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- Walve, JakobStockholms universitet,Institutionen för ekologi, miljö och botanik,Department of Ecology, Environment and Plant Sciences, Stockholm University (author)
Trace metals and nutrients in Baltic Sea cyanobacteria : Internal and external fractions and potential use in nitrogen fixation
- Article/chapterEnglish2014
Publisher, publication year, extent ...
- Elsevier,2014
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:su-101748
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-101748URI
- https://doi.org/10.1016/j.marchem.2013.11.002DOI
- https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-4504URI
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- Language:English
- Summary in:English
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- AuthorCount:3;Other funders:Kempe Foundation; Umea and Stockholm University Marine Research Centers (UMF and SMF); Stockholm University; Department of Systems Ecology, Stockholm University (Ulf Larsson)
- Validerad; 2014; 20131119 (andbra)
- Even though the availability of trace metals influences nitrogen fixation and growth of cyanobacteria, field data on their cellular metal composition are scarce. In this study, contents of Al, Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Mo, Cd, and the major elements C, N, P and Si were studied in filamentous, nitrogen-fixing cyanobacteria sampled over the growth season March-October at two locations in the Baltic proper (years 2004 and 2007) and one location in the Bothnian Sea (2006). The Al and Ti contents indicated that lithogenic Fe was an important Fe fraction associated with Nodularia spumigena, but not with Aphanizomenon sp. Treatment with an oxalate-EDTA solution indicated that less than 5% of total Fe was adsorbed as oxides, but relatively high adsorbed fractions were found for Mn and Cu. Despite the large variation in biomass and dissolved Fe concentrations, the Fe:C ratio of Aphanizomenon was highly consistent within years and across sampling stations (76 +/- 13 mu mol mol(-1) C. average +/- 1SD), indicating growth controls other than Fe. Species-mixed samples corrected for lithogenic metals indicate similar Fe content in Nodularia as in Aphanizomenon. Calculations based on the use efficiency of Mo for N-2 fixation indicate that most Mo in Nodularia and at least a third of the Mo in Aphanizomenon are used in nitrogenase, corresponding to 5-24% of the Fe content. The high Ni content suggests excess storage or extensive use in enzymes such as Ni superoxide dismutase or in Fe-dependent Ni-hydrogenases. The trace metal composition of the investigated Baltic cyanobacteria was similar to that reported for the oceanic genus Trichodesmium, suggesting common physiological requirements of these filamentous nitrogen-fixing cyanobacteria.
Subject headings and genre
- NATURVETENSKAP Geovetenskap och miljövetenskap Oceanografi, hydrologi och vattenresurser hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Oceanography, Hydrology and Water Resources hsv//eng
- NATURVETENSKAP Kemi hsv//swe
- NATURAL SCIENCES Chemical Sciences hsv//eng
- NATURVETENSKAP Geovetenskap och miljövetenskap Geokemi hsv//swe
- NATURAL SCIENCES Earth and Related Environmental Sciences Geochemistry hsv//eng
- Adsorption
- Aluminum
- Cyanobacteria
- Baltic Sea
- Iron
- Molybdenum
- Nitrogen fixation
- Stoichiometry
- Trace metals
- Applied Geology
Added entries (persons, corporate bodies, meetings, titles ...)
- Gelting, JohanLuleå tekniska universitet,Stockholms universitet,Institutionen för ekologi, miljö och botanik,Geovetenskap och miljöteknik(Swepub:ltu)jgn (author)
- Ingri, JohanLuleå tekniska universitet,Geovetenskap och miljöteknik(Swepub:ltu)join (author)
- Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)
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- In:Marine Chemistry: Elsevier158, s. 27-380304-42031872-7581
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