piersmai Red Knot migration in the EAAF

The migration of Red Knots Calidris canutus piersmai, from Roebuck Bay and 80 Mile Beach has been a long term study. In recent years the establishment of a regular monitoring programme at the Luannan Coast, Bohai Bay, China by GFN and Beijing Normal and Forestry universities has shed some light on the northward migration. Then after many attempts with geolocators and satellite transmitters GFN published a paper with the work led by Eva Kok, Ginny Chan and Theunis Piersma.

And, now Eva has produced this beautiful visual depiction of Red Knots migrating north and south.

This graphic was produced using the R package moveVis (Schwalb-Willmann et al. 2020).

Schwalb-Willmann, J.; Remelgado, R.; Safi, K.; Wegmann, M. (2020). moveVis: Animating movement trajectories in synchronicity with static or temporally dynamic environmental data in R. Methods Ecol Evol. 2020; 11: 664–669.

One aspect of the Red Knot migration, that we are certain is vital to the current populations and their migration strategies, is the distribution of the small bivalve Potamocorbula laevis. See the latest Bohai Northward Migration report recently posted and the paper led by Hebo Peng on the this topic Homogenizing effect of aquaculture on mudflat biodiversity China-Peng et al.

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