Search results for "Ekologi"
showing 10 items of 383 documents
Maailma on säilytettävä lapsenlapsenlapsille
2014
Polsko-ukraińskie laboratorium ekologiczne
2010
Uczniowie Zespołu Szkół Elektrycznych nr 1 w Krakowie i studenci Państwowej Akademii Rolniczej w Połtawie biorą udział w projekcie edukacyjnym dla młodzieży z Polski i Ukrainy
"Yhteistyöllä me ongelmista selevitään" : tapaustutkimus vuokra-asumisessa esiintyvien ongelmien ennaltaehkäisystä
2015
Tämän pro gradu – tutkielman tavoitteena on löytää uusia menetelmiä vuokra-asumisen ongelmien ennaltaehkäisyyn vuokranantajien ja sosiaalityöntekijöiden käyttöön. Samalla tutkielmassa etsitään uusia näkökulmia siihen, miten ja missä vaiheessa vuokra-asumisen ongelmiin tulisi puuttua, jotta niiden syntyminen voitaisiin ehkäistä. Tutkielman teoreettinen pohja muodostuu Urie Bronfenbrennerin (1979) ekologisesta systeemiteoriasta, joka perustuu yksilöön ja mikro-, meso-, ekso-, makro- ja kronosysteemiin sekä niiden keskinäiseen vuorovaikutukseen. Tutkimuskohdetta tarkastellaan mesosysteemin toimijoiden eli vuokranantajien ja sosiaalityöntekijöiden näkökulmasta. Tutkimuksessa sovelletaan kvalita…
Biocultural conflicts: understanding complex interconnections between a traditional ceremony and threatened carnivores in north Kenya
2022
Abstract Biological and cultural diversity are inextricably linked and rapidly eroding worldwide. As a response, many conservation efforts foster synergies between cultural and biological diversity agendas through biocultural approaches. However, such approaches do not always address biocultural conflicts, where certain cultural practices can lead to biodiversity loss and, in turn, threaten the continuance of such practices. In this study, we examined a biocultural conflict in the Dimi ceremony, the most important rite of passage of the Daasanach agro-pastoralists of north Kenya, in which skins from threatened carnivore species are used extensively as traditional ornaments. We quantified th…
Regional variations in occupancy frequency distributions patterns between odonate assemblages in Fennoscandia
2018
Odonate (damselfly and dragonfly) species richness and species occupancy frequency distributions (SOFD) were analysed in relation to geographical location in standing waters (lakes and ponds) in Fennoscandia, from southern Sweden to central Finland. In total, 46 dragonfly and damselfly species were recorded from 292 waterbodies. Species richness decreased to the north and increased with waterbody area in central Finland, but not in southern Finland or in Sweden. Species occupancy ranged from 1 up to 209 lakes and ponds. Over 50% of the species occurred in less than 10% of the waterbodies, although this proportion decreased to the north. In the southern lakes and ponds, none of the species o…
Increasing air temperature relative to water temperature makes the mixed layer shallower, reducing phytoplankton biomass in a stratified lake
2023
The depth of the mixed layer is a major determinant of nutrient and light availability for phytoplankton in stratified waterbodies. Ongoing climate change influences surface waters through meteorological forcing, which modifies the physical structure of fresh waters including the mixed layer, but effects on phytoplankton biomass are poorly known. To determine the responses of phytoplankton biomass to the depth of the mixed layer, light availability and associated meteorological forcing, we followed daily changes in weather and water column properties in a boreal lake over the first half of a summer stratification period. Phytoplankton biomass increased with the deepening of the mixed layer …
Perhekeskus Itä- ja Keski-Suomessa : teorian ja käytännön kohtaaminen
2012
TIIVISTELMÄ Haikara, Marjo & Nieminen, Maija. PERHEKESKUS ITÄ- JA KESKI-SUOMESSA: TEORIAN JA KÄYTÄNNÖN KOHTAAMINEN. Kasvatustieteen pro gradu -työ. Jyväskylän yliopiston kasvatustieteiden laitos, 2012. 94 sivua. Julkaisematon. Tutkimuksemme tarkoitus on selvittää, millaisia aihealueita perhekeskukseen liittyvistä julkisista hankemateriaaleista muodostuu keskeisiksi teemoiksi tekstejä analysoitaessa ja toisaalta käytännön haastattelujen kautta tutkia, miten olemassa oleva teoria ja haas-tatteluissa esille tulleet teemat kohtaavat. Haastattelut toteutettiin Pieksämäen perhepalvelukeskuksessa, Joensuun Perheentalossa ja Keuruun verkostomaisesti toimivassa perhekeskuksessa. Perhekeskus-teeman m…
Bacterial Diversity in a Dynamic and Extreme Sub-Arctic Watercourse (Pasvik River, Norwegian Arctic)
2020
Microbial communities promptly respond to the environmental perturbations, especially in the Arctic and sub-Arctic systems that are highly impacted by climate change, and fluctuations in the diversity level of microbial assemblages could give insights on their expected response. 16S rRNA gene amplicon sequencing was applied to describe the bacterial community composition in water and sediment through the sub-Arctic Pasvik River. Our results showed that river water and sediment harbored distinct communities in terms of diversity and composition at genus level. The distribution of the bacterial communities was mainly affected by both salinity and temperature in sediment samples, and by oxygen…
The effect of variation in developmental mode on the population dynamics of a spionid polychaete (Pygospio elegans) in a heterogeneous environment
2018
Temperature effects explain continental scale distribution of cyanobacterial toxins
2018
Insight into how environmental change determines the production and distribution of cyanobacterial toxins is necessary for risk assessment. Management guidelines currently focus on hepatotoxins (microcystins). Increasing attention is given to other classes, such as neurotoxins (e.g., anatoxin-a) and cytotoxins (e.g., cylindrospermopsin) due to their potency. Most studies examine the relationship between individual toxin variants and environmental factors, such as nutrients, temperature and light. In summer 2015, we collected samples across Europe to investigate the effect of nutrient and temperature gradients on the variability of toxin production at a continental scale. Direct and indirect…