干旱区生态环境知识资源中心(Arid): Soil formation and mineralogical changes on basaltic lava vs scoria along a hydroclimatic gradient on Santa Cruz Island, Galapagos

Arid

DOI	10.1016/j.catena.2022.106696
	Soil formation and mineralogical changes on basaltic lava vs scoria along a hydroclimatic gradient on Santa Cruz Island, Galapagos
	Candra, I. Nyoman; Gerzabek, Martin H.; Ottner, Franz; Wriessnig, Karin; Tintner, Johannes; Schmidt, Greta; Rampazzo, Nicola; Zehetner, Franz
通讯作者	Zehetner, F
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	220
英文摘要	Climate and parent material type are important soil forming factors. On Santa Cruz Island, Galapagos, the climate shows a pronounced altitudinal zonation from arid lowlands to humid highlands, and the volcanic parent materials, although chemically rather uniform (basaltic), show pronounced differences in porosity, including dense lava flows and very vesicular scoria deposits. In this study, the effect of these two driving factors on pedogenesis was investigated. Our results show that pH and effective cation exchange capacity (CECeff) decreased, but po-tential cation exchange capacity (CECpot), phosphate retention, and Al-o +1/2Fe(o) as well as Al-p/Al-o increased with increasing elevation regardless of parent material type. Conversely, topsoil bulk density (BD) and organic carbon (OC) content did not show a clear altitudinal pattern on lava but decreased (BD) or increased (OC) with increasing elevation on scoria. Clay mineralogy changed from minor (2:1-type) mixed layer phases in the low-elevation arid zone to vermiculitic (lava) or kaolinitic mineralogy (scoria) at mid-elevation (humid), whereas short-range-order (SRO) minerals (allophane and ferrihydrite) dominated in the colloidal fraction of both lava -and scoria-derived soils under very humid conditions at high elevation. The sequence of soil types developed on lava was, with increasing elevation, Cambisol -> Phaeozem -> Andosol, while on scoria it was Regosol -> Umbrisol -> Andosol. Our results show that climate is the overriding factor controlling the major mineralogical and pedogenic changes in the studied environment; however, the higher porosity of the scoria parent materials considerably accelerated weathering and pedogenic processes compared to the denser lavas. Our study highlights the importance of the parent material's physical nature in modulating rates of chemical weathering and pedogenesis.
英文关键词	Andisol Mineralogy Soil classification Soil genesis Volcanic ash soils
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000929576600003
WOS关键词	VOLCANIC ASH SOILS ; ORGANIC-CARBON ; CLAY-MINERALS ; CLIMATIC GRADIENT ; GEOCHEMISTRY ; HALLOYSITE ; ALLOPHANE ; IMOGOLITE ; STORAGE ; TEPHRA
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395655
推荐引用方式 GB/T 7714	Candra, I. Nyoman,Gerzabek, Martin H.,Ottner, Franz,et al. Soil formation and mineralogical changes on basaltic lava vs scoria along a hydroclimatic gradient on Santa Cruz Island, Galapagos[J],2023,220.
APA	Candra, I. Nyoman.,Gerzabek, Martin H..,Ottner, Franz.,Wriessnig, Karin.,Tintner, Johannes.,...&Zehetner, Franz.(2023).Soil formation and mineralogical changes on basaltic lava vs scoria along a hydroclimatic gradient on Santa Cruz Island, Galapagos.CATENA,220.
MLA	Candra, I. Nyoman,et al."Soil formation and mineralogical changes on basaltic lava vs scoria along a hydroclimatic gradient on Santa Cruz Island, Galapagos".CATENA 220(2023).