期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 596, 期 -, 页码 69-78出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2017.04.026
关键词
Horseshoe crab; Trace elements; Sediment; Pore water; Embryos; Larvae
资金
- Wilderness Medical Society Herbert N. Hultgren grant
- Texas State University
During early development, benthic organisms can accumulate nonessential trace elements through aqueous and particulate sources. This study investigated the accumulation of Ag, As, Cd, Cr, Hg and Pb in Atlantic horseshoe crab (Limulus polyphemus) pre-spawned eggs, embryos, and developing larvae collected from 5 sites on Long Island, NY and compared these concentrations to that found in sediment, pore water, and overlying water. All investigated elements were detected in embryos and larvae at all sites. Arsenic was found at the highest concentration in each life stage across all 5 sites, followed by Ag, whereas Cd, Hg and Pb concentrations varied between sites. Chromium was not detected in pre-spawned eggs, but was present in embryos and larvae at all sites, however, along with Hg, significantly increased from embryo to larvae at most sites. We conclude that observed accumulation patterns are likely a result of abiotic factors, differences in uptake pathways between life stages and the rate of excretion. Future laboratory studies are required to understand the factors influencing the aqueous and dietary uptake of nonessential trace elements in the early life stages of Atlantic horseshoe crabs. (C) 2017 Elsevier B.V. All rights reserved.
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