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Publikasjoner

NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.

2026

Sammendrag

Rapporten sammenfatter resultater fra utredningsprosjektet «Jordbruk og karbonhandel – kunnskapsstatus og mulige konsekvenser». Formålet med denne utredningen har vært å belyse hvilke muligheter og begrensninger som ligger i salg av karbonkreditter for norske bønder samt å sammenstille og tilgjengeliggjøre informasjon om det frivillige karbonmarkedet og EUs frivillige rammeverk for sertifisering av karbonfjerning. Utredningen er finansiert av midler til klima- og miljøtiltak (KMP).

Til dokument

Sammendrag

Tegegne BM, Eregno FE, Haaland SL, Gebreegziabher GG, Alemayehu S, Assayehegn E, Asgedom AG, Birhan E. 2026. Spatiotemporal assessment of nutrient pollution and water quality in Lake Hashenge, Ethiopia. Lake Reserv Manag. XXX–XXX. Nutrient enrichment is an increasing management concern in closed-basin lakes where limited water exchange increases vulnerability to eutrophication. This study assessed the spatial and seasonal dynamics of nutrient pollution in Lake Hashenge (LH), a highland crater lake in northern Ethiopia, from 2022 to 2023. Overall, 180 surface-water samples were collected from 15 monitoring sites during wet and dry seasons and analyzed for major physicochemical parameters, nitrogen (N) and phosphorus (P) species, and chlorophyll a (Chl-a). Multivariate statistical analyses of principal component analysis (PCA) and cluster analysis (CA) were used to identify dominant nutrient sources and spatial patterns, while the water quality index (WQI) and comprehensive pollution index (CPI) were applied to evaluate ecological condition. Results revealed pronounced seasonal variation, with higher nutrient concentrations and pollution indices during the dry season, likely driven by reduced inflow, evaporative concentration, and internal nutrient loading. Inflow-proximal and shoreline sites exhibited greater enrichment, reflecting agricultural runoff and grazing pressures. Chl-a concentrations indicated persistent hypertrophic conditions across seasons. CA identified 3 spatial pollution categories, demonstrating strong heterogeneity between littoral and central zones. Although mean pollution levels classified the lake as moderately degraded, localized hotspots and sustained phytoplankton biomass suggest progressive eutrophication risk. These findings provide management-relevant evidence supporting targeted watershed interventions, including runoff reduction, riparian buffer establishment, livestock access control, and strengthened land-use planning. The study demonstrates how integrated water-quality indices and multivariate analysis can inform adaptive lake management in data-limited tropical systems.