Changes in pollution indicators in Lake Victoria, Kenya and their implications for lake and catchment management
Monitoring of aquatic pollution is important for ascertaining the relationship between fisheries and the general ecosystem health of a lake. This study evaluated the use of changes in pollution indicators in Lake Victoria, Kenya, as a decision support tool for fisheries management and productivity....
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| Veröffentlicht in: | Lakes & Reservoirs : Science, Policy and Management for Sustainable Use Policy and Management for Sustainable Use, 2017-09, Vol.22 (3), p.199-214 |
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| creator | Kundu, Rodrick Aura, Christopher M. Nyamweya, Chrispine Agembe, Simon Sitoki, Lewis Lung'ayia, Henry B. O. Ongore, Collins Ogari, Zachary Werimo, Kenneth |
| description | Monitoring of aquatic pollution is important for ascertaining the relationship between fisheries and the general ecosystem health of a lake. This study evaluated the use of changes in pollution indicators in Lake Victoria, Kenya, as a decision support tool for fisheries management and productivity. Principal component analysis (PCA; R2 ≥ 0.5, P |
| doi_str_mv | 10.1111/lre.12187 |
| format | Article |
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O. ; Ongore, Collins ; Ogari, Zachary ; Werimo, Kenneth</creator><creatorcontrib>Kundu, Rodrick ; Aura, Christopher M. ; Nyamweya, Chrispine ; Agembe, Simon ; Sitoki, Lewis ; Lung'ayia, Henry B. O. ; Ongore, Collins ; Ogari, Zachary ; Werimo, Kenneth</creatorcontrib><description>Monitoring of aquatic pollution is important for ascertaining the relationship between fisheries and the general ecosystem health of a lake. This study evaluated the use of changes in pollution indicators in Lake Victoria, Kenya, as a decision support tool for fisheries management and productivity. Principal component analysis (PCA; R2 ≥ 0.5, P < 0.05) of physical and chemical parameters delineated sampling sites into ecological cluster zones consisting of the inner gulf (C1), mid‐gulf (C2) and open lake (C3). Test results for lead (Pb) and mercury (Hg) levels in the Nile perch tissues were found to be compliant with EU standards. The inner and mid‐gulfs of the Winam Gulf had high levels of total (1818.8 ± 102–1937.78 ± 94 cfu 100 mL−1) and faecal (390 ± 21 cfu 100 mL−1) coliforms attributable to urban sewage and industrial effluents exceeded WHO standards. Similarly, Winam Gulf was more polluted than the open lake, with higher total phosphorus and nitrogen concentrations, turbidity levels and electrical conductivity. Low phytoplankton biovolume and a low number of macroinvertebrates genera, and high zooplankton densities and pollution‐tolerant catfishes (e.g., Schilbe victoriae; Clarias gariepinus) were observed in Winam Gulf. Faecal coliforms and dissolved oxygen influenced the abundance of tolerant fish species (e.g., S. victoriae) in the lake. This study indicated a declining trend of ecological integrity in the Winam Gulf, compared with the open waters of Lake Victoria. An integrated management approach directed to minimizing pollution levels, especially in the Winam Gulf, is recommended to enhance fishery production.</description><identifier>ISSN: 1320-5331</identifier><identifier>EISSN: 1440-1770</identifier><identifier>DOI: 10.1111/lre.12187</identifier><language>eng</language><publisher>Richmond: Wiley Subscription Services, Inc</publisher><subject>Abundance ; Animal tissues ; Aquatic ecosystems ; Catchment area ; Catchments ; Clarias gariepinus ; Coliforms ; Decision analysis ; Dissolved oxygen ; Ecological monitoring ; Effluent standards ; Effluents ; Electrical conductivity ; Electrical resistivity ; Environmental indicators ; Environmental monitoring ; Faecal coliforms ; Fecal coliforms ; Fish ; Fisheries ; Fisheries management ; Fishery management ; Fishery production ; Gulfs ; Indicators ; Industrial effluents ; Industrial wastes ; Industrial wastewater ; Lake Victoria ; Lakes ; Lead ; Macroinvertebrates ; Mercury ; Mercury (metal) ; Phosphorus ; Phytoplankton ; Pollution ; Pollution indicators ; Pollution levels ; Pollution monitoring ; Principal components analysis ; Sewage ; Tissue ; Tissues ; Turbidity ; Water pollution ; water quality standards ; Zoobenthos ; Zooplankton</subject><ispartof>Lakes & Reservoirs : Science, Policy and Management for Sustainable Use, 2017-09, Vol.22 (3), p.199-214</ispartof><rights>2017 John Wiley & Sons Australia, Ltd</rights><rights>Copyright © 2017 John Wiley & Sons Australia, Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2127-9b4352ed10c158c6cf6957bff14ce766d0c154538148ef5412505ac905ab99e93</citedby><cites>FETCH-LOGICAL-c2127-9b4352ed10c158c6cf6957bff14ce766d0c154538148ef5412505ac905ab99e93</cites><orcidid>0000-0002-7135-7379 ; 0000-0001-9590-9652</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Flre.12187$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Flre.12187$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids></links><search><creatorcontrib>Kundu, Rodrick</creatorcontrib><creatorcontrib>Aura, Christopher M.</creatorcontrib><creatorcontrib>Nyamweya, Chrispine</creatorcontrib><creatorcontrib>Agembe, Simon</creatorcontrib><creatorcontrib>Sitoki, Lewis</creatorcontrib><creatorcontrib>Lung'ayia, Henry B. O.</creatorcontrib><creatorcontrib>Ongore, Collins</creatorcontrib><creatorcontrib>Ogari, Zachary</creatorcontrib><creatorcontrib>Werimo, Kenneth</creatorcontrib><title>Changes in pollution indicators in Lake Victoria, Kenya and their implications for lake and catchment management</title><title>Lakes & Reservoirs : Science, Policy and Management for Sustainable Use</title><description>Monitoring of aquatic pollution is important for ascertaining the relationship between fisheries and the general ecosystem health of a lake. This study evaluated the use of changes in pollution indicators in Lake Victoria, Kenya, as a decision support tool for fisheries management and productivity. Principal component analysis (PCA; R2 ≥ 0.5, P < 0.05) of physical and chemical parameters delineated sampling sites into ecological cluster zones consisting of the inner gulf (C1), mid‐gulf (C2) and open lake (C3). Test results for lead (Pb) and mercury (Hg) levels in the Nile perch tissues were found to be compliant with EU standards. The inner and mid‐gulfs of the Winam Gulf had high levels of total (1818.8 ± 102–1937.78 ± 94 cfu 100 mL−1) and faecal (390 ± 21 cfu 100 mL−1) coliforms attributable to urban sewage and industrial effluents exceeded WHO standards. Similarly, Winam Gulf was more polluted than the open lake, with higher total phosphorus and nitrogen concentrations, turbidity levels and electrical conductivity. Low phytoplankton biovolume and a low number of macroinvertebrates genera, and high zooplankton densities and pollution‐tolerant catfishes (e.g., Schilbe victoriae; Clarias gariepinus) were observed in Winam Gulf. Faecal coliforms and dissolved oxygen influenced the abundance of tolerant fish species (e.g., S. victoriae) in the lake. This study indicated a declining trend of ecological integrity in the Winam Gulf, compared with the open waters of Lake Victoria. An integrated management approach directed to minimizing pollution levels, especially in the Winam Gulf, is recommended to enhance fishery production.