53 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: Grazed wet meadows are sink habitats for the southern dunlin (Calidris alpina schinzii) due to nest trampling by cattle

Veli-Matti Pakanen, Sami Aikio, Aappo Luukkonen & Kari Koivula
The effect of habitat management is commonly evaluated by measuring population growth, which does not distinguish changes in reproductive success from changes in survival or the effects of immigration or emigration. Management has rarely been evaluated considering complete life cycle of the target organisms, including also possible negative impacts from management. We evaluated the effectiveness of cattle grazing in the restoration of coastal meadows as a breeding habitat for small and medium-sized ground-nesting birds by...

Data from: Strong dispersal in a parasitoid wasp overwhelms habitat fragmentation and host population dynamics

Christelle Couchoux, Perttu Seppä & Saskya Van Nouhuys
The population dynamics of a parasite depend on species traits, host dynamics, and the environment. Those dynamics are reflected in the genetic structure of the population. Habitat fragmentation has a greater impact on parasites than on their hosts because resource distribution is increasingly fragmented for species at higher trophic levels. This could lead to either more or less genetic structure than the host, depending on the relative dispersal rates of species. We examined the spatial...

Registration Year

  • 2016
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Affiliations

  • University of Helsinki
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  • University of Jyväskylä
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