Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt
In the subtropical belt highly productive ecosystems are formed by coral reefs in oligotrophic seas. Towards more eutrophic conditions, coral reefs diminish and are subsequently replaced by highly productive kelp forests. In high latitudes framework constructing carbonate production is enhanced by t...
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ftoceanrep:oai:oceanrep.geomar.de:32043 2023-05-15T17:43:34+02:00 Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt Freiwald, André 1993 text https://oceanrep.geomar.de/id/eprint/32043/ https://oceanrep.geomar.de/id/eprint/32043/1/Freiwald2.pdf https://doi.org/10.1007/BF02536925 en eng Springer https://oceanrep.geomar.de/id/eprint/32043/1/Freiwald2.pdf Freiwald, A. (1993) Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt. Facies, 29 (1). pp. 133-148. DOI 10.1007/BF02536925 <https://doi.org/10.1007/BF02536925>. doi:10.1007/BF02536925 Article PeerReviewed 1993 ftoceanrep https://doi.org/10.1007/BF02536925 2023-04-07T15:24:50Z In the subtropical belt highly productive ecosystems are formed by coral reefs in oligotrophic seas. Towards more eutrophic conditions, coral reefs diminish and are subsequently replaced by highly productive kelp forests. In high latitudes framework constructing carbonate production is enhanced by the growth of branching coralline algae which predominantly generate maerl-type deposits. On a global view, these coralline algal ecosystems show an island-like distribution pattern within the phaeophytic kelp belt. Compared to kelp ecosystems, coralline-algaldominated ecosystems have low rates of productivity. Therefore, it is reasonable to seek the pronounced competitive value of the extremely slow-growing corallines. Due to their low annual growth increment, the coralline algae studied are very endangered by abiotic physical disturbances and by overgrowth of rapidly growing filamentous algae or sessile invertebrates. To overcome fouling pressure and storm-triggered physical disturbances, coralline algae thrive well in wave-sheltered headlands or skerry areas and generate characteristic ‘denuded areas’ by intense herbivory. This general distributional pattern is also true for high-boreal to subarctic coralline algal bioherms in northern Norway. Such a complex biological feedback maintains a high potential of self-regulation or self-organization in the algal reef bioherms. The different proponents involved in feedback processes include bacterial colonization, diatom microfouling and selective induction of larval metamorphosis. The negative impact of diatom microfouling and the important role of herbivores are relevant activities in the feedback system on a microscopic scale. Macroscopically, intense herbivory on coralline algae create denuded conditions, which are a widespread phenomenon in coralline algal ecosystems. Article in Journal/Newspaper Northern Norway Subarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Norway Facies 29 1 133 148 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
In the subtropical belt highly productive ecosystems are formed by coral reefs in oligotrophic seas. Towards more eutrophic conditions, coral reefs diminish and are subsequently replaced by highly productive kelp forests. In high latitudes framework constructing carbonate production is enhanced by the growth of branching coralline algae which predominantly generate maerl-type deposits. On a global view, these coralline algal ecosystems show an island-like distribution pattern within the phaeophytic kelp belt. Compared to kelp ecosystems, coralline-algaldominated ecosystems have low rates of productivity. Therefore, it is reasonable to seek the pronounced competitive value of the extremely slow-growing corallines. Due to their low annual growth increment, the coralline algae studied are very endangered by abiotic physical disturbances and by overgrowth of rapidly growing filamentous algae or sessile invertebrates. To overcome fouling pressure and storm-triggered physical disturbances, coralline algae thrive well in wave-sheltered headlands or skerry areas and generate characteristic ‘denuded areas’ by intense herbivory. This general distributional pattern is also true for high-boreal to subarctic coralline algal bioherms in northern Norway. Such a complex biological feedback maintains a high potential of self-regulation or self-organization in the algal reef bioherms. The different proponents involved in feedback processes include bacterial colonization, diatom microfouling and selective induction of larval metamorphosis. The negative impact of diatom microfouling and the important role of herbivores are relevant activities in the feedback system on a microscopic scale. Macroscopically, intense herbivory on coralline algae create denuded conditions, which are a widespread phenomenon in coralline algal ecosystems. |
format |
Article in Journal/Newspaper |
author |
Freiwald, André |
spellingShingle |
Freiwald, André Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
author_facet |
Freiwald, André |
author_sort |
Freiwald, André |
title |
Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
title_short |
Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
title_full |
Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
title_fullStr |
Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
title_full_unstemmed |
Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt |
title_sort |
coralline algal maerl frameworks-islands within the phaeophytic kelp belt |
publisher |
Springer |
publishDate |
1993 |
url |
https://oceanrep.geomar.de/id/eprint/32043/ https://oceanrep.geomar.de/id/eprint/32043/1/Freiwald2.pdf https://doi.org/10.1007/BF02536925 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway Subarctic |
genre_facet |
Northern Norway Subarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/32043/1/Freiwald2.pdf Freiwald, A. (1993) Coralline algal maerl frameworks-Islands within the phaeophytic kelp belt. Facies, 29 (1). pp. 133-148. DOI 10.1007/BF02536925 <https://doi.org/10.1007/BF02536925>. doi:10.1007/BF02536925 |
op_doi |
https://doi.org/10.1007/BF02536925 |
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Facies |
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29 |
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133 |
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148 |
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