Tree age determination in the widespread woody plant invader Pittosporum undulatum

Silva, Lurdes Borges; Teixeira, Andréia; Alves, Maria Judite; Elias, Rui B.

doi:10.1016/j.foreco.2017.06.027

Cited by 12 publications

(20 citation statements)

References 63 publications

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“…The Azores archipelago, situated in the north Atlantic Ocean (36 • 55 -39 • 43 N and 25 • 00 -31 • 15 W), is composed of three island groups: Eastern (Santa Maria and São Miguel islands), Central (Terceira, Pico, Faial, São Jorge and Graciosa islands) and Western (Flores and Corvo islands). This study was carried out in São Miguel (Figure 1), the largest island, with 745 km 2 , a coastline length with 213 km and the highest peak at 1105 m [31]. age-size relationships and growth rate estimates, using models that relate dendrometric traits with tree age.…”

Section: Study Areamentioning

confidence: 99%

“…The Azores archipelago, situated in the north Atlantic Ocean (36°55′-39°43′ N and 25°00′-31°15′ W), is composed of three island groups: Eastern (Santa Maria and São Miguel islands), Central (Terceira, Pico, Faial, São Jorge and Graciosa islands) and Western (Flores and Corvo islands). This study was carried out in São Miguel (Figure 1), the largest island, with 745 km 2 , a coastline length with 213 km and the highest peak at 1105 m [31]. While there is a variation in the climatic conditions from one extreme of the archipelago to the other, and a significant altitudinal variation within each island, the Azorean climate might be classified as wet mesothermic with oceanic traits, low thermal amplitude and a mean annual temperature of 17 °C at sea level.…”

Section: Study Areamentioning

confidence: 99%

“…Samples were allowed to air-dry in wood supports for at least one week [2], and were mounted on wood supports with glue. Sample surface preparation was carried out by polishing with sandpaper of increasing gradation [50]-100, 180, 220, 320, 400 and 600.…”

Section: Wood Sample Preparation For Macroscopic Analysismentioning

confidence: 99%

“…Models relating tree age with other dendrometric variables (e.g., diameter at breast height, tree height, crown diameter, crown volume, leaf area) are available for different species and different geographic areas [54,55], including the Azores [2]. In our study, allometric equations were used to relate tree age, as derived by tree ring counts, with diameter at breast height, tree height and basal area.…”

Section: Relationship Between Tree Age and Dendrometric Traitsmentioning

confidence: 99%

“…Knowledge on tree growth rate and age-size relationships is the basis for understanding tree population dynamics and evaluating changes in both natural and managed forests, being crucial for sustainable forest restoration [1][2][3][4]. Dendrochronology techniques are commonly used in forest management to determine woody plant growth rates in seasonal climates [2,5,6]. Accurate tree age estimates are critical to a range of forest and ecological studies [7], for which a standard identification of the earlywood-latewood boundary is necessary [8].…”

Section: Introductionmentioning

confidence: 99%

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Linking Dendrometry and Dendrochronology in the Dominant Azorean Tree Laurus azorica (Seub.) Franco

Matos

Silva

Camarinho

et al. 2019

Forests

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As in many archipelagos, the Azorean primary forest was largely cleared and replaced by secondary forest and grassland, the Azorean tree Laurus azorica (Seub.) Franco being one of the dominant trees in the remaining natural forests. Dendrochronological and dendrometric studies in the Azores mainly focused on non-indigenous trees, either used for timber (e.g., Cryptomeria japonica D. Don) or considered as invasive (Pittosporum undulatum Vent.). Therefore, this study aims to describe the growth ring anatomy of L. azorica, and to understand the relationship between dendrometric traits (e.g., trunk diameter at breast height; tree height), and the number of growth rings. Growth ring anatomy was accessed by wood anatomical preparation of microcore samples while tree age estimation was based on growth ring counts in wood cores taken at breast height and at base. A total of 145 trees were sampled, resulting in 262 increment cores, at six representative stands of laurel forest in São Miguel Island (Azores). The wood anatomical analysis confirmed the presence of clear annual ring boundaries, and a high structural similarity towards Laurus novocanariensis Rivas Mart., Lousã, Fern.Prieto, E.Días, J.C.Costa & C.Aguiar. Age at tree base averaged 33 years, with 60% of the trees between 25 and 50 years old, and only about 15% above 50 years old. This suggests the existence of a secondary forest that is more recent than expected, probably due to human disturbance. The allometric models showed best fit when calculated by stand, suggesting the effect of local environmental conditions on growth rate. Radial growth rate was estimated at 0.68 cm.year−1. Given the known dominance of this species and the threats affecting natural forests, this baseline study will allow a better understanding of forest distribution and dynamics, and support a more effective forest management approach.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Wood Sample Preparation For Macroscopic Analysismentioning

confidence: 99%

Section: Relationship Between Tree Age and Dendrometric Traitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Linking Dendrometry and Dendrochronology in the Dominant Azorean Tree Laurus azorica (Seub.) Franco

Matos

Silva

Camarinho

et al. 2019

Forests

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Work-in-Progress: Prognostics in Arboriculture Using Computer Vision and Statistical Analysis

Sourabh

Hegde

Velugula

2019

Lecture Notes in Networks and Systems

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Endemic trees in a tropical biodiversity hotspot imperilled by an invasive tree

Bellingham

Tanner

Martin

et al. 2018

Biological Conservation

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; phone +64 3 321 9611 Running head: Tree invasion reduces native tree diversity and richness. Highlights:  A non-native tree, Pittosporum undulatum, is invading Jamaican montane rain forests  Its invasion accelerated after an intense hurricane in 1988 and has not slowed since  Local-scale tree species richness and diversity declines the more it invades  The percentage of stems of trees endemic to Jamaica declines the more it invades  A programme of control and removal is needed now to prevent further declines

show abstract

Tree age determination in the widespread woody plant invader Pittosporum undulatum

Cited by 12 publications

References 63 publications

Linking Dendrometry and Dendrochronology in the Dominant Azorean Tree Laurus azorica (Seub.) Franco

Linking Dendrometry and Dendrochronology in the Dominant Azorean Tree Laurus azorica (Seub.) Franco

Work-in-Progress: Prognostics in Arboriculture Using Computer Vision and Statistical Analysis

Endemic trees in a tropical biodiversity hotspot imperilled by an invasive tree

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