Variation in vegetation cover and seedling performance of tree species in a forest-savanna ecotone release_rev_8a9d5496-5ec6-4806-9e7f-2b92f927f2d1

by Hamza Issifu, George K. D. Ametsitsi, Lana J. de Vries, Gloria Djaney Djagbletey, Stephen Adu-Bredu, Philippine Vergeer, Frank van Langevelde, Elmar Veenendaal

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abstracts[] {'sha1': '944dcded33cc67d53530602331afb46703dc9383', 'content': '<jats:title>Abstract</jats:title>Differential tree seedling recruitment across forest-savanna ecotones is poorly understood, but hypothesized to be influenced by vegetation cover and associated factors. In a 3-y-long field transplant experiment in the forest-savanna ecotone of Ghana, we assessed performance and root allocation of 864 seedlings for two forest (<jats:italic>Khaya ivorensis</jats:italic> and <jats:italic>Terminalia superba</jats:italic>) and two savanna (<jats:italic>Khaya senegalensis</jats:italic> and <jats:italic>Terminalia macroptera</jats:italic>) species in savanna woodland, closed-woodland and forest. Herbaceous vegetation biomass was significantly higher in savanna woodland (1.0 ± 0.4 kg m<jats:sup>−2</jats:sup> vs 0.2 ± 0.1 kg m<jats:sup>−2</jats:sup> in forest) and hence expected fire intensities, while some soil properties were improved in forest. Regardless, seedling survival declined significantly in the first-year dry-season for all species with huge declines for the forest species (50% vs 6% for <jats:italic>Khaya</jats:italic> and 16% vs 2% for <jats:italic>Terminalia</jats:italic>) by year 2. After 3 y, only savanna species survived in savanna woodland. However, best performance for savanna <jats:italic>Khaya</jats:italic> was in forest, but in savanna woodland for savanna <jats:italic>Terminalia</jats:italic> which also had the highest biomass fraction (0.8 ± 0.1 g g<jats:sup>−1</jats:sup> vs 0.6 ± 0.1 g g<jats:sup>−1</jats:sup> and 0.4 ± 0.1 g g<jats:sup>−1</jats:sup>) and starch concentration (27% ± 10% vs 15% ± 7% and 10% ± 4%) in roots relative to savanna and forest <jats:italic>Khaya</jats:italic> respectively. Our results demonstrate that tree cover variation has species-specific effects on tree seedling recruitment which is related to root storage functions.', 'mimetype': 'application/xml+jats', 'lang': None}
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issue 02
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release_date 2019-01-18
release_stage published
release_type article-journal
release_year 2019
subtitle
title Variation in vegetation cover and seedling performance of tree species in a forest-savanna ecotone
version
volume 35
webcaptures
withdrawn_date
withdrawn_status
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work_id vd52sq4m3rhdlpsj4h4rsta2em
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crossref.subject ['Ecology, Evolution, Behavior and Systematics']
crossref.type journal-article