Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 542228
Title Embolism resistance drives the distribution of Amazonian rainforest tree species along hydro-topographic gradients
Author(s) Oliveira, Rafael S.; Costa, Flavia R.C.; Baalen, Emma van; Jonge, Arjen de; Bittencourt, Paulo R.; Almanza, Yanina; V. Barros, Fernanda de; Cordoba, Edher C.; Fagundes, Marina V.; Garcia, Sabrina; Guimaraes, Zilza T.T.M.; Hertel, Mariana; Schietti, Juliana; Rodrigues-Souza, Jefferson; Poorter, Lourens
Source New Phytologist (2018). - ISSN 0028-646X - 9 p.
DOI https://doi.org/10.1111/nph.15463
Department(s) PE&RC
Forest Ecology and Forest Management
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) drought vulnerability - forest resilience - functional ecology - hydrological niches - P - phosphorus - tropical forests - water table
Abstract

Species distribution is strongly driven by local and global gradients in water availability but the underlying mechanisms are not clear. Vulnerability to xylem embolism (P50) is a key trait that indicates how species cope with drought and might explain plant distribution patterns across environmental gradients. Here we address its role on species sorting along a hydro-topographical gradient in a central Amazonian rainforest and examine its variance at the community scale. We measured P50 for 28 tree species, soil properties and estimated the hydrological niche of each species using an indicator of distance to the water table (HAND). We found a large hydraulic diversity, covering as much as 44% of the global angiosperm variation in P50. We show that P50: contributes to species segregation across a hydro-topographic gradient in the Amazon, and thus to species coexistence; is the result of repeated evolutionary adaptation within closely related taxa; is associated with species tolerance to P-poor soils, suggesting the evolution of a stress-tolerance syndrome to nutrients and drought; and is higher for trees in the valleys than uplands. The large observed hydraulic diversity and its association with topography has important implications for modelling and predicting forest and species resilience to climate change.

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