What was the nature and role of Normapolles angiosperms? A case study from the earliest Cenozoic of Eastern Europe

What was the nature and role of Normapolles angiosperms? A case study from the earliest Cenozoic of Eastern Europe
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Normapolles 被子植物的性质和作用是什么?

DOI:
10.1016/j.palaeo.2014.10.014
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发表时间:
2015
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
通讯作者:
Daly R
Daly R
中科院分区:
--
文献类型:
--
作者:
Daly R

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Normapoles是一种灭绝的早期被子植物,在白垩纪统治着北半球的大部分地区。虽然它们是早期被子植物辐射的产物,但它们持续存在于K-PG边界之外,在乌克兰Boltysh陨石坑发现的最早的古新世孢粉组合中占有相当大的比例。虽然许多形式很可能代表了现代Fagales的祖先血统,特别是核桃科(Juglandaceae),但某些物种的明显趋势表明,它们之间存在着与温度有关的不同生态偏好。在Boltysh记录中,最丰富的类群优先出现在大年早期的高温时期,表明环境是温暖的。与它们与现代亲缘关系的花粉相联系,这表明它们是灌木丛生的硬叶植物,类似于今天在冬季潮湿的生态系统中茁壮成长的植物。在大成早期过热恢复期间和之后,这些物种衰退,并被不同类型取而代之。Boltysh的记录表明,在最早的新生代,Normapoles是一个比通常所描述的更具弹性和复杂性的群体,也是潜在的重要古生态指标。
The Normapolles were an extinct group of early angiosperms which dominated much of the northern hemisphere during the Cretaceous. Although a product of early angiosperm radiation, they persisted beyond the K–Pg boundary, representing a significant proportion of the earliest Palaeocene palynological assemblage recovered from the Boltysh meteorite crater in Ukraine. While it is likely that many forms represent an ancestral lineage to modern day Fagales, particularly the walnut family (Juglandaceae), clear trends in certain species indicate that separate ecological preferences relating to temperature existed amongst them. In the Boltysh record the most abundant taxa occur preferentially within the early Danian hyperthermal, indicating a warm environment. Allied to their co-association with pollen of modern affinity, this suggests that they were scrubby, sclerophyllous plants akin to those which thrive in winter-wet ecosystems today. During and subsequent to the recovery from the early Danian hyperthermal these species decline and are replaced by different types. The Boltysh record demonstrates that in the very earliest Cenozoic, the Normapolles were a considerably more resilient and complex group than they are often portrayed and potentially important palaeoecological indicators.
晚白垩世-古近纪花卉历史和地层学的孢粉学研究
DOI: --
发表时间: 1967
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