Mercury concentrations in seaside sparrows (Ammospiza maritima) and marsh rice rats (Oryzomys palustris) and estimates of stable nitrogen and carbon isotopes in Barataria Bay and Breton Sound, 2015-03-18 to 2016-06-27

This dataset contains estimates of total mercury (THg) concentration in the blood of seaside sparrows (Ammospiza maritima) and marsh rice rats (Oryzomys palustris) in marshes west and east of the Mississippi River from 2015-03-18 to 2016-06-27. In addition, estimates of stable nitrogen (δ15N) and carbon (δ13C) isotope values in Barataria Bay and Breton Sound, as proxies of trophic position and the source of primary production, are also included.