Larval outbreaks in West Greenland: instant and subsequent effects on tundra ecosystem productivity and CO2 exchange

Magnus Lund; Katrine Raundrup; Andreas Westergaard-Nielsen; Efrén López-Blanco; Josephine Nymand; Peter Aastrup

doi:10.1007/s13280-016-0863-9

Larval outbreaks in West Greenland: instant and subsequent effects on tundra ecosystem productivity and CO₂ exchange

Magnus Lund^*, Katrine Raundrup, Andreas Westergaard-Nielsen, Efrén López-Blanco, Josephine Nymand, Peter Aastrup

^*Corresponding author af dette arbejde

LUKKET: Geografi

28 Citationer (Scopus)

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Abstract

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 CO₂ exchange. We estimate a decreased carbon (C) sink strength in the order of 118–143 g C m⁻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.

Originalsprog	Engelsk
Tidsskrift	Ambio
Vol/bind	46
Udgave nummer	Suppl. 1
Sider (fra-til)	26-38
Antal sider	13
ISSN	0044-7447
DOI	https://doi.org/10.1007/s13280-016-0863-9
Status	Udgivet - 2017

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10.1007/s13280-016-0863-9

Larval outbreaks in West Greenland Instant and subsequent effects on tundra ecosystem productivity and CO2 exchangeForlagets udgivne version, 2,21 MB

Citationsformater

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title = "Larval outbreaks in West Greenland: instant and subsequent effects on tundra ecosystem productivity and CO2 exchange",

abstract = "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 CO2 exchange. We estimate a decreased carbon (C) sink strength in the order of 118–143 g C m−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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T1 - Larval outbreaks in West Greenland

T2 - instant and subsequent effects on tundra ecosystem productivity and CO2 exchange

AU - Lund, Magnus

AU - Raundrup, Katrine

AU - Westergaard-Nielsen, Andreas

AU - López-Blanco, Efrén

AU - Nymand, Josephine

AU - Aastrup, Peter

N1 - CENPERMOA[2017]

PY - 2017

Y1 - 2017

N2 - 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 CO2 exchange. We estimate a decreased carbon (C) sink strength in the order of 118–143 g C m−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.

AB - 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 CO2 exchange. We estimate a decreased carbon (C) sink strength in the order of 118–143 g C m−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.

KW - Arctic

KW - Carbon

KW - Disturbance

KW - Ecosystem productivity

KW - Eurois occulta

KW - Insect outbreak

U2 - 10.1007/s13280-016-0863-9

DO - 10.1007/s13280-016-0863-9

M3 - Journal article

C2 - 28116687

AN - SCOPUS:85010301120

SN - 0044-7447

VL - 46

SP - 26

EP - 38

JO - Ambio

JF - Ambio

IS - Suppl. 1

ER -

Larval outbreaks in West Greenland: instant and subsequent effects on tundra ecosystem productivity and CO2 exchange

Abstract

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Larval outbreaks in West Greenland: instant and subsequent effects on tundra ecosystem productivity and CO₂ exchange