Reef expansion during the Triassic: Spread of photosymbiosis balancing climatic cooling

Journal article


Publication Details

Author(s): Kießling W
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology
Publisher: Elsevier
Publication year: 2010
Volume: 290
Pages range: 11-19
ISSN: 0031-0182


Abstract


The PaleoReefs Database indicates that reef abundance increased profoundly during the Triassic period, from a pronounced low in the Early Triassic to a major peak in the Norian. This expansion is also evident when standardizing for sampling. Corresponding to the reef expansion is a relative increase of scleractinian corals as reef builders, whereas the contribution of hypercalcifying sponges and microbes decreased during the Triassic. The numerical expansion of corals is paralleled by a proportional increase of morphological features that are suggestive of photosymbiosis, such that the Norian reef boom might be explained by the spread of photosymbiosis in corals. The geographical expansion of reefs was far less pronounced especially concerning palaeolatitude. Late Triassic reef growth was limited to more or less the same latitudinal range as modern reefs. As oxygen isotope data and new modeling results indicate declining temperatures and CO2 concentrations during the Late Triassic, the lack of latitudinal expansion might be attributed to global cooling. Reef development during the Triassic can thus be explained by the evolutionary spread of photosymbiosis balancing the effects of climatic cooling. © 2009 Elsevier B.V. All rights reserved.



FAU Authors / FAU Editors

Kießling, Wolfgang Prof. Dr.
Lehrstuhl für Paläoumwelt


How to cite

APA:
Kießling, W. (2010). Reef expansion during the Triassic: Spread of photosymbiosis balancing climatic cooling. Palaeogeography, Palaeoclimatology, Palaeoecology, 290, 11-19. https://dx.doi.org/10.1016/j.palaeo.2009.03.020

MLA:
Kießling, Wolfgang. "Reef expansion during the Triassic: Spread of photosymbiosis balancing climatic cooling." Palaeogeography, Palaeoclimatology, Palaeoecology 290 (2010): 11-19.

BibTeX: 

Last updated on 2018-11-08 at 00:55