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Normas DIN – AENOR
DIN EN ISO 19493:2005-10

DIN EN ISO 19493:2005-10

Water quality - Guidance on marine biological surveys of littoral and sublittoral hard bottom (ISO/DIS 19493:2005); German Version prEN ISO 19493:2005

Qualité de l'eau - Lignes directrices pour les études biologiques des fonds durs marins littoraux et sublittoraux (ISO/DIS 19493:2005); Version allemande prEN ISO 19493:2005

Wasserbeschaffenheit - Anleitung für meeresbiologische Untersuchungen im Litoral- und Sublitoral-Hartbodenbereich (ISO/DIS 19493:2005); Deutsche Fassung prEN ISO 19493:2005

Fecha Anulación:
2017-09 /Withdrawn
Equivalencias internacionales:

ISO/DIS 19493 (2005-08)

prEN ISO 19493 (2005-08)

Relación con otras normas DIN:

Reemplazada por: DIN EN ISO 19493:2007-09

Resumen:
Surveys of attached algae (benthic algae) and attached or slow-moving animals on hard bottom represent an important part of marine environmental surveys. The taxon composition, both in terms of the taxa present and their relative abundances, is a result of the natural and anthropogenic environmental factors at the survey site. Natural factors that affect the taxon composition include wave exposure, ice scouring, fresh water influence, food and nutrient availability, substrate composition and slope, orientation, supply of particles, current, depth, light conditions, temperature and biological interactions. Potential anthropogenic factors include pollution from oil, contaminants, particles, physical disturbance and elevated nutrient levels. A number of different methods have been used to investigate flora and fauna on hard bottom, according to the survey aim and the type of biotope surveyed. To allow environmental authorities and others to make use of this knowledge, it is essential that surveys are inter-comparable in time and space, between operators and that the data are of a high quality. This standard is based on a limited selection of methods that allow precise documentation, that are replicable and which have been tested over many years. In choosing the methods, semi-quantitative and quantitative techniques have been emphasised, i.e. such that taxa and quantities can be related to a known area of sea floor. For the purposes of this standard, hard bottom is defined as bedrock, stable rocks and fixed marine constructions (e. g. pipelines, quays and wharf, keys and pipelines pole). The main focus is community registrations based on taxa that can be recorded in the field (i.e. are visible to the naked eye). The guidelines can also be used for surveys of substrates comprising loose pebbles/boulders, stone blocks, coarse gravel and other loose material as well as bedrock covered with loose sediment, but in general, such substrates require specially adapted techniques. Additional methods are required for surveys in depths greater than approximate 30 m.
Keywords:
Aquatic biology, Biological analysis and testing, Chemical analysis and testing, Chemistry of water, Coastal zones, Consistency (mechanical property), Definitions, Depth, Instructions, Investigation methods, Investigations, Marine biology, Marine environment, Marine pollution, Payment, Physical testing, Preparation, Process description, Protocols, Quality, Quality assurance, Sample, Samples, Sampling equipment, Sampling methods, Sampling tables, Sea bed, Sea water, Seas, Seawater, Shoreline, Specimen preparation, Specimens, Standard methods, Surface water, Surveillance (approval), Taking-out, Taxonomy, Terms of payment, Testing, Water, Water analysis, Water practice, Water quality, Water testing
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