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Relationship between light, community composition and the electron requirement for carbon fixation in natural phytoplankton

2017; Inter-Research; Volume: 580; Linguagem: Inglês

10.3354/meps12310

1616-1599

Yaomin Zhu, Joji Ishizaka, S.C. Tripathy, Shaopeng Wang, Chiho Sukigara, J. I. Goes, Takeshi Matsuno, DJ Suggett,

Ocean Acidification Effects and Responses

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 580:83-100 (2017) - DOI: https://doi.org/10.3354/meps12310 Relationship between light, community composition and the electron requirement for carbon fixation in natural phytoplankton Yuanli Zhu1,*, Joji Ishizaka1, Sarat Chandra Tripathy2, Shengqiang Wang3, Chiho Sukigara4, Joaquim Goes5, Takeshi Matsuno6, David J. Suggett7 1Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan 2ESSO-National Centre for Antarctic and Ocean Research, Ministry of Earth Sciences, Vasco-da-Gama, Goa 403804, India 3School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, Jiangsu, PR China 4Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan 5Lamont-Doherty Earth Observatory at Columbia University, Palisades, New York 10964, USA 6Research Institute for Applied Mechanics, Kyushu University, Fukuoka 812-8581, Japan 7Climate Change Cluster, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia *Corresponding author: zyl19840218@gmail.com ABSTRACT: Fast repetition rate fluorometry (FRRF) provides a means to examine primary productivity at high resolution across broad scales, but must be coupled with independent knowledge of the electron requirement for carbon uptake (KC) to convert FRRF-measured electron transfer rate (ETR) to an inorganic carbon (C) uptake rate. Previous studies have demonstrated that variability of KC can be explained by key environmental factors (e.g. light, nutrients, temperature). However, how such reconciliation of KC reflects changes of phytoplankton physiological status versus that of community composition has not been well resolved. Therefore, using a dataset of coupled FRRF and C uptake measurements, we examined how the environmental dependency of KC potentially varied with parallel changes in phytoplankton community structure. Data were combined from 14 campaigns conducted during the summer season throughout 2007 to 2014 in the East China Sea (ECS) and Tsushima Strait (TS). KC varied considerably, but this variability was best explained by a linear relationship with light availability (R2 = 0.66). Co-variability between KC and light availability was slightly improved by considering data as 2 clusters of physico-chemical conditions (R2 = 0.74), but was best improved as 2 taxonomic clusters: samples dominated by micro-phytoplankton (>20 µm) versus small phytoplankton (nano + pico, <20 µm; R2 = 0.70-0.81). Interaction of phytoplankton community structure with light availability therefore explains the majority of variance of KC. The algorithms generated through our analysis therefore provide a means to examine C uptake with high resolution from future FRRF observations from these waters. KEY WORDS: Electron transfer rate · ETR · Primary productivity · Quantum requirement · Carbon fixation · Phytoplankton composition · Fast repetition rate fluorometry Full text in pdf format Supplementary material PreviousNextCite this article as: Zhu Y, Ishizaka J, Tripathy SC, Wang S and others (2017) Relationship between light, community composition and the electron requirement for carbon fixation in natural phytoplankton. Mar Ecol Prog Ser 580:83-100. https://doi.org/10.3354/meps12310 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 580. Online publication date: September 29, 2017 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2017 Inter-Research.