A5080936418- Plant and animal studies
- Hymenoptera taxonomy and phylogeny
- Fossil Insects in Amber
- Marine animal studies overview
- Insect-Plant Interactions and Control
- Ecology and Vegetation Dynamics Studies
- Genetic diversity and population structure
- Parasite Biology and Host Interactions
- Identification and Quantification in Food
- Environmental DNA in Biodiversity Studies
- Lepidoptera: Biology and Taxonomy
- Genomics and Phylogenetic Studies
- Species Distribution and Climate Change
- Forest Insect Ecology and Management
- Mycorrhizal Fungi and Plant Interactions
- Insect symbiosis and bacterial influences
- Plant Diversity and Evolution
- Bat Biology and Ecology Studies
- Insect and Arachnid Ecology and Behavior
- Fish Ecology and Management Studies
- Genetic and phenotypic traits in livestock
- Wildlife Ecology and Conservation
- Forest Ecology and Biodiversity Studies
- Forensic and Genetic Research
- Plant Gene Expression Analysis
Norwegian Institute of Bioeconomy Research
2018-2024
University of Eastern Finland
2012-2021
University of Zurich
2012-2015
Finland University
2012
Joensuu Science Park
2007-2009
University of Bayreuth
2007
Leibniz Centre for Agricultural Landscape Research
2007
University of Oulu
2005-2006
Harvard University
2002
The ability to induce galls on plants has evolved independently in many insect orders, but the adaptive significance and evolutionary consequences of gall induction are still largely unknown. We studied these questions by analyzing concentrations various plant defense compounds willow leaves sawfly galls. found that probably nutritionally beneficial for larvae, because most defensive phenolics substantially lower interiors than leaves. More importantly, changes chemistry occur a similar...
The Hymenoptera constitutes one of the largest, and ecologically economically most important, insect orders. During past decade, a number hypotheses on phylogenetic relationships among hymenopteran families superfamilies have been presented, based analyses molecular and/or morphological data. Nevertheless, many questions still remain, particularly concerning within hyperdiverse suborder Apocrita, but also when it comes to evolutionary history ancestrally herbivorous "sawfly" lineages that...
The sawfly genus Euura of the tenthredinid subfamily Nematinae, in which species level taxonomy has long been regarded as controversial, is particularly rich northern parts Holarctic. Among a majority with more or less free-living larvae, sizeable minority belongs to monophyletic lineage whose larvae complete their whole development galls. We present illustrated keys adults and galls 66 gall-inducing that occur, might Europe. distribution these briefly reviewed, an emphasis on fauna Sweden,...
Biogeography has traditionally focused on the spatial distribution and abundance of species. Both are driven by way species interact with one another, but only recently community ecologists realized need to document their temporal variation. Here, we call for an integrated approach, adopting view that structure is best represented as a network ecological interactions, show how it translates biogeography questions. We propose niche should encompass effect environment (the Grinnellian...
The taxonomy and systematics of Salix subgenus s.l. is difficult. reliability evolutionary implications two important morphological characters (number stamens, morphology bud scales) used in subgeneric classification within remain untested, a disjunct Old-New World distribution pattern main clade s.l., revealed by previous study, lacks reasonable explanation. To study these questions, we conducted phylogenetic analyses based on 4,688 bp sequence data from four plastid (rbcL, trnD-T, matK,...
Phylogenomic approaches have recently helped elucidate various insect relationships, but large-scale comprehensive analyses on relationships within sawflies and woodwasps are still lacking. Here, we infer the long-term biogeographic history of these hymenopteran groups using a large dataset 354 UCE loci collected from 385 species that represent all major lineages. Early Hymenoptera started diversifying during Triassic ∼249 Ma spread over ancient supercontinent Pangaea. We recovered Xyeloidea...
Ecological speciation is a process in which transiently resource-polymorphic species divides into two specialized sister lineages as result of divergent selection pressures caused by the use multiple niches or environments. Ecology-based has been studied intensively plant-feeding insects, both sympatric and allopatric shifts onto novel host plants could speed up diversification. However, while numerous examples pairs likely to have originated resource found, overall importance ecological...
