{"refrec":{"BRefID":27740,"RR":"<b>Lyngby, J.E.; Mortensen, S.M.</b> (1996). Effects of dredging activities on growth of <i>Laminaria saccharina</i>, <b><i>in</i></b>: Dworschak, P.C. <i>et al.</i> (1996). <i>Influences of organisms on their Environment, the role of episodic events: Proceedings of the 29th European Marine Biology Symposium Vienna, 29 August-2 September 1994. Marine Ecology (Berlin),</i> 17(1-3): pp. 345-354","BEntID":27740,"PublicFlag":1,"CheckedFlag":0,"wosflag":0,"vabbflag":0,"RefStringPartII":", <b><i>in</i></b>: Dworschak, P.C. <i>et al.</i> <i>Influences of organisms on their environment, the role of episodic events: Proceedings of the 29th European Marine Biology Symposium Vienna, 29 August-2 September 1994. European Marine Biology Symposia,</i> 29: pp. 345-354. <a href=\"https://dx.doi.org/10.1111/j.1439-0485.1996.tb00513.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1439-0485.1996.tb00513.x</a>","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lyngby, J.E.; Mortensen, S.M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lyngby, J.E.; Mortensen, S.M.","Englishabstract":"The possible effects of fine-grained deposits on the photosynthesis, growth, and nutrient uptake of <i>Laminaria</i> have been studied in field and laboratory experiments. Some of the plants were treated with fine-grained material for two hours and then transplanted in rows together with untreated plants. At two-week intervals the treatment was repeated and samples collected. The macroalgae were analyzed for growth as well as chlorophyll <i>a</i>, nitrogen, and phosphorus content. In the laboratory experiments, plants of a uniform size were incubated in Plexiglas containers after leaf-marking and treatment in a sediment suspension. At weekly intervals, photosynthesis, growth, chlorophyll <i>a</i>, and nutrients were analyzed.</p>         <p>The field study showed that <i>Laminaria</i> growth was significantly affected by the fine-grained material. The growth in the control experiment was 20% higher than in the treated plants. The chlorophyll <i>a</i> concentrations in the treated plants were significantly lower than in the control experiment, and the results indicated a reduced nutrient uptake in the treated plants. In the laboratory experiments the growth of the treated plants was only 30% of the controls, but no differences in photosynthetic capacities were detected. Nitrogen uptake was reduced in the treated plants, but no effects were observed on phosphorus uptake. Thick layers of fine-grained material caused direct harmful effects and rotting.</p>         <p>The results are discussed in relation to dredging activities; it is concluded that in heavy sedimentation areas, <i>Laminaria</i> growth may be significantly reduced beyond the indirect effect of shading from suspended material in the water.</p>","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"Effects of dredging activities on growth of <i>Laminaria saccharina</i>","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1996,"MonPub":null,"DateUpdate":"2023-02-08","DateCreate":"2002-09-30","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":"WOS:A1996VL82400029","VABBcode":null,"OpenAcc":0,"DOI":"10.1111/j.1439-0485.1996.tb00513.x"},"refs":null,"anarec":{"AnaID":27740,"PubliDate":1996,"Pagination":"345-354","XtraPublOfAnaID":null,"ISBN":null,"Volume":"29","Issue":null,"BRefMon":24869,"BRefMonRR":"<b>Dworschak, P.C.; Stachowitsch, M.; Ott, J.A. (Ed.)</b> (1996). Influences of organisms on their environment, the role of episodic events: Proceedings of the 29th European Marine Biology Symposium Vienna, 29 August-2 September 1994. <i>European Marine Biology Symposia</i>, 29. <i>Marine Ecology (Berlin)</i>, 17(1-3). 568 pp.","BRefXtra":null,"BRefXtraRR":null,"SerBRefID":20275,"SerRR":"European Marine Biology Symposia.","StandardTitleSer":"European Marine Biology Symposia","ISSN":null,"AbbrevSer":null,"StandardTitleMon":"Influences of organisms on their environment, the role of episodic events: Proceedings of the 29th European Marine Biology Symposium Vienna, 29 August-2 September 1994","StartPage":345,"Pages":10,"ToPubliDate":null,"BRefBibLvlCode":"MS","SerNotes":null,"AutString":"Dworschak, P.C.; Stachowitsch, M.; Ott, J.A. 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