Lignin signatures of vegetation and soils in tropical environments

Belanger, E.; Lucotte, M.; Gregoire, B.; Moingt, M.; Paquet, S.; Davidson, R.; Mertens, F.; Passos, C.J.S.; Romana, C.

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자료유형: 학술저널

저자정보: Belanger, E. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Lucotte, M. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Gregoire, B. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Moingt, M. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Paquet, S. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Davidson, R. (GEOTOP-UQAM, Institut des Sciences de I'Environnement) Mertens, F. (Centro de Desenvolvimento Sustentavel, University of Brasilia) Passos, C.J.S. (Faculdade UnB Planaltina - University of Brasilia) Romana, C. (Paris Descartes University-PRES Paris Sorbonne Cite)

저널정보: 테크노프레스 Advances in environmental research Advances in environmental research 제4권 제4호

발행연도: 2015.1

수록면: 247 - 262 (16page)

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The few lignin biomarker studies conducted in tropical environments are hampered by having to use references signatures established for plants and soils characteristic of the temperate zone. This study presents a lignin biomarker analysis (vanillyls (V), p-hydroxyls (P), syringyls (S), cinnamyls (C)) of the dominant plant species and soil horizons as well as an analysis of the interrelated terrigenous organic matter (TOM) dynamics between vegetation and soil of the $Tapaj{\acute{o}}s$ river region, an active colonization front in the Brazilian Amazon. We collected and analyzed samples from 17 fresh dominant plant species and 48 soil cores at three depths (0-5 cm, 20-25 cm, 50-55 cm) from primary rainforest, fallow forest, subsistence agriculture fields and pastures. Lignin signatures in tropical plants clearly distinguish from temperate ones with high ratios of Acid/aldehyde of vanillyls ((Ad/Al)v) and P/V+S. Contrary to temperate environments, similarly high ratios in tropical soils are not related to TOM degradation along with pedogenesis but to direct influence of plants growing on them. Lignin signatures of both plants and soils of primary rainforest and fallow forest clearly distinguish from those of non-forested areas, i.e., agriculture fields and pastures. Attalea speciosa Palm trees, an invasive species in all perturbed landscapes of the Amazon, exhibit lignin signatures clearly distinct from other dominant plant species. The study of lignin signatures in tropical areas thus represents a powerful tool to evaluate the impact of primary rainforest clearing on TOM dynamics in tropical areas.

#Lignin turnover #tropical soils #Amazon basin #land use change #plant material

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