down-river assessment€¦ · down-river assessment mapping macca habitat and threatening processes...
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Down-River Assessment
Mapping Macca Habitat
And
Threatening Processes
FMR AGM Presentation by Su Wild-River
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Overview
• Mongarlowe downriver assessment summary
• 68 potential habitat sites
• Results using adapted national protocols
• Threatening processes
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Mongarlowe Downriver Assessment
3+ people, 5 days = 61km of ‘bucket science’
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Habitat68 potential breeding sites
• Aerated riffles
• Deep pool
• Bedrock
Assessed using adapted protocols
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Habitat for more than the maccas
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National Protocols
•Rapid Appraisal of Riparian Condition
•Riverstyles
•In-Stream Assessment
•Water Quality
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Rapid Appraisal of Riparian Condition
Rich mix of trees, shrubs, sedges,
grasses, rushes, floating large
plants, submerged large plants,
fallen logs
5 =
50-100%
1 =
1-6%
2 =
6-12%
4 =
25-50%
3 =
12-25%
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River Style
•Mostly partly-confined
•Mostly good condition
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In-stream assessment
•Slow pools, moderate-
fast riffles
•Substrate dominated by
cobble, bedrock and
boulders
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Water quality
• Mostly clear
• Shallow to >6m
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Threatening Processes
• Development
• Clearing
• Stock Watering
• Sedimentation
• Gambusia
• Carp
• Weeds
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Development
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Clearing
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Stock Watering
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Sedimentation
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Gambusia
Mosquitofish present in lower reaches.
Aggressively chase and fin-nip other species.
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Carp
Carp present in lower-mid reaches. Aggressively
Increase turbidity and can undermine banks
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Weeds – 130 willows
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Weeds – long blackberry patches
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Weeds – unidentified aquatic weed
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Weeds – patches of honeysuckle, apples,
pines, briar etc
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Summary• Cobble, boulder and bedrock substrate
• Intact riparian zone
• Clear, clean water
• Few weeds
• Few feral fish
• Abundant native wildlife
• Minimal clearing, grazing and sedimentation
• Community conservation Priorities….