Eleven elements

Hyperaccumulation is defined element by element. Six primary groups carry the bulk of the known species; five further elements are tracked because genuine accumulators exist but are rarer or their records need caution.

Primary groups

Ni Nickel > 1,000 µg g⁻¹ 20 species Zn Zinc > 3,000 µg g⁻¹ 7 species Cd Cadmium > 100 µg g⁻¹ 7 species Co Cobalt > 300 µg g⁻¹ 4 species Mn Manganese > 10,000 µg g⁻¹ 6 species REE Rare Earth Elements > 1,000 µg g⁻¹ ΣREE 3 species

Tracked elements

Cu Copper > 300 µg g⁻¹ 3 species As Arsenic > 1,000 µg g⁻¹ 2 species Se Selenium > 100 µg g⁻¹ 3 species Tl Thallium > 100 µg g⁻¹ 2 species Pb Lead > 1,000 µg g⁻¹ 1 species