caa a22 4500 467903174 CHVBK 20180406152825.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s10661-005-9180-7 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9180-7 Integrating Remote Sensing Approach with Pollution Monitoring Tools for Aquatic Ecosystem Risk Assessment and Managment: A Case Study of Lake Victoria(UGANDA) [Elektronische Daten] [Silvia Focardi, Ilaria Corsi, Stefania Mazzuoli, Leonardo Vignoli, Steven Loiselle, Silvano Focardi] Aquatic ecosystems around the world, lake, estuaries and coastal areas are increasingly impacted by anthropogenic pollutants through different sources such as agricultural, industrial and urban discharges, atmospheric deposition and terrestrial drainage. Lake Victoria is the second largest lake in the world and the largest tropical lake. Bordered by Tanzania, Uganda, and Kenya, it provides a livelihood for millions of Africans in the region. However, the lake is under threat from eutrophication, a huge decline in the number of native fish species caused by several factors including loss of biodiversity, over fishing and pollution has been recently documented. Increasing usage of pesticides and insecticides in the adjacent agricultural areas as well as mercury contamination from processing of gold ore on the southern shores are currently considered among the most emergent phenomena of chemical contamination in the lake. By the application of globally consistent and comprehensive geospatial data-sets based on remote sensing integrated with information on heavy metals accumulation and insecticides exposure in native and alien fish populations, the present study aims at assessing the environmental risk associated to the contamination of the Lake Victoria water body on fish health, land cover distribution, biodiversity and the agricultural area surrounding the lake. By the elaboration of Landsat 7 TM data of November 2002 and Landsat 7 TM 1986 we have calculated the agriculture area which borders the Lake Victoria bay, which is an upland plain. This process has greatly enhanced nutrient loading to the soil, which is subsequently transported to the lake by rain or as dry fall. All the data has been insert in the Geographical information System (ARCGIS) to be upgraded and consulted. Heavy metals in fish fillets showed concentrations rather low except for mercury being higher than others as already described in previous investigations. In the same tissue, cholinesterases activity (ChE) as an indicator of insecticides exposure showed significant differences among fish species in both activity and sensitivity of selected inhibitor insecticides. This integrated approach aims at identifying and quantifying selected aquatic environmental issues which integrated with monitoring techniques such as contaminant concentrations and biological responses to insecticides exposure in fish populations will provide a scientific basis for aquatic zones management and assist in policy formulations at the national and international levels. Springer Science+Business Media, Inc., 2005 remote sensing nationallicence ARCGIS nationallicence Lake Victoria nationallicence heavy metals nationallicence insecticide exposure nationallicence fish nationallicence Focardi Silvia Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut Corsi Ilaria Dipartimento di Scienze Ambientali" G.Sarfatti”, Università di Siena, Via Mattioli 4, 53100, Siena, Italy aut Mazzuoli Stefania Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut Vignoli Leonardo Dipartimento di Biologia, Università degli Studi Roma Tre, Viale G. Marconi 446, 00146, Roma, Italy aut Loiselle Steven Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut Focardi Silvano Dipartimento di Scienze Ambientali" G.Sarfatti”, Università di Siena, Via Mattioli 4, 53100, Siena, Italy aut Environmental Monitoring and Assessment Kluwer Academic Publishers 122/1-3(2006-11-01), 275-287 0167-6369 122:1-3<275 2006 122 10661 https://doi.org/10.1007/s10661-005-9180-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9180-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Focardi Silvia Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut NATIONALLICENCE 700 1- Corsi Ilaria Dipartimento di Scienze Ambientali" G.Sarfatti”, Università di Siena, Via Mattioli 4, 53100, Siena, Italy aut NATIONALLICENCE 700 1- Mazzuoli Stefania Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut NATIONALLICENCE 700 1- Vignoli Leonardo Dipartimento di Biologia, Università degli Studi Roma Tre, Viale G. Marconi 446, 00146, Roma, Italy aut NATIONALLICENCE 700 1- Loiselle Steven Dipartimento di Scienze e Tecnologie Chimiche e dei Biosistemi., Università di Siena, Via Aldo Moro 1, 53100, Siena, Italy aut NATIONALLICENCE 700 1- Focardi Silvano Dipartimento di Scienze Ambientali" G.Sarfatti”, Università di Siena, Via Mattioli 4, 53100, Siena, Italy aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 122/1-3(2006-11-01), 275-287 0167-6369 122:1-3<275 2006 122 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer