干旱区生态环境知识资源中心(Arid): Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient

Arid

DOI	10.5194/bg-20-3367-2023
	Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient
	Grigusova, Paulina; Larsen, Annegret; Brandl, Roland; del Rio, Camilo; Farwig, Nina; Kraus, Diana; Paulino, Leandro; Pliscoff, Patricio; Bendix, Joerg
通讯作者	Grigusova, P
来源期刊	BIOGEOSCIENCES
ISSN	1726-4170
EISSN	1726-4189
出版年	2023
卷号	20 期号:15 页码:3367-3394
英文摘要	Animal 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.
类型	Article
语种	英语
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:001048081700001
WOS关键词	SMALL-SCALE OBSERVATION ; SOIL-EROSION ; BURROWING ACTIVITIES ; SURFACE-ROUGHNESS ; CRITICAL ZONE ; PLATEAU PIKA ; SIMPLE-MODEL ; WATER ; TRANSPORT ; VEGETATION
WOS类目	Ecology ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395548
推荐引用方式 GB/T 7714	Grigusova, Paulina,Larsen, Annegret,Brandl, Roland,et al. Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient[J],2023,20(15):3367-3394.
APA	Grigusova, Paulina.,Larsen, Annegret.,Brandl, Roland.,del Rio, Camilo.,Farwig, Nina.,...&Bendix, Joerg.(2023).Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient.BIOGEOSCIENCES,20(15),3367-3394.
MLA	Grigusova, Paulina,et al."Mammalian bioturbation amplifies rates of both hillslope sediment erosion and accumulation along the Chilean climate gradient".BIOGEOSCIENCES 20.15(2023):3367-3394.