Photo-acclimation dynamics of the coral Stylophora pistillata to low and extremely low light

Titlyanov, E. A.; Titlyanova, T. V.; Yamazato, K.; Woesik, Robert van

doi:10.1016/s0022-0981(01)00309-4

Cited by 103 publications

(77 citation statements)

References 22 publications

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“…However, large variability in photosynthetic pigment concentrations (1.5-to 10-fold), which would directly affect light absorption, have been observed for Porites lutea colonies across a depth range of 2 to 20 m (Apprill et al 2007). Pigment concentrations can also vary according to light availability, although ratios of pigments appear to remain relatively constant (Falkowski & Dubinsky 1981, Dustan 1982, Titlyanov et al 2001, Stambler & Dubinsky 2005. Other investigations that have used respirometers to determine photosynthetic parameters , Mass et al 2007 show similar results to those described here; specifically decreased P max and increased α deeper in the water column.…”

Section: Depth and Turbidity Induced Photoacclimation Of Massive Corasupporting

confidence: 77%

Photoacclimation, growth and distribution of massive coral species in clear and turbid waters

Hennige¹,

Smith²,

Perkins³

et al. 2008

Mar. Ecol. Prog. Ser.

115

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Massive coral species play a key role in coral reef ecosystems, adding significantly to physical integrity, long term stability and reef biodiversity. This study coupled the assessment of the distribution and abundance of 4 dominant massive coral species, Diploastrea heliopora, Favia speciosa, F. matthaii and Porites lutea, with investigations into species-specific photoacclimatory responses within the Wakatobi Marine National Park of southeast Sulawesi, Indonesia, to determine the potential of photoacclimation to be a driver of biological success. For this, rapid light curves using pulse amplitude modulated (PAM) chlorophyll a fluorescence techniques were employed with additional manipulations to circumvent differences of light quality and absorption between species and across environmental gradients. P. lutea was examined over a range of depths and sites to determine patterns of photoacclimation, and all 4 species were assessed at a single depth between sites for which long-term data for coral community structure and growth existed. Light availability was more highly constrained with depth than between sites; consequently, photoacclimation patterns for P. lutea appeared greater with depth than across environmental gradients. All 4 species were found to differentially modify the extent of non-photochemical quenching to maintain a constant photochemical operating efficiency (qP). Therefore, our results suggest that these massive corals photoacclimate to ensure a constant light-dependent rate of reduction of the plastoquinone pool across growth environments.KEY WORDS: Chlorophyll a fluorescence ⋅ Zooxanthellae ⋅ PAM ⋅ Photoacclimation ⋅ Massive coral ⋅ Indo-Pacific Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 369: [77][78][79][80][81][82][83][84][85][86][87][88] 2008 adjustments that arise following a change in light environment (Falkowski & LaRoche 1991) and is genetically constrained (MacIntyre et al. 2002). Zooxanthellae (in hospite and isolated) photoacclimate in the same way as for many other microalgae, by adjusting various cellular constituents including pigmentation and number of 'reaction centres' for light harvesting (Falkowski & Dubinsky 1981, Iglesias-Prieto & Trench 1994. However, these patterns of photoacclimation have been largely deduced using cultures of zooxanthellae isolated from their coral host. Quantifying zooxanthellae photoacclimation in hospite is more problematic. In particular, the methods employed are often destructive to the coral and thus not practical to describe broad ecosystem processes (Falkowski & Dubinsky 1981). These techniques also require removal of the corals from their habitat and may thus perturb their natural physiological state (Jones & Hoegh-Guldberg 2001). Instead, researchers have turned towards the use of nondestructive chlorophyll a (chl a) fluorescence induction techniques, which are popular for examining phytoplankton and higher plant photophysiology, to investigate coral photophysiology; in particu...

