{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T10:50:55Z","timestamp":1769424655762,"version":"3.49.0"},"reference-count":53,"publisher":"Inter-Research Science Center","license":[{"start":{"date-parts":[[2020,8,27]],"date-time":"2020-08-27T00:00:00Z","timestamp":1598486400000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.int-res.com\/journals\/terms-of-use\/"}],"content-domain":{"domain":["int-res.com"],"crossmark-restriction":false},"short-container-title":["Mar. Ecol. Prog. Ser."],"published-print":{"date-parts":[[2020,8,27]]},"abstract":"<jats:p>The rhizophytic seaweed <jats:italic>Caulerpa prolifera<\/jats:italic> has been expanding rapidly in the Ria Formosa lagoon, southern Portugal, taking over deeper unvegetated areas and mixing with the native seagrass <jats:italic>Cymodocea nodosa<\/jats:italic> in shallower areas. In the Ria Formosa lagoon, belowground ammonium uptake from the sediment represents the main source of nitrogen for the 2 macrophytes, except during the ammonium pulses from the sediment to the water column that are incorporated through aboveground plant parts. We examined the competition for inorganic and organic nitrogen between <jats:italic>C. prolifera<\/jats:italic> and <jats:italic>C. nodosa<\/jats:italic> through a series of <jats:sup>15<\/jats:sup>N-ammonium and <jats:sup>15<\/jats:sup>N-amino acid surge uptake experiments combining single-species and mixed incubations at a range of nutrient concentrations. Our results showed that <jats:italic>C. prolifera<\/jats:italic> is generally faster than <jats:italic>C. nodosa<\/jats:italic> in the acquisition of ammonium and amino acids by both above- and belowground parts, and that the uptake rates of ammonium and amino acids of one species were not affected by the presence of the other species. The exception was the amino acid uptake through the rhizoids of <jats:italic>C. prolifera<\/jats:italic>, which was slightly enhanced in the presence of <jats:italic>C. nodosa<\/jats:italic>. In this situation, the aboveground ammonium uptake becomes the main contributor to the nitrogen budget of <jats:italic>C. nodosa<\/jats:italic> but not to that of <jats:italic>C. prolifera<\/jats:italic>. When ammonium pulses are considered, <jats:italic>C. nodosa<\/jats:italic> is more competitive for nitrogen than <jats:italic>C. prolifera<\/jats:italic>. In this case, the leaf uptake of ammonium is the largest contributor to the total nitrogen (ammonium plus amino acids) budget of the seagrass. Our results showed that the different nutritional strategies of the 2 macrophytes allow their coexistence in the Ria Formosa lagoon.<\/jats:p>","DOI":"10.3354\/meps13429","type":"journal-article","created":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T12:03:26Z","timestamp":1595246606000},"page":"125-134","update-policy":"https:\/\/doi.org\/10.3354\/policy","source":"Crossref","is-referenced-by-count":13,"title":["Competition for nitrogen between the seaweed Caulerpa prolifera and the seagrass Cymodocea nodosa"],"prefix":"10.3354","volume":"648","author":[{"given":"A","family":"Alexandre","sequence":"first","affiliation":[{"name":"Marine Plant Ecology Research Group, CCMAR, Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal"}]},{"given":"R","family":"Santos","sequence":"additional","affiliation":[{"name":"Marine Plant Ecology Research Group, CCMAR, Centre of Marine Sciences, University of Algarve, Gambelas, 8005-139 