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1. Phenological matching rather than genetic variation in host preference underlies geographical variation in host plants used by orange tip butterflies

Author:
Gotthard, Karl,   et al.   ; Stålhandske, Sandra; Olofsson, Martin; Ehrlén, Johan; Wiklund, Christer; Leimar, Olof;     Show all 6 Authors
Source:
Biological journal of the Linnean Society 2016 v.119 no.4 pp. 1060-1067
ISSN:
0024-4066
Subject:
butterflies; females; genetic variation; geographical variation; host plants; host preferences; larvae; oviposition; phenology; Sweden; United Kingdom
Abstract:
... An insect species that shows variation in host species association across its geographical range may do so either because of local adaptation in host plant preference of the insect or through environmentally or genetically induced differences in the plants, causing variation in host plant suitability between regions. In the present study, we experimentally investigate the host plant preference of ...
DOI:
10.1111/bij.12838

2. Variation in plant thermal reaction norms along a latitudinal gradient – more than adaptation to season length

Author:
Gotthard, Karl,   et al.   ; Toftegaard, Tenna; Posledovich, Diana; Navarro‐Cano, José A.; Wiklund, Christer; Ehrlén, Johan;     Show all 6 Authors
Source:
Oikos 2016 v.125 no.5 pp. 622-628
ISSN:
0030-1299
Subject:
Brassicaceae; flowering; global warming; growing season; herbivores; phenotypic plasticity; temperature
Abstract:
... Little is known about the extent to which observed phenological responses to changes in climate are the result of phenotypic plasticity or genetic changes. We also know little about how plasticity, in terms of thermal reaction norms, vary spatially. We investigated if the thermal reaction norms for flower development of five crucifer species (Brassicaceae) differed among three regions along a sout ...
DOI:
10.1111/oik.02323

3. Towards a mechanistic understanding of insect life history evolution: oxygen‐dependent induction of moulting explains moulting sizes

Author:
Gotthard, Karl,   et al.   ; Kivelä, Sami M.; Friberg, Magne; Wiklund, Christer; Leimar, Olof;     Show all 5 Authors
Source:
Biological journal of the Linnean Society 2016 v.117 no.3 pp. 586-600
ISSN:
0024-4066
Subject:
butterflies; evolution; growth models; insect growth; insect larvae; life history; mechanistic models; molting; oxygen; prediction; respiratory system
Abstract:
... Moults characterise insect growth trajectories, typically following a consistent pattern known as Dyar's rule; proportional size increments remain constant across inter‐instar moults. Empirical work suggests that oxygen limitation triggers moulting. The insect respiratory system, and its oxygen supply capacity, grows primarily at moults. It is hypothesized that the oxygen demand increases with inc ...
DOI:
10.1111/bij.12689