</description><subject>Abundance</subject><subject>Animal tissues</subject><subject>Aquatic ecosystems</subject><subject>Catchment area</subject><subject>Catchments</subject><subject>Clarias gariepinus</subject><subject>Coliforms</subject><subject>Decision analysis</subject><subject>Dissolved oxygen</subject><subject>Ecological monitoring</subject><subject>Effluent standards</subject><subject>Effluents</subject><subject>Electrical conductivity</subject><subject>Electrical resistivity</subject><subject>Environmental indicators</subject><subject>Environmental monitoring</subject><subject>Faecal coliforms</subject><subject>Fecal coliforms</subject><subject>Fish</subject><subject>Fisheries</subject><subject>Fisheries management</subject><subject>Fishery management</subject><subject>Fishery production</subject><subject>Gulfs</subject><subject>Indicators</subject><subject>Industrial effluents</subject><subject>Industrial wastes</subject><subject>Industrial wastewater</subject><subject>Lake Victoria</subject><subject>Lakes</subject><subject>Lead</subject><subject>Macroinvertebrates</subject><subject>Mercury</subject><subject>Mercury (metal)</subject><subject>Phosphorus</subject><subject>Phytoplankton</subject><subject>Pollution</subject><subject>Pollution indicators</subject><subject>Pollution levels</subject><subject>Pollution monitoring</subject><subject>Principal components analysis</subject><subject>Sewage</subject><subject>Tissue</subject><subject>Tissues</subject><subject>Turbidity</subject><subject>Water pollution</subject><subject>water quality standards</subject><subject>Zoobenthos</subject><subject>Zooplankton</subject><issn>1320-5331</issn><issn>1440-1770</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp1kN9LwzAQx4MoOKcP_gcBnwS75dqkaR5lzB9YEER9DVmabpltWpMO2X9vuvnqPVzuvvncHXwRugYygxjzxpsZpFDwEzQBSkkCnJPTWGcpSViWwTm6CGFLYohcTFC_2Ci3NgFbh_uuaXaD7VxsKqvV0PmDXqovgz-tjr1Vd_jFuL3CylV42BjrsW37ZqTjYMB153Ez8uN_FPWmNW7ArXJqbcbyEp3Vqgnm6u-doo-H5fviKSlfH58X92WiU0h5IlY0Y6mpgGhghc51nQvGV3UNVBue59WoU5YVQAtTMwopI0xpEdNKCCOyKbo57u19970zYZDbbuddPClBUAYZ5ZxF6vZIad-F4E0te29b5fcSiBwNldFQeTA0svMj-2Mbs_8flOXb8jjxC2jCd3c</recordid><startdate>201709</startdate><enddate>201709</enddate><creator>Kundu, Rodrick</creator><creator>Aura, Christopher M.</creator><creator>Nyamweya, Chrispine</creator><creator>Agembe, Simon</creator><creator>Sitoki, Lewis</creator><creator>Lung'ayia, Henry B. 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Faecal coliforms and dissolved oxygen influenced the abundance of tolerant fish species (e.g., S. victoriae) in the lake. This study indicated a declining trend of ecological integrity in the Winam Gulf, compared with the open waters of Lake Victoria. An integrated management approach directed to minimizing pollution levels, especially in the Winam Gulf, is recommended to enhance fishery production.</abstract><cop>Richmond</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1111/lre.12187</doi><tpages>16</tpages><orcidid>https://orcid.org/0000-0002-7135-7379</orcidid><orcidid>https://orcid.org/0000-0001-9590-9652</orcidid></addata></record> |
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| identifier | ISSN: 1320-5331 |
| ispartof | Lakes & Reservoirs : Science, Policy and Management for Sustainable Use, 2017-09, Vol.22 (3), p.199-214 |
| issn | 1320-5331 1440-1770 |
| language | eng |
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| source | Wiley Online Library All Journals |
| subjects | Abundance Animal tissues Aquatic ecosystems Catchment area Catchments Clarias gariepinus Coliforms Decision analysis Dissolved oxygen Ecological monitoring Effluent standards Effluents Electrical conductivity Electrical resistivity Environmental indicators Environmental monitoring Faecal coliforms Fecal coliforms Fish Fisheries Fisheries management Fishery management Fishery production Gulfs Indicators Industrial effluents Industrial wastes Industrial wastewater Lake Victoria Lakes Lead Macroinvertebrates Mercury Mercury (metal) Phosphorus Phytoplankton Pollution Pollution indicators Pollution levels Pollution monitoring Principal components analysis Sewage Tissue Tissues Turbidity Water pollution water quality standards Zoobenthos Zooplankton |
| title | Changes in pollution indicators in Lake Victoria, Kenya and their implications for lake and catchment management |
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