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Section: Depth and Turbidity Induced Photoacclimation Of Massive Corasupporting

confidence: 77%

Photoacclimation, growth and distribution of massive coral species in clear and turbid waters

Hennige¹,

Smith²,

Perkins³

et al. 2008

Mar. Ecol. Prog. Ser.

115

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“…at 45 m, a trend also reported by Titlyanov et al (2001). However, Dustan (1982) and Titlyanov et al (2001) also found cases where areal chlorophyll increases with depth, to a limit where it falls off sharply due to a decrease in symbiont density.…”

Section: Discussionsupporting

confidence: 66%

“…Theoretically, the increase in either the algal density (Titlyanov et al 2001) or the pigmentation of each algal cell (Falkowski & Dubinsky 1981) is expected to increase light absorption, which is advantageous under low light (Dubinsky et al 1984). Under the very high light intensities common in the tropics on shallow reef tables, the opposite is true, since excess irradiance inhibits photosynthesis and generates harmful free radicals (Erez 1978, Levy et al 2006.…”

Section: Introductionmentioning

confidence: 99%

Photoacclimation of Stylophora pistillata to light extremes: metabolism and calcification

Mass¹,

Einbinder²,

Brokovich³

et al. 2007

Mar. Ecol. Prog. Ser.

175

163

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The hermatypic coral Stylophora pistillata has a wide bathymetric distribution (0 to 70 m). Within this range, light intensity decreases exponentially. Deep-water colonies are generally planar in morphology, with the upper part being dark and the bottom-facing part pale. Shallow-water colonies are generally subspherical and ivory in coloration. We studied the effects of photoacclimation on photosynthesis, respiration, and calcification in S. pistillata colonies along its bathymetric range over a reef profile (5 to 65 m) in Eilat, Gulf of Aqaba, Red Sea, during winter and summer, using a submersible respirometer. Respiration rate, light-saturated rate of photosynthesis (P max ), compensation light intensity (E c ), and light intensity of incipient saturation (E k ), all decreased with depth. In contrast, the efficiency of photosynthesis (α) increased with depth. All colonies displayed 'lightenhanced calcification' during daytime and decreasing calcification rates with depth. These results indicate an adjustment in harvesting and utilization of light by the algal symbionts to the light environment. At all light intensities except the lowest ones, there was a consistent ratio of calcification to photosynthesis, in agreement with the concept of light-enhanced calcification. In the deepest, lowlight corals, there was no evidence for support of calcification by photosynthesis, and we assume that these colonies subsist mainly by preying on zooplankton.

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“…In shallowwater corals, this mechanism is considered sufficient to meet the daily carbon demand for animal respiration and growth (Davies 1984, McCloskey & Muscatine 1984. In deeper depths, zooxanthellae adapt to lower light by increasing their relative photosynthetic efficiency (Kaiser et al 1993, Lesser et al 2000, Titlyanov et al 2001. Less photosynthetically fixed carbon is supplied to the animal part of the coral, but the reduced contribution of photosynthetic carbon at increasing water depth can partially be compensated by increasing the allochthonous nutrient supply (McCloskey & Muscatine 1984, Ferrier-Pagès et al 1998, Titlyanov et al 2000.…”

Section: Introductionmentioning

confidence: 99%

Stable isotopes reveal limitations in C and N assimilation in the Caribbean reef corals Madracis auretenra, M. carmabi and M. formosa

Maier¹,

Weinbauer²,

Pätzold³

2010

Mar. Ecol. Prog. Ser.

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Photo-acclimation dynamics of the coral Stylophora pistillata to low and extremely low light

Cited by 103 publications

References 22 publications

Photoacclimation, growth and distribution of massive coral species in clear and turbid waters

Photoacclimation, growth and distribution of massive coral species in clear and turbid waters

Photoacclimation of Stylophora pistillata to light extremes: metabolism and calcification

Stable isotopes reveal limitations in C and N assimilation in the Caribbean reef corals Madracis auretenra, M. carmabi and M. formosa

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