Water eDNA filter types. 1: Open filters are exposed to the air during filtration either in the field or lab (a and b). 2: Housed filters are a membrane placed in a solid unit during filtration (c). Filters from Open and Housed units need to be removed from the filtration unit and stored in a petri dish or eppendorf tube until extraction (c and d). 3: Enclosed filters are systems in which the membrane is enclosed within the outer housing (e and f). Extraction is carried out directly from the enclosed filtration unit.

  Part of: Bruce K, Blackman R, Bourlat SJ, Hellström AM, Bakker J, Bista I, Bohmann K, Bouchez A, Brys R, Clark K, Elbrecht V, Fazi S, Fonseca V, Hänfling B, Leese F, Mächler E, Mahon AR, Meissner K, Panksep K, Pawlowski J, Schmidt Yáñez P, Seymour M, Thalinger B, Valentini A, Woodcock P, Traugott M, Vasselon V, Deiner K (2021) A practical guide to DNA-based methods for biodiversity assessment. Advanced Books. https://doi.org/10.3897/ab.e68634