Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution

The flowering plants that dominate modern vegetation possess leaf gas exchange potentials that far exceed those of all other living or extinct plants. The great divide in maximal ability to exchange CO 2 for water between leaves of nonangiosperms and angiosperms forms the mechanistic foundation for...

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Detalles Bibliográficos
Autores principales: Feild, Taylor S., Brodribb, Timothy J., Iglesias, Ari, Chatelet, David S., Baresch, Andres, Upchurch Jr., Garland R., Gomez, Bernard, Mohr, Barbara A. R., Coiffard, Clement, Kvacek, Jiri, Jaramillo, Carlos
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Naturales
Angiosperm evolution
Plant evolution
Transpiration
Tropical rainforest
Venation
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84076
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84076
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Angiosperm evolution
Plant evolution
Transpiration
Tropical rainforest
Venation
spellingShingle Ciencias Naturales
Angiosperm evolution
Plant evolution
Transpiration
Tropical rainforest
Venation
Feild, Taylor S.
Brodribb, Timothy J.
Iglesias, Ari
Chatelet, David S.
Baresch, Andres
Upchurch Jr., Garland R.
Gomez, Bernard
Mohr, Barbara A. R.
Coiffard, Clement
Kvacek, Jiri
Jaramillo, Carlos
Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
topic_facet Ciencias Naturales
Angiosperm evolution
Plant evolution
Transpiration
Tropical rainforest
Venation
description The flowering plants that dominate modern vegetation possess leaf gas exchange potentials that far exceed those of all other living or extinct plants. The great divide in maximal ability to exchange CO 2 for water between leaves of nonangiosperms and angiosperms forms the mechanistic foundation for speculation about how angiosperms drove sweeping ecological and biogeochemical change during the Cretaceous. However, there is no empirical evidence that angiosperms evolved highly photosynthetically active leaves during the Cretaceous. Using vein density (D V ) measurements of fossil angiosperm leaves, we show that the leaf hydraulic capacities of angiosperms escalated severalfold during the Cretaceous. During the first 30 million years of angiosperm leaf evolution, angiosperm leaves exhibited uniformly low vein D V that overlapped the D V range of dominant Early Cretaceous ferns and gymnosperms. Fossil angiosperm vein densities reveal a subsequent biphasic increase in D V . During the first mid-Cretaceous surge, angiosperm D V first surpassed the upper bound of D V limits for nonangiosperms. However, the upper limits of D V typical of modern megathermal rainforest trees first appear during a second wave of increased D V during the Cretaceous-Tertiary transition. Thus, our findings provide fossil evidence for the hypothesis that significant ecosystem change brought about by angiosperms lagged behind the Early Cretaceous taxonomic diversification of angiosperms.
format Articulo
Articulo
author Feild, Taylor S.
Brodribb, Timothy J.
Iglesias, Ari
Chatelet, David S.
Baresch, Andres
Upchurch Jr., Garland R.
Gomez, Bernard
Mohr, Barbara A. R.
Coiffard, Clement
Kvacek, Jiri
Jaramillo, Carlos
author_facet Feild, Taylor S.
Brodribb, Timothy J.
Iglesias, Ari
Chatelet, David S.
Baresch, Andres
Upchurch Jr., Garland R.
Gomez, Bernard
Mohr, Barbara A. R.
Coiffard, Clement
Kvacek, Jiri
Jaramillo, Carlos
author_sort Feild, Taylor S.
title Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
title_short Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
title_full Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
title_fullStr Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
title_full_unstemmed Fossil evidence for Cretaceous escalation in angiosperm leaf vein evolution
title_sort fossil evidence for cretaceous escalation in angiosperm leaf vein evolution
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84076
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