Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm
A transect from the bathyal to proximal shelf facies of the Boreal Realm was investigated to compare spatial and temporal distribution changes of calcareous dinoflagellate cysts (c-dinocysts) throughout the mid-Cenomanian in order to gain information on the ecology of these organisms. Pithonelloidea...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.735804 2023-05-15T16:12:19+02:00 Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm Wendler, Jens E Gräfe, Kai-Uwe Willems, Helmut MEDIAN LATITUDE: 50.524050 * MEDIAN LONGITUDE: -2.984650 * SOUTH-BOUND LATITUDE: 48.516000 * WEST-BOUND LONGITUDE: -13.438700 * NORTH-BOUND LATITUDE: 54.594200 * EAST-BOUND LONGITUDE: 13.418800 * DATE/TIME START: 1981-06-30T00:00:00 * DATE/TIME END: 1981-06-30T00:00:00 2002-03-29 application/zip, 8 datasets https://doi.pangaea.de/10.1594/PANGAEA.735804 https://doi.org/10.1594/PANGAEA.735804 en eng PANGAEA Wendler, Jens E (2001): Reconstruction of astronomically-forced cyclic and abrupt paleoecological changes in the upper cretaceous boreal realm based on calcareous dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 183, 149 pp, urn:nbn:de:gbv:46-diss000001986 https://doi.pangaea.de/10.1594/PANGAEA.735804 https://doi.org/10.1594/PANGAEA.735804 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wendler, Jens E; Gräfe, Kai-Uwe; Willems, Helmut (2002): Palaeoecology of calcareous dinoflagellate cysts in the mid-Cenomanian Boreal Realm - Implications for the reconstruction of palaeoceanography of the NW European shelf sea. Cretaceous Research, 23, 213-229, https://doi.org/10.1006/cres.2002.0311 80-550B Calais-Escalles Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GeoB Geosciences University of Bremen Glomar Challenger HAND Leg80 North Atlantic/PLAIN Oder Estuary RCD Rotary core drilling Ruegen Sampling by hand Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.735804 https://doi.org/10.1006/cres.2002.0311 2023-01-20T07:31:43Z A transect from the bathyal to proximal shelf facies of the Boreal Realm was investigated to compare spatial and temporal distribution changes of calcareous dinoflagellate cysts (c-dinocysts) throughout the mid-Cenomanian in order to gain information on the ecology of these organisms. Pithonelloideae dominated the cyst assemblages to more than 95% on the shelf, a prevalence that can be observed throughout most of the Upper Cretaceous. The affinity of this group with the dinoflagellates, which is still controversially discussed, can be confirmed, based on evidence from morphological features and distribution patterns. The consistent prevalence of Pithonella sphaerica and P. ovalis in c-dinocyst assemblages throughout the Upper Cretaceous indicates that they were produced more frequently than cysts of the other species and might, therefore, represent a vegetative dinoflagellate life stage. P. sphaerica and P. ovalis are interpreted as eutrophic species. P. sphaerica is the main species in a marginal-shelf upwelling area, offshore Fennoscandia. Here, sedimentary cyclicity appears to have been reduced to the strongest light/dark changes, while in the outer shelf sediments, light/dark cycles are well-developed and show pronounced temporal assemblage changes. Cyclic fluctuations in the P. sphaerica / P. ovalis ratio reflect shifts of the preferred facies zones and indicate changes in surface mixing patterns. During periods of enhanced surface mixing most parts of the shelf were well-ventilated, and nutrient-enriched surface waters led to high productivity and dominance of the Pithonelloideae. These conditions on the shelf contrasted with those in the open ocean, where more oligotrophic and probably stratified waters prevailed, and an assemblage with very few Pithonelloideae and dominance of Cubodinellum renei and Orthopithonella ? gustafsonii was characteristic. While orbitally-forced light/dark sedimentary cyclicity of the shelf sections was mainly related to surface-water carbonate productivity changes, no cyclic ... Dataset Fennoscandia North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-13.438700,13.418800,54.594200,48.516000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
80-550B Calais-Escalles Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GeoB Geosciences University of Bremen Glomar Challenger HAND Leg80 North Atlantic/PLAIN Oder Estuary RCD Rotary core drilling Ruegen Sampling by hand |
spellingShingle |
