Contrasting plankton stoichiometry and nutrient regeneration in northern arctic and boreal lakes

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Bergström, Ann-KristinUmeå universitet,Institutionen för ekologi, miljö och geovetenskap,Arcum (author)

Contrasting plankton stoichiometry and nutrient regeneration in northern arctic and boreal lakes

Article/chapterEnglish2018

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2018-03-29
Springer,2018
electronicrdacarrier

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LIBRIS-ID:oai:DiVA.org:umu-147316
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-147316URI
https://doi.org/10.1007/s00027-018-0575-2DOI
https://res.slu.se/id/publ/95002URI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

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Contrasting carbon: nitrogen: phosphorus (C: N: P) stoichiometry between phytoplankton and zooplankton affect consumer growth and phytoplankton nutrient limitation via nutrient recycling by zooplankton. However, no study has assessed how regional differences in terrestrial loadings of organic matter affect plankton N: P stoichiometry and recycling in systems with low N deposition and N-limited phytoplankton. We address this question by using data from 14 unproductive headwater arctic and boreal lakes. We found that boreal lakes had higher lake water-and seston C, N and P concentrations than arctic lakes, whereas seston C: N, C: P and N: P ratios did not differ among regions. Boreal zooplankton were also richer in N and P relative to C, with lower somatic N: P ratios, compared to arctic lakes. Consequently, the estimated N: P imbalances between seston and zooplankton were negative in arctic lakes, indicating zooplankton feeding on phytoplankton of suboptimal N content, resulting in low consumer driven N: P recycling (medians arctic sub-mid and high altitude lakes: 11 and 13). In boreal lakes, estimated N: P imbalance did not differ from zero, with a seston N: P stoichiometry matching the N: P requirements of zooplankton, which resulted in higher consumer driven N: P recycling (median 18). Our results imply that regional climate induced catchment differences, through enhanced terrestrial nutrient inputs, affect plankton stoichiometry by raising consumer N: P recycling ratio and changing zooplankton from being mainly N-(arctic) to NP co-limited (boreal). Browning of lakes, in regions with low N deposition, may therefore promote large-scale regional changes in plankton nutrient limitation with potential feedbacks on pelagic food webs.

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 Geovetenskap och miljövetenskap Miljövetenskap hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Environmental Sciences hsv//eng
NATURVETENSKAP Biologi Ekologi hsv//swe
NATURAL SCIENCES Biological Sciences Ecology hsv//eng
Carbon
Nitrogen
Nutrient limitation
Phosphorus
Phytoplankton
Zooplankton

Added entries (persons, corporate bodies, meetings, titles ...)

Karlsson, JanUmeå universitet,Institutionen för ekologi, miljö och geovetenskap,Climate Impacts Research Centre (CIRC) ; Arcum(Swepub:umu)jaka0003 (author)
Karlsson, DanielUmeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)kandal02 (author)
Vrede, TobiasSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för vatten och miljö,Department of Aquatic Sciences and Assessment(Swepub:slu)48902 (author)
Umeå universitetInstitutionen för ekologi, miljö och geovetenskap (creator_code:org_t)
Sveriges lantbruksuniversitet

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In:Aquatic Sciences: Springer80:21015-16211420-9055

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By the author/editor: Bergström, Ann-K ...; Karlsson, Jan; Karlsson, Daniel; Vrede, Tobias

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Oceanography Hyd ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Environmental Sc ...

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