نتایج جستجو برای: salinity indicator
تعداد نتایج: 99461 فیلتر نتایج به سال:
This study examines criteria for the existence of two stable states of the Atlantic Meridional Overturning Circulation (AMOC) using a combination of theory and simulations from a numerical coupled atmosphere– ocean climate model. By formulating a simple collection of state parameters and their relationships, the authors reconstruct the North Atlantic Deep Water (NADW) OFF state behavior under a...
ecotoxicological studies that use histological techniques enjoy descriptive approach in explaining the damages to tissues. in the present study, a rank-based estimation for linear models was used to examine significant difference between levels of cypermethrin on histological changes of the liver in aphanius sophiae . the toxicity of cypermethrin associated with certain environmental factors su...
San Francisco Bay is one of the most important estuaries on the west coast of the Americas. Its water quality is controlled primarily by strearnflow from the Sacramento and San Joaquin rivers. In fact, freshwater inflow from the Sacramento-San Joaquin Delta explains 86% of the salinity variability at the mouth of the San Francisco Bay estuary [klerson et al., 19891. The massive diversion of str...
The effects of sea level rise and coastal saltwater intrusion on wetland plants can extend well above the high-tide line due to drought, hurricanes, groundwater intrusion. Research has examined how salt marsh plant communities respond increased flooding salinity, but more inland systems have received less attention. aim this study was identify whether ground layer exhibit threshold responses sa...
An understanding of the modern relationship between diatom species and elevation is a prerequisite for using fossil diatoms to reconstruct relative sea level (RSL). We described distributions from seven transects covering unvegetated subtidal environments forested uplands four tidal wetland sites (Smith Creek, Bone River, Niawiakum Naselle River) Willapa Bay, Washington, USA. compared our datas...
The use of static indicator species, in which species are expected to have a similar sensitivity or tolerance to either natural or human-induced stressors, does not account for possible shifts in tolerance along natural environmental gradients and between biogeographic regions. Their indicative value may therefore be considered at least questionable. In this paper we demonstrate how species res...
This study was conducted to determine the original indicator of microbial pollution (Escherichia coli) in the major swimming areas of Bandar Abbas. Three major swimming areas were selected in Bandar Abbas that included Soroo, Khaje Ata and Ghadir Park. During the present study, 30 sea water samples were gathered to evaluate the important indicator of microbial contamination and parameters such...
yazd province is one of the most arid regions of iran and its agriculture particularly pistachio cultivation depends on groundwater resources. in the recent decades, natural factors (drought and severe evaporation) and human activities (over- exploitation of groundwater) caused a sharp decline in the quality and quantity of groundwater in this province. in the present study, the spatial and tem...
this research was conducted in two protect and destroy region in the middle zagros, in illam province. in order to identification of ecological species group and evaluate density of regeneration, effect of many factors such as protection, vegetation, physiographic factors, physical and chemical properties of soil in study locations were studied. to achieve these purpose number of 54 plots using...
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