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• W2090871156 abstract "AB Aquatic Biology Contact the journal Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections AB 3:19-30 (2008) - DOI: https://doi.org/10.3354/ab00059 In situ measurements and model calculations of primary production in turbid waters Helgi Arst1,*, Tiina Nõges2, Peeter Nõges2,3, Birgot Paavel1 1Estonian Marine Institute, University of Tartu, Mäealuse St. 10A, 12618 Tallinn, Estonia 2Centre for Limnology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 61101 Rannu, Tartumaa, Estonia 3European Commission, DG Joint Research Centre, Institute for Environment and Sustainability, TP483, Via E. Fermi, 21020 Ispra (VA), Italy *Email: helgi.arst@sea.ee ABSTRACT: Data on the productivity of aquatic ecosystems helps to understand the food web relationships and functioning of these ecosystems. A semi-empirical model for calculating the phytoplankton primary production in turbid waters was elaborated. In situ measurements of the necessary bio-optical parameters were collected in 3 turbid Estonian lakes from 2003 to 2005. Secchi depth, chlorophyll a, and integrated primary production ranged from 0.1 to 3 m, 4.2 to 389 mg m–3, and 17 to 435 mg C m–2 h–1, respectively. Two model versions (spectral and integral) were developed for calculating the vertical profiles of primary production, P(z). The basic equation described P(z) as a function of photosynthetically absorbed radiation and quantum yield of carbon fixation. The main difference between the models resides in the data on underwater irradiance. We also derived a new algorithm for calculating the vertical profiles of the quantum yield. According to the statistical parameters the preferable model is the spectral model, but the integral model can also be recommended. The quality of the integral model was increased by changing the coefficients in the quantum yield algorithm, by which we compensated for the errors in photosynthetically absorbed radiation in this model. We conclude that the spectral and integral models perform well in computing primary production in turbid lakes. Both models allowed estimation of the primary production profiles and integrated production of the water column, as well as the daily dynamics and daily and monthly totals. KEY WORDS: Limnology · Marine optics · Bio-optical parameters of lakes · Primary production Full text in pdf format PreviousNextCite this article as: Arst H, Nõges T, Nõges P, Paavel B (2008) In situ measurements and model calculations of primary production in turbid waters. Aquat Biol 3:19-30. https://doi.org/10.3354/ab00059 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AB Vol. 3, No. 1. Online publication date: July 01, 2008 Print ISSN: 1864-7782; Online ISSN: 1864-7790 Copyright © 2008 Inter-Research." @default.
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• W2090871156 date "2008-07-01" @default.
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• W2090871156 title "In situ measurements and model calculations of primary production in turbid waters" @default.
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