Search results for "ympäristötekijät"
showing 10 items of 58 documents
Hydraulic Habitat Structure Impacts Risk of Trematode Infection
2022
Abstract— Variability in infection rates of trematodes Diplostomum pseudospathaceum in 0+ rainbow trout Oncorhynchus mykiss under different hydraulic regimes was studied in the experimental setup with regulated flow rates and environmental heterogeneity. The average infection rate in the conditions of the current was 1.5 times less than that in the stagnant water. An increase of the flow rate from 3.2 to 11.3 cm/s did not result in lower infection rates, while the interindividual variability in the infection rate (coefficient of variation) tended to increase along with changing the still-water conditions (20%) to the high flow rate environments (40%) within the experiment. A decrease in th…
Ilmansaasteet rapauttavat fyysisen aktiivisuuden dementialta suojaavaa vaikutusta
2022
The effect of variation in developmental mode on the population dynamics of a spionid polychaete (Pygospio elegans) in a heterogeneous environment
2018
Pyöräilytaidon oppimista selittävät yksilö-, ympäristö- ja tehtävätason tekijät 1950-2010-luvuilla
2021
Pyöräily on yksi suomalaisten yleisimmistä liikkumismuodoista. Yhteiskunnan tasolla pyöräilyn merkityksissä korostuvat väestön arkiliikunnan lisääminen ja kestävän liikenteen edistäminen. Suomalaislapsille pyöräilytaito mahdollistaa merkittävän itsenäisen liikkumisen tavan ja edesauttaa elinpiirin laajentumista. Pyöräilytaidon oppimiseen liittyvistä tekijöistä tiedetään kuitenkin hyvin vähän. Tämä tieto olisi tärkeää, jotta mahdollisimman monelle voitaisiin jo varhaisella iällä tarjota mahdollisuus omaksua pyöräilyn kautta fyysisesti aktiivinen ja ekologisesti kestävä elämäntapa. Tämän tutkimuksen tarkoitus oli selvittää, mitkä yksilö-, ympäristö- ja tehtävätekijät selittävät pyöräilytaidon…
Global monitoring of soil animal communities using a common methodology.
2022
Here we introduce the Soil BON Foodweb Team, a cross-continental collaborative network that aims to monitor soil animal communities and food webs using consistent methodology at a global scale. Soil animals support vital soil processes via soil structure modification, consumption of dead organic matter, and interactions with microbial and plant communities. Soil animal effects on ecosystem functions have been demonstrated by correlative analyses as well as in laboratory and field experiments, but these studies typically focus on selected animal groups or species at one or few sites with limited variation in environmental conditions. The lack of comprehensive harmonised large-scale soil anim…
Do large‐scale associations in birds imply biotic interactions or environmental filtering?
2023
Aim There has been a wide interest in the effect of biotic interactions on species' occurrences and abundances at large spatial scales, coupled with a vast development of the statistical methods to study them. Still, evidence for whether the effects of within-trophic-level biotic interactions (e.g. competition and heterospecific attraction) are discernible beyond local scales remains inconsistent. Here, we present a novel hypothesis-testing framework based on joint dynamic species distribution models and functional trait similarity to dissect between environmental filtering and biotic interactions. Location France and Finland. Taxon Birds. Methods We estimated species-to-species association…
Shared socioeconomic pathways for climate change research in Finland: co-developing extended SSP narratives for agriculture
2021
AbstractShared socioeconomic pathways (SSPs), developed at global scale, comprise narrative descriptions and quantifications of future world developments that are intended for climate change scenario analysis. However, their extension to national and regional scales can be challenging. Here, we present SSP narratives co-developed with stakeholders for the agriculture and food sector in Finland. These are derived from intensive discussions at a workshop attended by approximately 39 participants offering a range of sectoral perspectives. Using general background descriptions of the SSPs for Europe, facilitated discussions were held in parallel for each of four SSPs reflecting very different c…
Kohti huippu-urheilijan uraa : tutkimus nuorten urheilijoiden sosiaalisista, fyysisistä ja psyykkisistä taustatekijöistä sekä heidän uraan vaikuttane…
2012
Turpeinen, Heli 2012. Kohti huippu-urheilijan uraa. Tutkimus nuorten urheilijoiden sosiaalisista, fyysisistä ja psyykkisistä taustatekijöistä sekä heidän uraan vaikuttaneista ympäristötekijöistä. Jyväskylän Yliopisto. Liikuntapedagogiikan pro gradu- tutkielma, 106s. Tutkimuksen tarkoituksena on selvittää suomalaisten urheilijalupausten sosiaalisia, fyysisiä ja psyykkisiä taustatekijöistä sekä urheilijoiden uraan vaikuttaneita ympäristötekijöitä. Tutkimuksessa tarkasteltuja sosiaalisia tekijöitä olivat päälajin valinta, erikoistuminen, organisoidun urheilun ja määrätietoisen valmentautumisen aloittaminen sekä perhe, valmennussuhde ja koulutus. Fyysisistä tekijöistä tarkasteltiin vartalon fyy…
Muscle cross-sectional area and structural bone strength share genetic and environmental effects in older women
2009
The purpose of this study was to estimate to what extent muscle cross-sectional area of the lower leg (mCSA) and tibial structural strength are influenced by common and trait-specific genetic and environmental factors. pQCT scans were obtained from both members of 102 monozygotic (MZ) and 113 dizygotic (DZ) 63- to 76-yr-old female twin pairs to estimate the mCSA of the lower leg, structural bending strength of the tibial shaft (BSIbend), and compressive strength of the distal tibia (BSIcomp). Quantitative genetic models were used to decompose the phenotypic variances into common and trait-specific additive genetic (A), shared environmental (C), and individual environmental (E) effects. The …
Evolutionary trade-offs in a small mammal : a quantitative genetics approach
2017
Limited resources force individuals to trade-off between life-history traits. A vast diversity of life-history strategies, which optimally combine life history traits, can be found. Knowledge of the genetic basis of this phenotypic variation is key to understanding evolutionary processes. I approached life-history evolution by estimating quantitative genetic parameters for a set of life-history traits in the bank vole (Myodes glareolus). The work is based on a laboratory-kept colony subjected to two-way selection for litter size (High- (H) and Low- (L) lines). Costs of the created reproductive strategies were observed in natural conditions. Selection increased the difference in litter size …