Abstract.— There are over 200 species of nematine sawflies that induce galls on willows (Salix spp.). Most the monoor oligophagous, and they can be separated into seven or eight different groups based type gall induce. We studied evolution types host plant associations by reconstructing phylogeny five outgroup 31 ingroup using DNA sequence data from mitochondrial cytochrome b gene. Maximum-parsimony maximum-likelihood analyses resulted in essentially same with high support for important...
Ecology Letters (2012) Abstract The origin of species‐rich insect–plant food webs has traditionally been explained by diversifying antagonistic coevolution between plant defences and herbivore counter‐defences. However, recent studies combining paleoclimatic reconstructions with time‐calibrated phylogenies suggest that variation in global climate determines the distribution, abundance diversity clades and, hence, indirectly influences balance speciation extinction associated groups. Extant...
Recent phylogenetic studies on Nematinae based DNA sequences have shown extensive incongruencies with current nomenclature of genus-group taxa. Here, we expand previous sequence datasets three genes (CoI, Cytb, and EF-1α), to include a fourth (NaK) more genera. The analyses largely confirm the findings, particularly existence two well-supported large clades, Euura Pristiphora, together comprising than 75% species Nematinae. Basal relationships within these clades remain poorly resolved,...
Abstract The ‘Symphyta’ is a paraphyletic assemblage at the base of order Hymenoptera, comprising 14 families and about 8750 species. All have phytophagous larvae, except for Orussidae, which are parasitoids. This study presents evaluates results DNA barcoding approximately 5360 specimens ‘Symphyta’, mainly adults, 4362 sequences covering 1037 species were deemed suitable quality inclusion in analysis. extant represented, Anaxyelidae. majority from Europe, but 38% 13% non‐European origin....
Abstract Adaptive radiations consist of two intertwined processes, diversification species and their ecological niches, but it is unclear whether there a causal link between the processes. In phytophagous insects, mainly involves shifts in host-plant associations larval feeding habits (internal or external) on different plant parts, several observations indicate that speciation facilitated by host shifts. Data use individual suggest internal feeders are less likely to colonize new hosts than...
Abstract Nematinae is one of the largest subfamilies in sawfly family Tenthredinidae, but internal relationships are unknown absence any formal phylogenetic analysis. To understand phylogeny Nematinae, we sequenced a portion mitochondrial cytochrome oxidase I gene and nuclear elongation factor‐1α from thirteen outgroup taxa sixty‐eight nematine species, ingroup which represent all major genera subgenera within subfamily. Maximum parsimony Bayesian analyses DNA sequence data show that: (1)...
Plants, plant-feeding insects, and insect parasitoids form some of the most complex species-rich food webs. According to classic escape-and-radiate (EAR) hypothesis, these hyperdiverse communities result from coevolutionary arms races consisting successive cycles enemy escape, radiation, colonization by new lineages. It has also been suggested that "enemy-free space" provided novel host plants could promote shifts herbivores, similarly drive diversification gall in insects induce galls on...
Small, genetically uniform populations may face an elevated risk of extinction due to reduced environmental adaptability and individual fitness. Fragmentation can intensify these genetic adversities and, therefore, dispersal gene flow among subpopulations within isolated population is often essential for maintaining its viability. Using microsatellite mtDNA data, we examined diversity, spatial differentiation, interregional flow, effective sizes in the critically endangered Saimaa ringed...
Abstract The insect order Hymenoptera originated during the Permian nearly 300 Mya. Ancestrally herbivorous hymenopteran lineages today make up paraphyletic suborder ‘Symphyta’, which encompasses c. 8200 species with very diverse host-plant associations. We use phylogeny-based statistical analyses to explore drivers of diversity dynamics within a particular focus on hypothesis that diversification insects has been driven by explosive radiation angiosperms and after Cretaceous. Our...
Island populations are on average smaller, genetically less diverse, and at a higher risk to go extinct than mainland populations. Low genetic diversity may elevate extinction probability, but the component of can be affected by mode loss, which, in turn, is connected demographic history population. Here, we examined erosion three Fennoscandian ringed seal subspecies, which one inhabits Baltic Sea 'mainland' two 'aquatic islands' composed Lake Saimaa Finland Ladoga Russia. Both lakes were...