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Larval outbreaks in West Greenland: Instant and subsequent effects on tundra ecosystem productivity and CO sub(2) exchange
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Larval outbreaks in West Greenland: Instant and subsequent effects on tundra ecosystem productivity and CO sub(2) exchange
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Journal Article
Larval outbreaks in West Greenland: Instant and subsequent effects on tundra ecosystem productivity and CO sub(2) exchange
2017
Overview
Insect outbreaks can have important consequences for tundra ecosystems. In this study, we synthesise available information on outbreaks of larvae of the noctuid moth Eurois occulta in Greenland. Based on an extensive dataset from a monitoring programme in Kobbefjord, West Greenland, we demonstrate effects of a larval outbreak in 2011 on vegetation productivity and CO sub(2) exchange. We estimate a decreased carbon (C) sink strength in the order of 118-143 g C m super(-2), corresponding to 1210-1470 tonnes C at the Kobbefjord catchment scale. The decreased C sink was, however, counteracted the following years by increased primary production, probably facilitated by the larval outbreak increasing nutrient turnover rates. Furthermore, we demonstrate for the first time in tundra ecosystems, the potential for using remote sensing to detect and map insect outbreak events.
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