Search results for "turve"
showing 10 items of 84 documents
Testate amoebae as a potential tracer of organic matter dislodged from peat extraction areas
2020
In the boreal zone, surface waters mostly receive external organic matter (OM) from surrounding peatlands. The lake’s biological communities may respond to changes in OM inputs caused by anthropogenic activities in the catchment. Testate amoebae (TA) possess an outer shell that preserves well in lake sediments and are commonly used in paleo-environmental studies. Additionally, they fall into the size range of particles transported from peatlands to lakes, making them potential particle tracers. Here, we compared TA communities of current and pre-peat extraction sediments from lakes receiving OM only from peat extraction areas (impact lakes) with lakes receiving OM from peatlands under other…
Testate amoebae community analysis as a tool to assess biological impacts of peatland use
2018
As most ecosystems, peatlands have been heavily exploited for different human purposes. For example, in Finland the majority is under forestry, agriculture or peat mining use. Peatlands play an important role in carbon storage, water cycle, and are a unique habitat for rare organisms. Such properties highlight their environmental importance and the need for their restoration. To monitor the success of peatland restoration sensitive indicators are needed. Here we test whether testate amoebae can be used as a reliable bioindicator for assessing peatland condition. To qualify as reliable indicators, responses in testate amoebae community structure to ecological changes must be stronger than ra…
Finnish dairy farmers’ perceptions of justice in the transition to carbon-neutral farming
2022
Highlights • Finnish dairy farmers' perceptions of issues with carbon neutrality were examined. • Concerns include farming profitability, farmer blaming, and use of peatlands. • Public policy guidance is needed for carbon-neutral, sustainable agriculture. Environmental and political debate concerning the role of agriculture in sustainability has long been on the agenda. However, owing to climate change, an analysis of the transition to a low-carbon society must also be considered from the perspective of justice. Dairy farming, in particular, faces pressure in this context, when contemplating changing consumer behaviors and reduction in the carbon footprint of dairy products. Accordingly, ma…
Restoring ecosystem structure and functions : results from Sphagnum peatlands degraded by forestry drainage
2014
Disentangling the effects of methanogen community and environment on peatland greenhouse gas production by a reciprocal transplant experiment
2020
Northern peatlands consist of a mosaic of peatland types that vary spatially and temporally and differ in their methane (CH4) production. Microbial community composition and environment both potentially control the processes that release carbon from anoxic peat either as CH4 or carbon dioxide (CO2), a less potent greenhouse gas than CH4. However, the respective roles of these controls remain unclear, which prevents incorporating microbes in the predictions of peatland CH4 emissions. 2.Here, a reciprocal transplant experiment was carried out to separate the influences of microbial community and environment in CH4 and anaerobic CO2 production. Peat from an acidic Sphagnum bog and a sedge fen …
Search for supersymmetry in events with photons, bottom quarks, and missing transverse momentum in proton-proton collisions at a centre-of-mass energ…
2013
A search has been performed for the experimental signature of an isolated photon with high transverse momentum, at least one jet identified as originating from a bottom quark, and high missing transverse momentum. Such a final state may originate from supersymmetric models with gauge-mediated supersymmetry breaking in events in which one of a pair of higgsino-like neutralinos decays into a photon and a gravitino while the other decays into a Higgs boson and a gravitino. The search is performed using the full dataset of 7 TeV proton–proton collisions recorded with the ATLAS detector at the LHC in 2011, corresponding to an integrated luminosity of 4.7 fb−1. A total of 7 candidate events are o…
Paikantuneita haluja : seksuaalisuus ja tila Christer Kihlmanin tuotannossa
2014
Homoseksuaalisuuden ja seksuaalisen toiseuden kuvaukset ovat olleet suomalaisessa kirjallisuudessa pitkään kartoittamaton alue. Identiteettipoliittisen ulostulokirjallisuuden perinteen puuttuminen ei ole kuitenkaan estänyt käsittelemästä aihetta. Mikko Carlsonin tutkimus suomenruotsalaisen kirjailijan Christer Kihlmanin tuotannosta pureutuu 1970- ja 1980-luvuilla julkaistuihin teoksiin, joiden ilmestyminen osui kiinnostavaan seksuaalipoliittiseen murroskohtaan. Millä tavoin normeja rikkova seksuaalisuus suhteutuu kulttuuriseen tilaan? Miten Kihlmanin teokset murtavat seksuaalista kahtiajakoa? Mitä ovat kaapista ulostulon erityiset kulttuuriset reunaehdot, kun suomenruotsalainen kulttuuri va…
Changes in pore water quality after peatland restoration: Assessment of a large¿scale, replicated Before-After-Control-Impact study in Finland
2017
Drainage is known to affect peatland natural hydrology and water quality, but peatland restoration is considered to ameliorate peatland degradation. Using a replicated BACIPS (Before-After-Control-Impact Paired Series) design, we investigated 24 peatlands, all drained for forestry and subsequently restored, and 19 pristine control boreal peatlands with high temporal and spatial resolution data on hydroclimate and pore water quality. In drained conditions, total nitrogen (Ntot), total phosphorus (Ptot), and dissolved organic carbon (DOC) in pore water were several-fold higher than observed at pristine control sites, highlighting the impacts of long-term drainage on pore water quality. In gen…
Ojituksen ja ennallistamisen aiheuttamat muutokset kasvilajistossa ja –yhteisöissä
2013
Verkostonäkökulma ennallistamiskohteiden valinnassa
2013
Verkostonäkökulma korostuu vahvasti luonnonsuojelun suunnittelussa Suomessa ja maailmalla. Suojelualueita ei voi nähdä yksittäisinä eristyneinä alueina, vaan luonnonsuojelualueiden verkosto ja koko ympäröivä maisema ylläpitävät yhdessä tietyn alueen eliölajistoa. Parhaiden alueiden kytkeytyvyyden varmistamista ja verkostojen ylläpitämistä on myös ehdotettu ratkaisuksi biodiversiteetin säilyttämiselle, kun ilmastonmuutos pakottaa lajeja siirtymään uusille asuinalueille. Verkostonäkökulma kannattaa huomioida myös ennallistamiskohteiden valinnassa – mikä ei kuitenkaan ole yksiselitteistä ja helppoa. nonPeerReviewed