The effects of gravel bar construction on breeding long-billed plovers

  • Published source details Katayama N., Amano T. & Ohori S. (2010) The effects of gravel bar construction on breeding long-billed plovers. Waterbirds (formerly Colonial Waterbirds), 33, 162-168.


This study is summarised as evidence for the following.

Action Category

Remove problematic vegetation

Action Link
Bird Conservation
  1. Remove problematic vegetation

    A before-and-after study on the middle reach of the Tama River, Honshu, Japan (Katayama et al. 2010), found that the number of long-billed plovers Charadrius placidus observed in the study area increased significantly following the removal of invasive black locust Robinia pseudoacacia from river islands in 2001-2 to expose bare ground, which was then covered in gravel to create gravel and sand bars (0.4 plovers/observation trip, n = 15 trips in 2001 vs. 4 plovers/trip, n = 25 in 2002; 19 plovers/trip, n = 19 in 2004; 11 plovers/trip, n = 7 in 2006. The increase from 2001 to 2002 was significant). Hatching rates were extremely variable in the study area (19% in 2006 vs. 100% in 2003) and could not be compared with earlier studies or studies from other sites due to incomplete data and different survey methods.


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