Description: Das Projekt "Influence of human activities on the aquatic environment of Sancha Lake in Sichuan province, China (Chengdu Science and Technology Bureau, China)" wird/wurde gefördert durch: Chengdu Science and Technology Bureau / Sichuan Provincial Bureau of Environmental Protection (SEPB). Es wird/wurde ausgeführt durch: Universität Basel, Umweltgeowissenschaften.Sancha Lake in Sichuan Province, Southwest China, is impacted by a serious problem of eutrophication. The major human activity prior to fish farming was terrestrial agriculture onshore and the aquatic environment in the reservoir was oligotrophic until 1985. The aquatic environment of Sancha Lake turned eutrophic dramatically with the introduction of fish farming in 1985 and other industrial activities from 2000 onwards. Although there were several measures by the local government to reduce anthropogenic input drastically for the remediation of Sancha Lake since 2005, the aquatic environment is still eutrophic today. Fish farming in cages in Sancha Lake expanded from the initial cage area of 1,000 m2 in the late 1980s to a peak area of 255,300 m2 in 2005 but was largely reduced in 2010. In the process of cultivating fish, at least 10% of fish feed was estimated to deposit directly at the bottom of the reservoir, leading to an accelerated sedimentation rate of bottom sediments in Sancha Lake. The large variations of fish farming activities in the history in Sancha Lake allow us quantify the influence of fish farming on the vertical and spatial distribution, speciation and mobility of C, N, P and metals in the lake water and sediments. Global aquaculture production has grown at an average rate of 8.8% annually since 1980 and is expected to further increase in the future. Therefore, our findings will provide scientific knowledge to improve and restore the reservoirs ecological environment affected by fish farming.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Seen ? Aquakulturproduktion ? Eutrophierung ? Fisch ? Ökologie ? Phosphor ? Stickstoff ? Umweltauswirkung ? China ? Fischzucht ? Futtermittel ? Renaturierung ? Metall ? Gelöster organischer Kohlenstoff ? Vertikale Landwirtschaft ? Gewässergrund ? Kommunalverwaltung ? Mensch ? Aquatisches Ökosystem ? Schadstoffmobilisierung ? Trophiegrad ? Wasserspeicher ? Sediment ? Sanierungsmaßnahme ? Jahresmittelwert ? Sedimentdynamik ? Globale Aspekte ? Umweltschutz ? Maßnahme ? Sedimentation ? Kenngröße ? Anthropogener Einfluss ? Umwelt ? Landwirtschaft ? Gebiet ? Vermehrung ? Eutrophie ?
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2009-07-01 - 2016-08-31
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