ARCTIC OSTRACODS AND COPEPODS OF THE HYPORHEIC ZONE IN SWEDISH LAPLAND – ASSEMBLAGES’ RESILIENCE AND SHELL CHEMISTRY (ARCTICOSCOP)
The resilience of hyporheic biota in Arctic streams is strongly controlled by long-lasting stress related to persistently low water temperatures, prolonged ice-cover, permafrost occurence, strong freeze-thaw cycles, nutrient availability, and frequent disturbance of their physical habitats. Consequently, the structural pattern of hyporheic biota is distinct in biodiversity, ecology, morphological, life-cycle and behavior adaptations in order to ensure their resistance and persistence under adverse environmental conditions. The hydrological and chemical processes occurring in the hyporheic zone in Arctic streams have received increased attention in recent years, yet the studies on primary succession of biotic assemblage and their response to cope with extreme environmental conditions are still scarce.
The ArticOsCop project funded through the European Union’s INTERACT funding scheme will assess the effect of habitat instability and changing environmental settings on the resilience of ostracod and copepods communities from the hyporheic zone in glacier-fed rivers. During July 2104 we will conduct our research in the Storglaciaren valley at the Tarfala station (Swedesh Lappland). We will perform a combination of field monitoring surveys – biota, water discharge, temperature, sediment structure, (geo)chemical analyses of water, sediments analyses (via CHNS/O elemental analyzes; micro-XRF and susceptibility) and ostracods shell geochemistry (Mg/Ca, Sr/Ca and 13C/12C).
Iepure, S., Lillo Ramos J. 2014. State of the art of hyporheic invertebrates from glacial-feed streams in two contrasted scenarios, Workshop: Ecology of Glacier Forelands, September 17-21, Alpine Research Centre, Obergurgl, Austria.