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Global patterns of dust and bedrock nutrient supply to montane ecosystems

A global compilation of erosion rates and modeled dust fluxes shows that dust inputs can be a large fraction of total soil inputs, particularly when erosion is slow and soil residence time is therefore long. These observations suggest that dust-derived nutrients can be vital to montane ecosystems, e...

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Autores principales: Arvin, Lindsay J., Riebe, Clifford S., Aciego, Sarah M., Blakowski, Molly A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5721729/
https://www.ncbi.nlm.nih.gov/pubmed/29226246
http://dx.doi.org/10.1126/sciadv.aao1588
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author Arvin, Lindsay J.
Riebe, Clifford S.
Aciego, Sarah M.
Blakowski, Molly A.
author_facet Arvin, Lindsay J.
Riebe, Clifford S.
Aciego, Sarah M.
Blakowski, Molly A.
author_sort Arvin, Lindsay J.
collection PubMed
description A global compilation of erosion rates and modeled dust fluxes shows that dust inputs can be a large fraction of total soil inputs, particularly when erosion is slow and soil residence time is therefore long. These observations suggest that dust-derived nutrients can be vital to montane ecosystems, even when nutrient supply from bedrock is substantial. We tested this hypothesis using neodymium isotopes as a tracer of mineral phosphorus contributions to vegetation in the Sierra Nevada, California, where rates of erosion and dust deposition are both intermediate within the global compilation. Neodymium isotopes in pine needles, dust, and bedrock show that dust contributes most of the neodymium in vegetation at the site. Together, the global data sets and isotopic tracers confirm the ecological significance of dust in eroding mountain landscapes. This challenges conventional assumptions about dust-derived nutrients, expanding the plausible range of dust-reliant ecosystems to include many temperate montane regions, despite their relatively high rates of erosion and bedrock nutrient supply.
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spelling pubmed-57217292017-12-10 Global patterns of dust and bedrock nutrient supply to montane ecosystems Arvin, Lindsay J. Riebe, Clifford S. Aciego, Sarah M. Blakowski, Molly A. Sci Adv Research Articles A global compilation of erosion rates and modeled dust fluxes shows that dust inputs can be a large fraction of total soil inputs, particularly when erosion is slow and soil residence time is therefore long. These observations suggest that dust-derived nutrients can be vital to montane ecosystems, even when nutrient supply from bedrock is substantial. We tested this hypothesis using neodymium isotopes as a tracer of mineral phosphorus contributions to vegetation in the Sierra Nevada, California, where rates of erosion and dust deposition are both intermediate within the global compilation. Neodymium isotopes in pine needles, dust, and bedrock show that dust contributes most of the neodymium in vegetation at the site. Together, the global data sets and isotopic tracers confirm the ecological significance of dust in eroding mountain landscapes. This challenges conventional assumptions about dust-derived nutrients, expanding the plausible range of dust-reliant ecosystems to include many temperate montane regions, despite their relatively high rates of erosion and bedrock nutrient supply. American Association for the Advancement of Science 2017-12-06 /pmc/articles/PMC5721729/ /pubmed/29226246 http://dx.doi.org/10.1126/sciadv.aao1588 Text en Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Arvin, Lindsay J.
Riebe, Clifford S.
Aciego, Sarah M.
Blakowski, Molly A.
Global patterns of dust and bedrock nutrient supply to montane ecosystems
title Global patterns of dust and bedrock nutrient supply to montane ecosystems
title_full Global patterns of dust and bedrock nutrient supply to montane ecosystems
title_fullStr Global patterns of dust and bedrock nutrient supply to montane ecosystems
title_full_unstemmed Global patterns of dust and bedrock nutrient supply to montane ecosystems
title_short Global patterns of dust and bedrock nutrient supply to montane ecosystems
title_sort global patterns of dust and bedrock nutrient supply to montane ecosystems
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5721729/
https://www.ncbi.nlm.nih.gov/pubmed/29226246
http://dx.doi.org/10.1126/sciadv.aao1588
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