The pervasive and multifaceted influence of biocrusts on water in the world's drylands
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Título: | The pervasive and multifaceted influence of biocrusts on water in the world's drylands |
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Autor/es: | Eldridge, David J. | Reed, Sasha | Travers, Samantha K. | Bowker, Matthew A. | Maestre, Fernando T. | Ding, Jingyi | Havrilla, Caroline | Rodriguez‐Caballero, Emilio | Barger, Nichole | Weber, Bettina | Antoninka, Anita | Belnap, Jayne | Chaudhary, V. Bala | Faist, Akasha | Ferrenberg, Scott | Huber‐Sannwald, Elisabeth | Issa, Oumarou Malam | Zhao, Yunge |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ecología | Universidad de Alicante. Instituto Multidisciplinar para el Estudio del Medio "Ramón Margalef" |
Palabras clave: | Biological soil crust | Bryophyte | Cryptogam | Cyanobacteria | Hydrological cycle | Infiltration | Lichen | Sediment production | Soil hydrology | Soil moisture |
Área/s de conocimiento: | Ecología |
Fecha de publicación: | oct-2020 |
Editor: | John Wiley & Sons |
Cita bibliográfica: | Global Change Biology. 2020, 26(10): 6003-6014. https://doi.org/10.1111/gcb.15232 |
Resumen: | The capture and use of water are critically important in drylands, which collectively constitute Earth's largest biome. Drylands will likely experience lower and more unreliable rainfall as climatic conditions change over the next century. Dryland soils support a rich community of microphytic organisms (biocrusts), which are critically important because they regulate the delivery and retention of water. Yet despite their hydrological significance, a global synthesis of their effects on hydrology is lacking. We synthesized 2,997 observations from 109 publications to explore how biocrusts affected five hydrological processes (times to ponding and runoff, early [sorptivity] and final [infiltration] stages of water flow into soil, and the rate or volume of runoff) and two hydrological outcomes (moisture storage, sediment production). We found that increasing biocrust cover reduced the time for water to pond on the surface (−40%) and commence runoff (−33%), and reduced infiltration (−34%) and sediment production (−68%). Greater biocrust cover had no significant effect on sorptivity or runoff rate/amount, but increased moisture storage (+14%). Infiltration declined most (−56%) at fine scales, and moisture storage was greatest (+36%) at large scales. Effects of biocrust type (cyanobacteria, lichen, moss, mixed), soil texture (sand, loam, clay), and climatic zone (arid, semiarid, dry subhumid) were nuanced. Our synthesis provides novel insights into the magnitude, processes, and contexts of biocrust effects in drylands. This information is critical to improve our capacity to manage dwindling dryland water supplies as Earth becomes hotter and drier. |
Patrocinador/es: | This work was conducted as part of the Powell Working Group “Completing the dryland puzzle: creating a predictive framework for biological soil crust function and response to climate change” supported by the John Wesley Powell Center for Analysis and Synthesis, funded by the US Geological Survey. J.B. and S.R. were funded by USGS Ecosystems and Land Use Change Mission Areas, by the US Department of Energy (DESC-0008168), and by the Strategic Environmental Research and Development Program (RC18-1322). J.D. is supported by grants from the Holsworth Wildlife Research Endowment & The Ecological Society of Australia, and a scholarship from China Scholarship Council (No. 201706040073). B.C. is supported by grants from the National Science Foundation (award DEB-1844531) and DePaul University. M.A.B. is supported by a grant from the National Science Foundation (award DEB-1638966). B.W. was supported by the Max Planck Society and a Paul Crutzen Nobel Laureate Fellowship. E.H.-S. was supported by CONACYT grant 251388 B. F.T.M. was supported by the European Research Council (ERC grant agreement 647038 [BIODESERT]) and Generalitat Valenciana (CIDEGENT/2018/041). |
URI: | http://hdl.handle.net/10045/109504 |
ISSN: | 1354-1013 (Print) | 1365-2486 (Online) |
DOI: | 10.1111/gcb.15232 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 John Wiley & Sons Ltd |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1111/gcb.15232 |
Aparece en las colecciones: | Investigaciones financiadas por la UE Personal Investigador sin Adscripción a Grupo INV - DRYLAB - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Eldridge_etal_2020_GlobChangeBiol_final.pdf | Versión final (acceso restringido) | 1,43 MB | Adobe PDF | Abrir Solicitar una copia |
Eldridge_etal_2020_GlobChangeBiol_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,23 MB | Adobe PDF | Abrir Vista previa |
Supp_Material_GCB_June10_2020_checked.docx | Supplementary Material | 306,06 kB | Microsoft Office Word 2007 document | Abrir |
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