Data comprise radionuclide activity concentrations, stable element concentrations and both radionuclide and stable element concentration ratios for vegetation and wildlife samples collected in the Chernobyl Exclusion Zone (CEZ) in 2014. Estimated absorbed dose rates for wildlife in the CEZ are also presented. Samples of soil, wild grass, earthworms, bees and other insects, small mammals, pine trees and frogs were collected in May and June 2014; frogspawn was collected in April 2015. Data were used to assess the uptake of radionuclides by wildlife living in the Chernobyl Exclusion Zone (CEZ) and also absorbed dose rates. The isotopes measured were: Americium-241, Caesium-137, Plutonium-238, -239 and -240, Strontium-90 (K-40 and U-238 activity concentrations were estimated from stable element data). Funding for this work was via the TREE project funded by the NERC, Environment Agency and Radioactive Waste Management Ltd. under the RATE programme. Full details about this dataset can be found at https://doi.org/10.5285/ae02f4e8-9486-4b47-93ef-e49dd9ddecd4

Data comprise stable element concentrations in terrestrial Reference Animals and Plants (RAPs) and corresponding whole-body concentration ratios determined in two different Mediterranean ecosystems: a Pinewood and a Dehesa (grassland with disperse tree cover). The International Commission on Radiological Protection (ICRP) RAPs considered in the Pinewood ecosystem were Pine Tree and Wild Grass; whereas in the Dehesa ecosystem those considered were Deer, Rat, Earthworm, Bee, Frog, Duck and Wild Grass. The data include: elemental concentrations in soils; elemental concentrations in plants, invertebrates, vertebrate tissues and estimated concentrations for vertebrate whole-organisms; individual concentration ratios (relating the fresh matter concentration in organisms to the dry matter concentration in soil); vertebrate species tissue masses; fresh to dry matter data for invertebrate species; geometric and arithmetic mean and standard deviation summaries for elemental concentrations and concentration ratios. Elemental concentrations presented include I, Li, Be, B, Na, Mg, Al, P, S, K. Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Rb, Sr, Mo, Ag, Cd, Cs, Ba, Tl, Pb and U. Full details about this dataset can be found at https://doi.org/10.5285/a1ab8c79-3426-43a4-ab42-6d1b218d1cc6