Faro, Portugal"}]}],"member":"1913","reference":[{"key":"Ref1","unstructured":"Abr\u00e0moff MD, Magalh\u00e3es PJ, Ram SJ (2004) Image processing with Image J. Biophoton Int 11:36-42"},{"key":"Ref2","doi-asserted-by":"publisher","DOI":"10.1111\/jpy.12988"},{"key":"Ref3","doi-asserted-by":"publisher","DOI":"10.1016\/j.marenvres.2020.104954"},{"key":"Ref4","doi-asserted-by":"publisher","DOI":"10.1111\/j.1439-0485.2010.00378.x"},{"key":"Ref5","doi-asserted-by":"publisher","DOI":"10.1016\/j.jembe.2011.03.008"},{"key":"Ref6","doi-asserted-by":"publisher","DOI":"10.1111\/maec.12351"},{"key":"Ref7","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-017-13962-4"},{"key":"Ref8","doi-asserted-by":"publisher","DOI":"10.1023\/A:1026542621512"},{"key":"Ref9","doi-asserted-by":"crossref","unstructured":"Belando M, Bernardeau-Esteller J, Paradinas I, Ramos-Segura A and others (2019) Assessment of long-term interaction between an opportunistic macroalga and a native seagrass in a Mediterranean coastal lagoon. Front Mar Sci Conf Abstract, XX Iberian Symposium on Marine Biology Studies (SIEBM XX)","DOI":"10.3389\/conf.fmars.2019.08.00190"},{"key":"Ref10","doi-asserted-by":"publisher","DOI":"10.1515\/BOT.2010.034"},{"key":"Ref11","doi-asserted-by":"publisher","DOI":"10.1016\/j.ecss.2007.11.005"},{"key":"Ref12","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-0981(97)00050-6"},{"key":"Ref13","doi-asserted-by":"publisher","DOI":"10.3354\/meps163289"},{"key":"Ref14","doi-asserted-by":"publisher","DOI":"10.1515\/BOT.1999.047"},{"key":"Ref15","doi-asserted-by":"publisher","DOI":"10.1023\/A:1016514621586"},{"key":"Ref16","doi-asserted-by":"publisher","DOI":"10.1515\/BOT.2002.013"},{"key":"Ref17","unstructured":"Cunha AH, Varela-\u00c1lvarez E, Paulo DS, Sousa I, Serr\u00e3o EA (2013) The rediscovery of Caulerpa prolifera in Ria Formosa, Portugal, 60 years after the previous record. Cah Biol Mar 54:359-364"},{"key":"Ref18","doi-asserted-by":"publisher","DOI":"10.1515\/botm.1995.38.1-6.79"},{"key":"Ref19","doi-asserted-by":"publisher","DOI":"10.1023\/A:1017938225559"},{"key":"Ref20","doi-asserted-by":"publisher","DOI":"10.1016\/j.phytochem.2004.09.003"},{"key":"Ref21","doi-asserted-by":"publisher","DOI":"10.1007\/BF00041450"},{"key":"Ref22","doi-asserted-by":"publisher","DOI":"10.1007\/BF02084221"},{"key":"Ref23","unstructured":"Fowler J, Cohen L (1990) Practical statistics for field biology. Open University Press, Chichester"},{"key":"Ref24","doi-asserted-by":"publisher","DOI":"10.1016\/0022-0981(85)90100-5"},{"key":"Ref25","doi-asserted-by":"publisher","DOI":"10.1016\/j.marenvres.2012.05.001"},{"key":"Ref26","doi-asserted-by":"publisher","DOI":"10.1016\/0304-4203(79)90033-1"},{"key":"Ref27","doi-asserted-by":"crossref","unstructured":"Hurd CL, Harrison PJ, Bischof K, Lobban CS (2014) Seaweed ecology and physiology. Cambridge University Press, Cambridge","DOI":"10.1017\/CBO9781139192637"},{"key":"Ref28","doi-asserted-by":"crossref","unstructured":"Jones DL, Owen AG, Farrar JF (2002) Simple method to enable the high resolution determination of total free amino acids in soil solutions and soil extracts. Soil Biol Biochem 34:1893-1902","DOI":"10.1016\/S0038-0717(02)00203-1"},{"key":"Ref29","doi-asserted-by":"publisher","DOI":"10.1016\/j.ocecoaman.2005.07.002"},{"key":"Ref30","doi-asserted-by":"publisher","DOI":"10.3354\/meps298101"},{"key":"Ref31","doi-asserted-by":"publisher","DOI":"10.3354\/meps08184"},{"key":"Ref32","doi-asserted-by":"publisher","DOI":"10.3354\/meps236089"},{"key":"Ref33","unstructured":"Parsons