DOI: 10.1016/j.foreco.2017.06.027
Scopus记录号: 2-s2.0-85021363955
论文题名: Tree age determination in the widespread woody plant invader Pittosporum undulatum
作者: Borges Silva L. ; Teixeira A. ; Alves M. ; Elias R.B. ; Silva L.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 400 起始页码: 457
结束页码: 467
语种: 英语
英文关键词: Azores
; Growth rate
; Pittosporum undulatum
; Plant invaders
; Rotation period
; Tree age
; Tree growth rings
Scopus关键词: Biomass
; Ecology
; Growth rate
; Azores
; Pittosporum undulatum
; Plant invaders
; Rotation period
; Tree age
; Tree growth
; Forestry
; Pittosporaceae
; Pittosporum undulatum
英文摘要: Pittosporum undulatum Ventenat (Pittosporaceae) is an invasive tree of forests and woodlands in several regions of the world. In the Azores archipelago it occupies about 30% of the forested areas and efforts to valorize its biomass are underway. Implementing sustainable forest management requires basic information on tree age and growth rate, yet this information was lacking. We used tree-ring analysis to obtain accurate age estimates and growth rates from a total of 982 live trees (1318 samples: 646 increment cores and 336 pairs of stem discs) that were sampled in São Miguel, Terceira and Graciosa islands. Pittosporum undulatum showed distinct annual growth rings with an increase in cell-wall thickness and a decrease in cell lumen of the Fibers, from early to latewood. We found trees with ages at base and at breast height ranging from 5/4 to 131/108 years, respectively. Samples taken at tree base and at breast height allowed to estimate a diameter growth rate of 0.38 cm.year−1, with an average of 8 years needed to attain breast height, and a rotation period of 26 years to reach the average diameter of 7 cm presently found at the stands. Allometric equations relating tree age and diameter at breast height, tree height, basal area and biomass were found to be significant. Among the models with lowest AIC, equations predicting tree age from diameter at breast height or from biomass showed the best fit (R2 = 0.65 and for R2 = 0.70, respectively). The developed methods and the obtained results can now be used to support management of biomass valorization projects but also to better understand invasion dynamics at conservation devoted areas. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64238
Appears in Collections: 影响、适应和脆弱性
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作者单位: InBIO, Rede de Investigação em Biodiversidade e Biologia Evolutiva, Laboratório Associado, CIBIO-Açores, Universidade dos Açores, Apartado 1422, 9501-801 Ponta Delgada, Portugal; CEO NATURALREASON, Lda, Caminho do Meio Velho, 5-B, 9760-114 Cabo da PraiaAçores, Portugal; CBIO, Faculdade de Ciências e Tecnologia, Universidade dos Açores, Ponta Delgada, Portugal; CE3C – Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group and Universidade dos Açores, Faculdade de Ciências Agrárias e do Ambiente, 9700-042 Angra do HeroísmoAçores, Portugal
Recommended Citation:
Borges Silva L.,Teixeira A.,Alves M.,et al. Tree age determination in the widespread woody plant invader Pittosporum undulatum[J]. Forest Ecology and Management,2017-01-01,400