2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 11:00 AM - 11:15 AM | BOREAL STREAM BIODIVERSITY UNDER PRESENT AND FUTURE FOREST LAND USE | 250 CF
BOREAL STREAM BIODIVERSITY UNDER PRESENT AND FUTURE FOREST LAND USE
Finnish forests are heavily exploited, and the rise of ‘green bioeconomy’ places increasing demands on the intensified use of forests. Clear cutting and peatland drainage increase the amount of sediments, nutrients and metals in streams, and change the quantity and quality of particulate and dissolved organic matter. The smallest headwater streams are particularly vulnerable to forestry activities. We used a predictive modeling approach (RIVPACS), based on biological and environmental data from about one hundred near-pristine streams, to predict benthic assemblages in near-natural reference conditions. We then assessed if the taxonomic completeness of benthic assemblages in streams draining forestry-impacted watersheds differs from those lacking human disturbances. The modeling exercise showed that communities in forestry-impacted streams deviated from expected, with land drainage having generally a stronger impact than forest harvest. However, the combined effect of the two was synergistic, and the overall effect was strongest in the smallest streams. Our results suggest that current forestry practices are already harmful to stream ecosystems, and strongly intensified use of forests will likely cause an abrupt loss and change of headwater stream biodiversity
- Biodiversity
- Bioassessment
- Conservation
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Presenters/Authors
Timo Muotka
(), Ecology and Genetics Research Unit, University of Oulu, Finland, timo.muotka@oulu.fi;
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Jukka Aroviita
(), Finnish Environment Institute (Syke), jukka.aroviita@ymparisto.fi;
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Maria Rajakallio
(), University of Oulu, maria.rajakallio@oulu.fi;
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Jussi Jyväsjärvi
(), Ecology and Genetics Research Unit, University of Oulu, Finland, jussi.jyvasjarvi@oulu.fi;
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