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Raumanga at Raumanga Valley Park

The Raumanga Stream has three main tributaries (the Te Hihi, Nihotetea, and Waiponamu streams) which drain predominatley rural lifestyle areas before flowing through the suburb of Raumanga and into the Whangarei Harbour.

Can I Swim Here?
Ecology
Ecological data for this site

This dashboard shows information on macroinvertebrate data collected by regional councils and unitary authorities.  QMCI and ASPM data will be added in October 2021.  Select an indicator to see the available historical results.

Select trend period for MCI

  • 10 years
  • 15 years
  • MCI

    5-year median: {{medians.MciMedian}}

    State

    {{medians.MciState.Text | uppercase}}

    Trend
    {{medians.MciTrend[selectedTrendPeriod].Text}}
    The Macroinvertebrate Community Index uses aquatic macroinvertebrates to assess the health of streams in New Zealand.

    MCI sample history at this site

    Showing:
    MCI for Raumanga at Raumanga Valley Park
    MCI score

    What is this graph showing me?

    This graph is displaying MCI scores over the selected time period.  You can adjust this period by changing the dropdowns.  These records for the basis for the state and trends displayed on the dashboard.

    Find out about how State and Trend are calculated.

    What do the NOF icons mean?

    A
    Macroinvertebrate community indicative of pristine conditions with almost no organic pollution or nutrient enrichment.
    B
    Macroinvertebrate community indicative of mild organic pollution or nutrient enrichment. Largely composed of taxa sensitive to organic pollution/nutrient enrichment.
    C
    Macroinvertebrate community indicative of moderate organic pollution or nutrient enrichment. There is a mix of taxa sensitive and insensitive to organic pollution/nutrient enrichment.
    National bottom line: MCI score 90
    D
    Macroinvertebrate community indicative of severe organic pollution or nutrient enrichment. Communities are largely composed of taxa insensitive to inorganic pollution/nutrient enrichment.
  • Taxonomic richness

    The median of the last 5 years of data

    {{medians.TaxaMedian || 'N/A'}}
    Taxonomic richness is the number of different taxa present in an ecological community identified to the best possible level.

    Taxa richness history at this site

    Showing:
    Taxa richness for Raumanga at Raumanga Valley Park
    Number of taxa

    What is this graph showing me?

    This graph is displaying Taxonomic richness over the selected time period.  You can adjust this period by changing the dropdowns.  These records for the basis for the state displayed on the dashboard.

  • Percent EPT richness

    The median of the last 5 years of data

    {{medians.EptMedian}}
    EPT are macroinvertebrates that are sensitive to water pollution. These are Ephemeroptera (mayfly), Plecoptera (stonefly) and Trichoptera (caddisfly).

    EPT history at this site

    Showing:
    Percent EPT richness for Raumanga at Raumanga Valley Park
    EPT %

    What is this graph showing me?

    This graph is displaying percent EPT taxa over the selected time period.  You can adjust this period by changing the dropdowns.  These records for the basis for the state displayed on the dashboard.

Can I trust this data?

The Cawthron Institute has worked alongside regional councils to verify the processes and methods used for macroinvertebrate data collection, processing of the data in the laboratory, quality control in the field and laboratory and the statistical analysis and interpretation of the results presented.

For more details on each tick, see our 'Can I Trust this Data?' Factsheet.

Can I trust the data for this site?
Data Collection

Macroinvertebrates are sampled at this site as part of council's stream health monitoring programme.

Sampling - Frequency

Macroinvertebrate sampling is done annually or more frequently at this site.  Annual sampling provides enough data points for state and trend analyses to be calculated with sufficient statistical power for trend detection.

Sampling - Protocols

This site is a hard-bottomed site and appropriate sampling protocols have been applied.  Data shown here have been collected using current best-practice based on Stark et al. (2001).

Sampling - Habitat

Macroinvertebrate sampling is done in riffle habitat at this site. Data shown here are therefore following best practice as described in Stark et al. (2001).

Sampling - Stand-down period

This council does not collect any macroinvertebrate samples for up to two weeks after a flood greater than three times the median flow as recommended by Stark et al. (2001). Therefore, data collected at this site is following best practice.

Processing - Protocol

Samples at this site have been processed following sampling protocol P1 (semi-quantitative - coded abundance). Data shown here is not following best practice as described by Stark et al. (2001), but are still considered robust.

Quality Control - Field

Field data collected at this site had no quality control applied to it.

Quality Control - Lab

Data processed at this site has had one of the three Laboratory Quality Control Protocols (i.e., QC1, QC2,Q C3) applied. Data shown here is more robust than data with no laboratory QC applied.