naa a22 4500 510806228 CHVBK 20180411083419.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11625-013-0204-x doi (NATIONALLICENCE)springer-10.1007/s11625-013-0204-x Anthropogenic impacts on water quality of the lagoonal coast of Fongafale Islet, Funafuti Atoll, Tuvalu [Elektronische Daten] [Masafumi Fujita, Jumpei Suzuki, Daisaku Sato, Yuji Kuwahara, Hiromune Yokoki, Hajime Kayanne] Water pollution, evident by negative values of redox potential in waters, occurs at the lagoonal coast located near the densely populated area of Fongafale Islet on Funafuti Atoll, Tuvalu, Central Pacific. Sediment microbial quinone analysis revealed that these coastal sediments exhibit 2.7-10.4 times more microbial biomass, significantly different microbial community structure and low microbial diversity, when compared to an undisturbed natural coastal sediment. Thus, the pollution is chronic. By considering the total land use/coverage on the islet, the situation of septic tank installations, temporal changes in water redox potential and Escherichia coli numbers in the coastal waters and the spatial distribution of acid volatile sulfide in the sediments, we conclude that domestic wastewater is the primary source of pollution. This pollution is proposed to occur via the following mechanism: during ebb tides, domestic wastewater leaking from bottomless septic tanks and pit toilets run off into the lagoonal coast. Tide changes control the pollution load of domestic wastewater. The Author(s), 2013 Water pollution nationallicence Escherichia coli nationallicence Redox potential nationallicence Domestic wastewater nationallicence Septic tank nationallicence Pacific Island nationallicence Fujita Masafumi Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut Suzuki Jumpei Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Japan aut Sato Daisaku Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut Kuwahara Yuji Center for Water Environment Studies, Ibaraki University, Hitachi, Japan aut Yokoki Hiromune Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut Kayanne Hajime Department of Earth and Planetary Science, The University of Tokyo, Tokyo, Japan aut Sustainability Science Springer Japan 8/3(2013-07-01), 381-390 1862-4065 8:3<381 2013 8 11625 https://doi.org/10.1007/s11625-013-0204-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11625-013-0204-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fujita Masafumi Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut NATIONALLICENCE 700 1- Suzuki Jumpei Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Japan aut NATIONALLICENCE 700 1- Sato Daisaku Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut NATIONALLICENCE 700 1- Kuwahara Yuji Center for Water Environment Studies, Ibaraki University, Hitachi, Japan aut NATIONALLICENCE 700 1- Yokoki Hiromune Department of Urban and Civil Engineering, Ibaraki University, Hitachi, Japan aut NATIONALLICENCE 700 1- Kayanne Hajime Department of Earth and Planetary Science, The University of Tokyo, Tokyo, Japan aut NATIONALLICENCE 773 0- Sustainability Science Springer Japan 8/3(2013-07-01), 381-390 1862-4065 8:3<381 2013 8 11625 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer