Invertebrate Standards and Lakes Paul Logan

Existing CEN standards relating to the ecological assessment of freshwaters - TG1 - invertebrates Quality element: Invertebrate sampling in Freshwaters EN Methods of biological sampling - Guidance on handnet sampling of aquatic benthic macro-invertebrates EN Methods of biological sampling - Guidance on the design and use of quantitative samplers for benthic macro-invertebrates on stony substrata in shallow freshwaters EN ISO 9391 Sampling in deep waters for macro-invertebrates - Guidance on the use of colonisation, qualitative and quantitative samples Under revision Revison Document N101a Guidance on the selection of sampling methods and devices for benthic macroinvertebrates in freshwaters Describes the selection of sampling devices (design) and methods (operation and performance characteristics) to be used in order to evaluate benthic macro-invertebrate populations in rivers, canals lakes and reservoirs.

Handnet - restricted to 4m Naturalist’s dredge Berge-Eckman Ponar grab Van Veen grab Air lift sampler Finnish tube sampler Colonisation sampler Freeze corers Sampling methods - still waters

Air-Lift Sampler Design: The air-lift sampler (typically of sampling area 415cm2 and mass about 14kg) has a sampling pipe or riser… Operation: The air-lift sampler can be used to obtain quantitative samples on substrata ranging from fine grave to stones up to… Performance characteristics: Sampling Equipment for Still Waters - example (from N101a)

Guidance standard for the routine sampling of zooplankton from standing waters Current status: Formal vote procedure General procedures for surveying zooplankton in standing waters for the purposes of: water quality assessment determination of ecological status (not normative definition) Phytoplankton blooms Sampling procedures and the subsequent steps for preservation and storage are given. The sampling procedures provide a whole-lake estimate for: species occurrence abundance/biomass (relative or absolute) production of zooplankton (including spatial distribution and temporal trends) The sampling procedure may be also employed in slow running waters and canals.

Guidance on the sampling and processing of the pupal exuviae of Chironomidae (Order Diptera) for ecological assessment Current status: Formal vote procedure Specifies equipment and procedures for collecting floating pupal exuviae of Chironomidae from aquatic habitats; rivers (from source to estuary) canals ponds lakes sea coasts Guidance in preparing specimens for subsequent identification is provided. These samples provide representative data on relative species abundance, suitable for: numerical analysis classification and monitoring of environmental conditions

Guidance on the design of multimetrics Current status: Working document This European Standard establishes methods for developing and applying Multimetric Indices used for assessing: rivers lakes transitional waters wetlands It is suitable for use with data on: fish benthic invertebrates macrophytes phytoplankton and phytobenthos