An in-depth look at Iron in boreal streams

In boreal catchments, iron has a key role in biogeochemical and ecological contexts, and at the same time has many harmful impacts on aquatic organisms and ecosystems. Recent studies indicate that iron concentrations are increasing in boreal freshwaters, with the potential negative effects this can have on water ecology. Finnish researchers have now explored the many aspects of iron in

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NEW PHD ON AGRICULTURAL MANAGEMENT, CLIMATE CHANGE, AND WATER RESOURCES

We congratulate Dr. Hannah Wenng, who received her PhD after a successful defence on 18 November 2021. The title of Hannah’s thesis is “Impacts of Climate and Agricultural Management on Hydrology and Water Quality. A Headwater Catchment Scale Approach.” In her work, Hannah has studied the connections between agricultural practices, climate, and freshwater environment. She has approached this topic from

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Ditch maintenance in drained peatland forestry – good or bad?

Cleaning of ditches to maintain an adequate water table is a common practice in peatland forestry. Ditch maintenance promotes forest growth by keeping the water table at favourable level but as a negative side effect it increases nutrient and sediment loads to waterways. In Finland, scientists have examined the trade-off between increased harvest revenues and declined water quality due to

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Excess nitrogen from agriculture may reduce variation of diatom species in streams

Researchers at the University of Oulu and the Finnish Environment Institute have addressed the question on how diatoms in rivers respond to different nutrient conditions. Interestingly, they found that high concentrations of dissolved inorganic nitrogen seem to reduce the species variability, probably because sensitive taxa disappear, while certain tolerant taxa can survive. Phosphorus is traditionally believed to be the limiting

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Nationwide study: Forests along rivers improve ecological condition

There is increasing evidence that forested riparian corridors improve the ecological status of freshwaters, but this Finnish study takes one step further and looks at the effect on a national scale. The scientists used data from more than 900 river water bodies in Finland. They found that the ecology of small to medium sized rivers in an agricultural landscape benefitted

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BIOWATER’S METTE V. CARSTENSEN RECEIVES UNIVERSITY OF AARHUS’ PHD AWARD

BIOWATER is proud to announce that our former PhD student, now post doc, Mette Vodder Carstensen, is one of five talented researchers that received Aarhus University Research Foundation’s PhD Award for 2020. We can only say, well deserved, Mette! The assessment criteria of the Aarhus University PhD programme include the excellent quality of the thesis and the general efforts of

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TREES ALONG HEADWATER STREAMS PROTECT AQUATIC ECOLOGY

Can trees along agricultural headwater streams improve the aquatic ecology and habitat quality? This question was asked by four scientists from Finnish and Canadian institutes. And their answer is: Yes, they can! The authors set out to study the effects on ecology of riparian land use. To do this, they studied 11 paired forested and open agricultural headwater stream reaches.

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