caa a22 4500 605455643 CHVBK 20210128100213.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10872-015-0274-8 doi (NATIONALLICENCE)springer-10.1007/s10872-015-0274-8 Spatiotemporal changes in meiofaunal composition on soft substrates in the semi-enclosed inner section of the northern Yatsushiro Sea [Elektronische Daten] [Motohiro Shimanaga, Akiyo Maenaka, Toshiharu Misonou, Tatsuya Masuda, Yasuhisa Henmi] The Yatsushiro Sea is an inland sea in the southwestern part of Kyushu Island, covering an area of 1,200km2, and is partly connected to the Ariake Sea to the north and the east China Sea to the south. The innermost part of the sea is semi-enclosed by the Shiranui reclaimed land, which was created in 1967. Coastal fishery operators in the region have suggested that fish stocks have declined due to the accumulation of ‘hedoro' (sludge) on the sea floor, which increased after the land was reclaimed. This project analyzed spatiotemporal changes in the community structure of the meiofauna, which represent ideal organisms for environment assays and in the environmental factors in sediments at four fixed stations around the inner part of the northern Yatsushiro Sea over 3years (May 2010-February 2013). The results confirm the site of local deposits in the narrow sub tidal section off the Shiranui reclaimed land, where rich organic matter has accumulated and highly sulfidic conditions above the standard criterion value for fisheries were present, along with clear and significant decreases in meiofaunal abundance during the summer. Multivariate analyses, however, did not reveal any strong association between the meiofaunal composition and any environmental factor in sediments, suggesting the organic and sulfidic conditions were not driving the temporal changes in meiofaunal structure in the area. Instead, the meiofaunal changes could be directly related to the low continuous decline in dissolved oxygen and salinity in the water on the sea floor in summer. The Oceanographic Society of Japan and Springer Japan, 2015 Yatsushiro Sea nationallicence Meiofauna nationallicence Environmental factors nationallicence Spatiotemporal change nationallicence Sulfide nationallicence Community structure nationallicence Shimanaga Motohiro Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut Maenaka Akiyo Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut Misonou Toshiharu Priority Organization for Innovation and Excellence, Kumamoto University, 860-8555, Kumamoto City, Kumamoto, Japan aut Masuda Tatsuya Priority Organization for Innovation and Excellence, Kumamoto University, 860-8555, Kumamoto City, Kumamoto, Japan aut Henmi Yasuhisa Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut Journal of Oceanography Springer Japan 71/2(2015-04-01), 177-186 0916-8370 71:2<177 2015 71 10872 https://doi.org/10.1007/s10872-015-0274-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10872-015-0274-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shimanaga Motohiro Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut NATIONALLICENCE 700 1- Maenaka Akiyo Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut NATIONALLICENCE 700 1- Misonou Toshiharu Priority Organization for Innovation and Excellence, Kumamoto University, 860-8555, Kumamoto City, Kumamoto, Japan aut NATIONALLICENCE 700 1- Masuda Tatsuya Priority Organization for Innovation and Excellence, Kumamoto University, 860-8555, Kumamoto City, Kumamoto, Japan aut NATIONALLICENCE 700 1- Henmi Yasuhisa Aitsu Marine Station, Center for Marine Environment Studies, Kumamoto University, Kami-Amakusa, 861-6102, Kumamoto, Japan aut NATIONALLICENCE 773 0- Journal of Oceanography Springer Japan 71/2(2015-04-01), 177-186 0916-8370 71:2<177 2015 71 10872