Photosynthetic performance of transplanted ecotypes of Ecklonia cava (Laminariales, Phaeophyta)

Serisawa, Yukihiko, Yokohama, Yasutsugu, Aruga, Yusho and Bellgrove, Alecia 2004, Photosynthetic performance of transplanted ecotypes of Ecklonia cava (Laminariales, Phaeophyta), Journal of applied phycology, vol. 16, no. 3, pp. 227-235, doi: 10.1023/

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Title Photosynthetic performance of transplanted ecotypes of Ecklonia cava (Laminariales, Phaeophyta)
Formatted title Photosynthetic performance of transplanted ecotypes of Ecklonia cava (Laminariales, Phaeophyta)
Author(s) Serisawa, Yukihiko
Yokohama, Yasutsugu
Aruga, Yusho
Bellgrove, AleciaORCID iD for Bellgrove, Alecia
Journal name Journal of applied phycology
Volume number 16
Issue number 3
Start page 227
End page 235
Publisher Kluwer Academic Publishers
Place of publication Dordrecht, Netherlands
Publication date 2004
ISSN 0921-8971
Summary Young sporophytes of short-stipe ecotype of Ecklonia cava from a warmer locality (Tei, Kochi Pref., southern Japan) and those of long-stipe ecotype from a cooler locality (Nabeta, Shizuoka Pref., central Japan) were transplanted in 1995 to artificial reefs immersed at the habitat of long-stipe ecotype in Nabeta Bay, Shizuoka Pref., central Japan. The characteristics of photosynthesis and respiration of bladelets of the transplanted sporophytes of the two ecotypes were compared in winter and summer 1997; the results were assessed per unit area, per unit chlorophyllacontent and per unit dry weight. In photosynthesis-light curves at 10–29 °C, light saturation occurred at 200–400 µmol photon m–2s–1in sporophytes from both Tei and Nabeta. The maximum photosynthetic rate (P max) at 10–29 °C and the light-saturation index (I k) at 25–29 °C in sporophytes from both localities were generally higher in winter than in summer.Pmax at 25–29 °C (per unit area and chlorophylla) were higher in sporophytes from Tei than those from Nabeta in both seasons. The optimum temperature for photosynthesis was 25 °C in winter and 27 °C in summer at high light intensities of 100–400 µmol photon m–2s–1. However, at lower light intensities of 12.5–50 µmol photon m–2s–1, it was 20 °C in winter and 25–27 °C in summer for sporophytes from both locations. Dark respiration increased with temperature rise in the range of 10–29 °C in sporophytes from both locations in summer and winter. The sporophytes transplanted from Tei (warmer area) showed higher photosynthetic activities than those from Nabeta (cooler area) at warmer temperatures even under the same environmental conditions. This indicates that these physiological ecotypes have arisen from genetic differentiation.
Language eng
DOI 10.1023/
Field of Research 060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2004, Kluwer Academic Publishers
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