Occurrence and Seasonal Variation of Nitrate in Natural Waters of Sardinia (italy)
نویسندگان
چکیده
Nitrate in surface (187 samples) and ground (126 samples) waters collected in Sardinia (Italy) shows a large range of concentrations: from <1 to 249 mg/L. The highest median value of nitrate occurs in groundwater samples, especially in shallow wells, and spring waters circulating in granite environments. In surface waters, nitrate generally increases as flow increases following intense precipitation. Main sources of nitrate in the studied waters might derive from agriculture and farming.
منابع مشابه
Seasonal Variation of Earthworm Abundances and Biomass in Natural Forests and Plantations (North of Iran)
Soil productivity and plant growth are usually affected by biological activities of earthworms. The objective of this study was a comparative evaluation of earthworm abundances in 20-year-old plantations of Alder, Oak, Maple and Cypress with the adjacent natural mixed broad-leaved deciduous forest in the Caspian region of Iran. In this research one sample plot, each 1 ha; was selected in every ...
متن کاملSeasonal variations of catch composition of drift nets in Hormozgan waters (Persian Gulf)
The study was conducted to obtain some information about temporal and spatial variations of multifilament drift gillnet catch communities in coastal waters of Hormozgan Province (Persian Gulf) from October to March 2014. Totally, seven families were identified including Scombridae, Carangidae, Carcharhinidae, Sphyranidae, Stromatidae, Belonidae, and Pesttodidae with total biomass of 73.03%, 12....
متن کاملEffect of Ripening Time and Seasonal Changes on Microbial and Physicochemical Properties of Inland Pecorino Abruzzese Cheese
Background: Hand-made cheeses are usually prepared following dissimilar procedures which influence the quality and the organoleptic properties of the products. Objective of the present study was to evaluate how manufacturing season and ripening time affect hand-made Pecorino Abruzzese cheese. Methods: Microbiological and physicochemical characteristics were investigated on raw milk cheeses pro...
متن کاملEcological study in an area supplied with Drinking Water from Cyanotoxin Contaminated Reservoirs
Objectives Sardinia populations experienced continuous shortage of water resources for thousands of years. To solve this problem, during 1950-1980, the main rivers were dammed creating 45 reservoirs which rapidly became eutrophic or hypertrophic, with toxic cyanobacterial blooms and a generally poor water quality. In order to investigate relations between some cancers occurrence and drinking ...
متن کاملSeasonal Variations of Seawater Properties in the Southwestern Coastal Waters of the Caspian Sea
Seasonal variations of the seawater properties (e.g. temperature, salinity, density and chlorophyll-a) in western part of the southern coastal waters of the Caspian Sea near the Iranian coast were studied. A portable CTD probe was applied for profiling from sea surface to bottom at 23 stations. Maximum depth of the profiling stations was more than 470 m in the study area. Vertical structure of ...
متن کامل