9 Works

Data from: Rewetting of drained boreal spruce swamp forests results in rapid recovery of Sphagnum production

Liisa Maanavilja, Laura Kangas, Lauri Mehtätalo & Eeva-Stiina Tuittila
1. Peatland rewetting aims to restore biomass accumulation from peat-forming plants for climate change mitigation, biotope conservation and water purification purposes. Boreal spruce swamp forests in Europe have suffered heavily from drainage for forestry and are now a focus of restoration efforts. 2. We measured Sphagnum height and biomass increment by allowing Sphagnum to grow through mesh nets located in nine undrained, nine drained and 18 rewetted boreal spruce swamp forests. 3. At the moss...

Data from: Enriched rearing environment and wild genetic background can enhance survival and disease resistance of salmonid fishes during parasite epidemics

Anssi Karvonen, Mariella Aalto-Araneda, Anna-Maija Virtala, Raine Kortet, Perttu Koski & Pekka Hyvärinen
The importance and volume of aquaculture is increasing world-wide. Rearing practices play a key role in determining growth rate, survival and disease resistance in aquaculture fishes. Recent evidence suggests that in comparison with a standard stimulus-poor rearing environment, an enriched or variable rearing environment has significant positive effects on several traits underlying growth and well-being of fish. However, the effect of enriched rearing on one of the most important threats for aquaculture development, occurrence of...

Data from: Male investments in high quality sperm improve fertilization success, but may have negative impact on offspring fitness in whitefish

Jukka Kekäläinen, Carles Soler, Sami Veentaus & Hannu Huuskonen
Many ejaculate traits show remarkable variation in relation to male social status. Males in disfavoured (subordinate) mating positions often invest heavily on sperm motility but may have less available resources on traits (e.g., secondary sexual ornaments) that improve the probability of gaining matings. Although higher investments in sperm motility can increase the relative fertilization success of subordinate males, it is unclear whether status-dependent differences in sperm traits could have any consequences for offspring fitness. We...

Data from: Phylogeny of Salix subgenus Salix s.l. (Salicaceae): delimitation biogeography and reticulate evolution

Jie Wu, Tommi Nyman, Dong-Chao Wang, George W. Argus, Yong-Ping Yang & Jia-Hui Chen
Background The taxonomy and systematics of Salix subgenus Salix s.l. is difficult. The reliability and evolutionary implications of two important morphological characters (number of stamens, and morphology of bud scales) used in subgeneric classification within Salix remain untested, and a disjunct Old–New World distribution pattern of a main clade of subgenus Salix s.l., revealed by a previous study, lacks a reasonable explanation. To study these questions, we conducted phylogenetic analyses based on 4,688 bp of...

Data from: Combined effects of retention forestry and prescribed burning on polypore fungi

Mai Suominen, Kaisa Junninen, Osmo Heikkala & Jari Kouki
1. Retention forestry and prescribed burning aim to alleviate the negative effects of forestry on biodiversity by maintaining the structural elements of natural forests in managed forests. We present the long-term effects of these methods on polypore fungi, a taxonomic group that has been severely affected by forestry. 2. Using a 10-year, large-scale field experiment, we studied how prescribed burning and two different tree retention levels (10 and 50 m3 ha−1) affect polypore fungi. We...

Data from: Determinants of parasitoid communities of willow-galling sawflies: habitat overrides physiology, host plant, and space

Tommi Nyman, Sanna A. Leppänen, Gergely Várkonyi, Mark R. Shaw, Reijo Koivisto, Trond Elling Barstad, Veli Vikberg & Heikki Roininen
Studies on the determinants of plant–herbivore and herbivore–parasitoid associations provide important insights into the origin and maintenance of global and local species richness. If parasitoids are specialists on herbivore niches rather than on herbivore taxa, then alternating escape of herbivores into novel niches and delayed resource tracking by parasitoids could fuel diversification at both trophic levels. We used DNA barcoding to identify parasitoids that attack larvae of seven Pontania sawfly species that induce leaf galls...

Data from: Intra- and trans-generational effects of larval diet on susceptibility to an entomopathogenic fungus, Beauveria bassiana, in the greater wax moth, Galleria mellonella

Katariina Kangassalo, Terhi M. Valtonen, Derek Roff, Mari Pölkki, Ivan M. Dubovskiy, Jouni Sorvari & Markus J. Rantala
In addition to nutritional conditions experienced by individuals themselves, those experienced by their parents can affect their immune function. Here, we studied the intra- and trans-generational effects of larval diet on susceptibility to an entomopathogenic fungus, Beauveria bassiana, in the greater wax moth, Galleria mellonella. In the first part of the study, a split-brood design was used to compare the susceptibility of full sibs raised either on low- or on high-nutrition larval diet. In the...

Data from: Edge influence on vegetation at natural and anthropogenic edges of boreal forests in Canada and Fennoscandia

Karen A. Harper, S. Ellen Macdonald, Michael S. Mayerhofer, Shekhar R. Biswas, Per-Anders Esseen, Kristoffer Hylander, Katherine J. Stewart, Azim U. Mallik, Pierre Drapeau, Bengt-Gunnar Jonsson, Daniel Lesieur, Jari Kouki & Yves Bergeron
1. Although anthropogenic edges are an important consequence of timber harvesting, edges due to natural disturbances or landscape heterogeneity are also common. Forest edges have been well-studied in temperate and tropical forests, but less so in less productive, disturbance-adapted boreal forests. 2. We synthesized data on forest vegetation at edges of boreal forests and compared edge influence among edge types (fire, cut, lake/wetland; old vs. young), forest types (broadleaf vs. coniferous) and geographic regions. Our...

Data from: Establishing a community-wide DNA barcode library as a new tool for arctic research

H. Wirta, G. Várkonyi, C. Rasmussen, R. Kaartinen, N. M. Schmidt, P. D. N. Hebert, M. Barták, G. Blagoev, H. Disney, S. Ertl, P. Gjelstrup, D. J. Gwiazdowicz, L. Huldén, J. Ilmonen, J. Jakovlev, M. Jaschhof, J. Kahanpää, T. Kankaanpää, P. H. Krogh, R. Labbee, C. Lettner, V. Michelsen, S. A. Nielsen, T. R. Nielsen, L. Paasivirta … & T. Roslin
DNA sequences offer powerful tools for describing the members and interactions of natural communities. In this study, we establish the to-date most comprehensive library of DNA barcodes for a terrestrial site, including all known macroscopic animals and vascular plants of an intensively studied area of the High Arctic, the Zackenberg Valley in Northeast Greenland. To demonstrate its utility, we apply the library to identify nearly 20 000 arthropod individuals from two Malaise traps, each operated...

Registration Year

  • 2015

Resource Types

  • Dataset


  • University of Eastern Finland
  • University of Helsinki
  • Finnish Environment Institute
  • University of Quebec at Montreal
  • National Museums Scotland
  • University of Cambridge
  • Roskilde University
  • University of Alberta
  • Mid Sweden University
  • Aarhus University