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CHARACTERIZATION OF NITROGEN AND CARBON STABLE ISOTOPES IN EPIPHYTIC FORAMINIFERAL MORPHOTYPES

2016; Cushman Foundation for Foraminiferal Research; Volume: 46; Issue: 3 Linguagem: Inglês

10.2113/gsjfr.46.3.271

1943-264X

Guillem Mateu‐Vicens, Teresa Sebastián, Anna Khokhlova, Maria del Mar Leza, Salud Deudero,

Marine Biology and Ecology Research

Research Article| July 01, 2016 CHARACTERIZATION OF NITROGEN AND CARBON STABLE ISOTOPES IN EPIPHYTIC FORAMINIFERAL MORPHOTYPES Guillem Mateu-Vicens; Guillem Mateu-Vicens 5 1Laboratori de Zoologia, Departament de Biologia, Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain2Cátedra "Guillem Colom Casasnovas," Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain3Museu Balear de Ciències Naturals, Cra. Palma-Port de Sóller, Km. 30, Sóller (Mallorca), Spain 5Correspondence author: E-mail: guillem.mateu@uib.es Search for other works by this author on: GSW Google Scholar Teresa Sebastián; Teresa Sebastián 3Museu Balear de Ciències Naturals, Cra. Palma-Port de Sóller, Km. 30, Sóller (Mallorca), Spain Search for other works by this author on: GSW Google Scholar Anna Khokhlova; Anna Khokhlova 2Cátedra "Guillem Colom Casasnovas," Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain Search for other works by this author on: GSW Google Scholar Maria del Mar Leza; Maria del Mar Leza 1Laboratori de Zoologia, Departament de Biologia, Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain Search for other works by this author on: GSW Google Scholar Salud Deudero Salud Deudero 4Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears, Moll de Ponent s/n, 07015 Palma de Mallorca, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Guillem Mateu-Vicens 5 1Laboratori de Zoologia, Departament de Biologia, Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain2Cátedra "Guillem Colom Casasnovas," Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain3Museu Balear de Ciències Naturals, Cra. Palma-Port de Sóller, Km. 30, Sóller (Mallorca), Spain Teresa Sebastián 3Museu Balear de Ciències Naturals, Cra. Palma-Port de Sóller, Km. 30, Sóller (Mallorca), Spain Anna Khokhlova 2Cátedra "Guillem Colom Casasnovas," Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain Maria del Mar Leza 1Laboratori de Zoologia, Departament de Biologia, Universitat de les Illes Balears, Cra. de Valldemossa, Km. 7.5, 07122 Palma de Mallorca, Spain Salud Deudero 4Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears, Moll de Ponent s/n, 07015 Palma de Mallorca, Spain 5Correspondence author: E-mail: guillem.mateu@uib.es Publisher: Cushman Foundation for Foraminiferal Research Received: 06 Aug 2015 Accepted: 22 Oct 2015 First Online: 13 Jul 2017 Online Issn: 1943-264X Print Issn: 0096-1191 © 2016 Cushman Foundation for Foraminiferal Research Journal of Foraminiferal Research (2016) 46 (3): 271–284. https://doi.org/10.2113/gsjfr.46.3.271 Article history Received: 06 Aug 2015 Accepted: 22 Oct 2015 First Online: 13 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Guillem Mateu-Vicens, Teresa Sebastián, Anna Khokhlova, Maria del Mar Leza, Salud Deudero; CHARACTERIZATION OF NITROGEN AND CARBON STABLE ISOTOPES IN EPIPHYTIC FORAMINIFERAL MORPHOTYPES. Journal of Foraminiferal Research 2016;; 46 (3): 271–284. doi: https://doi.org/10.2113/gsjfr.46.3.271 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Epiphytic foraminifera are important components of the seagrass-meadow biota. These foraminifera previously were categorized, based upon their ecological and feeding strategies, into four morphotypes that were subsequently modified to include a new morphotype for the symbiont-bearing foraminifera. We propose further modifications to increase the ecological resolution. Thus, the A* morphotype splits into leaf-encrusting forms (AF*) and rhizome encrusting taxa (AR*). Similarly, the symbiont-bearing morphotype has been separated into Large Miliolids (LM) that host a variety of algal symbionts, and Large Rotalids (LR) that exclusively host diatoms. B and C morphotypes remain as they were originally defined, whilst D* morphotype does not include symbiont-bearing taxa and represents opportunistic forms. To determine the trophic strategy of the epiphytic morphotypes, the cytoplasmic nitrogen and carbon stable-isotope signals from two localities of Mallorca (Sa Foradada and Sant Elm) and one from Madagascar were analysed. The most abundant morphotype reported in Mallorca localities was B (38% ± 4.3 in Sa Foradada and 45% ± 4.2 in Sant Elm), followed by AF* (34% ± 4.6 in Sa Foradada and 41% ± 1.0 in Sant Elm). In Madagascar, the most abundant morphotype is D* (45% ± 10), and symbiont-bearing morphotypes (LM and LR) were considerably more abundant than at the Mediterranean locations. Among all samples, the δ15N values ranged between 0.5 and 3‰; δ13C values varied between −18 and −0.9‰. An MDS statistical analysis showed that variability in the δ15N and δ13C isotopes is associated with differences among the morphotypes and likely reflects their feeding strategies. A SIMPER analysis of the isotopic composition revealed minimal differences within the sessile (AF* and AR*) and within the symbiont-bearing (LM and LR) morphotypes, indicating similar trophic strategies within each pair, largely based upon cyanobacteria as a food source. These foraminifera perform "farming" of (cyano)bacteria, fungi and diatoms, which constitute the essential components of their diet. The LM-LR morphotypes also receive organic carbon from their algal symbionts. The δ15N and δ13C values of the motile B and D* morphotypes are highly variable, indicative of diverse food sources, including cyanobacteria, fungi, microalgae and particulate organic matter (phytodetritus). The δ15N in the C morphotype are more enriched and δ13C more depleted (3‰ and −10‰, respectively) than in the sessile morphotypes. Consistent with observations of other epiphytic, sessile organisms, cyanobacteria seem to be a very important food source. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.