the scientific panel on “landscape ecology” was held in nazar research center by presence of professors and experts in “landscape” and “ecology”, in order to discuss the relation of these concepts and definition of “landscape ecology”. in this panel arranged by dr. seyed amir mansouri, director of landscape architecture department at university of tehran and president of nazar research center, ...

Station d’Ecologie Expérimentale du CNRS a Moulis, USR 2936, 09200 Moulis,, France Department of Evolutionary Biology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, 752 36 Uppsala, Sweden Department of Animal Ecology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, 752 36 Uppsala, Sweden Department of Biological Sciences, Ohio University, 131 Life Sciences Bu...

Reaction systems constitute a class of nonlinear dynamical systems relevant in many engineering fields such as chemical engineering, biotechnology and ecology. In this paper, we address the problem of the reduction of the order of such systems under the assumption that some reaction rates are much faster than the others. This can be achieved through a change of coordinates which transforms the ...

Chemiluminescent response of grass carp (Ctenopharyngodon idella) was assessed to determine the effect of various concentrations of diazinon on the phagocytosis of grass carp in order to evaluate the fish immunity after exposure to this toxic chemical. One hundred and twenty specimens with individual weight of 850±155g were exposed to various concentrations of diazinon at 1, 2 and 4mg/L provide...