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Hassenrück, Christiane; Jantzen, Carin; Försterra, Günter; Häussermann, Verena; Willenz, Philippe (2013): Growth rates and skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at Isla Liliguapi (Fjord Comau, southern Chile). PANGAEA, https://doi.org/10.1594/PANGAEA.819832, Supplement to: Hassenrück, C et al. (2013): Rates of apical septal extension of Desmophyllum dianthus: effect of association with endolithic photo-autotrophs. Marine Biology, https://doi.org/10.1007/s00227-013-2281-x

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Abstract:
It has been hypothesized that endolithic photo-autotrophs inside the skeleton of cold-water corals may have a mutualistic relationship with the coral host positively affecting coral calcification. This study investigated the effect of endolithic photo-autotrophs on the apical septal extension of the cold-water coral Desmophyllum dianthus at Fjord Comau, southern Chile (42.41° - 42.15°S, 72.5°W). The fluorescent staining agent calcein was used to document the linear apical extension of septae for a period of one and a half years between 2006 and 2007. The results showed a severe reduction in extension rates associated with the presence of endolithic photo-autotrophs. Infested individuals grew about half as fast as non-infested polyps with a median value of 1.18 µm/day compared to 2.76 µm/day. Contrary to the initial hypothesis, these results point toward a parasitic relationship between D. dianthus and its endolithic photo-autotrophs potentially impairing coral fitness. However, further data on physiological parameters and other aspects of the calcification process are necessary to confirm these findings.
Coverage:
Median Latitude: -42.333629 * Median Longitude: -72.474089 * South-bound Latitude: -42.409833 * West-bound Longitude: -72.598580 * North-bound Latitude: -42.162030 * East-bound Longitude: -72.424333
Date/Time Start: 2010-05-04T13:00:00 * Date/Time End: 2010-09-15T03:50:00
Comment:
The fluorescent staining agent calcein was used to document coral growth by measuring the upward and inward linear extension of septa for a period of one and a half years from January 2006 to October 2007. During that time specimens of Desmophyllum dianthus were stained 4 times in-situ via SCUBA diving. In 2007 the polyps were harvested for sclerological analysis. Longitudinal (upward linear growth) and transversal (inward linear growth) thin section were prepared with a Buehler IsoMet low speed saw and a Buehler Alpha 2 speed grinder/polisher. Measurements were taken under a Zeiss Axioskop. Observations on skeletal density were recorded using x-ray computed tomography (140kV, 200µA, resolution: 56µm/100µm vertical). The data was used to determine differences in growth rates and skeletal density between D. dianthus infested by endolithic algae and non-infested individuals as well as to document the seasonal variability of growth rates.
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10 datasets

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Datasets listed in this publication series

  1. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Growth rates of the scleractinian cold-water coral Desmophyllum dianthus at Isla Liliguapi, Paso Comau, southern Chile. https://doi.org/10.1594/PANGAEA.806253
  2. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Growth rates of the scleractinian cold-water coral Desmophyllum dianthus at Punta_Gruesa (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807046
  3. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Growth rates of the scleractinian cold-water coral Desmophyllum dianthus at Punta_Huinay (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807047
  4. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Growth rates of the scleractinian cold-water coral Desmophyllum dianthus at Punto_Llonco (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807048
  5. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Growth rates of the scleractinian cold-water coral Desmophyllum dianthus at X-Huinay (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807049
  6. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at Isla Liliguapi, Paso Comau, southern Chile. https://doi.org/10.1594/PANGAEA.806254
  7. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at Punta Gruesa (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807050
  8. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at Punta_Huinay (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807051
  9. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at Punto_Llonco (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807052
  10. Hassenrück, C; Jantzen, C; Försterra, G et al. (2013): Skeletal density of the scleractinian cold-water coral Desmophyllum dianthus at X-Huinay (Fjord Comau, southern Chile). https://doi.org/10.1594/PANGAEA.807053