DOI: 10.1016/j.foreco.2015.10.031
Scopus记录号: 2-s2.0-84991600697
论文题名: Variability in allometric relationships for temperate woodland Eucalyptus trees
作者: Taylor J.E. ; Ellis M.V. ; Rayner L. ; Ross K.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 360 起始页码: 122
结束页码: 132
语种: 英语
英文关键词: Allometry
; Competition
; Coppicing
; Morphology
; Remnant vegetation
; Senescence
Scopus关键词: Agriculture
; Biology
; Competition
; Ecosystems
; Morphology
; Vegetation
; Agricultural landscapes
; Allometric relationship
; Allometry
; Coppicing
; Critically endangered
; Diameter-at-breast heights
; Eucalyptus camaldulensis
; Senescence
; Forestry
; Eucalyptus
; Eucalyptus camaldulensis
; Eucalyptus melliodora
; Eucalyptus microcarpa
; Eucalyptus populnea
英文摘要: Essential to effective vegetation management and habitat conservation is an understanding of tree and stand structure. However, such data for Australian Eucalyptus woodlands come mostly from forestry research and tend to be restricted to production forest types, and merchantable stems and species. We aimed to improve understanding of allometric relationships and stand dynamics for temperate Eucalyptus from critically endangered temperate woodlands. We explored relationships among tree height, diameter at breast height (DBH), crown width, crown senescence, and vegetation density. We measured 3748 naturally-occurring trees on 105 one-hectare sites in remnant vegetation in an agricultural landscape in semi-arid eastern Australia. Four species accounted for 94% of trees measured: Eucalyptus camaldulensis Dehnh. (river red gum), E. melliodora A.Cunn. ex Schauer (yellow box), E. microcarpa Maiden (grey box) and E. populnea F.Muell. subsp. bimbil L.A.S.Johnson & K.D.Hill (poplar box). Six Eucalyptus species were present in relatively low numbers. At about 15 cm DBH, growth changed from being directed primarily at height gain to increasing relative crown width. Trees with DBH ⩾ 15 cm showed large and increasing variation in shape with increasing DBH, and tree dimensions varied among species. For a given DBH, yellow box were taller with relatively narrow crowns than poplar box, and river red gum and grey box intermediate to these two species. Human manipulation of the agricultural landscapes has impacted on these allometric relationships. Past attempts by people to kill trees has resulted in frequent coppicing, with up to 13 trunks. Up to 50% of trees of each species (mean 29%) had multiple stems and multi-stemmed trees had relatively broader crowns than single-stemmed trees. Similarly, decreasing vegetation density by tree removal generally resulted in shorter trees with wider canopies for any DBH. Progression through crown development and senescence was similar among species except that it occurred at different trunk sizes for different species. The variability of allometric relationships within temperate Eucalyptus species, combined with their variable growth rates, makes it difficult to accurately predict outcomes of current land management decisions in terms of vegetation structure and biological habitat attributes. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65163
Appears in Collections: 影响、适应和脆弱性
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作者单位: School of Science, Australian Catholic University, PO Box 968, North SydneyNSW, Australia; Population Analysis and Modelling Unit, Science Section, Office of Environment and Heritage NSW, PO Box 1967, Hurstville BCNSW, Australia; The Fenner School of Environment and Society, Australian National University, Canberra, ACT, Australia
Recommended Citation:
Taylor J.E.,Ellis M.V.,Rayner L.,et al. Variability in allometric relationships for temperate woodland Eucalyptus trees[J]. Forest Ecology and Management,2016-01-01,360