A statewide investigation of urban creek sediment toxicity was conducted in California in recognition of increased incidences of toxicity linked to pyrethroid pesticides. The goals were to examine the spatial occurrence and magnitude of sediment toxicity in California urban creeks, and to examine the role of pyrethroids in toxic urban creek sediment samples. After a preliminary screening of 90 ...

lignocellulosic resources of khoozestan province are usable for wood and paper industry. the main questions are that, which places have the best conditions are select for development of wood and paper industries? since, the methodologies of research were analytical and estimated. the research questions were tested by method of analytic hierarchy process (ahp). the results of the research were s...

background: mercury is widespread and persistent in the environment. one organic form of mercury, methylmercury (mehg), can accumulate in the food chain in aquatic ecosystems and lead to high concentrations of mehg in fish, which, when consumed by humans, can result in an increased risk of adverse effects. currently, the joint fao/who expert committee on food additives (jecfa) has established p...

Khuzestan coastal waters have high fisheries potential and ecological importance. Since different sources of stress exist in this area, the present study was conducted to evaluate ecological quality and to determine health status in Khuzestan coastal sediments based on benthic communities and their biological parameters. Seasonal sampling was done from 20 creeks of Khur-e-Mussa area in Khuzesta...

both micronuclei (mn) and binuclei (bn) as well as rapd (random amplifying polymorphism of dna) assays are newly biomarkers which are well-introduced in toxic injury and related genotoxicity studies in bivalve, fishes and even humans. however, there is no record of such studies in iranian persian gulf coast line so far. for this propose, we analyzed frequency of mn and rapd patterns in gill cel...

In the nature, larvae living in watercourses are exposed to a complex system of environmental influences. It is known that different watercourse types (creeks, brooks, streams, little rivers and medial rivers) provide conditions for larval development (water depth, flow rate, temperature, oxygen content, substrate type, nutrient supply, etc.). These can vary significantly between types, but be ...

Title of Dissertation: THE REGULATION OF BACTERIOPLANKTON CARBON METABOLISM IN A TEMPERATE SALTMARSH SYSTEM Jude Kolb Apple, Doctor of Philosophy, 2005 Dissertation Co-Directed By: Professor Paul A. del Giorgio Department of Biological Sciences Université du Québec à Montréal Professor W. Michael Kemp Horn Point Laboratory University of Maryland Center for Environmental Science This study descr...