Indication of Global Deforestation at the Cretaceous-Tertiary Boundary by New Zealand Fern Spike

  title={Indication of Global Deforestation at the Cretaceous-Tertiary Boundary by New Zealand Fern Spike},
  author={Vivi Vajda and J. Ian Raine and Christopher J. Hollis},
  pages={1700 - 1702}
The devastating effect on terrestrial plant communities of a bolide impact at the Cretaceous-Tertiary boundary is shown in fossil pollen and spore assemblages by a diverse flora being abruptly replaced by one dominated by a few species of fern. Well documented in North America, this fern spike signals widespread deforestation due to an impact winter or massive wildfires. A Southern Hemisphere record of a fern spike, together with a large iridium anomaly, indicates that the devastation was truly… 
Global Effects of the Chicxulub Impact on Terrestrial Vegetation — Review of the Palynological Record from New Zealand Cretaceous/Tertiary Boundary
Analysis of pollen and spore assemblages from both terrestrial and near-shore marine sediments in New Zealand reveal an instant and dramatic mass-kill of the land plants in close association with the
The controversial problem of biotic crises is considered in relation to the Cretaceous - Tertiary and Permian - Triassic transboundary events in the nonmarine sequence of Far East and the Russian
The First Plants to Recolonize Western North America Following the Cretaceous-Paleogene Mass Extinction Event
  • K. Berry
  • Environmental Science
    International Journal of Plant Sciences
  • 2021
Basal polypod ferns can be linked to Cyathidites spores in the northern Great Plains, perhaps because of a latitudinal climatic gradient, and this results could explain taxonomic inversion in the dual-phase fern spore spike between western North America and New Zealand.
The Cretaceous/Tertiary boundary event in New Zealand: Profiling mass extinction
  • C. Hollis
  • Environmental Science, Geography
  • 2003
Abstract Of over 20 known Cretaceous/Tertiary (K/T) boundary sections in the New Zealand region, 6 in the northern South Island were selected for detailed biostratigraphic and paleoenvironmental
Fungi, a Driving Force in Normalization of the Terrestrial Carbon Cycle Following the End-Cretaceous Extinction
  • V. Vajda
  • Environmental Science, Geography
  • 2012
Geologists have long recognized the magnitude, abruptness, and the global pattern of the major biotic turnover across the Cretaceous–Paleogene (K–Pg) boundary approximately 65.5 million years ago. It
The New Zealand fossil record of ferns for the past 85 million years
A database of all published records of fossil ferns from the late Cretaceous onwards is presented, which provides evidence for the time of arrival for fern lineages, continuity of their presence, and times of radiation, thereby greatly assisting the reconstruction of the history and biogeography of f Ferns in the region.
Seed ferns survived the end-Cretaceous mass extinction in Tasmania.
Discovery of this "Lazarus taxon," together with the presence of a range of other relictual fossil and extant organisms in Tasmania, other southern Gondwanan provinces, and some regions of northern North America and Asia, underscores high-latitude regions as biodiversity refugia during global environmental crises and highlights their importance as sources of postextinction radiations.
Cretaceous/Paleogene Floral Turnover in Patagonia: Drop in Diversity, Low Extinction, and a Classopollis Spike
A palynological analysis of a section in Patagonia that shows a marked fall in diversity and abundance of nearly all plant groups across the K/Pg interval, which greatly supports previous hypotheses of high latitude southern regions as biodiversity refugia during the end-Cretaceous global crisis.
Palynofloral patterns of terrestrial ecosystem change during the end-Triassic event – a review
  • S. Lindström
  • Environmental Science, Geography
    Geological Magazine
  • 2015
Abstract A review of the palynofloral succession at the well-documented Triassic–Jurassic boundary sites – Kuhjoch (Austria), St Audrie's Bay (UK), Stenlille (Denmark), Astartekløft (Greenland),


Disruption of the Terrestrial Plant Ecosystem at the Cretaceous-Tertiary Boundary, Western Interior
The palynologically defined Cretaceous-Tertiary boundary in the western interior of North America occurs at the top of an iridium-rich clay layer. The boundary is characterized by the abrupt
Vegetation, climatic and floral changes at the Cretaceous-Tertiary boundary
The western interior of North America has the only known non-marine sections that contain the iridium-rich clay interpreted as the Cretaceous–Tertiary (K–T) boundary1–7. Because vegetation and
End-Cretaceous devastation of terrestrial flora in the boreal Far East
A continuous marine sedimentary sequence spanning the Cretaceous/Tertiary (K/T) boundary has been identified in eastern Hokkaido, Japan, on the basis of planktonic foraminifera. The K/T boundary is
Siliceous plankton bloom in the earliest Tertiary of Marlborough, New Zealand
In marked contrast to mass extinctions and productivity crises in much of the world' oceans at the Cretaceous-Tertiary boundary, siliceous plankton thrived in earliest Paleocene seas of Marlborough,
Ignition of global wildfires at the Cretaceous/Tertiary boundary
It is shown that the thermal radiation produced by the ballistic re-entry of ejecta condensed from the vapour plume of the impact could have increased the global radiation flux by factors of 50 to 150 times the solar input for periods ranging from one to several hours.
Palaeobotanical evidence for a June 'impact winter' at the Cretaceous/Tertiary boundary
A LARGE bolide impact, such as that thought to have occurred at the Cretaceous/Tertiary (K/T) boundary, should produce large amounts of light-attenuating debris, thereby causing an 'impact
Global fire at the Cretaceous– Tertiary boundary
Cretaceous-Tertiary (K-T) boundary clays from five sites in Europe and New Zealand are 102-104-fold enriched in elemental C (mainly soot), which is isotopically uniform and apparently comes from a
Cretaceous Extinctions: Evidence for Wildfires and Search for Meteoritic Material
Clay samples from three Cretaceous-Tertiary boundary sites contain a worldwide layer of soot, suggesting that soot production by large wildfires is about 10 times more efficient that has been assumed for a nuclear winter.
High-resolution leaf-fossil record spanning the Cretaceous/Tertiary boundary
THEORIES that explain the extinctions characterizing the Cretaceous/Tertiary (K/T) boundary1-3 need to be tested by analyses of thoroughly sampled biotas. Palynological studies are the primary means