Mercury exposure in an endangered songbird: influence of marsh hydrology and evidence for early breeding impairment.

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Tác giả: Peter Frederick, Alan J Mock, Tera A Reed, Ignacio Rodríguez-Jorquera, Sarah E Rothenberg, Joel C Trexler, Thomas Virzi

Ngôn ngữ: eng

Ký hiệu phân loại: 721.44 Groined vaults

Thông tin xuất bản: United States : Ecotoxicology (London, England) , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 700852

Songbird reproductive success can decline from consuming mercury-contaminated aquatic insects, but assessments of hydrologic conditions influencing songbird mercury exposure are lacking. We monitored breast feather total mercury (THg) concentrations and reproductive success in the U.S. federally listed endangered Cape Sable Seaside Sparrow (CSSS: Ammospiza maritima mirabilis) over three breeding seasons in the Florida Everglades. We used model comparison to explore the influence of annual hydrologic variation on adult CSSS THg concentrations, and tested mercury effects on individual reproductive success (individuals' mate status, apparent nest success, and total productivity) that were scaled to estimates on population productivity using a demographic model. We identified four hydrologic models that explained annual variation in adult THg concentrations, with the top model showing a negative association between THg concentrations and drought length of the previous breeding season and a positive association between THg concentrations and dry-season water recession rate (model adjusted R
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