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A new optimised methods to extract fish eDNA

Monitoring fish is necessary for understanding population dynamics, tracking distribution patterns and evaluating conservation efforts. Molecular techniques targeting environmental DNA (eDNA) are now considered effective methods for detecting specific species or characterising fish communities. The analysis of DNA from lake-surface sediments (sedDNA) can provide a time-integrated sampling approach which reduces the variability sometimes observed in water samples. However, studies of sedDNA have had varying success in detecting fish. The present study aimed to determine the most effective extraction method for recovering fish DNA from lake-surface sediments.

In the paper Optimised protocol for the extraction of fish DNA from freshwater sediments just published in Freshwater Biology members of the Lakes380 team, lead by PhD student Georgia Thomson-Laing, describe the development of a technique to maximise chances of extracting fish DNA from lake sediment.

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Congratulations Jamie Howarth

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Lakes Appreciation Month – What do we value about our lakes?

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New manuscript on Rototoa (Auckland)

New manuscript on Lake Rototoa in Auckland has bee New manuscript on Lake Rototoa in Auckland has been published!!

A new manuscript titled - Resolving 500 years of anthropogenic impacts in a mesotrophic lake: Nutrients outweigh other drivers of lake change - led by Dr Rose Gregersen (Victoria University of Wellington) has been published in the prestigious journal Environmental Science & Technology.

The research explores the history of Rototoa, a lake in the Auckland region of Aotearoa-New Zealand. The researches combined sediment core analysis with historical data, and ecological experiments to determine what was causing the decline in lake health in recent decades. 

The researchers show that the health of the lake remained stable despite catchment deforestation and erosion, and the introduction of several non-native fish species. The most significant and sustained changes in lake health coincided with nitrogen and phosphorus fertilizers in the catchment.

Congratulations Rose on your excellent research!

Visit www.lakes380.com for a link to the full manuscript.

#Lakes380 #Cawthron #GNS #ScienceLife #NZscience #research #researchLife #VictoriaUniversityofWellington #Aucklandlakes #rototoa #paleolimnology #sedimentcores
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About

  • The Project
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  • Rohe Studies
    • Rangitīkei Iwi Rohe Study
    • Wairarapa Moana iwi rohe study
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