to be positively correlated with students’ achievement (ross, 1992...
Forests are biologically diverse systems, representing some of the richest biological areas on Earth. They offer a variety of habitats for plants, animals and micro-organisms. However, forest biodiversity is increasingly threatened as a result of deforestation, fragmentation, climate change and other stressors. Biodiversity is the variation of life forms within a given ecosystem, biome, or on t...
Theoretical Issues in Ergonomics Science Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713697886 Effects of physical workload on cognitive task performance and situation awareness Carlene M. Perry a; Mohamed A. Sheik-Nainar a; Noa Segall a; Ruiqi Ma a; David B. Kaber a aCarlene M.PerryMohamed A.Sheik-NainarN...
freshwater fish biodiversity is a precious natural asset in terms of economic, cultural and scientific interest. and yet, the inland freshwater ecosystem in malaysia is declining at a far greater rate than terrestrial ecosystems in the tropics. what happened, and what is being done to address the crisis? this paper extracts findings from the latest literature and explores overarching issues per...
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