Geological report of the Paz River basin

Appendix 13/15 of the publication "State of the environment in the Norwegian, Finnish and Russian border area 2007" (The Finnish Environment 6/2007)

Misteli on vakiintumassa Suomeen

Mistletoe (Viscum album) has during the 2010’s been spreading in the vicinity of Turku (Varsinais-Suomi, Finland). This is the first known fertile V. album population within the country. The situation in 2018 is mapped here, with a review of the biology and dispersal of this hemi-parasitic species. V. album was found at 48 locations, with the total number of shoots (seed-originating clones) being 307. The plants werestill young and mostly sterile. The most common host trees noted were Populus, Malus, Sorbus, Tilia and Acer species, all growing in open sites on the edges of  inhabited areas. The findings are consistent withfirst-generation seedlings, dispersed by birds from a common mother population. A candidate for such a population was located within the town of Naantali. The lack of Viscum album sightings in the surrounding districts would indicate that the current dispersal originates from mistletoe imported for decoration.The prospects of future dispersal in Finland are discussed, including the suitability of local host trees and the behaviour of birds.</p

Reworked Middle Pleistocene deposits preserved in the core region of the Fennoscandian Ice Sheet

Publisher Copyright: © 2020 The AuthorsDuring successive Pleistocene ice ages, Finnish Lapland lay under the cold-based centre of the Fennoscandian Ice Sheet (FIS). This area largely escaped deep glacial erosion by the fast-flowing wet-based ice streams that developed toward the periphery of successive ice sheets. Low erosion is evident from the preservation of Neogene weathered bedrock and a significant record of tills of the pre-Weichselian sediments. To date, some 250 locations are known where sediments occur beneath and within last glaciation deposits (Weichselian). An ongoing challenge is to determine absolute ages for old sediments and to establish regional stratigraphic correlations from one site to another. At Äältövittikot, lacustrine silts and rippled sands are found as rafts and inter-till layers within the Weichelian tills. The results indicate an age range of 190–235 ka identifying a likely MIS 7 age i.e., an early or mid Saalian Stage for the older sediments and a couple of younger OSL ages representing Weichselian interstadials as an indication for the multiphase deposition of the Äältövittikot sediment complex. Overlying Weichselian tills contain large amounts of glaciotectonically-deformed and reworked Saalian material. The reworking of Saalian sediment in an up-ice position from the headward erosion zone of the Salla ice stream is important for understanding the polycyclic origins of tills found in similar locations and for interpretation of tracer minerals found in mineral exploration surveys in similar glaciated terrains.Peer reviewe

Metabolomic discrimination of the edible mushrooms Kuehneromyces mutabilis and Hypholoma capnoides (Strophariaceae, Agaricales) by NMR spectroscopy

Two edible, cultivable mushroom species of the family Strophariaceae, Kuehneromyces mutabilis (sheathed woodtuft) and Hypholoma capnoides (conifer tuft), were studied using proton nuclear magnetic resonance metabolomic approach. The variation in the metabolites of the two species and their metabolic behaviourregarding caps and stipes and different collection sites were analysed by multivariate analysis methods. Altogether 169 cap and stipe samples of the mushrooms were investigated. The clearest difference between the species was in the sugar composition, which was more diverse in H. capnoides. When mushroom samples collected from different locations were compared, more variance was found in H. capnoides, whereas K. mutabilis appeared more homogeneous as a species. As far as the caps and stipes were concerned, in both species the amount of α-α-trehalose was clearly higher in the stipes, and the caps contained a larger proportion of the amino acids and organic acids.</p

Samordning ab grundvatteskyddet och stenmaterial försörjningen : Slutrapport från Outokumpu trakten

Alueelliset ympäristöjulkaisu

Samordning av grundvattenskyddet och stenmaterial försörjningen : Slutrapport från Joensuu trakten

Alueelliset ympäristöjulkaisu