Spatial segregation contrasting dietary overlap: niche partitioning of two sympatric alcids during shifting resource availability

Interspecific interactions help to shape individual- and population-level dynamics. As such, similar species breeding sympatrically are expected to have a high potential for competition and, thus, may have developed strategies to reduce niche overlap to allow coexistence. We combined GPS tracking and stable isotope analysis (δ15N, δ13C) to simultaneously compare multiple behavioral and dietary niche dimensions of common murres (Uria aalge) and...