Development of forest structure on cleared rainforest land in eastern Australia under different styles of reforestation

Kanowski, J., Catterall, C. P., Wardell-Johnson, G. W., Proctor, H. and Reis, T. (2003) Development of forest structure on cleared rainforest land in eastern Australia under different styles of reforestation. Forest Ecology And Management, 183 1-3: 265-280. doi:10.1016/S0378-1127(03)00109-9


Author Kanowski, J.
Catterall, C. P.
Wardell-Johnson, G. W.
Proctor, H.
Reis, T.
Title Development of forest structure on cleared rainforest land in eastern Australia under different styles of reforestation
Journal name Forest Ecology And Management   Check publisher's open access policy
ISSN 0378-1127
Publication date 2003-09-15
Sub-type Article (original research)
DOI 10.1016/S0378-1127(03)00109-9
Volume 183
Issue 1-3
Start page 265
End page 280
Total pages 16
Editor R. Fisher
Place of publication Amsterdam
Publisher Elsevier Scientific Publishing Co
Collection year 2003
Language eng
Subject C1
300604 Management and Environment
770707 Rehabilitation/reafforestation
Abstract Rainforests in eastern Australia have been extensively cleared over the past two centuries. In recent decades, there have been increasing efforts to reforest some of these cleared lands, using a variety of methods, to meet a range of economic and environmental objectives. However, the extent to which the various styles of reforestation restore structure, composition and ecological function to cleared land is not presently understood. In this study, we develop and apply a method for quantifying the structural attributes of reforestation sites in tropical and subtropical Australia. The types of reforestation studied were plantation monocultures, mixed-species cabinet timber plots, diverse restoration plantings and unmanaged regrowth. Two age classes of reforestation were examined: 'young' (5-22 years), incorporating sites from all categories, and 'old' (30-70 years), in which only monoculture plantations and regrowth were represented. A total of 104 sites were surveyed including reference sites in intact rainforest and pasture. Intact rainforest was characterised by a suite of complex structural features including abundant special life forms (vines, epiphytes, hemi-epiphytes and strangler figs), a dense stand of trees in a range of size classes, a closed canopy, a shrubby understorey and a well-developed ground layer of leaf litter and woody debris. These features were lost on conversion to pasture. While all types of reforestation returned some elements of structural complexity to cleared land, young plantation monocultures, cabinet timber plots and young regrowth had a relatively simple structure. These sites typically had a low density of woody stems, a relatively open canopy and grassy ground cover, and lacked large trees, coarse woody debris and most special life forms. Restoration plantings and old regrowth were more complex, with a high density of woody stems, a relatively closed canopy and shrubby understorey. Old monoculture plantations in the tropics had acquired many of the structural attributes of intact forest, however this was not the case in the subtropics, where plantations were subject to more intensive management. The marked differences in structural complexity between sites suggest that the different types of reforestation practiced in eastern Australia are likely to vary considerably in their value as habitat for rainforest biota. (C) 2003 Elsevier Science B.V. All rights reserved.
Keyword Forestry
Mixed-species Plantation
Monoculture Plantation
Restoration Planting
Secondary Forest
Structural Complexity
North Queensland
Abandoned Pastures
Species Richness
Tree Plantations
Tropical Forests
Restoration
Regeneration
Vegetation
Diversity
Biodiversity
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 02:25:38 EST