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Week 2 field sampling — stream or wetland macroinvertebrate survey using kick-net or hand-search techniques to infer water quality from bioindicator species.
Environmental Mātauranga • Unit 9 Week 2 • Years 7–10 • Field guide
Macroinvertebrate Field Guide
Identify bioindicator species to read the health of your local water. Combine scientific sampling with ngā tohu o te taiao — the signs the taiao uses to show us what it needs.
Free field guide, premium localisation path
If you want this guide adapted to a specific local waterway — including the macroinvertebrate species most significant to local hapū and iwi — Te Wānanga can localise it for your context.
- Add locally significant species based on iwi mātauranga of the awa.
- Include GPS sampling coordinates and photo documentation for real reporting.
- Save field data in My Kete as longitudinal records across the unit.
Kaiako planning snapshot
- Use length: 45–60 minutes for field sampling plus 20 minutes for data analysis and summary.
- Grouping: Pairs or groups of 3, each assigned a sampling station along the stream or wetland.
- Prep: Walk the sampling site beforehand. Check for hazards, confirm access permissions, and brief students on handling living organisms respectfully — including returning them to the water after observation.
- Differentiation: Entry groups focus on counting and categorising by sensitivity level only; on-level groups identify to species where possible; extension groups calculate an overall biotic index score and compare to published benchmarks.
- Neurodiversity support: Outdoor, movement-based learning works well. Allow tactile engagement with specimens — handling (with care) is more engaging than purely visual identification for many ākonga.
Resources already provided
- Organism identification and count recording table
- Sensitivity level categories (high, moderate, tolerant)
- Water quality inference from bioindicator data
- Mātauranga Māori connection — ngā tohu o te wai
- Summary and action recommendation section
- Teacher-only curriculum companion available
All field recording sections are provided. Pair with the Environmental Indicators Comparison sheet to contrast bioindicator evidence with chemical or physical water quality data collected at the same site.
Ngā Whāinga Akoranga / Learning Intentions
- We are learning to collect field data systematically and use it to draw conclusions about ecosystem health.
- We are learning to connect bioindicator science to the mātauranga Māori concept of ngā tohu o te taiao.
- We are learning to interpret what our local water is telling us and how we should respond as kaitiaki.
Paearu Angitu / Success Criteria
- I can identify at least four different types of macroinvertebrates and explain what their presence suggests about water quality.
- I can use my field data to make a reasoned conclusion about the health of the water I sampled.
- I can connect what I found to both a scientific explanation and a mātauranga Māori perspective.
Curriculum alignment / Te Marautanga o Aotearoa
This field guide develops the scientific practice of collecting and analysing ecological data — using macroinvertebrate distribution and abundance to infer ecosystem health, connecting to the NZ Curriculum's Living World strand.
Why this matters in Aotearoa
Macroinvertebrates are known to Māori as indicators of wai ora — healthy water. Many iwi use traditional water quality indicators alongside scientific methods in freshwater management today. Kōura (freshwater crayfish), kākahi (freshwater mussels), and kāeo (freshwater snails) carry deep significance in mātauranga and are sensitive bioindicators. When you count these creatures and notice their absence, you are doing the same kind of knowledge-gathering that kaitiaki have always done — reading the language of the taiao.
Wāhi tirotiro / Sampling location
Location / awa name:
Sampling method used:
Māpuna kōrero / Organism identification and count
Record what you find. If unsure, sketch or describe it. Note whether each organism is sensitive (high quality), moderate, or tolerant (low quality).
| Organism / indicator | Sensitivity | Count | Observations / sketch |
|---|---|---|---|
He aha e kī ana ngā kīngā? / What does this suggest about water quality?
Explain using evidence from your organism data:
How does this connect to what kaitiaki might observe using ngā tohu o te wai?
What action would you recommend to improve or protect this water?
Entry, on-level, and extension pathway
Entry
Choose one category. Count and sketch one organism. Circle whether water quality seems good, moderate, or poor based on your findings.
On-level
Record all organisms found. Rate each by sensitivity. Write a reasoned conclusion connecting bioindicator data to water quality and kaitiakitanga.
Extension
Calculate a biotic index score. Compare findings to regional water quality data (NIWA reports). Identify which organisms match species named in local iwi mātauranga.
Hononga Marautanga · Curriculum Alignment
Social Sciences — Ecological Sustainability
Level 3–4: investigate local environmental issues; understand that communities have responsibilities to protect the environment for future generations; develop the skills to take informed, responsible action.
Science — Living World / Planet Earth
Level 3–4: observe and describe patterns in the local environment; connect scientific observation to environmental decision-making; understand that human activity affects ecosystems and that this impact can be reduced through careful stewardship.
Aronga Mātauranga Māori
In te ao Māori, certain freshwater species are taonga — treasured in a way that reflects their ecological and cultural significance. Kōura (freshwater crayfish) and kākahi (freshwater mussels) were carefully managed by hapū for generations as both food sources and indicators of water health. Their presence meant clean, living water; their disappearance was a warning that demanded a response. Long before scientific macroinvertebrate protocols were developed, Māori communities maintained detailed knowledge of which species should be found where, in what season, and in what numbers — encoded in whakapapa and oral tradition.
The bioindicator approach you are using today is grounded in the same ecological logic: species presence tells you about water health. The difference is that mātauranga Māori embedded this knowledge in a system of responsibility. Knowing the kōura were gone was not just data — it was a call to kaitiakitanga, to rāhui, to action. As you sample today, consider what the organisms you find (or do not find) are telling you about the mauri of the water.