Climatic oscillations stall vegetation recovery from K/Pg event devastation
Climatic oscillations stall vegetation recovery from K/Pg event devastation
复制标题
气候振荡阻碍了 K/Pg 事件破坏后的植被恢复
DOI：
10.1144/jgs2012-088
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发表时间：
2013
影响因子：
2.7
通讯作者：
Jolley D
中科院分区：
文献类型：
--
作者：
Jolley D
填充Boltysh陨石坑的沉积岩保存了白垩纪-古近纪（K/Pg）事件后植被破坏和随后的植物重新定植的扩展记录。破坏后的贫瘠地带由蕨类孢子穗接替，记录了最初恢复的植被。蕨类植物孢子穗可分为两个阶段。阶段1的特点是低丰度的蕨类孢子，而其上的阶段2具有高的蕨类孢子丰度，并含有常见的棕榈花粉。将Boltysh第2期蕨类孢子穗与其他孢粉学记录进行比较，发现其与北美西部内陆的K/Pg边界记录具有很强的相似性。Boltysh孢粉植物组成的变化被用来定义在K/Pg边界和丹- c2负碳同位素偏移之间的4个水分有效性循环，周期约为300 kyr。早期K/Pg事件后植被群落的恢复遵循一个常见的几个演替路径，其速率在大型火成岩省中可见，尽管高水分有效性增强了这一路径。第一个真正的沼泽群落的持续演替速度要慢得多。因此，K/Pg事件后植被恢复受到水分有效度缺乏的阻碍，延长了恢复的表观周期。
Sedimentary rocks filling the Boltysh meteorite crater preserve an expanded record of post Cretaceous–Palaeogene (K/Pg) event vegetation destruction and subsequent floral recolonization. A post-destruction barren zone is succeeded by a fern spore spike recording the initial recovery vegetation. The Boltysh fern spore spike is divisible into two phases. Phase 1 is characterized by low abundances of fern spores, whereas the overlying Phase 2 has high fern spore abundances and contains common palm pollen. Comparison of the Boltysh Phase 2 fern spore spike with other palynological records shows strong similarities to the immediately post K/Pg boundary record of the Western Interior, North America. Variation in the composition of the Boltysh palynofloras has been used to define four moisture availability cycles between the K/Pg boundary and the Dan-C2 negative carbon isotope excursion, a period of some 300 kyr. Early post K/Pg event vegetation community recovery followed a common seral successional pathway at rates seen in large igneous provinces, although enhanced by high moisture availability. Continued succession to the first true swamp community was at a considerably slower tempo. The post K/Pg event vegetation recovery was therefore retarded by lack of moisture availability, extending the apparent period of recovery.
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影响因子：
56.9
作者：
ALVAREZ, LW;ALVAREZ, W;MICHEL, HV
通讯作者：
MICHEL, HV
大规模岩浆脉冲驱动植物生态系统动态
影响因子：
2.7
作者：
D. Jolley;S. Passey;M. Hole;John Millett
通讯作者：
John Millett
DOI：
10.1080/01916122.2012.678695
发表时间：
2012-03
期刊：
--
影响因子：
--
作者：
A. Bercovici;V. Vajda;D. Pearson;U. Villanueva-Amadoz;Douglas Kline
通讯作者：
A. Bercovici;V. Vajda;D. Pearson;U. Villanueva-Amadoz;Douglas Kline
影响因子：
56.9
作者：
R. H. Tschudy;C. L. Pillmore;Charles J. Orth;J. S. Gilmore;J. Knight
通讯作者：
R. H. Tschudy;C. L. Pillmore;Charles J. Orth;J. S. Gilmore;J. Knight
美国西部和加拿大白垩纪末期事件的植物微化石记录
DOI：
10.1130/spe247-p445
发表时间：
1990
影响因子：
11.1
作者：
Douglas J. Nichols;R. Fleming
通讯作者：
R. Fleming