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Abstract:

Decaying logs on the forest oor can act as "nurse logs" for new seedlings, helping with the regeneration of the vegetation. Fossil evidence of this ecological strategy is exceptionally well preserved in the Argentinean Andes, where an ̃300 m.y. old permineralized forest was found at 3000 m elevation in San Juan Province. The fossil trunks, some of them in life position, are intercalated between volcanic rocks and sediments deposited in ooded environments (probably coastal lagoons). More than 100 specimens studied allow us to suggest the dominance of only one tree species in the forest. The rst issue of the research was to determine the means used by the vegetation to survive in such adverse environmental conditions. Fossil evidence supports the hypothesis of regeneration via nurse logs. Little rootlets preserved inside the wood of several specimens indicate that seedlings developed on these logs. Important additional information provided by the fossils is the presence of aerenchymatic tissue in the rootlets. Aerenchyma tissue is a common feature developed in plants living in ooded environments; therefore its recognition in the fossil forest helps in the ecological interpretation. © 2010 Geological Society of America.

Registro:

Documento: Artículo
Título:Nurse logs: An ecological strategy in a late Paleozoic forest from the southern Andean region
Autor:Césari, S.N.; Busquets, P.; Piñol, F.C.; Bedia, I.M.; Limarino, C.O.
Filiación:Museo de Ciencias Naturales B. Rivadavia, Avenida Ángel Gallardo 470, 1405 Buenos Aires, Argentina
Departamento Estratigrafía, Paleontología i Geociències Marines, Facultad Geología, Universitat de Barcelona, C/Martí i Franqués s/n, E-08028 Barcelona, Spain
Departamento de Geología (Paleontología), Facultad de Geología, Universidad de Oviedo, Spain
Departamento de Geología, Ciudad Universitaria, Universidad de Buenos, Pabellón 2, (1428), Aires, Argentina
Palabras clave:Aerenchyma; Andean Region; Coastal lagoons; Common features; Environmental conditions; In-plants; Late Paleozoic; Tree species; Ecology; Nursing; Vegetation; Volcanic rocks; Reforestation; dominance; environmental conditions; fossil assemblage; paleoecology; Paleozoic; regeneration; root system; seedling; Ecology; Plants; Reforestation; Rock; Volcanism; Argentina; San Juan [Argentina]
Año:2010
Volumen:38
Número:4
Página de inicio:295
Página de fin:298
DOI: http://dx.doi.org/10.1130/G30557.1
Título revista:Geology
Título revista abreviado:Geology
ISSN:00917613
CODEN:GLGYB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00917613_v38_n4_p295_Cesari

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Citas:

---------- APA ----------
Césari, S.N., Busquets, P., Piñol, F.C., Bedia, I.M. & Limarino, C.O. (2010) . Nurse logs: An ecological strategy in a late Paleozoic forest from the southern Andean region. Geology, 38(4), 295-298.
http://dx.doi.org/10.1130/G30557.1
---------- CHICAGO ----------
Césari, S.N., Busquets, P., Piñol, F.C., Bedia, I.M., Limarino, C.O. "Nurse logs: An ecological strategy in a late Paleozoic forest from the southern Andean region" . Geology 38, no. 4 (2010) : 295-298.
http://dx.doi.org/10.1130/G30557.1
---------- MLA ----------
Césari, S.N., Busquets, P., Piñol, F.C., Bedia, I.M., Limarino, C.O. "Nurse logs: An ecological strategy in a late Paleozoic forest from the southern Andean region" . Geology, vol. 38, no. 4, 2010, pp. 295-298.
http://dx.doi.org/10.1130/G30557.1
---------- VANCOUVER ----------
Césari, S.N., Busquets, P., Piñol, F.C., Bedia, I.M., Limarino, C.O. Nurse logs: An ecological strategy in a late Paleozoic forest from the southern Andean region. Geology. 2010;38(4):295-298.
http://dx.doi.org/10.1130/G30557.1