A5048344174- Ecology and Vegetation Dynamics Studies
- Forest Insect Ecology and Management
- Plant and animal studies
- Insect-Plant Interactions and Control
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Climate change and permafrost
- Entomological Studies and Ecology
- Cryospheric studies and observations
- Viral Infections and Vectors
- Bat Biology and Ecology Studies
- Lepidoptera: Biology and Taxonomy
- Study of Mite Species
- Bird parasitology and diseases
- Invertebrate Taxonomy and Ecology
- Fire effects on ecosystems
- Environmental DNA in Biodiversity Studies
- Insects and Parasite Interactions
- Heavy metals in environment
- Plant Parasitism and Resistance
- Mercury impact and mitigation studies
- Plant biochemistry and biosynthesis
- Arctic and Antarctic ice dynamics
- Research in Social Sciences
- Winter Sports Injuries and Performance
University of Turku
2014-2024
The distribution ranges and spatio‐temporal patterns in the occurrence activity of boreal bats are yet largely unknown due to their cryptic lifestyle lack suitable efficient study methods. We approached issue by establishing a permanent passive‐acoustic sampling setup spanning area Finland gain an understanding on how latitude affects bat species composition northern Europe. recorded calls were semi‐automatically identified for three target taxa; Myotis spp., Eptesicus nilssonii or...
Population cycles of herbivores are thought to be driven by trophic interaction mechanisms, either between food plant and herbivore or the herbivorous prey its natural enemies. Observational data have indicated that hymenopteran parasitoids cause delayed density-dependent mortality in cyclic autumnal moth (Epirrita autumnata) populations. We experimentally tested parasitism hypothesis population establishing a four-year parasitoid-exclusion experiment, with parasitoid-proof exclosures,...
In 2015 a long-term, nationwide tick and tick-borne pathogen (TBP) monitoring project was started by the Finnish Tick Project Research Station network (RESTAT), with goal of producing temporally geographically extensive data regarding exophilic ticks in Finland. current study, we present results from first four years this collaboration. Ticks were collected cloth dragging 11 research stations across Finland May-September 2015-2018 (2012-2018 Seili). Collected screened for twelve different...
Abstract Climatic impacts are especially pronounced in the Arctic, which as a region is warming twice fast rest of globe. Here, we investigate how mean climatic conditions and rates change impact parasitoid insect communities 16 localities across Arctic. We focus on parasitoids widespread habitat, Dryas heathlands, describe community composition terms larval host use (i.e., herbivorous Lepidoptera vs. pollinating Diptera) functional groups differing their closeness associations (koinobionts...
1. The abundance and fecundity-related body size variation of the cyclic autumnal moth Epirrita autumnata were monitored from early increase phase throughout outbreak to end density decline in northernmost Norway during 1999-2006. Another geometrid, winter Operophtera brumata, did not until had its post-peak 2004, was at own peak concurrent with steeply declining 2005-06. 2. variables measured (forewing lengths males females hind femur males) showed a similar density-dependent response, i.e....
Abstract In the literature, various environmental factors are described as being capable of influencing reproductive output insect females irrespective their body size. Still, female size or weight is widely used a proxy for fecundity. present study, seven-year data set on autumnal moth, Epirrita autumnata (Borkhausen) (Lepidoptera: Geometridae), was to analyze whether weight-fecundity relationship in this capital breeding, cyclic forest defoliating lepidopteran constant across years....
Abstract Populations of the autumnal moth, Epirrita autumnata , exhibit cycles with high amplitudes in northernmost Europe, culminating devastating outbreak densities at favourable sites. Parasitism by hymenopteran parasitoids has been hypothesised to operate a delayed density dependence capable producing observed dynamics. It also that insects crowded conditions invest greatly their immunity as counter‐measure increased risk parasitism and pathogen infections. Furthermore, inducible plant...
Birds host several ectoparasitic fly species with negative effects on nestling health and reproductive output, the capability of transmitting avian blood parasites. Information abundance distribution genera Ornithomya (Hippoboscidae) Protocalliphora (Calliphoridae) in northern Europe is still generally poor, we thus explored their geographic range occurrence these flies nests a common model species, pied flycatcher Ficedula hypoleuca. Nests F. hypoleuca were collected from 21 locations...
