Variation Among Species and Populations, and Carry-Over Effects of Winter Exposure on Mercury Accumulation in Small Petrels

نویسندگان

چکیده

Even in areas as remote the Southern Ocean, marine organisms are exposed to contaminants that arrive through long-range atmospheric transport, such mercury (Hg), a highly toxic metal. In previous studies inter-specific differences Hg contamination seabirds was generally related their distribution and trophic position. However, Blue Petrel ( Halobaena caerulea ) notable exception among small seabirds, with higher levels than expected. this study, we compared of Petrels Thin-billed Prions Pachyptila belcheri ), which both spend non-breeding season polar waters, Antarctic desolata winter subtropical waters. We collected body feathers blood samples, representing exposure during different time-frames. concentrations feathers, reflect throughout annual cycle, were δ 13 C values, varied ocean basin species. from breeding colonies southeast Pacific Ocean had much feather expected after accounting for latitude low positions. Both 15 N samples lower at end start period, indicating marked decline positions, carry-over burdens between wintering periods. Elevated may greater reliance on myctophids or foraging sea-ice environments. Our study underlines prey consumed determine well into season.

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ژورنال

عنوان ژورنال: Frontiers in Ecology and Evolution

سال: 2022

ISSN: ['2296-701X']

DOI: https://doi.org/10.3389/fevo.2022.915199