Early Maastrichtian benthos of the chalk at Kronsmoor, northern Germany: implications for Late Cretaceous environmental change
Early Maastrichtian benthos of the chalk at Kronsmoor, northern Germany: implications for Late Cretaceous environmental change
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德国北部克朗斯莫尔的早期马斯特里赫特白垩底栖生物:对白垩纪晚期环境变化的影响
DOI:
10.1007/s12549-017-0283-2
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发表时间:
2017
影响因子:
1.4
通讯作者:
Wilmsen
中科院分区:
文献类型:
--
作者:
Engelke;Linnert;Mutterlose;Wilmsen
Lower Maastrichtian strata (Belemnella obtusaand lower–middleBelemnella sumensiscephalopod biozones) at the Saturn quarry near Kronsmoor (northern Germany) were logged and sampled in detail (33 bulk samples of about 6 kg each) for high-resolution quantitative palaeoecological analysis of the benthic fauna. Following standardised preparation, the size fractions 500 μm–1 mm and >1 mm were considered, documenting a diverse benthic assemblage of bryozoans, brachiopods, bivalves, various echinoid taxa, asteroids, ophiuroids, crinoids, sponges, small-sized sabellids and serpulids, cirripedes and foraminifera. A general, gradual up-section increase in the abundance of benthic faunas was recognised. Furthermore, from the lower to the upper part of the section, epifaunal suspension feeders became more dominant as the mobile guilds (epifaunal and shallow infaunal) saw a reduction in numbers. These observations parallel results obtained from low-resolution macrofossil analyses of this interval that documented an impoverished lower and a rich upper assemblage, the latter clearly dominated by epifaunal suspension feeders. Palaeoecological data of benthic community relicts at Kronsmoor are indicative of increased nutrient availability during the early Maastrichtian. However, in the absence of any evidence of increased productivity in the overlying photic zone (calcareous nannofossil data), a lateral input (upwelling) of nutrient-rich waters onto the shelf to fuel the benthic ecosystem has to be considered. This view is supported by records of contemporaneous changes in latest Cretaceous ocean circulation that followed the latest Campanian cooling event, inclusive of a southward spread of waters of intermediate depth from high latitudes.
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影响因子:
2.7
作者:
B. Lauridsen;A. Gale;F. Surlyk
通讯作者:
B. Lauridsen;A. Gale;F. Surlyk
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
Joellen Russell;Andrew G. Dickson
通讯作者:
Andrew G. Dickson
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
T. Suga;L. Talley
通讯作者:
L. Talley
DOI:
--
发表时间:
1969
期刊:
影响因子:
--
作者:
H. Mccammon
通讯作者:
H. Mccammon
影响因子:
1.5
作者:
F. Fürsich
通讯作者:
F. Fürsich