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Macroalgae And Phytoplankton As Indicators Of Ecological Status Of Danish Coastal Waters.pdf

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Preview of Macroalgae and phytoplankton as indicators of ecological status of Danish coastal waters
🔗 Source: www2.dmu.dk
📊 Size: 7.11 MB
👤 Author: Jacob Carstensen/ Dorte Krause-Jensen/Karsten Dahl/Peter Henriksen/Danmarks Miljøundersøgelser
⬇️ Downloads: 422

Summary

It contributes to the implementation of the Water Framework Directive by providing tools to evaluate water quality based on biological quality elements.

The study establishes nitrogen concentration boundaries for five classes of ecological status using historical nitrogen input estimates from Denmark to its straits and expert judgment of past environmental conditions. These boundaries are then used to define specific indicators for six macroalgal species in various Danish estuaries and coastal areas.

Additionally, site-specific correlations between nitrogen levels and chlorophyll a concentrations are analyzed to establish reference conditions and ecological status class boundaries for the phytoplankton metric 'mean summer concentration of chlorophyll a'. The report evaluates the precision of different chlorophyll a indicators (summer mean vs. 90th percentile) and highlights the limitations of using the 90th percentile, especially with smaller sample sizes.

Key findings include:

Macroalgae as reliable indicators: Macroalgal models effectively reflect ecological status in Danish estuaries and coastal areas.
 Nitrogen concentration boundaries: Clear nitrogen concentration thresholds define distinct ecological status classes.
* Chlorophyll a metric limitations: The 90th percentile chlorophyll a indicator is less precise than the summer mean, particularly for smaller datasets.

The report concludes with recommendations for future research and management applications based on these findings.

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Description

Published in December 2008, it is a NERI Technical Report (No. 683).

Technical Information

  • File Format: PDF
  • File Size: 7.11 MB
  • Pages: 96
  • Language: EN
  • Author: Jacob Carstensen/ Dorte Krause-Jensen/Karsten Dahl/Peter Henriksen/Danmarks Miljøundersøgelser
  • Total Downloads: 422
  • Last Updated: 3 weeks ago

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This PDF document about Macroalgae and phytoplankton as indicators of ecological status of Danish coastal waters provides comprehensive information and guidance. Whether you're a beginner or advanced user, this resource offers valuable insights into Macroalgae and phytoplankton as indicators of ecological status of Danish coastal waters.

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