Gender-related differences in the apparent timing of skeletal density bands in the reef-building coral Siderastrea siderea

Carricart‐Ganivet, Juan P.; Vasquez-Bedoya, L. F.; Cabañillas-Terán, Nancy; Blanchon, Paul

doi:10.1007/s00338-013-1028-y

Cited by 29 publications

(27 citation statements)

References 28 publications

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“…As P. lobata is characterized as a gonochoric brooder coral (Harrison, 2011), it seems likely that female colonies will decrease their growth to a greater extent than males during periods of the gametogenesis, thereby generating differences in calcification rates between genders (Figure 4). Also, this is confirmed by the differences in tissue thickness between genders (Figure 5), where males typically present a greater thickness than females (Carricart-Ganivet et al, 2013), and this is including herein for most morphotypes. Therefore, both gender and morphotype appear to affect the growth of P. lobata.…”

Section: Discussionsupporting

confidence: 60%

“…Then, they continue to form until the end of the summer season 6 months later. This is due to the porous nature Poritid skeletons, a characteristic that allows continuing depositing calcium carbonate under the tissue layer Lough, 1992, 1993;Carricart-Ganivet et al, 2013;Tortolero-Langarica et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…In addition, tissue thickness was also used to determine the timing of high density (HD) band depositation, which can be readily calculated due to the well understand impact of depth tissue on the apparent density band formation on corals with porous skeletons, such as Porites species (Barnes and Lough, 1993). The differences between real and apparent timing of density-band formation was estimated using the method described by Carricart-Ganivet et al (2013), and indicated as the apparent time differences (ATD).…”

Section: Coral Growth Measurementsmentioning

confidence: 99%

“…In consequence, genders may present different annual growth parameters between them (Cabral-Tena et al, 2013). Therefore, the coral's genders may affect the interpretation of the environmental proxies bound within the skeleton (Carricart-Ganivet et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Differences in Growth and Calcification Rates in the Reef-Building Coral Porites lobata: The Implications of Morphotype and Gender on Coral Growth

et al. 2016

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Corals display different growth forms as an adaptive response to both local and global environmental conditions. Despite the importance of morphologic variability on corals, growth and calcification rates of different coral morphotypes have been poorly recorded in the Eastern Pacific. The purpose of this study was to compare annual extension rate (cm yr −1 ), skeletal density (g cm −3 ), calcification rate (g cm −2 yr −1 ), and tissue thickness (mm) of males and females colonies in three different morphotypes of the common reef-building coral Porites lobata; columnar, massive, and free-living (corallith) forms. The results show significant differences in all four-growth parameters between morphotypes over a 6-year interval, and also differences between males and females in most morphotypes. Massive colonies presented 15-33% faster annual rates compared with columnar and free-living. Male colonies showed 30-40% faster annual rates than females for both columnar and corallith morphologies. These data exhibit the extensive plasticity of this species and highlight the fact that each morphotype × gender group produced a different physiological response to environmental conditions. Therefore, these information reveal that P. lobata from the Eastern Tropical Pacific develops different morphologies to allow it to maintain coral species population, characteristics that enhance the species possibility to further its distribution across the reef-framework.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Section: Coral Growth Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Differences in Growth and Calcification Rates in the Reef-Building Coral Porites lobata: The Implications of Morphotype and Gender on Coral Growth

et al. 2016

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“…Further complicating the issue, [Carricart-Ganivet et al, 2013] reported a 6 month difference in the timing of high and low density bands between male and female S. siderea collected from Puerto Morelos Reef, Mexico. This divergence in timing was attributed to variations in tissue thickness between males (thicker tissue, more rapid extension rate) and females (thinner tissue, denser skeleton) and should be considered prior to geochemical analysis [CarricartGanivet et al, 2013].…”

Section: Genus Siderastreamentioning

confidence: 99%

Reef cores as records of Holocene water temperatures of the southern Great Barrier Reef: Geochemical analysis of traditional (Porites) and non-traditional (Acropora) reef building corals

