One source of inaccuracy in non-linear deterministic ecological models is the growth of initial condition errors. A size-resolved pelagic ecosystem model is used to investigate the effects of changing model structural complexity on the growth rate of initial condition errors. Structural complexity is altered by: (1) changing the number of biological size-classes; and (2) changing prey size-rang...

On the basis of comprehensive analysis on connotation, assessment methods and index system of river health, combined with the national river health assessment pilot project, river health assessment system is improved by increasing indicators and correcting their weights. The weights of ecological health and functional health of each zone in the national ecological function zoning are revised. A...

In the present article, the environmental impacts of the Iraq-Kuwait war (1991) on the ecological condition and fisheries resources of the northern part of the Persian Gulf, during years 2001-2002 were studied. The investigated area included the whole stretch of the Iranian domain of the Persian Gulf from northwestern waters of the Khuzestan province to northeastern waters of the Hormuzgan prov...

The present study sustainable management of Guilan Saravan Sylvan Park was planned. The used method in the form of decision support model in three10-year period was studied for parks of various states and with considering the economic, ecological and social criteria during the years 2008 to 2038. By using hierarchical fuzzy analysis method, the reaching to an optimal level of economic, ecologic...

Four heavy metals were measured in forty-nine topsoil samples collected fromagricultural areas in Siakh-Darengoun, Iran. The goals were to investigate soil spatialdistribution patterns of metals; their potential ecological risk; and sources. The Hakansonpotential ecological risk index and index of geo-accumulation (Igeo) were used forevaluating t...