Comparative analysis of anatomy and micro-densitometry of the growth rings of hardwoods and conifers, with emphasis on dendrochronology

Albuquerque, Álisson Rangel; Castro, Vinícius Resende de; Lobão, Moisés Silveira; Sarto, Camila; Filho, Mário Tomazello; Guedes, Fernanda

doi:10.18671/scifor.v44n111.06

Cited by 7 publications

(8 citation statements)

References 34 publications

(57 reference statements)

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“…The marked boundary between annual growth rings observed in this species is typical of some genera with diffuse porous wood, and could be formed by marginal parenchyma cells [5] or delimited by a fibrous zone [63]. Because of the visible red stained, thick-walled cells, observed at the growth ring boundary, L. azorica seems to have ring boundaries delimited by radially flattened latewood fibers, also present in other Laurus species [63,64]. However, those fibers show a peculiar affinity for Astrablue, what could indicate the presence of polysaccharides residues from the cell wall, such as cellulose and pectins [65].…”

Section: Growth Ring Anatomymentioning

confidence: 78%

“…As a hardwood species, L. azorica xylem vessels show very evident pits in tangential section, which allows for water transport between individual vessels. Reddish cells, identified in several cross-sections, randomly distributed in the xylem, could correspond to tylosis with simple piths or oil cells associated with rays, since both structures have been observed in Laurus [63,64].…”

Section: Growth Ring Anatomymentioning

confidence: 93%

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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: Growth Ring Anatomymentioning

confidence: 78%

Section: Growth Ring Anatomymentioning

confidence: 93%

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

Matos

Silva

Camarinho

et al. 2019

Forests

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“…Hymenaea sp. taxa manifest periodicity of cambial growth, this particularity has a great interest in dendroecological studies (Albuquerque et al 2016, Barbosa et al 2018). The deciduous Cedrela sp.…”

Section: Resultsmentioning

confidence: 99%

Anatomical Identification of Tropical Woods Traded in Lavras, Brazil

Duarte¹,

Borges²,

Ferreira³

et al. 2021

JTFS

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Anatomical characterisation of wood plays an important role in the recognition and confirmation of identity of commercially important timbers. Hence, the objective of the present study is to establish macroscopic identity of tropical wood species commercialised in Lavras, city of Minas Gerais/Brazil, and to verify whether the commercial names given to these species differentiate them from other wood species studied. Wood planks were obtained from commercial timber industries in Lavras region. The samples were passed through identification screening, anatomical characterisation, commercial nomenclatural analysis and visual comparison between the samples collected with available reference materials. According to the results, the trade nomenclature used for lumber industry was in agreement with the literature, except for the taxon Goupia glabra (Goupiaceae), and its common name Perobinha should be replaced by Cupiuba. Evaluation of several features affirmed that the axial parenchyma patterns, the vessel porosity and the presence of storied rays were essential to distinguish families, tribes and typical forest species of the Brazilian flora. Based on the results it was concluded that wood anatomy is an effective mechanism in the identification of commercial timbers, including endangered taxa such as Cedrela (Meliaceae).

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“…As camadas de crescimento são consideradas, portanto, indicadores ambientais das alterações ecológicas naturais e antrópicas (TOMAZELLO-FILHO; BOTOSSO; LISI, 2001). A dendrocronologia é a ciência que possibilita a determinação da idade das árvores com precisão, e a avaliação da dinâmica do crescimento secundário do tronco, através da delimitação dos anéis de crescimento (FRITTS, 1976;KAENNEL;SCHWEINGRUBER, 1995;LISI, 2001;ALBUQUERQUE et al, 2016). Entretanto, há apenas algumas décadas vem sendo desenvolvida nos trópicos, devido a periodicidade mais complexa desenvolvida pelas espécies nativas tropicais (SILVA; FUNCH, SILVA, 2019).…”

Section: Introductionunclassified

“…Para estudos dendrocronológicos, a densidade do lenho é uma das análises mais utilizadas, por ser uma propriedade física e básica, resultado da integração das suas propriedades anatômicas e químicas, onde avalia-se a sua qualidade e destaca a estratégia ecológica das plantas (ZIEMINSKA et al, 2013;KNAPIC et al, 2014;OLIVEIRA et al, 2017, DE MIL et al, 2018. Devido a anatomia do lenho de cada espécie ocorre uma variação de densidade na seção transversal do lenho do tronco intra-anualmente, e assim, registra os limites dos anéis de crescimento em função do tipo de tecido formado (TOMAZELLO-FILHO et al, 2008;ALBUQUERQUE et al, 2016;MIL et al, 2018). Essa variação pode ser mensurada pela microdensitometria de raios X, técnica que permite a leitura da densidade aparente em intervalos micrométricos (POLGE, 1966;TOMAZELLO-FILHO et al, 2008;MIL et al, 2018).…”

Section: Introductionunclassified

Dendrocronologia em árvores de espécies de restauração florestal

Gil¹

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Comparative analysis of anatomy and micro-densitometry of the growth rings of hardwoods and conifers, with emphasis on dendrochronology

Cited by 7 publications

References 34 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

Anatomical Identification of Tropical Woods Traded in Lavras, Brazil

Dendrocronologia em árvores de espécies de restauração florestal

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