On the causes of interspecific differences in the growth-irradiance relationship for phytoplankton. Part I. A comparative study of the growth-irradiance relationship of three marine phytoplankton species: Skeletonema costatum, Olisthodiscus luteus and Gonyaulax tamarensis

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Abstract

Three marine phytoplankton species (Skeletonema costatum, Olisthodiscus luteus andGonyaulax tamarensis) were grown in batch cultures at 15°C and a 14:10 L:D cycle at irradiance levels ranging from 5 to 450 μEinst m-2 s-1. At each irradiance, during exponential growth, concurrent measurements were made of cell division, carbon-specific growth rate, photosynthetic performance (both O2 and POC production), dark respiration, and cellular composition in terms of C, N and chlorophyll a. The results indicate that the three species were similar with respect to chemical composition, C:N (atomic) = 6.9 ± 0.4, photo-synthetic quotient, 1.43 ± 0.09, and photosynthetic efficiency, 2.3 ±0.1 × 10-3 μmol O2 (μg Chl a)-1 h-1 (μEinst m-2 s-1)-1. Differences in maximum growth rate varied as the -0.24 power of cell carbon. Differences in growth efficiency, were best explained by a power function of Chl a:C at μ = 0. Compensation intensities, ranged from 1.1 μEinst m-2 s-1 for S. costatum to 35 forG. tamarensis and were found to be a linear function of the maintenance respiration rate. The results indicate that interspecific differences in the μ-I relationship can be adequately explained in terms of just three parameters: cell carbon at maximum growth rate, the C:Chl a ratio (at the limit as growth approaches zero) and the respiration rate at zero growth rate. A light-limited algal growth model based on these results gave an excellent fit to the experimental μ-I curves and explained 97% of the observed interspecific variability.

Original languageEnglish
Pages (from-to)459-482
Number of pages24
JournalJournal of Plankton Research
Volume9
Issue number3
DOIs
StatePublished - Dec 1 1987
Externally publishedYes

Fingerprint

Olisthodiscus
Gonyaulax
Skeletonema costatum
Phytoplankton
Irradiance
Comparative Study
irradiance
comparative study
Respiration
phytoplankton
Carbon
respiration
carbon
cell respiration
interspecific variation
specific growth rate
growth models
Chlorophyll a
cell division
light intensity

ASJC Scopus subject areas

  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Ecology
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

Cite this

@article{eb3e1c3926ca4654bdfc1870f10c5dd9,
title = "On the causes of interspecific differences in the growth-irradiance relationship for phytoplankton. Part I. A comparative study of the growth-irradiance relationship of three marine phytoplankton species: Skeletonema costatum, Olisthodiscus luteus and Gonyaulax tamarensis",
abstract = "Three marine phytoplankton species (Skeletonema costatum, Olisthodiscus luteus andGonyaulax tamarensis) were grown in batch cultures at 15°C and a 14:10 L:D cycle at irradiance levels ranging from 5 to 450 μEinst m-2 s-1. At each irradiance, during exponential growth, concurrent measurements were made of cell division, carbon-specific growth rate, photosynthetic performance (both O2 and POC production), dark respiration, and cellular composition in terms of C, N and chlorophyll a. The results indicate that the three species were similar with respect to chemical composition, C:N (atomic) = 6.9 ± 0.4, photo-synthetic quotient, 1.43 ± 0.09, and photosynthetic efficiency, 2.3 ±0.1 × 10-3 μmol O2 (μg Chl a)-1 h-1 (μEinst m-2 s-1)-1. Differences in maximum growth rate varied as the -0.24 power of cell carbon. Differences in growth efficiency, were best explained by a power function of Chl a:C at μ = 0. Compensation intensities, ranged from 1.1 μEinst m-2 s-1 for S. costatum to 35 forG. tamarensis and were found to be a linear function of the maintenance respiration rate. The results indicate that interspecific differences in the μ-I relationship can be adequately explained in terms of just three parameters: cell carbon at maximum growth rate, the C:Chl a ratio (at the limit as growth approaches zero) and the respiration rate at zero growth rate. A light-limited algal growth model based on these results gave an excellent fit to the experimental μ-I curves and explained 97{\%} of the observed interspecific variability.",
author = "Chris Langdon",
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doi = "10.1093/plankt/9.3.459",
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AU - Langdon, Chris

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