Show simple item record

dc.contributor.authorWright, TE
dc.contributor.authorTausz, M
dc.contributor.authorKasel, S
dc.contributor.authorVolkova, L
dc.contributor.authorMerchant, A
dc.contributor.authorBennett, LT
dc.identifierpii: tps001
dc.identifier.citationWright, T. E., Tausz, M., Kasel, S., Volkova, L., Merchant, A. & Bennett, L. T. (2012). Edge type affects leaf-level water relations and estimated transpiration of Eucalyptus arenacea. TREE PHYSIOLOGY, 32 (3), pp.280-293.
dc.description.abstractWhile edge effects on tree water relations are well described for closed forests, they remain under-examined in more open forest types. Similarly, there has been minimal evaluation of the effects of contrasting land uses on the water relations of open forest types in highly fragmented landscapes. We examined edge effects on the water relations and gas exchange of a dominant tree (Eucalyptus arenacea Marginson & Ladiges) in an open forest type (temperate woodland) of south-eastern Australia. Edge effects in replicate woodlands adjoined by cleared agricultural land (pasture edges) were compared with those adjoined by 7- to 9-year-old eucalypt plantation with a 25m fire break (plantation edges). Consistent with studies in closed forest types, edge effects were pronounced at pasture edges where photosynthesis, transpiration and stomatal conductance were greater for edge trees than interior trees (75m into woodlands), and were related to greater light availability and significantly higher branch water potentials at woodland edges than interiors. Nonetheless, gas exchange values were only ∼50% greater for edge than interior trees, compared with ∼200% previously found in closed forest types. In contrast to woodlands adjoined by pasture, gas exchange in winter was significantly lower for edge than interior trees in woodlands adjoined by plantations, consistent with shading and buffering effects of plantations on edge microclimate. Plantation edge effects were less pronounced in summer, although higher water use efficiency of edge than interior woodland trees indicated possible competition for water between plantation trees and woodland edge trees in the drier months (an effect that might have been more pronounced were there no firebreak between the two land uses). Scaling up of leaf-level water relations to stand transpiration using a Jarvis-type phenomenological model indicated similar differences between edge types. That is, transpiration was greater at pasture than plantation edges in summer months (most likely due to greater water availability at pasture edges), resulting in significantly greater estimates of annual transpiration at pasture than plantation edges (430 vs. 343lm(-2)year(-1), respectively). Our study highlights the need for landscape-level water flux models to account for edge effects on stand transpiration, particularly in highly fragmented landscapes.
dc.titleEdge type affects leaf-level water relations and estimated transpiration of Eucalyptus arenacea
dc.typeJournal Article
melbourne.affiliation.departmentUniversity General
melbourne.affiliation.departmentSchool of Ecosystem and Forest Sciences
melbourne.source.titleTree Physiology: an international botanical journal
melbourne.contributor.authorTausz, Michael
melbourne.contributor.authorKasel, Sabine
melbourne.contributor.authorVolkova, Liubov
melbourne.contributor.authorMerchant, Andrew
melbourne.contributor.authorBennett, Lauren
melbourne.contributor.authorWRIGHT, THOMAS
melbourne.accessrightsThis item is currently not available from this repository

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record