Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology
Coralline algae that form rhodoliths are widespread globally and their skeletal growth patterns have been used as (paleo-) environmental proxies in a variety of studies. However, growth interruptions (hiati) within their calcareous skeletons are regarded as problematic in this context. Here we inves...
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2021
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ftdoajarticles:oai:doaj.org/article:cbf1bbb3fbe046d8a871792dd58e9e2b 2023-05-15T14:59:12+02:00 Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology Moritz Schlüter Ines Pyko Max Wisshak Christian Schulbert Sebastian Teichert 2021-05-01T00:00:00Z https://doi.org/10.3390/min11050538 https://doaj.org/article/cbf1bbb3fbe046d8a871792dd58e9e2b EN eng MDPI AG https://www.mdpi.com/2075-163X/11/5/538 https://doaj.org/toc/2075-163X doi:10.3390/min11050538 2075-163X https://doaj.org/article/cbf1bbb3fbe046d8a871792dd58e9e2b Minerals, Vol 11, Iss 538, p 538 (2021) coralline algae environmental proxies growth increments polar carbonates Svalbard X-ray micro-computed tomography Mineralogy QE351-399.2 article 2021 ftdoajarticles https://doi.org/10.3390/min11050538 2022-12-31T15:26:11Z Coralline algae that form rhodoliths are widespread globally and their skeletal growth patterns have been used as (paleo-) environmental proxies in a variety of studies. However, growth interruptions (hiati) within their calcareous skeletons are regarded as problematic in this context. Here we investigated how hiati in the growth of Arctic rhodoliths from the Svalbard archipelago correspond to their environment and morphology. Using X-ray micro-computed tomography and stepwise model selections, we found that rhodoliths from deeper waters are subject to more frequent hiatus formation. In addition, rhodoliths with a higher sphericity (i.e., roundness) are less often affected by such growth interruptions. We conclude that these correlations are mainly regulated by hydrodynamics, because, in deeper waters, rhodoliths are not turned frequently enough to prevent a dieback of coralline algal thalli forming on the underside of the rhodolith. In this coherence, spheroidal rhodoliths are turned more easily, therefore shortening the amount of time between turnover events. Moreover, the incidence of light is more advantageous in shallower waters where rhodoliths exhibit a greater share of their surface to diffused ambient light, thus enabling thallus growth also on the down-facing surface of the rhodoliths. In consequence, information on the frequency of hiatus formation combined with rhodolith morphology might serve as a valuable proxy for (paleo-)environmental reconstructions in respect to light availability and the hydrodynamic regime. Article in Journal/Newspaper Arctic Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Svalbard Archipelago Minerals 11 5 538 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
coralline algae environmental proxies growth increments polar carbonates Svalbard X-ray micro-computed tomography Mineralogy QE351-399.2 |
spellingShingle |
coralline algae environmental proxies growth increments polar carbonates Svalbard X-ray micro-computed tomography Mineralogy QE351-399.2 Moritz Schlüter Ines Pyko Max Wisshak Christian Schulbert Sebastian Teichert Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
topic_facet |
coralline algae environmental proxies growth increments polar carbonates Svalbard X-ray micro-computed tomography Mineralogy QE351-399.2 |
description |
Coralline algae that form rhodoliths are widespread globally and their skeletal growth patterns have been used as (paleo-) environmental proxies in a variety of studies. However, growth interruptions (hiati) within their calcareous skeletons are regarded as problematic in this context. Here we investigated how hiati in the growth of Arctic rhodoliths from the Svalbard archipelago correspond to their environment and morphology. Using X-ray micro-computed tomography and stepwise model selections, we found that rhodoliths from deeper waters are subject to more frequent hiatus formation. In addition, rhodoliths with a higher sphericity (i.e., roundness) are less often affected by such growth interruptions. We conclude that these correlations are mainly regulated by hydrodynamics, because, in deeper waters, rhodoliths are not turned frequently enough to prevent a dieback of coralline algal thalli forming on the underside of the rhodolith. In this coherence, spheroidal rhodoliths are turned more easily, therefore shortening the amount of time between turnover events. Moreover, the incidence of light is more advantageous in shallower waters where rhodoliths exhibit a greater share of their surface to diffused ambient light, thus enabling thallus growth also on the down-facing surface of the rhodoliths. In consequence, information on the frequency of hiatus formation combined with rhodolith morphology might serve as a valuable proxy for (paleo-)environmental reconstructions in respect to light availability and the hydrodynamic regime. |
format |
Article in Journal/Newspaper |
author |
Moritz Schlüter Ines Pyko Max Wisshak Christian Schulbert Sebastian Teichert |
author_facet |
Moritz Schlüter Ines Pyko Max Wisshak Christian Schulbert Sebastian Teichert |
author_sort |
Moritz Schlüter |
title |
Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
title_short |
Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
title_full |
Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
title_fullStr |
Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
title_full_unstemmed |
Growth Interruptions in Arctic Rhodoliths Correspond to Water Depth and Rhodolith Morphology |
title_sort |
growth interruptions in arctic rhodoliths correspond to water depth and rhodolith morphology |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/min11050538 https://doaj.org/article/cbf1bbb3fbe046d8a871792dd58e9e2b |
geographic |
Arctic Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Svalbard Svalbard Archipelago |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_source |
Minerals, Vol 11, Iss 538, p 538 (2021) |
op_relation |
https://www.mdpi.com/2075-163X/11/5/538 https://doaj.org/toc/2075-163X doi:10.3390/min11050538 2075-163X https://doaj.org/article/cbf1bbb3fbe046d8a871792dd58e9e2b |
op_doi |
https://doi.org/10.3390/min11050538 |
container_title |
Minerals |
container_volume |
11 |
container_issue |
5 |
container_start_page |
538 |
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1766331324897951744 |