No evidence for enemy release during range expansion of an evergreen tree in northern Europe
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No evidence for enemy release during range expansion of an evergreen tree in northern Europe. / Skou, Anne-Marie Thonning; Markussen, Bo; Sigsgaard, Lene; Kollmann, Johannes Christian.
I: Environmental Entomology, Bind 40, Nr. 5, 2011, s. 1183-1191.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - No evidence for enemy release during range expansion of an evergreen tree in northern Europe
AU - Skou, Anne-Marie Thonning
AU - Markussen, Bo
AU - Sigsgaard, Lene
AU - Kollmann, Johannes Christian
PY - 2011
Y1 - 2011
N2 - ABSTRACT 1. Plant distributions are dynamic but the role of plantÐinsect interactions in controlling range dynamics is not well understood. Enemy release, for example could facilitate plant range expansion under climate change. 2. We conducted a transplant experiment with the evergreen tree Ilex aquifolium L. in both the historical and the expanding range in Denmark to study possible effects of geographical position, small-scale distance, and plant types on presence and performance of the monophagous insect leaf-miner Phytomyza ilicis Curtis. 3. The leaf miner was present in the entire range of I. aquifolium in Denmark, and there were no differences in emergence success depending on geographical position. Small-scale distance to existing adult plants inßuenced the activity of the insect on the transplants, and oviposition density was negatively correlated with distance to adult plants. 4. Plant type had an effect on leaf miner feeding, oviposition and mining, and the native provenance of I. aquifolium supported higher densities than two cultivars. 5. There was no evidence that enemy release facilitates the current range expansion of I. aquifolium.
AB - ABSTRACT 1. Plant distributions are dynamic but the role of plantÐinsect interactions in controlling range dynamics is not well understood. Enemy release, for example could facilitate plant range expansion under climate change. 2. We conducted a transplant experiment with the evergreen tree Ilex aquifolium L. in both the historical and the expanding range in Denmark to study possible effects of geographical position, small-scale distance, and plant types on presence and performance of the monophagous insect leaf-miner Phytomyza ilicis Curtis. 3. The leaf miner was present in the entire range of I. aquifolium in Denmark, and there were no differences in emergence success depending on geographical position. Small-scale distance to existing adult plants inßuenced the activity of the insect on the transplants, and oviposition density was negatively correlated with distance to adult plants. 4. Plant type had an effect on leaf miner feeding, oviposition and mining, and the native provenance of I. aquifolium supported higher densities than two cultivars. 5. There was no evidence that enemy release facilitates the current range expansion of I. aquifolium.
KW - Former LIFE faculty
KW - holly leaf-miner, Ilex aquifolium, geographical distribution, host-parasitoid system
U2 - 10.1603/EN11063
DO - 10.1603/EN11063
M3 - Journal article
VL - 40
SP - 1183
EP - 1191
JO - Environmental Entomology
JF - Environmental Entomology
SN - 0046-225X
IS - 5
ER -
ID: 35078877