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  • 1
    In: IAWA Journal, Brill, Vol. 44, No. 2 ( 2023-06-21), p. 225-252
    Abstract: Rosewood and palisander ( Dalbergia L.f., Fabaceae) are sources of highly valuable tropical timber and include species threatened by habitat degradation and selective logging for national and international trade. Law enforcement depends on reliable and cost-effective species-level identification of timber along the supply chain. The potential of wood anatomy to distinguish between species has not yet been systematically investigated for Dalbergia species from Madagascar. We assessed 36 qualitative and eight quantitative wood anatomical features in 16 Malagasy Dalbergia species that form medium-sized to large trees, representing each species by at least five individuals. We integrated and contrasted the newly collected data with existing data from InsideWood and two previous studies. Principal component analysis of 93 individuals and 29 variables resulted in non-overlapping hulls for eight species with respect to the first two dimensions. Four quantitative features (number of ray tiers per millimetre, number of rays per millimetre, vessel density, and vessel element length) and two qualitative features (scanty paratracheal axial parenchyma and irregular to absent storied structure) were found to be potentially diagnostic to distinguish three single species and three pairs of closely related species. Following our analyses, we provide a provisional microscopic wood anatomical identification key for the 16 Dalbergia species, which can be applied to both logs and sawn wood.
    Type of Medium: Online Resource
    ISSN: 0928-1541 , 2294-1932
    Language: Unknown
    Publisher: Brill
    Publication Date: 2023
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
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  • 2
    In: IAWA Journal, Brill, Vol. 43, No. 1-2 ( 2022-04-04), p. 116-135
    Abstract: Diospyros L. (Ebenaceae) is an important source of ebony, a precious wood used for several economically important timber products. Species are overexploited in many regions, including Madagascar, for both the national and international trade, but little is known about their wood anatomy, despite its importance for forensic identification. Wood anatomy has a major role to play in ensuring the sustainable and equitable utilization of Diospyros species that are not threatened by extinction, and in law enforcement to protect threatened species from illegal logging. This study aims to identify, describe, and test the usefulness of anatomical features to support a taxonomic revision of the genus in Madagascar and to enrich databases for wood identification. Ninety-nine wood specimens were collected from the various bio-geographical regions of Madagascar, representing 15 endemic species (twelve previously described and three new) of large trees (reaching DBH ⩾ 20 cm and/or height ⩾ 20 m) were investigated. Standard methods for wood anatomical studies were used. Statistical analysis of the data using Factorial Analysis on Mixed Data was performed for 14 wood anatomical characters. Detailed descriptions and comparisons of the wood anatomy of the 15 species are provided, along with a wood identification key. Analyses showed that all the characters are highly significant ( ) in the separation of the species studies.
    Type of Medium: Online Resource
    ISSN: 0928-1541 , 2294-1932
    Language: Unknown
    Publisher: Brill
    Publication Date: 2022
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
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  • 3
    In: IAWA Journal, Brill, Vol. 41, No. 4 ( 2020-11-12), p. 720-739
    Abstract: Alerce ( Fitzroya cupressoides (Mol.) Johnst.) and Guaitecas cypress ( Pilgerodendron uviferum (Don) Florin) are two of the three closely-related species of conifers in the Cupressaceae that are endemic to southern Chile and Argentina. Both are listed in Appendix I of the Convention on International Trade in Endangered Species of Fauna and Flora (CITES). The presence or absence of nodular (conspicuously pitted) end walls in the parenchyma cells provide good diagnostic characters to separate the two species wood anatomically, but the latter is sometimes difficult to distinguish. Therefore, a collaborative project was designed to study the chemical-molecular expression of these species by analyzing the heartwood using DART TOFMS (Direct Analysis in Real-Time (DART) Time-of-Flight Mass Spectrometry (TOFMS). This study compares the anatomical features of heartwood for both species and demonstrates that anatomy in conjunction with chemistry can separate them. DART TOFMS analysis combined with PCA was able to unequivocally determine taxonomic source with a statistical certainty of 99%. The mass spectra results obtained from heartwood demonstrated that identification is feasible after a few seconds, using a very small sample. DART TOFMS is a robust tool for reliable species identification and is useful to identify the taxonomic source of finished products or timber that are suspected of being illegally harvested.
    Type of Medium: Online Resource
    ISSN: 0928-1541 , 2294-1932
    Language: Unknown
    Publisher: Brill
    Publication Date: 2020
    SSG: 12
    SSG: 23
    Location Call Number Limitation Availability
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