4 Works

Data from: Primary production calculations for sea ice from bio-optical observations in the Baltic Sea

Susann Müller, Anssi V. Vähätalo, Jari Uusikivi, Markus Majaneva, Sanna Majaneva, Riitta Autio & Janne-Markus Rintala
Bio-optics is a powerful approach for estimating photosynthesis rates, but has seldom been applied to sea ice, where measuring photosynthesis is a challenge. We measured absorption coefficients of chromophoric dissolved organic matter (CDOM), algae, and non-algal particles along with solar radiation, albedo and transmittance at four sea-ice stations in the Gulf of Finland, Baltic Sea. This unique compilation of optical and biological data for Baltic Sea ice was used to build a radiative transfer model...

Data from: Sediments and flow have mainly independent effects on multitrophic stream communities and ecosystem functions

Kaisa-Riikka Mustonen, Heikki Mykrä, Pauliina Louhi, Annamari Markkola, Mikko Tolkkinen, Ari Huusko, Nico Alioravainen, Sirkku Mäkinen, Timo Muotka & Sirkku Lehtinen
Stream ecosystems are affected by multiple abiotic stressors, and species responses to simultaneous stressors may differ from those predicted based on single-stressor responses. Using 12 semi-natural stream channels, we examined the individual and interactive effects of flow level (low or high flow) and addition of fine sediments (grain size < 2mm) on key ecosystem processes (leaf breakdown, algal biomass accrual) and benthic macroinvertebrate and fungal communities. Both stressors had mostly independent effects on biological responses,...

Data from: A comparative analysis reveals little evidence for niche conservatism in aquatic macrophytes among four areas on two continents

Janne Alahuhta, Frauke Ecke, Lucinda B. Johnson, Laura Sass & Jani Heino
One of the most intriguing questions in current ecology is the extent to which the ecological niches of species are conserved in space and time. Niche conservatism has mostly been studied using coarse-scale data of species' distributions, although it is at the local habitat scales where species' responses to ecological variables primarily take place. We investigated the extent to which niches of aquatic macrophytes are conserved among four study regions (i.e. Finland, Sweden and the...

Data from: Ignoring spatial effects results in inadequate models for variation in littoral macroinvertebrate diversity

Kimmo T. Tolonen, Annika Vilmi, Satu-Maaria Karjalainen, Seppo Hellsten, Tapio Sutela & Jani Heino
Studies focusing on the effects of spatial processes versus environmental filtering on aquatic metacommunities have so far been focused almost entirely on relatively isolated systems, such as sets of different lakes or streams. In contrast, metacommunity patterns and underlying processes within a single aquatic system have received less attention. In this study, we aimed to examine how strongly variations in different diversity indices are affected by spatial processes (dispersal) versus local environmental conditions (species sorting)...

Registration Year

  • 2016
    4

Resource Types

  • Dataset
    4

Affiliations

  • Finnish Environment Institute
    4
  • Natural Resources Institute Finland
    2
  • University of Oulu
    2
  • University of Minnesota
    1
  • Swedish University of Agricultural Sciences
    1
  • University of Helsinki
    1
  • University of Illinois System
    1
  • University of Jyväskylä
    1