Pollination is an ecosystem function of global importance. Yet, who visits the flower specific plants, how composition these visitors varies in space and time such variation translates into pollination services are hard to establish. The use DNA barcodes allows us address ecological patterns involving thousands taxa that difficult identify. To clarify regional visitor community a widespread resource, we compared arthropod visiting species genus Dryas (mountain avens, family Rosaceae),...
Abstract Herbivorous insects alter biogeochemical cycling within forests, but the magnitude of these impacts, their global variation, and drivers this variation remain poorly understood. To address knowledge gap help improve models, we established a network 74 plots 40 mature, undisturbed broadleaved forests. We analyzed freshly senesced green leaves for carbon, nitrogen, phosphorus silica concentrations, foliar production herbivory, stand-level nutrient fluxes. show more release by insect...
Indirect plant defence mechanisms enhance the effectiveness of natural enemies herbivores. Herbivore‐induced volatiles (HIPVs) attract parasitoids insect herbivores as shown both in numerous choice tests conducted under laboratory conditions and relatively few common‐garden setups agro‐ecosystems. However, importance this indirect trait at higher levels biological organization has yet to be investigated through field experiments. Here, we report a experiment larval parasitism two cyclic...
Abstract Despite active research, antiherbivore activity of specific plant phenolics remains largely unresolved. We constructed silver birch ( Betula pendula ) lines with modified phenolic metabolism to study the effects foliar flavonoids and condensed tannins on consumption growth larvae a generalist herbivore, autumnal moth Epirrita autumnata ). conducted feeding experiment using in which expression dihydroflavonol reductase DFR ), anthocyanidin synthase ANS or ANR had been decreased by...
1. Multiannual population cycles of geometrid moths are thought to be driven by trophic‐level interactions involving a delayed density‐dependent component. Predation on adult has been little‐studied mechanism this phenomenon. 2. Using 29 daytime and 61 night‐time predation trials in the field, we exposed living autumnal moth ( E pirrita autumnata Borkhausen, Lepidoptera: Geometridae ) females their natural predators during each autumn throughout 10‐year cycle. 3. In our northern study...
ABSTRACT Aim Long‐standing theory predicts that the intensity of biotic interactions increases from high to low latitudes. Studies addressing geographic variation in predation on insect prey have often relied models, which lack many characteristics live prey. Our goals were explore global latitudinal patterns predator attack rates standardised and compare insects with those plasticine models. Location Global forested areas. Time Period 2021–2023. Major Taxa Arthropods, birds. Methods We...
Abstract Large areas of forests are annually damaged or destroyed by outbreaking insect pests. Understanding the factors that trigger and terminate such population eruptions has become crucially important, as plants, plant‐feeding insects, their natural enemies may respond differentially to ongoing changes in global climate. In northernmost Europe, climate‐driven range expansions geometrid moths Epirrita autumnata Operophtera brumata have resulted overlapping increasingly severe outbreaks....
Large areas of forests are annually damaged or destroyed by outbreaking insect pests. Understanding the factors that trigger and terminate such population eruptions has become crucially important, as plants, plant-feeding insects, their natural enemies may respond differentially to ongoing changes in global climate. In northernmost Europe, climate-driven range expansions geometrid moths Epirrita autumnata Operophtera brumata have resulted overlapping increasingly severe outbreaks. Delayed...
The distribution ranges and spatio-temporal patterns in the occurrence activity of boreal bats are yet largely unknown due to their cryptic lifestyle lack suitable efficient study methods. We approached issue by establishing a permanent passive-acoustic sampling setup spanning area Finland gain an understanding on how latitude affects bat species composition northern Europe. recorded calls were semi-automatically identified for three target taxa; Myotis spp., Eptesicus nilssonii or...
Sensitivity of bird species to environmental metal pollution varies but there is currently no general framework predict species-specific sensitivity. Such information would be valuable from a conservation point-of-view. Calcium (Ca) has antagonistic effects on toxicity and studies with some common model show that low dietary circulating calcium levels indicate higher sensitivity harmful toxic metals. Here we measured fecal Ca five other macroelement (Potassium K, Magnesium Mg, Sodium Na,...