Cryptogamic soil buds in the equatorial Andes of Venezuela

Francisco L. Pérez

Permafrost and Periglacial Processes, 1996, vol. 7, issue 3, 229-255

Abstract: Soil buds, formed by particle heaving and sorting by needle ice, were studied in a high Andean paramo. Soils were finer in buds than in adjacent trough areas, where pebbles had been concentrated by lateral sorting. Some buds were composed only of mineral grains, others were covered by a cryptogamic crust of liverworts (Marsupella spp.) or mosses (Grimmia longirostris). Particle sorting was studied by comparing the grain‐size distributions of buds and troughs, and by using a numerical sorting index. Degree of sorting varied widely among bare bud sites, where it was dependent on the presence of gravel in the substrate. Sorting was pronounced in sites with cryptogamic plants, where fines (

Date: 1996
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https://doi.org/10.1002/(SICI)1099-1530(199609)7:33.0.CO;2-7

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Persistent link: https://EconPapers.repec.org/RePEc:wly:perpro:v:7:y:1996:i:3:p:229-255

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