Millennium-scale volcanic impact on a superhumid and pristine ecosystem.

Kilian, R., Biester, H., Behrmann, Jan Hinrich , Baeza, O., Fesq-Martin, M., Hohner, M., Schimpf, D., Friedmann, A. and Mangini, A. (2006) Millennium-scale volcanic impact on a superhumid and pristine ecosystem. Geology, 34 (8). pp. 609-612. DOI 10.1130/G22605.1.

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Ecosystems damaged by distal volcanic ash and sulfur deposition usually recover within decades. However, sediment, stalagmite, and pollen records from the southernmost Andes indicate a 2000 yr impact on forest and aquatic ecosystems after deposition of a thin tephra layer. SO2 released from altering pumice produced intense soil and lake acidification in a >150,000 km2 area. Acidification led to nutrient leaching and affected soil microorganisms, causing plant decay and increased soil erosion in an area larger than 8000 km2. We conclude that weakly buffered soils in humid environments are extremely vulnerable to volcanic and anthropogenic acidification, causing long-lasting ecosystem damage and perturbations of paleoclimate proxy records.

Document Type: Article
Keywords: volcanic impact, acidification, ecosystem
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1130/G22605.1
ISSN: 0091-7613
Date Deposited: 03 Dec 2008 16:50
Last Modified: 04 Aug 2017 06:25

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