{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,28]],"date-time":"2026-01-28T05:08:10Z","timestamp":1769576890281,"version":"3.49.0"},"reference-count":31,"publisher":"Oxford University Press (OUP)","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2008,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Salas, F., Teixeira, H., Marcos, C., Marques, J. C., and P\u00e9rez-Ruzafa, A. 2008. Applicability of the trophic index TRIX in two transitional ecosystems: the Mar Menor lagoon (Spain) and the Mondego estuary (Portugal). \u2013 ICES Journal of Marine Science, 65: 1442\u20131448. Ecological indicators are commonly used to provide synoptic information about the state of ecosystems. Their main attribute is that they combine a range of environmental factors in a single value, which is thought useful for management and for making ecological-quality concepts easily understandable by the general public. In some European countries, the trophic state of marine and coastal waters is characterized using the trophic index TRIX. We used TRIX in the studies of the Mar Menor coastal lagoon (southeast Spain) and the Mondego estuary (northwest Portugal). These areas are under environmental stress, and eutrophication processes have been monitored in recent years. The results demonstrate the inefficacy of TRIX as a trustworthy tool to classify eutrophication status in estuarine waters. The causes of the malfunction of the index are discussed, and we suggest that, if the index is to be applied over wide areas, the classification criteria will have to be adapted to specific environments.<\/jats:p>","DOI":"10.1093\/icesjms\/fsn123","type":"journal-article","created":{"date-parts":[[2008,8,2]],"date-time":"2008-08-02T00:36:12Z","timestamp":1217637372000},"page":"1442-1448","source":"Crossref","is-referenced-by-count":35,"title":["Applicability of the trophic index TRIX in two transitional ecosystems: the Mar Menor lagoon (Spain) and the Mondego estuary (Portugal)"],"prefix":"10.1093","volume":"65","author":[{"given":"Fuensanta","family":"Salas","sequence":"first","affiliation":[{"name":"Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain"}]},{"given":"Heliana","family":"Teixeira","sequence":"additional","affiliation":[{"name":"IMAR, Institute of Marine Research, c\/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal"}]},{"given":"Concepci\u00f3n","family":"Marcos","sequence":"additional","affiliation":[{"name":"Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain"}]},{"given":"Jo\u00e3o Carlos","family":"Marques","sequence":"additional","affiliation":[{"name":"IMAR, Institute of Marine Research, c\/o Department of Zoology, Faculty of Sciences and Technology, University of Coimbra, 3004-517 Coimbra, Portugal"}]},{"given":"Angel","family":"P\u00e9rez-Ruzafa","sequence":"additional","affiliation":[{"name":"Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain"}]}],"member":"286","published-online":{"date-parts":[[2008,8,1]]},"reference":[{"key":"2019081211260300800_FSN123C1","article-title":"Standard Methods for the Examination of Water and Wastewater","author":"APHA.","year":"1995"},{"key":"2019081211260300800_FSN123C2","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/j.marpolbul.2006.08.037","article-title":"Dissolved oxygen as a physico-chemical supporting element in the Water Framework Directive","volume":"55","author":"Best","year":"2007","journal-title":"Marine Pollution Bulletin"},{"key":"2019081211260300800_FSN123C3","doi-asserted-by":"crossref","first-page":"218","DOI":"10.1016\/j.ecss.2006.07.017","article-title":"Trophic state of Foz de Almargem coastal lagoon (Algarve, South Portugal) based on the water quality and the phytoplankton community","volume":"71","author":"Coelho","year":"2007","journal-title":"Estuarine, Coastal and Shelf Science"},{"key":"2019081211260300800_FSN123C4","first-page":"82","article-title":"Nutrients in European ecosystems","volume-title":"Environmental Assessment Report, 4.","author":"Crouzet","year":"1999"},{"key":"2019081211260300800_FSN123C5","doi-asserted-by":"crossref","first-page":"91","DOI":"10.1016\/j.marpolbul.2006.09.018","article-title":"Establishing boundary classes for the classification of UK marine waters using phytoplankton communities","volume":"55","author":"Devlin","year":"2007","journal-title":"Marine Pollution Bulletin"},{"key":"2019081211260300800_FSN123C6","doi-asserted-by":"crossref","first-page":"576","DOI":"10.1016\/j.marpolbul.2006.12.005","article-title":"Anthropogenic and natural disturbance effects on a macrobenthic estuarine community over a 10-year period","volume":"54","author":"Dolbeth","year":"2007","journal-title":"Marine Pollution Bulletin"},{"key":"2019081211260300800_FSN123C7","article-title":"Urban Wastewater Treatment Directive 91\/271\/EEC","volume":"a","author":"EC.","year":"1991","journal-title":"Official Journal of the European Communities"},{"key":"2019081211260300800_FSN123C8","article-title":"Nitrate Directive 91\/686\/EEC","volume":"b","author":"EC.","year":"1991","journal-title":"Official Journal of the European Communities"},{"key":"2019081211260300800_FSN123C9","article-title":"Water Framework Directive 2000\/60\/EC","author":"EC.","year":"2000","journal-title":"Official Journal of the European Communities"},{"key":"2019081211260300800_FSN123C10","first-page":"155","article-title":"Nutrients in European Ecosystems. 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