Sadler¹

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In order to accurately predict future climate variations induced by natural and anthropogenic forcings, we require a detailed understanding of the Earth's climate system. With such temporally limited instrumental records, proxy-based reconstructions are an invaluable source of climate information. Current paleoclimate databases indicate a lack of records representing the southern hemisphere and tropics; key regions that can be represented by high resolution, coral geochemistry-based climate reconstructions.Reef coring techniques allow the recovery of significant proportions of coral material from throughout the Holocene, Pleistocene and beyond. Given the high species diversity of IndoPacific coral reefs, the presence of massive Porites commonly used for climate reconstruction is likely to be limited in reef cores. Corymbose Acropora, however, displays a high abundance in modern and fossil reef records and thus could act as a major source of new climate information from the Earth's recent history.Previous investigations of Acropora geochemistry have focused on branches, with significant levels of secondary thickening smoothing environmental signals otherwise recorded by the Sr/Ca ratio paleothermometer. This project investigates the potential of Acropora interbranch skeleton as a climate archive, following the identification of annual density banding patterns in computed tomography scans. Scanning electron microscopy based documentation of structure and growth patterns reveal that inter-branch skeleton is atypical for Acropora.Low linear extension rates, a simplified skeletal structure with limited secondary aragonite deposition, approximately horizontal density bands and seasonal cyclicity in Sr/Ca ratios bear a greater resemblance to massive corals such as Porites. These observations, combined with a high abundance in past and present Indo-Pacific reefs, suggest that inter-branch skeletal growth in Acropora may prove to be a valuable source of untapped paleoclimate information.A site-specific calibration for Acropora inter-branch skeleton Sr/Ca ratios to water temperature was conducted using modern corymbose Acropora colonies and concomitant instrumental water temperature records from the lagoon and fore-reef slope of Heron Reef, southern Great Barrier Reef (GBR). Large inter-colony differences in Sr/Ca ratios were observed in the modern cores, suggesting that inter-branch skeleton may not be a suitable archive for absolute temperature reconstruction. Normalisation of each Sr/Ca record to the corresponding core mean does, however, remove these inter-colony differences and allows the reconstruction of the seasonal water temperature amplitude with a sensitivity of −0.05 ii mmol/mol/°C. Application of the resulting transfer equation to the modern inter-branch skeleton Sr/Ca record successfully identified the greater seasonal temperature range of the lagoon compared to the adjacent reef slope. A site-specific calibration also was completed for southern GBR Porites at Heron Reef using the reef slope water te...

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Comparison of equatorial Pacific sea surface temperature variability and trends with Sr/Ca records from multiple corals

et al. 2016

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Coral Sr/Ca is widely used to reconstruct past ocean temperatures. However, some studies report different Sr/Ca-temperature relationships for conspecifics on the same reef, with profound implications for interpretation of reconstructed temperatures. We assess whether these differences are attributable to small-scale oceanographic variability or "vital effects" associated with coral calcification and quantify the effect of intercolony differences on temperature estimates and uncertainties. Sr/Ca records from four massive Porites colonies growing on the east and west sides of Jarvis Island, central equatorial Pacific, were compared with in situ logger temperatures spanning 2002-2012. In general, Sr/Ca captured the occurrence of interannual sea surface temperature events but their amplitude was not consistently recorded by any of the corals. No long-term trend was identified in the instrumental data, yet Sr/Ca of one coral implied a statistically significant cooling trend while that of its neighbor implied a warming trend. Slopes of Sr/Ca-temperature regressions from the four different colonies were within error, but offsets in mean Sr/Ca rendered the regressions statistically distinct. Assuming that these relationships represent the full range of Sr/Ca-temperature calibrations in Jarvis Porites, we assessed how well Sr/Ca of a nonliving coral with an unknown Sr/Ca-temperature relationship can constrain past temperatures. Our results indicate that standard error of prediction methods underestimate the actual error as we could not reliably reconstruct the amplitude or frequency of El Niño-Southern Oscillation events as large as ± 2°C. Our results underscore the importance of characterizing the full range of temperature-Sr/Ca relationships at each study site to estimate true error.

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Gender-related differences in the apparent timing of skeletal density bands in the reef-building coral Siderastrea siderea

Cited by 29 publications

References 28 publications

Differences in Growth and Calcification Rates in the Reef-Building Coral Porites lobata: The Implications of Morphotype and Gender on Coral Growth

Differences in Growth and Calcification Rates in the Reef-Building Coral Porites lobata: The Implications of Morphotype and Gender on Coral Growth

Reef cores as records of Holocene water temperatures of the southern Great Barrier Reef: Geochemical analysis of traditional (Porites) and non-traditional (Acropora) reef building corals

Comparison of equatorial Pacific sea surface temperature variability and trends with Sr/Ca records from multiple corals

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