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von Suchodoletz, Hans ; Glaser, Bruno ; Thrippleton, Timothy ; Broder, Tanja ; Zang, Ulrich ; Eigenmann, Rafael ; Kopp, Benjamin ; Reichert, Martin ; Zöller, Ludwig:
The influence of Saharan dust deposits on La Palma soil properties (Canary Islands, Spain).
In: Catena.
Bd. 103
(2013)
.
- S. 44-52.
ISSN 0341-8162
DOI: https://doi.org/10.1016/j.catena.2011.07.005
Abstract
The significance of Saharandustdeposits for ecosystems has been demonstrated in several studies, showing its influence on pedogenesis and soil chemical and physical parameters by the addition of nutrient elements. This contribution is especially important for volcanic soils poor in plant-available phosphorous as those of the island of LaPalma (Canary Islands, Spain). Thus, this study investigates the spatial distribution of Saharandust on the island, and determines its influence on soil properties and thus on the ecosystem of the island. Since silt-sized quartz is not autochthonously formed on the island, it served as a reliable indicator for Saharandust. Quartz was identified and quantified using X-ray diffractometry. The influence of Saharandust additions on soil properties was assessed by texture analyses and analyses of plant-available phosphorous, an element strongly limiting plant-growth on the island due to its fixation in the structure of amorphous volcanic clay. A luff–lee-effect revealed significant influence on dust distribution, whereas small geomorphologic structures as hollows and mounds hardly influenced the dust distribution pattern. A positive correlation of quartz content with the proportion of the grain size fraction 0.5–10 μm demonstrates an influence on soil physical properties, apparently influencing available water capacity. Furthermore, our data suggest an increasing content of plant-available phosphorous with a rising amount of Saharandust in the soils. Thus, the input of Saharandust influences soil fertility of LaPalma and is an important factor regarding the fragility of the LaPalma ecosystems.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Zusätzliche Informationen: | BAYCEER107546 |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Juniorprofessur Biogeographische Modellierung Fakultäten Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik |
| Eingestellt am: | 03 Mai 2015 08:56 |
| Letzte Änderung: | 06 Sep 2023 11:24 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/12627 |