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Disturbance Regimes Drive The Diversity of Regional Floristic Pools Across Guianan Rainforest Landscapes

descriptionPublicationkeyboard_double_arrow_right Article , Conference object , Other literature type , Journal 01 Mar 2018 France Publisher:Springer Science and Business Media LLCJournal:Scientific Reports, volume 8 (eissn: 2045-2322,

Authors: Guitet, Stéphane; Sabatier, Daniel; Brunaux, Olivier; Couteron, Pierre; Denis, Thomas; Freycon, Vincent; Gonzalez, Sophie; +6 Authors

doi: 10.1038/s41598-018-22209-9

pmid: 29497098

pmc: PMC5832822

Disturbance Regimes Drive The Diversity of Regional Floristic Pools Across Guianan Rainforest Landscapes

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Abstract

AbstractDisturbances control rainforest dynamics, and, according to the intermediate disturbance hypothesis (IDH), disturbance regime is a key driver of local diversity. Variations in disturbance regimes and their consequences on regional diversity at broad spatiotemporal scales are still poorly understood. Using multidisciplinary large-scale inventories and LiDAR acquisitions, we developed a robust indicator of disturbance regimes based on the frequency of a few early successional and widely distributed pioneer species. We demonstrate at the landscape scale that tree-species diversity and disturbance regimes vary with climate and relief. Significant relationships between the disturbance indicator, tree-species diversity and soil phosphorus content agree with the hypothesis that rainforest diversity is controlled both by disturbance regimes and long-term ecosystem stability. These effects explain the broad-scale patterns of floristic diversity observed between landscapes. In fact, species-rich forests in highlands, which have benefited from long-term stability combined with a moderate and regular regime of local disturbances, contrast with less diversified forests on recently shaped lowlands, which have undergone more recent changes and irregular dynamics. These results suggest that taking the current disturbance regime into account and including geomorphological stratifications in climate-vegetation models may be an effective way to improve the prediction of changes in species diversity under climate change.

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France

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Keywords

Time Factors, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Forests, [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, Facteur climatique, Trees, Soil, K01 - Foresterie - Considérations générales, [SDV.EE.ECO] Life Sciences [q-bio]/Ecology, environment/Ecosystems, Forêt tropicale humide, Altitude, Inventaire forestier, Flore, Phylogenetics and taxonomy, Biodiversity, [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics, Tropical ecology, Facteur édaphique, French Guiana, [SDE]Environmental Sciences, Forêt, Biodiversité, Guyana, Seasons, environment/Ecosystems, Géomorphologie, inventaire forestier continu, 570, Conservation of Natural Resources, Rainforest, P40 - Météorologie et climatologie, Pluviométrie, Télédétection, Climate Change, Models, Biological, 333, Article, [SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics, Phylogenetics and taxonomy, F70 - Taxonomie végétale et phyto-géographie, Ecosystem, écosystème forestier, 580, Tropical Climate, Composition botanique, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Forest ecology, U40 - Méthodes de relevé, agrovoc: agrovoc:c_29572, agrovoc: agrovoc:c_3093, agrovoc: agrovoc:c_7976, agrovoc: agrovoc:c_33949, agrovoc: agrovoc:c_15945, agrovoc: agrovoc:c_29554, agrovoc: agrovoc:c_3233, agrovoc: agrovoc:c_2983, agrovoc: agrovoc:c_316, agrovoc: agrovoc:c_15617, agrovoc: agrovoc:c_24174, agrovoc: agrovoc:c_1374842133961, agrovoc: agrovoc:c_3062, agrovoc: agrovoc:c_6498, agrovoc: agrovoc:c_1374156575504

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	21
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%