Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

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dc.catalogadorgrr
dc.contributor.authorGrigusova, Paulina
dc.contributor.authorLarsen, Annegret
dc.contributor.authorBrandl, Roland
dc.contributor.authorRío López, Camilo del
dc.contributor.authorFarwig, Nina
dc.contributor.authorKraus, Diana
dc.contributor.authorPaulino, Leandro
dc.contributor.authorPliscoff, Patricio
dc.contributor.authorBendix, Joerg
dc.date.accessioned2023-10-10T20:21:15Z
dc.date.available2023-10-10T20:21:15Z
dc.date.issued2023
dc.description.abstractAnimal burrowing activity affects soil texture, bulk density, soil water content, and redistribution of nutrients. All of these parameters in turn influence sediment redistribution, which shapes the earth's surface. Hence it is important to include bioturbation into hillslope sediment transport models. However, the inclusion of burrowing animals into hillslope-wide models has thus far been limited and has largely omitted vertebrate bioturbators, which can be major agents of bioturbation, especially in drier areas.Here, we included vertebrate bioturbator burrows into a semi-empirical Morgan-Morgan-Finney soil erosion model to allow a general approach to the assessment of the impacts of bioturbation on sediment redistribution within four sites along the Chilean climate gradient. For this, we predicted the distribution of burrows by applying machine learning techniques in combination with remotely sensed data in the hillslope catchment. Then, we adjusted the spatial model parameters at predicted burrow locations based on field and laboratory measurements. We validated the model using field sediment fences. We estimated the impact of bioturbator burrows on surface processes. Lastly, we analyzed how the impact of bioturbation on sediment redistribution depends on the burrow structure, climate, topography, and adjacent vegetation.Including bioturbation greatly increased model performance and demonstrates the overall importance of vertebrate bioturbators in enhancing both sediment erosion and accumulation along hillslopes, though this impact is clearly staggered according to climatic conditions. Burrowing vertebrates increased sediment accumulation by 137.8 % +/- 16.4 % in the arid zone (3.53 kg ha(-1) yr(-1) vs. 48.79 kg ha(-1) yr(-1)), sediment erosion by 6.5 % +/- 0.7 % in the semi-arid zone (129.16 kg ha(-1) yr(-1) vs. 122.05 kg ha(-1) yr(-1)), and sediment erosion by 15.6 % +/- 0.3 % in the Mediterranean zone (4602.69 kg ha(-1) yr(-1) vs. 3980.96 kg ha(-1) yr(-1)). Bioturbating animals seem to play only a negligible role in the humid zone. Within all climate zones, bioturbation did not uniformly increase erosion or accumulation within the whole hillslope catchment. This depended on adjusting environmental parameters. Bioturbation increased erosion with increasing slope, sink connectivity, and topography ruggedness and decreasing vegetation cover and soil wetness. Bioturbation increased sediment accumulation with increasing surface roughness, soil wetness, and vegetation cover.
dc.fuente.origenWOS
dc.identifier.doi10.5194/bg-20-3367-2023
dc.identifier.eissn1726-4189
dc.identifier.issn1726-4170
dc.identifier.urihttps://doi.org/10.5194/bg-20-3367-2023
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/75074
dc.identifier.wosidWOS:001048081700001
dc.information.autorucInstituto de Geografía; Río López, Camilo del; 0000-0002-6817-431X; 17960
dc.information.autorucFacultad de Ciencias Biológicas; Pliscoff, Patricio ; 0000-0002-5971-8880; 1435
dc.issue.numero15
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final3394
dc.pagina.inicio3367
dc.publisherCopernicus Gesellschaft MBH
dc.revistaBiogeosciences
dc.rightsacceso abierto
dc.rights.licenseAtribución 4.0 Internacional (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectSmall-Scale Observation
dc.subjectSoil erosion
dc.subjectBurrowing Activities
dc.subjectSurface-Roughness
dc.subjectCritical zone
dc.subjectPlateau Pika
dc.subjectSimple Model
dc.subjectWater
dc.subjectVegetation
dc.subject.ddc570
dc.subject.deweyBiologíaes_ES
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleMammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient
dc.typeartículo
dc.volumen20
sipa.codpersvinculados17960
sipa.codpersvinculados1435
sipa.indexWOS
sipa.trazabilidadWOS;2023-09-09
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