Community‐level indicators can obscure species‐level changes within animal assemblages

Research Highlight discussing: Zhang, Y.‐M., Li, J., Yang, Z., Zhang, L., Wang, Y., Piersma, T., & Peng, H.‐B. (2026). Dynamic conservation under shared pressures: Apparent stability masks species‐specific redistribution in staging shorebirds. Journal of Applied Ecology , 63(8), e70558. https://doi.org/10.1111/1365‐2664.70558 .

Community‐level metrics are widely used in wildlife monitoring to inform conservation efforts. However, within multi‐species assemblages, there is a risk that community‐level metrics can obscure specific responses of individual species to environmental perturbations.

In a recent study, Zhang et al. (2026) reported that despite apparent stability in the total abundance, distribution and phenology of 48 shorebird species staging along the southern Yellow Sea coast, individual species showed evidence of marked changes in all three metrics. Declining shorebird species staged earlier and shifted northwards into the area with the highest prey densities, whereas the shorebird species with increasing population trajectories staged later and expanded southwards.

The apparent stability suggested by the community‐level indicators of the shorebird assemblage therefore obscures a growing conservation risk for the declining species, whereby staging numbers are concentrating within a limited prey‐rich area, increasing their vulnerability to factors which disturb or exclude the birds from this critical habitat.

Synthesis and applications . These findings highlight the need to carefully consider when and how to use community versus species‐level indicators in wildlife monitoring to ensure the timely and accurate identification of the species and locations for which management is most needed.