Fremantle Port Inner Harbour and Channel ... - Fremantle Ports

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Figure 3.3Changes in benthic habitat within Gage Roads between December 2009 andDecember 201122 Oceanica: Fremantle Ports: FP – Gage Roads Offshore Disposal Area Seagrass Recovery Project, Phase I – Initial Survey
3.2 Seagrass recovery3.2.1 Seagrass density baseline dataDuring the Phase I survey, mean shoot counts for P. angustifolia ranged from 12 shoots perm 2 (at site 37D) to 407 shoots per m 2 (at site SH50) (Figure 3.4). Summarised seagrassshoot density data are included as a table within Appendix E.500450400350Shootcount(m 2 )300250200150100500Disturbed Transition UndisturbedBars indicate mean (n=15) ± 2 seFigure 3.4Baseline mean seagrass shoot countsSeagrass shoot density within each zone ranged from:12-240 shoots per m 2 at disturbed sites;100-293 shoots per m 2 at transition sites; and257-407 shoots per m 2 at undisturbed sites.Seagrass shoot density data from IHD baseline ('undisturbed') sites (SH32, SH50 and SH51)collected in November 2010 were between 591-605 shoots per m 2 , which are about twice thedensity recorded in the same undisturbed sites of this survey (257-407 shoots per m 2 ).Results from this survey are within the overall range in shoot densities (284-630 shoots perm 2 ) recorded throughout the IHD monitoring program at sites SH32, SH50 and SH51 and arecomparable and within the range of 'natural' variability in seagrass density previouslydescribed for this depth (Oceanica 2010c).Statistically significant differences (P values < 0.05) in mean seagrass shoot density occurredbetween all zones (undisturbed, transitional and disturbed) (Table 3.2 and Table 3.3).Oceanica: Fremantle Ports: FP – Gage Roads Offshore Disposal Area Seagrass Recovery Project, Phase I – Initial Survey 23
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Fremantle Port Inner Harbour and Ch
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Client: Fremantle PortsDocument his
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ContentsExecutive Summary .........
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Executive SummaryProject StatusFrem
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1. Introduction1.1 Background and p
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Figure 1.1Dredge areas, reclaimed a
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Table 2.2 Audit tableAuditCode801:M
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AuditCodeSubject Action How Evidenc
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3. Annual Survey Footprint of Offsh
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Figure 3.2 Differences in bathymetr
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A one in five year storm event (as
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5. SummaryThere were zero non-compl
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6. ReferencesDEC (2009) Guidelines
Page 33 and 34: STATUS OF THIS DOCUMENTThis documen
Page 35 and 36: Report shall be 15 months from the
Page 37 and 38: 6-3 If the Water Quality Monitoring
Page 39: Table 2: Summary of key proposal ch
Page 47: Fremantle Ports1 Cliff StreetFREMAN
Page 51: Fremantle Ports - Gage RoadsOffshor
Page 55: Client: Fremantle PortsRevisions hi
Page 58 and 59: Figure 1.1Figure 1.2Figure 1.3Figur
Page 61 and 62: Executive SummaryOceanica Consultin
Page 63 and 64: 1. Introduction1.1 BackgroundThe Ga
Page 65 and 66: Figure 1.2Gage Roads habitat map in
Page 67 and 68: Figure 1.3Bathymetry for Gage Roads
Page 69 and 70: Figure 1.4 Benthic habitat within G
Page 71 and 72: 2. Methods2.1 Benthic habitat surve
Page 73 and 74: 2.2 Seagrass recovery2.2.1 Permanen
Page 75 and 76: Table 2.1Seagrass sites, zone desig
Page 77 and 78: Table 2.3Limits of Reporting (LOR)
Page 79 and 80: Sediment nutrients and metalsNutrie
Page 81 and 82: 3. Results3.1 Benthic habitat mapA
Page 83: Figure 3.2 Benthic habitat post dis
Page 87 and 88: Table 3.4PERMANOVA table of results
Page 89 and 90: Table 3.7Data ranges and detection
Page 91 and 92: The bathymetry data for December 20
Page 93 and 94: Bathymetry data from December 2011
Page 95 and 96: 4. DiscussionWithin the Offshore Di
Page 97 and 98: 6. AcknowledgementsThis report was
Page 99: Appendix AGeo Oceans Report
Page 102 and 103: Benthic Habitat AssessmentTowed Vid
Page 104 and 105: 1. IntroductionGeo Oceans was commi
Page 106 and 107: Table 2 Tide predictions for the Po
Page 108 and 109: Figure 1 Substrate and biota habita
Page 110 and 111: Figure 2 Depth data collected durin
Page 112 and 113: Appendix 1: Video analysis biologic
Page 115: Appendix BGeoImage Report
Page 118 and 119: Table of ContentsIntroduction......
Page 120 and 121: Figure 1: Study site overview for s
Page 122 and 123: Project 1Project 1 aimed to generat
Page 124 and 125: Figure 2: Tier 1 classification res
Page 126 and 127: Limitations and assumptionsA number
Page 129: Appendix CSeagrass Monitoring Site
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Appendix ESeagrass Shoot Count Data
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Appendix GSediment Field Log
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Appendix INutrient and Metals Data
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MarineandFreshwaterResearchLaborato
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