Loading ...
Sorry, an error occurred while loading the content.

Fw: mid-Cretaceous origin of modern tropical rain forests--major paper available

Expand Messages
  • Pat Neuman
    Fw: http://groups.yahoo.com/group/paleo_bio_dinosaur_ontology Date: Tue Mar 1, 2005 6:48 pm Subject: mid-Cretaceous origin of modern tropical rain
    Message 1 of 1 , Mar 1, 2005
    • 0 Attachment
      Fw:
      http://groups.yahoo.com/group/paleo_bio_dinosaur_ontology

      Date: Tue Mar 1, 2005 6:48 pm
      Subject: mid-Cretaceous origin of modern tropical rain forests--major
      paper available

      ADVERTISEMENT
      C.C. Davis, C.O. Webb, K.J. Wurdack, C.A. Jaramillo, M.J. Donoghue,
      2005. Explosive radiation of Malpighiales supports a mid-Cretaceous
      origin of modern tropical rain forests. American Naturalist
      165(3):E36-E65. ABSTRACT: Fossil data have been interpreted as
      indicating that Late Cretaceous tropical forests were open and dry
      adapted and that modern closed-canopy rain forest did not originate
      until after the Cretaceous-Tertiary (K/T) boundary. However, some
      mid-Cretaceous leaf floras have been interpreted as rain forest.
      Molecular divergence-time estimates within the clade Malpighiales,
      which constitute a large percentage of species in the shaded, shrub,
      and small tree layer in tropical rain forests worldwide, provide new
      tests of these hypotheses. We estimate that all 28 major lineages
      (i.e., traditionally recognized families) within this clade originated
      in tropical rain forest well before the Tertiary, mostly during the
      Albian and Cenomanian (11294 Ma). Their rapid rise in the
      mid-Cretaceous may have resulted from the origin of adaptations to
      survive and reproduce under a closed forest canopy. This pattern may
      also be paralleled by other similarly diverse lineages and supports
      fossil indications that closed-canopy tropical rain forests existed
      well before the K/T boundary. This case illustrates that dated
      phylogenies can provide an important new source of evidence bearing on
      the timing of major environmental changes, which may be especially
      useful when fossil evidence is limited or controversial.

      *******************************************

      STEPHAN PICKERING / Chofetz Chayim ben-Avraham
      The Dinosaur Fractals Project
      1840 41st Avenue # 102
      Capitola, California 95010-2527 USAmerika
      stephanpickering@...
      website: http://groups.yahoo.com/group/paleo_bio_dinosaur_ontology
      theropod research summarized: Reference Base, Pickering, at
      <www.dinodata.net>
      IN PROGRESS: Alfred Russel Wallace's KING KONG: the semioptics of
      Willis O'Brien
    Your message has been successfully submitted and would be delivered to recipients shortly.