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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Fire induced stem death in an African acacia is not caused by canopy scorching
Austral Ecology, Volume 31, No. 7, Year 2006
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Description
The death of smaller stems of trees due to fire is widespread in savannas. There are currently two hypotheses as to how tree stems avoid stem death; by (i) growing tall and enabling the terminal buds to escape being scorched; and (ii) growing a larger stem diameter and thus being buffered against the heat of the fire. Laboratory-based tests of these hypotheses on one savanna tree species, Acacia karroo Haynes, support the contention that the important parameter is stem diameter. In addition, anatomical evidence of heat impacts to xylem suggests that damage to the xylem of a stem may play a mechanistic role in causing stem death. © 2006 Ecological Society of Australia.
Authors & Co-Authors
Balfour, Dave A.
South Africa, Cape Town
University of Cape Town
South Africa, Mtubatuba
Research Centre
South Africa, Grahamstown
South African Environmental Observation Network
Midgley, Jeremy J.
South Africa, Cape Town
University of Cape Town
Statistics
Citations: 76
Authors: 2
Affiliations: 3
Identifiers
Doi:
10.1111/j.1442-9993.2006.01656.x
ISSN:
14429985
e-ISSN:
14429993