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Copepod nauplii use phosphorus from bacteria, creating a short circuit in the microbial loop
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för ekologi, miljö och geovetenskap. Department of Oceanography University of Hawaii at Manoa Honolulu, Hawaii.ORCID-id: 0000-0003-4738-9714
2019 (engelsk)Inngår i: Ecology Letters, ISSN 1461-023X, E-ISSN 1461-0248, Vol. 22, nr 9, s. 1462-1471Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In subtropical oceans phytoplankton carbon: phosphorus (C : P) ratios are high, and these ratios are predicted to increase further with rising ocean temperatures and stratification. Prey stoichiometry may pose a problem for copepod zooplankton nauplii, which have high phosphorus demands due to rapid growth. We hypothesised that nauplii meet this demand by consuming bacteria. Naupliar bacterial and phytoplankton carbon and phosphorus ingestion, assimilation and incorporation were traced using P-33 and C-14 radioisotopes. Bacterial carbon was incorporated four times less efficiently into biomass than phytoplankton carbon. In contrast, bacterial and phytoplankton phosphorus were incorporated at similar efficiencies, and bacteria could meet a substantial amount of naupliar phosphorus requirements. As parts of the ocean become more oligotrophic, bacteria could help sustain naupliar growth and survival under suboptimal stoichiometric conditions. Thus, nauplii may be a shortcut for phosphorus from the microbial loop to the classical food web.

sted, utgiver, år, opplag, sider
John Wiley & Sons, 2019. Vol. 22, nr 9, s. 1462-1471
Emneord [en]
Carbon, ecological stoichiometry, food quality, marine, phytoplankton, subtropics
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-162336DOI: 10.1111/ele.13332ISI: 000478617300001PubMedID: 31270952OAI: oai:DiVA.org:umu-162336DiVA, id: diva2:1343296
Tilgjengelig fra: 2019-08-16 Laget: 2019-08-16 Sist oppdatert: 2019-10-10bibliografisk kontrollert

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