{"refrec":{"BRefID":437957,"RR":"<b>Kim, G.; Lim, K.H.; Lee, J.H.; Park, S.W.; Shin, H.C.</b> (2026). Long-term variability and ecological structure of macrobenthic polychaete communities in Korean coastal waters: A 30-year (1993–2022) data-based assessment. <i>Ocean Science Journal 61(1)</i>: 19. <a href=\"https://dx.doi.org/10.1007/s12601-026-00270-0\" target=\"_blank\">https://dx.doi.org/10.1007/s12601-026-00270-0</a>","BEntID":435788,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Ocean Science Journal 61(1)</i>: 19. <a href=\"https://dx.doi.org/10.1007/s12601-026-00270-0\" target=\"_blank\">https://dx.doi.org/10.1007/s12601-026-00270-0</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kim, G.; Lim, K.H.; Lee, J.H.; Park, S.W.; Shin, H.C.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kim, G. <i>et al.</i>","Englishabstract":"This study integrated macrobenthic polychaete data collected from 7773 stations along the Korean coast over a 30-year period (1993–2022) to investigate spatiotemporal patterns in community structure and the occurrence characteristics of potential organic pollution indicator species. A total of 354 species were identified, with a mean species richness of 15 ± 12 spp./0.02&nbsp;m<sup>2</sup> per station and a mean density of 646 ± 1265 ind./m<sup>2</sup>. Species richness was highest in the South Sea, while population density was greatest in the East Sea. <i>Scoletoma longifolia</i>, <i>Heteromastus filiformis</i>, and <i>Aphelochaeta monilaris</i> were consistently dominant across all regions, collectively accounting for approximately 30% of the total population density. Decadal analyses revealed overall increasing trends in species richness, density, and most ecological indices, indicating a long-term recovery of diversity and structural stability in Korean coastal polychaete communities. Cluster analysis and non-metric multidimensional scaling (nMDS) identified five distinct community groups and further delineated eight regional ecological units, including tidal flats of the West Sea; northern and southern West Sea; inner and outer South Sea; northern and southern East Sea; and the South Sea continental shelf, each exhibiting clear differences in dominant species composition and ecological characteristics. Based on AMBI, BPI, and BHI classifications, 72 polychaete species were identified as potential organic pollution indicator species, representing 20.3% of the total species richness and 45.9% of the total population density. Although the relative contribution of these indicator species declined over time, total species richness and density increased, suggesting a long-term improvement in benthic environmental quality. This study provides the most comprehensive long-term and large-scale quantitative assessment of macrobenthic polychaete community structure along the Korean coast and offers essential baseline data for future coastal ecosystem health assessments and habitat-specific management and monitoring strategies.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Long-term variability and ecological structure of macrobenthic polychaete communities in Korean coastal waters: A 30-year (1993–2022) data-based assessment","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-03-12 01:34:17.863026","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Coast of Korea; Long-term variation; Macrobenthic polychaete community; Open coast/Semi-enclosed bay; Potential organic pollution indicator species; West Sea/South Sea/East Sea","OtherDescriptors":null,"Notes":null,"AnaPub":2026,"MonPub":null,"DateUpdate":"2026-03-05","DateCreate":"2026-03-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s12601-026-00270-0"},"refs":null,"anarec":{"AnaID":437957,"PubliDate":2026,"Pagination":"19","XtraPublOfAnaID":null,"ISBN":null,"Volume":"61","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":72541,"SerRR":"Ocean Science Journal. 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