Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues. / Ralph, P.J.; Gademann, R.; Larkum, A.W.D.; Kühl, Michael.

In: Marine Biology, Vol. 141, No. 4, 2002, p. 639-646.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Ralph, PJ, Gademann, R, Larkum, AWD & Kühl, M 2002, 'Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues', Marine Biology, vol. 141, no. 4, pp. 639-646. https://doi.org/10.1007/s00227-002-0866-x

APA

Ralph, P. J., Gademann, R., Larkum, A. W. D., & Kühl, M. (2002). Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues. Marine Biology, 141(4), 639-646. https://doi.org/10.1007/s00227-002-0866-x

Vancouver

Ralph PJ, Gademann R, Larkum AWD, Kühl M. Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues. Marine Biology. 2002;141(4):639-646. https://doi.org/10.1007/s00227-002-0866-x

Author

Ralph, P.J. ; Gademann, R. ; Larkum, A.W.D. ; Kühl, Michael. / Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues. In: Marine Biology. 2002 ; Vol. 141, No. 4. pp. 639-646.

Bibtex

@article{a7c3fbe074c511dbbee902004c4f4f50,
title = "Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues",
abstract = "Chlorophyll-a fluorescence was measured in six species of coral, using pulse-amplitude-modulated fluorometers employing fibre-optic probes with diameters of 8 mm, 1 mm and 140 µm. The 8-mm probe integrated responses over a large area, giving more weight to coenosarc than polyp tissue for Acropora nobilis. With 1-mm and 140-µm fibre-optic probes, the photosynthetic responses of zooxanthellae in the coenosarc and the polyp tissue of Acropora nobilis were distinguished. The polyp tissue exhibited a lower maximum in relative electron transport rate than did the coenosarc tissue, and was subject to down-regulation at higher irradiances. Coenosarc and polyp tissue (both containing zooxanthellae) showed a wide range of responses in the other corals. Down-regulation of photosynthesis in a single polyp of Pocillopora damicornis was followed after exposure to moderate irradiance, with recovery occurring over a further 4 h of shade conditions. All the corals (Acropora millepora, A. nobilis, Cyphastrea serailia, Montipora tuberculosa, Pocillopora damicornis and Porites cylindrica) showed evidence of strong down-regulation of photosynthesis under high irradiance, and little evidence of photoinhibitory damage to photosystem II.",
author = "P.J. Ralph and R. Gademann and A.W.D. Larkum and Michael K{\"u}hl",
year = "2002",
doi = "10.1007/s00227-002-0866-x",
language = "English",
volume = "141",
pages = "639--646",
journal = "Marine Biology",
issn = "0025-3162",
publisher = "Springer",
number = "4",

}

RIS

TY - JOUR

T1 - Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues

AU - Ralph, P.J.

AU - Gademann, R.

AU - Larkum, A.W.D.

AU - Kühl, Michael

PY - 2002

Y1 - 2002

N2 - Chlorophyll-a fluorescence was measured in six species of coral, using pulse-amplitude-modulated fluorometers employing fibre-optic probes with diameters of 8 mm, 1 mm and 140 µm. The 8-mm probe integrated responses over a large area, giving more weight to coenosarc than polyp tissue for Acropora nobilis. With 1-mm and 140-µm fibre-optic probes, the photosynthetic responses of zooxanthellae in the coenosarc and the polyp tissue of Acropora nobilis were distinguished. The polyp tissue exhibited a lower maximum in relative electron transport rate than did the coenosarc tissue, and was subject to down-regulation at higher irradiances. Coenosarc and polyp tissue (both containing zooxanthellae) showed a wide range of responses in the other corals. Down-regulation of photosynthesis in a single polyp of Pocillopora damicornis was followed after exposure to moderate irradiance, with recovery occurring over a further 4 h of shade conditions. All the corals (Acropora millepora, A. nobilis, Cyphastrea serailia, Montipora tuberculosa, Pocillopora damicornis and Porites cylindrica) showed evidence of strong down-regulation of photosynthesis under high irradiance, and little evidence of photoinhibitory damage to photosystem II.

AB - Chlorophyll-a fluorescence was measured in six species of coral, using pulse-amplitude-modulated fluorometers employing fibre-optic probes with diameters of 8 mm, 1 mm and 140 µm. The 8-mm probe integrated responses over a large area, giving more weight to coenosarc than polyp tissue for Acropora nobilis. With 1-mm and 140-µm fibre-optic probes, the photosynthetic responses of zooxanthellae in the coenosarc and the polyp tissue of Acropora nobilis were distinguished. The polyp tissue exhibited a lower maximum in relative electron transport rate than did the coenosarc tissue, and was subject to down-regulation at higher irradiances. Coenosarc and polyp tissue (both containing zooxanthellae) showed a wide range of responses in the other corals. Down-regulation of photosynthesis in a single polyp of Pocillopora damicornis was followed after exposure to moderate irradiance, with recovery occurring over a further 4 h of shade conditions. All the corals (Acropora millepora, A. nobilis, Cyphastrea serailia, Montipora tuberculosa, Pocillopora damicornis and Porites cylindrica) showed evidence of strong down-regulation of photosynthesis under high irradiance, and little evidence of photoinhibitory damage to photosystem II.

U2 - 10.1007/s00227-002-0866-x

DO - 10.1007/s00227-002-0866-x

M3 - Journal article

VL - 141

SP - 639

EP - 646

JO - Marine Biology

JF - Marine Biology

SN - 0025-3162

IS - 4

ER -

ID: 136442