NDLI: Anatomical and physiological regulation of post-fire carbon and water exchange in canopies of two resprouting Eucalyptus species

Content Provider	Springer Nature Link
Author	Turnbull, Tarryn L. Buckley, Thomas N. Barlow, Alexandra M. Adams, Mark A.
Copyright Year	2014
Abstract	The great majority of Eucalyptus spp. are facultative resprouters, and they dominate the eucalypt forests of Australia. Despite this numeric and geographic dominance, there is a general lack of knowledge of their capacity for carbon capture and water loss during canopy reinstation. After a crown-removing fire, we measured leaf-level determinants of carbon and water flux in resprouting canopies of Eucalyptus dives and E. radiata over the 3 years that followed. Leaf anatomy and physiology changed markedly during canopy reinstation, and leaves produced in the second year (2010) were distinct from those produced later. Leaves produced in 2010 were thicker (all measures of leaf anatomy), yet more porous (increased intercellular airspace), causing specific leaf area also to be greater. Indicators of heterotrophic activity, leaf respiration rate and light compensation point, were twofold greater in 2010, whereas all measures of photosynthetic capacity were greatest in leaves produced in 2011 and 2012. Whilst stomatal density, vein density and leaf hydraulic conductance all progressively decreased with time, neither leaf water status nor carbon isotope discrimination were affected. We conclude that canopy reinstation is primarily limited by pre-fire carbon stores, rather than by post-fire edaphic conditions (e.g., water availability), and thus argue that capacity for recovery is directly linked to pre-fire forest health.
Starting Page	333
Ending Page	343
Page Count	11
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	176
Issue Number	2
e-ISSN	14321939
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-10
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Photosynthesis Respiration Heteroblasty Epicormic Vertical gradient Ecology Plant Sciences Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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