80-550B Calais-Escalles Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GeoB Geosciences University of Bremen Glomar Challenger HAND Leg80 North Atlantic/PLAIN Oder Estuary RCD Rotary core drilling Ruegen Sampling by hand Wendler, Jens E Gräfe, Kai-Uwe Willems, Helmut Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
topic_facet |
80-550B Calais-Escalles Deep Sea Drilling Project DRILL Drilling/drill rig DSDP GeoB Geosciences University of Bremen Glomar Challenger HAND Leg80 North Atlantic/PLAIN Oder Estuary RCD Rotary core drilling Ruegen Sampling by hand |
description |
A transect from the bathyal to proximal shelf facies of the Boreal Realm was investigated to compare spatial and temporal distribution changes of calcareous dinoflagellate cysts (c-dinocysts) throughout the mid-Cenomanian in order to gain information on the ecology of these organisms. Pithonelloideae dominated the cyst assemblages to more than 95% on the shelf, a prevalence that can be observed throughout most of the Upper Cretaceous. The affinity of this group with the dinoflagellates, which is still controversially discussed, can be confirmed, based on evidence from morphological features and distribution patterns. The consistent prevalence of Pithonella sphaerica and P. ovalis in c-dinocyst assemblages throughout the Upper Cretaceous indicates that they were produced more frequently than cysts of the other species and might, therefore, represent a vegetative dinoflagellate life stage. P. sphaerica and P. ovalis are interpreted as eutrophic species. P. sphaerica is the main species in a marginal-shelf upwelling area, offshore Fennoscandia. Here, sedimentary cyclicity appears to have been reduced to the strongest light/dark changes, while in the outer shelf sediments, light/dark cycles are well-developed and show pronounced temporal assemblage changes. Cyclic fluctuations in the P. sphaerica / P. ovalis ratio reflect shifts of the preferred facies zones and indicate changes in surface mixing patterns. During periods of enhanced surface mixing most parts of the shelf were well-ventilated, and nutrient-enriched surface waters led to high productivity and dominance of the Pithonelloideae. These conditions on the shelf contrasted with those in the open ocean, where more oligotrophic and probably stratified waters prevailed, and an assemblage with very few Pithonelloideae and dominance of Cubodinellum renei and Orthopithonella ? gustafsonii was characteristic. While orbitally-forced light/dark sedimentary cyclicity of the shelf sections was mainly related to surface-water carbonate productivity changes, no cyclic ... |
format |
Dataset |
author |
Wendler, Jens E Gräfe, Kai-Uwe Willems, Helmut |
author_facet |
Wendler, Jens E Gräfe, Kai-Uwe Willems, Helmut |
author_sort |
Wendler, Jens E |
title |
Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
title_short |
Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
title_full |
Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
title_fullStr |
Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
title_full_unstemmed |
Calcareous dinoflagellate cycst in the mid-Cenomanian Boreal realm |
title_sort |
calcareous dinoflagellate cycst in the mid-cenomanian boreal realm |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.735804 https://doi.org/10.1594/PANGAEA.735804 |
op_coverage |
MEDIAN LATITUDE: 50.524050 * MEDIAN LONGITUDE: -2.984650 * SOUTH-BOUND LATITUDE: 48.516000 * WEST-BOUND LONGITUDE: -13.438700 * NORTH-BOUND LATITUDE: 54.594200 * EAST-BOUND LONGITUDE: 13.418800 * DATE/TIME START: 1981-06-30T00:00:00 * DATE/TIME END: 1981-06-30T00:00:00 |
long_lat |
ENVELOPE(-13.438700,13.418800,54.594200,48.516000) |
genre |
Fennoscandia North Atlantic |
genre_facet |
Fennoscandia North Atlantic |
op_source |
Supplement to: Wendler, Jens E; Gräfe, Kai-Uwe; Willems, Helmut (2002): Palaeoecology of calcareous dinoflagellate cysts in the mid-Cenomanian Boreal Realm - Implications for the reconstruction of palaeoceanography of the NW European shelf sea. Cretaceous Research, 23, 213-229, https://doi.org/10.1006/cres.2002.0311 |
op_relation |
Wendler, Jens E (2001): Reconstruction of astronomically-forced cyclic and abrupt paleoecological changes in the upper cretaceous boreal realm based on calcareous dinoflagellate cysts. Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen, 183, 149 pp, urn:nbn:de:gbv:46-diss000001986 https://doi.pangaea.de/10.1594/PANGAEA.735804 https://doi.org/10.1594/PANGAEA.735804 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.735804 https://doi.org/10.1006/cres.2002.0311 |
_version_ |
1765997599370772480 |