T, Maita Y, Lalli C (1984) A manual of chemical and biological methods for seawater analysis. Pergamon Press, Oxford"},{"key":"Ref34","doi-asserted-by":"publisher","DOI":"10.1111\/j.0022-3646.1994.00980.x"},{"key":"Ref35","doi-asserted-by":"publisher","DOI":"10.1007\/BF00033498"},{"key":"Ref36","unstructured":"P\u00e9rez-Ruzafa A, Marcos C, P\u00e9rez-Ruzafa IM, Ros JD (1987) Evoluci\u00f3n de las caracter\u00edsticas ambientales y de los poblamientos del Mar Menor (Murcia, SE de Espa\u00f1a). An Biol 12:53-65"},{"key":"Ref37","doi-asserted-by":"publisher","DOI":"10.1016\/j.ecss.2012.04.004"},{"key":"Ref38","doi-asserted-by":"publisher","DOI":"10.4319\/lo.1998.43.5.0823"},{"key":"Ref39","doi-asserted-by":"publisher","DOI":"10.1016\/0304-3770(84)90008-1"},{"key":"Ref40","doi-asserted-by":"publisher","DOI":"10.1515\/botm.1984.27.12.547"},{"key":"Ref41","doi-asserted-by":"publisher","DOI":"10.2307\/1352588"},{"key":"Ref42","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0081058"},{"key":"Ref43","doi-asserted-by":"publisher","DOI":"10.1016\/j.jembe.2005.11.025"},{"key":"Ref44","doi-asserted-by":"crossref","unstructured":"Stapel J, Aarts TL, Duynhoven BHM, van Groot JD, de Hoogen PHW, Hemminga MA (1996) Nutrient uptake by leaves and roots of the seagrass Thalassia hemprichii in the Spermonde Archipelago, Indonesia. Mar Ecol Prog Ser 134:195-206","DOI":"10.3354\/meps134195"},{"key":"Ref45","doi-asserted-by":"crossref","unstructured":"Terrados J, Williams SL (1997) Leaf versus root nitrogen uptake by the surfgrass Phyllospadix torreyi. Mar Ecol Prog Ser 149:267-277","DOI":"10.3354\/meps149267"},{"key":"Ref46","doi-asserted-by":"publisher","DOI":"10.3354\/meps158103"},{"key":"Ref47","doi-asserted-by":"crossref","unstructured":"Thursby GB, Harlin MM (1982) Leaf-root interaction in the uptake of ammonia by Zostera marina. Mar Biol 72:109-112","DOI":"10.1007\/BF00396910"},{"key":"Ref48","doi-asserted-by":"crossref","unstructured":"Thursby GB, Harlin MM (1984) Interaction of leaves and roots of Ruppia maritima in the uptake of phosphate, ammonia and nitrate. Mar Biol 83:61-67","DOI":"10.1007\/BF00393086"},{"key":"Ref49","doi-asserted-by":"publisher","DOI":"10.1016\/j.aquabot.2012.10.006"},{"key":"Ref50","doi-asserted-by":"publisher","DOI":"10.3354\/meps10448"},{"key":"Ref51","doi-asserted-by":"publisher","DOI":"10.3989\/scimar.04391.07A"},{"key":"Ref52","doi-asserted-by":"publisher","DOI":"10.3354\/meps169001"},{"key":"Ref53","doi-asserted-by":"crossref","unstructured":"Weatherburn MW (1967) Phenol-hypochlorite reaction for determination of ammonia. Anal Chem 39:971-974","DOI":"10.1021\/ac60252a045"}],"container-title":["Marine Ecology Progress Series"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.int-res.com\/articles\/meps2020\/648\/m648p125.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.int-res.com\/articles\/meps2020\/648\/m648p125.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,8,27]],"date-time":"2020-08-27T11:38:03Z","timestamp":1598528283000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.int-res.com\/abstracts\/meps\/v648\/p125-134\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,8,27]]},"references-count":53,"URL":"https:\/\/doi.org\/10.3354\/meps13429","relation":{},"ISSN":["0171-8630","1616-1599"],"issn-type":[{"value":"0171-8630","type":"print"},{"value":"1616-1599","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,8,27]]}}}