A simple method for sampling invertebrate drift in large rivers and boulder‐bed streams. (28th March 2019)

• Record Type: Journal Article
• Authors: Rosenfeld, Jordan S.; Naman, Sean M.
• Is Part Of: River research and applications. Volume 35:Number 4(2019)
• Page Start: 442
• Page End: 447
• Publication Date: 2019-03-28
• Subjects: drift net -- drift sampling -- invertebrate drift -- stream; Rivers -- Regulation -- Periodicals; Rivers -- Periodicals; 551.483
• DOI: 10.1002/rra.3424
• Languages: English
• ISSNs: 1535-1459

Abstract

Abstract: Sampling invertebrate drift in high‐gradient boulder‐bed channels or large turbulent rivers is challenging, because the traditional approach of driving stakes into the stream bed to secure drift nets may not work. We describe a simple method using a split wading rod to collect drift samples from the wadeable river margin or bank as an alternative method for rapid assessment of invertebrate drift when boat access is not possible. Pilot sampling in a large river shows that near‐shore drift samples collected with this approach are broadly similar to samples collected from the centre of the channel using more conventional methods, although our results suggest that depth and velocity effects may cause drift concentrations to be elevated closer to the bank.