Overview
ISO 19493:2007 - Water quality: Guidance on marine biological surveys of hard-substrate communities - provides standardized guidance for designing and conducting marine biological surveys on hard substrates in coastal zones. The standard covers surveys of the supralittoral, eulittoral and sublittoral zones and defines minimum requirements for environmental impact assessment and monitoring. Emphasis is placed on non-destructive, field-based recording methods (direct observation and photography) and on producing intercomparable, high-quality data for coastal management.
Key topics and technical requirements
- Scope and definitions: Clear definitions for hard substrate, macroscopic organisms, sampling station, reference station, baseline survey and temporal trend monitoring.
- Sampling programme: Guidance on planning sampling design according to survey aims, local hydrography/topography and required precision (see ISO 5667-1 referenced for sampling design).
- Survey methods: Use of semi‑quantitative and quantitative recording techniques that minimize damage to flora and fauna; methods described in Annex A. Scraping, suction sampling and heavily destructive techniques are explicitly excluded (but may be used as supplements).
- Species identification and sample processing: Field identification of macroscopic organisms (≥ 1 mm where applicable), procedures for taxon identification and storage of collected material.
- Data and material handling: Documentation, traceability and storage protocols to ensure data quality and replicability.
- Quality assurance / quality control: Requirements for standardized procedures, personnel competence, intercomparisons and laboratory accreditation where appropriate (EN 14996 referenced).
- Health and safety: Laboratory safety, chemical handling (formalins/ethanol warning), field safety, and diving/ROV requirements for sublittoral work.
- Supporting annexes: Field recording form, biological zone definitions, rationale for semi‑quantitative methods and exposure-calculation guidance.
Practical applications and users
ISO 19493:2007 is useful for:
- Environmental consultants and contractors conducting coastal environmental impact assessments (EIA) and monitoring programs
- Marine biologists and botanists performing baseline surveys or long‑term trend monitoring of hard-substrate communities
- Regulatory agencies and coastal managers setting monitoring standards or assessing compliance
- Academic researchers standardizing field protocols for intercomparability across sites and time
Practical uses include mapping species assemblages on rocky shores, monitoring effects of pollution or construction on quay/pipeline communities, and supporting management decisions with repeatable, semi‑quantitative field data.
Related standards
- ISO 5667-1 (sampling programme design)
- ISO 5667-19 (sediment sampling in marine areas)
- ISO 16665 (sublittoral soft‑bottom fauna)
- EN 14996 (quality management references for laboratory auditing)
Keywords: ISO 19493:2007, marine biological surveys, hard-substrate communities, eulittoral, sublittoral, coastal monitoring, environmental impact assessment, semi-quantitative survey.
Open preview (PDF)Water quality — Guidance on marine biological surveys of hard-substrate communities