Biomass valorization in the management of woody plant invaders: The case of Pittosporum undulatum in the Azores

Silva, Lurdes Borges; Lourenço, Patrícia; Teixeira, Andréia; Azevedo, Eduardo Brito de; Alves, Maria Judite; Elias, Rui B.

doi:10.1016/j.biombioe.2017.12.025

Cited by 18 publications

(22 citation statements)

References 53 publications

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“…We analyzed model fit for the entire data set and also separately, according to the sampled stands [2,3,54]. When modeling the global data set, regression models explaining tree age based on trunk diameter, basal area, and/or tree height, were of low quality, in contrast with the results previously obtained by Borges Silva et al [2,4] for the invasive tree P. undulatum Vent. in the Azores.…”

Section: Dendrometry and Dendrochronologymentioning

confidence: 92%

“…We followed the general procedures for the calculation of allometric equations that have been previously described [2][3][4], including data logarithmization in order to ensure homocedasticity. We evaluated candidate models using corrected Akaike's Information Criterion (AIC), square root mean error and mean relative error [2][3][4]56]. Statistical analyses were performed using R software, version 3.2.3 [57].…”

Section: Relationship Between Tree Age and Dendrometric Traitsmentioning

confidence: 99%

“…Invasive plants were commonly found at all the sites, the most threatened stands being Sete Cidades and Pinhal da Paz, where P. undulatum Vent. and H. gardnerianum Sheppard ex Ker-Gawl., two top invasive species [4,58] are very abundant; but also in Lombadas, where the latter is also common. Moreover, the area of natural forest on this island has been reduced [12], presently corresponding to small fragmented remains in the western part, and to larger stands in the central and eastern areas, which is reflected in the collected data (see Figure 1).…”

Section: Laurel Forest In São Miguel Islandmentioning

confidence: 99%

“…Although tree growth is the result of very complex processes [69], allometric models can be a robust alternative to predict the growth and the mean age of tree populations [70]. Furthermore, models relating tree age and other dendrometric variables are available for different species and different geographic areas (e.g., [2][3][4]54,55]). We analyzed model fit for the entire data set and also separately, according to the sampled stands [2,3,54].…”

Section: Dendrometry and Dendrochronologymentioning

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].…”

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: Dendrometry and Dendrochronologymentioning

confidence: 92%

Section: Relationship Between Tree Age and Dendrometric Traitsmentioning

confidence: 99%

Section: Laurel Forest In São Miguel Islandmentioning

confidence: 99%

Section: Dendrometry and Dendrochronologymentioning

confidence: 99%

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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Engineered invasive plant cellulose fibers as resources for papermaking

Kapun¹,

Zule²,

Fabjan³

et al. 2022

Eur. J. Wood Prod.

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Microsatellites reveal high levels of genetic admixture in the natural populations of Laurus azorica, Lauraceae

Rego,

Vieira,

Silva

et al. 2024

Plant Syst Evol

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Laurus (Lauraceae) species are currently restricted to isolated refugia in the southern Black Sea, Mediterranean Basin, southern Morocco, and Macaronesian archipelagos. One to three species of Laurus has been recognized: the Azorean endemic Laurus azorica, L. nobilis from the Mediterranean, and L. novocanariensis from Madeira and the Canary Islands. This study aims to determine the population structure, genetic diversity, and associated patterns of gene flow within and between Azorean populations, using eight existing SSR markers. We also included plant material from L. nobilis populations found in the Azores, for comparison. Amplification was performed in 212 samples of L. azorica and in 30 samples of L. nobilis. For L. azorica, 78 alleles were amplified (average 9.75 alleles per loci). Bayesian analysis with STRUCTURE unveiled five genetic groups for the Azorean accessions, with high level of genetic admixture. Genetic diversity was generally high, with moderate levels of genetic differentiation among L. azorica populations. Moreover, high gene flow levels, likely mediated by past human translocations and naturally, by birds, might have contributed to the high level of genetic admixture observed possibly reflecting hybridization events between L. nobilis and L. azorica. Conservation measures should be applied to some populations of São Miguel, Santa Maria, and Flores Islands, based on the number of private alleles, and further, ad hoc translocation events should be avoided. Conservation in situ and the preservation of laurel forest remains are recommended. The study of this species’ taxonomy, genetics, and population dynamics in the Macaronesian region should be continued.

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Biomass valorization in the management of woody plant invaders: The case of Pittosporum undulatum in the Azores

Cited by 18 publications

References 53 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

Engineered invasive plant cellulose fibers as resources for papermaking

Microsatellites reveal high levels of genetic admixture in the natural populations of Laurus azorica, Lauraceae

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