6 Works

Environmental drivers of Sphagnum growth in peatlands across the Holarctic region

Fia Bengtsson, Håkan Rydin, Jennifer Baltzer, Luca Bragazza, Zhao-Jun Bu, Simon Caporn, Ellen Dorrepaal, Kjell Ivar Flatberg, Olga Galanina, Mariusz Gałka, Anna Ganeva, Irina Goia, Nadezhda Goncharova, Michal Hajek, Akira Haraguchi, Lorna Harris, Elyn Humphreys, Martin Jiroušek, Katarzyna Kajukało, Edgar Karofeld, Natalia Koronatova, Natalia Kosykh, Anna Laine, Mariusz Lamentowicz, Elena Lapshina … & Richard J. Payne
The relative importance of global versus local environmental factors for growth and thus carbon uptake of the bryophyte genus Sphagnum – the main peat-former and ecosystem engineer in northern peatlands – remains unclear. 2) We measured length growth and net primary production (NPP) of two abundant Sphagnum species across 99 Holarctic peatlands. We tested the importance of previously proposed abiotic and biotic drivers for peatland carbon uptake (climate, N deposition, water table depth, and vascular...

Data from: Antiepileptic drug use and mortality among community-dwelling persons with Alzheimer’s disease

Tatyana Sarycheva, Piia Lavikainen, Heidi Taipale, Jari Tiihonen, Antti Tanskanen, Sirpa Hartikainen & Anna-Maija Tolppanen
Objective: To evaluate the risk of death in relation to incident antiepileptic drug use compared with non-use in people with Alzheimer’s disease (AD) through the assessment in terms of duration of use, specific drugs and main causes of death. Methods: The MEDALZ cohort includes all Finnish persons who received a clinically verified AD diagnosis (N=70718) in 2005‒2011. Incident AED users were identified with 1-year washout period. For each incident AED user (n=5638) one non-user was...

Offspring phenotype is shaped by the non-sperm fraction of semen

Jukka Kekäläinen, Annalaura Jokiniemi, Matti Janhunen & Hannu Huuskonen
In a large majority of animal species, the only contribution of males to the next generation has been assumed to be their genes (sperm). However, along with sperm, seminal plasma contains a wide array of extracellular factors that have many important functions in reproduction. Yet, the potential intergenerational effects of these factors are virtually unknown. We investigated these effects in European whitefish (Coregonus lavaretus) by experimentally manipulating the presence and identity of seminal plasma and...

Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age

Adam Clark, Risto Virtanen, Michael Den Herder & Heikki Roininen
1. To predict shrub responses under climate change in tundra, we need to understand how thermal conditions and herbivory contribute to growth. We hypothesise that shrub growth increases with thermal conditions and precipitation, but that this increase is counteracted by insect herbivory, and that these climate-insect herbivory relationships are modified by both browsing and plant age. 2. We use empirical dynamic modelling (EDM) to analyse a 20-year time series on willow (Salix phylicifolia) shoot growth,...

Data from: Climate warming prolongs the time interval between leaf-out and flowering in temperate trees: effects of chilling, forcing and photoperiod

Qianqian Ma, Jian-Guo Huang, Heikki Hänninen, Xiaobo Li & Frank Berninger
1. Leaf-out and flowering are two key phenological events of plants, denoting the respective onsets of visible vegetative growth and reproduction during the year. For each species, the schedule of vegetative growth and reproduction is crucial to the maximization of its fitness. Warming-induced advances of leaf-out and flowering have been reported frequently, however, it is unclear whether the responses of the two events are equal for any given species. 2. Using long-term phenological records in...

Data from: Divergence of Arctic shrub growth associated with sea ice decline

Agata Buchwal, Patrick F. Sullivan, Marc Macias-Fauria, Eric Post, Isla H. Myers-Smith, Julienne C. Stroeve, Daan Blok, Ken D. Tape, Bruce C. Forbes, Pascale Ropars, Esther Lévesque, Bo Elberling, Sandra Angers-Blondin, Joseph S. Boyle, Stéphane Boudreau, Noémie Boulanger-Lapointe, Cassandra Gamm, Martin Hallinger, Grzegorz Rachlewicz, Amanda Young, Pentti Zetterberg & Jeffrey M. Welker
Arctic sea ice extent (SIE) is declining at an accelerating rate with a wide range of ecological consequences. However, determining sea ice effects on tundra vegetation remains a challenge. In this study, we examined the universality or lack thereof in tundra shrub growth responses to changes in SIE and summer climate across the Pan-Arctic, taking advantage of 23 tundra shrub-ring chronologies from 19 widely distributed sites (56⁰-83⁰N).

Registration Year

  • 2020

Resource Types

  • Dataset


  • University of Eastern Finland
  • University of Oulu
  • Adam Mickiewicz University in Poznań
  • Wilfrid Laurier University
  • University of Neuchâtel
  • University of Alaska Fairbanks
  • University of Edinburgh
  • McGill University
  • Bulgarian Academy of Sciences
  • Northern Arizona University