Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/343045
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Microsite differentiation drives the abundance of soil ammonia oxidizing bacteria along aridity gradients

AutorDelgado-Baquerizo, Manuel CSIC ORCID ; Maestre, Fernando T.; Eldridge, David J.; Singh, Brajesh K.
Fecha de publicaciónabr-2016
EditorFrontiers Media
CitaciónFrontiers in Microbiology 7: 505 (2016)
ResumenSoil ammonia oxidizing bacteria (AOB) and archaea (AOA) are responsible for nitrification in terrestrial ecosystems, and play important roles in ecosystem functioning by modulating the rates of N losses to ground water and the atmosphere. Vascular plants have been shown to modulate the abundance of AOA and AOB in drylands, the largest biome on Earth. Like plants, biotic and abiotic features such as insect nests and biological soil crusts (biocrusts) have unique biogeochemical attributes (e.g., nutrient availability) that may modify the local abundance of AOA and AOB. However, little is known about how these biotic and abiotic features and their interactions modulate the abundance of AOA and AOB in drylands. Here, we evaluate the abundance of amoA genes from AOB and AOA within six microsites commonly found in drylands (open areas, biocrusts, ant nests, grasses, nitrogen-fixing shrubs, and trees) at 21 sites from eastern Australia, including arid and mesic ecosystems that are threatened by predicted increases in aridity. Our results from structural equation modeling suggest that soil microsite differentiation alters the abundance of AOB (but not AOA) in both arid and mesic ecosystems. While the abundance of AOA sharply increased with increasing aridity in all microsites, the response of AOB abundance was microsite-dependent, with increases (nitrogen-fixing shrubs, ant nests), decreases (open areas) or no changes (grasses, biocrusts, trees) in abundance with increasing aridity. Microsites supporting the highest abundance of AOB were trees, nitrogen-fixing shrubs, and ant nests. These results are linked to particular soil characteristics (e.g., total carbon and ammonium) under these microsites. Our findings advance our understanding of key drivers of functionally important microbial communities and N availability in highly heterogeneous ecosystems such as drylands, which may be obscured when different soil microsites are not explicitly considered.
Descripción12 páginas.- 5 figuras.- referencias.- The Supplementary Material for this article can be found online at: http://journal.frontiersin.org/article/10.3389/fpls.2016.00990
Versión del editorhttp://hdl.handle.net/10.3389/fpls.2016.00990
URIhttp://hdl.handle.net/10261/343045
DOI10.3389/fmicb.2016.00505
E-ISSN1664-302X
Aparece en las colecciones: (IRNAS) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
fmicb-07-00505.pdf1,48 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

PubMed Central
Citations

7
checked on 03-may-2024

SCOPUSTM   
Citations

23
checked on 11-may-2024

WEB OF SCIENCETM
Citations

18
checked on 22-feb-2024

Page view(s)

11
checked on 16-may-2024

Download(s)

4
checked on 16-may-2024

Google ScholarTM

Check

Altmetric

Altmetric


Artículos relacionados:


Este item está licenciado bajo una Licencia Creative Commons Creative Commons