Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns
Differences in zooid skeletal ontogeny are strongly linked to the distribution of bryozoan species, even along such large-scale environmental gradients as depth and latitude. Three growth patterns broadly characterize zooid formation for encrusting cheilostome bryozoans: zooidal and intrazooidal bud...
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Language: | English |
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Cambridge University Press (CUP)
1990
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Online Access: | http://dx.doi.org/10.1017/s0094837300010010 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010010 |
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crcambridgeupr:10.1017/s0094837300010010 2024-03-03T08:47:07+00:00 Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns Lidgard, Scott 1990 http://dx.doi.org/10.1017/s0094837300010010 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010010 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Paleobiology volume 16, issue 3, page 304-321 ISSN 0094-8373 1938-5331 Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics journal-article 1990 crcambridgeupr https://doi.org/10.1017/s0094837300010010 2024-02-08T08:29:53Z Differences in zooid skeletal ontogeny are strongly linked to the distribution of bryozoan species, even along such large-scale environmental gradients as depth and latitude. Three growth patterns broadly characterize zooid formation for encrusting cheilostome bryozoans: zooidal and intrazooidal budding, which facilitate growth in two dimensions at colony margins; and frontal budding, which also permits upward growth in the third dimension. Analyses of skeletal growth patterns of encrusting species present in 230 Recent assemblages from the North Atlantic, Mediterranean, North Sea, and Gulf of Mexico show that species with zooidal budding dominate overwhelmingly at lower latitudes and in shallower water, as assessed by percentages of species within assemblages. In contrast, patterns within moderately diverse fossil assemblages from North America indicate that within the geographic and environmental limits sampled, species with intrazooidal budding once dominated and probably originated in shallow, warm water environments. Intrazooidal budding now occurs with greater relative frequency among species from deeper and higher latitude assemblages. Patterns for frontal budding suggest a slight decrease with increasing depth, but no consistent relationship with latitude. These paleoenvironmental trends occur withn a putatively monophyletic clade and are markedly similar to onshore/offshore trends recognized in other groups of marine benthos, based on patterns of occurrence of supra-specific taxa and novel morphotypes. Results presented here are based on relative dominance of species within assemblages and thus provide a novel comparative test of these previously reported trends. Article in Journal/Newspaper North Atlantic Cambridge University Press Paleobiology 16 3 304 321 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics Lidgard, Scott Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
topic_facet |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
description |
Differences in zooid skeletal ontogeny are strongly linked to the distribution of bryozoan species, even along such large-scale environmental gradients as depth and latitude. Three growth patterns broadly characterize zooid formation for encrusting cheilostome bryozoans: zooidal and intrazooidal budding, which facilitate growth in two dimensions at colony margins; and frontal budding, which also permits upward growth in the third dimension. Analyses of skeletal growth patterns of encrusting species present in 230 Recent assemblages from the North Atlantic, Mediterranean, North Sea, and Gulf of Mexico show that species with zooidal budding dominate overwhelmingly at lower latitudes and in shallower water, as assessed by percentages of species within assemblages. In contrast, patterns within moderately diverse fossil assemblages from North America indicate that within the geographic and environmental limits sampled, species with intrazooidal budding once dominated and probably originated in shallow, warm water environments. Intrazooidal budding now occurs with greater relative frequency among species from deeper and higher latitude assemblages. Patterns for frontal budding suggest a slight decrease with increasing depth, but no consistent relationship with latitude. These paleoenvironmental trends occur withn a putatively monophyletic clade and are markedly similar to onshore/offshore trends recognized in other groups of marine benthos, based on patterns of occurrence of supra-specific taxa and novel morphotypes. Results presented here are based on relative dominance of species within assemblages and thus provide a novel comparative test of these previously reported trends. |
format |
Article in Journal/Newspaper |
author |
Lidgard, Scott |
author_facet |
Lidgard, Scott |
author_sort |
Lidgard, Scott |
title |
Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
title_short |
Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
title_full |
Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
title_fullStr |
Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
title_full_unstemmed |
Growth in encrusting cheilostome bryozoans: II. Circum-Atlantic distribution patterns |
title_sort |
growth in encrusting cheilostome bryozoans: ii. circum-atlantic distribution patterns |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1017/s0094837300010010 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010010 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Paleobiology volume 16, issue 3, page 304-321 ISSN 0094-8373 1938-5331 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0094837300010010 |
container_title |
Paleobiology |
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16 |
container_issue |
3 |
container_start_page |
304 |
op_container_end_page |
321 |
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1792503265639792640 |