american samoa - University of Hawaii at Manoa Botany Department

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Vegetation TrendsIn 1992, Biosystems Analysis, Inc. surveyed this wetland as part of its preparation of aComprehensive Wetlands Management Plan. Biosystems Analysis, Inc. recorded mangroves atthe mouth of Faatafe Stream and described the southeast wetland as a freshwater wetland withcoconut trees.The most significant change to the wetland has been a reduction in size. In 1992, BiosystemsAnalysis estimated that the southeast wetland comprised about 18.5 acres. Between 1992 and1999, about 2 to 3 acres have been lost by land fill activities associated with the developmentof the Mormon and Methodist church complexes.Taro cultivation was no longer present within the disturbed marsh in November 1999. Formertaro cultivation may have stopped due to the taro blight that occurred in the early 1990’s.A change in the mangrove forest, just upstream of the Faatafe Stream mouth, has occurredsince 1992. Biosystems noted the presence of both red and oriental mangrove. In November1999, only oriental mangrove was recorded. This lower stream area is now best classified as afreshwater swamp forest.AQUATIC FISH AND INVERTEBRATESGeneralOn November 4, 1999, Charles Chong of thePPC field survey team made observations ofaquatic fish and invertebrates along the lower850 feet of Faatafe Stream. His observationsare summarized in the following paragraphs.Just upstream of the stream mouth and mainshoreline roadway, there was a small estuarythat was fed by surface runoff from FaatafeStream, as well as a nearby spring. During thetime of the survey, stream flow was estimatedto be less than 1 cfs.FishFishes observed in the lower estuary possessed a high species diversity and abundance ofmacrofauna. Mugil, Chanos, Periopthalmus, Eleotris, Kuhlia and Stenogobius weredocumented within the estuary.Exotic Poecilia were abundant in the estuary and along the stream. Stiphodon, Anguilla, andKuhlia spp. were common at lower and higher stream elevation.American Samoa Wetland/Stream Restoration and Enhancement PlanFebruary 2001, Vatia Wetland, Page 5-7
InvertebratesCrustacean densities were high for Macrobrachium lar and Paleomon at lower and higherstream elevations. Caridina was common at higher stream elevations.Three neritids were present at lower elevations. However, the two largest species wererecorded at a higher stream elevation.Relative Abundance and Diversity of Fish and InvertebratesA site specific summary of macrofaunal organisms observed during the survey is summarizedin Table 5-2. Genera are listed in order of descending abundance within their taxonomic group.TABLE 5-2SUMMARY OF MACROFAUNAL ORGANISMSOBSERVED WITHIN VATIA WETLANDStream Location Fishes Crustaceans MolluscsFaatafe stream mouth to 330feet upstreamFaatafe Stream (about1,250-1,350 feet upstreamof stream mouthSource: Chong, 2000KuhliaPoecilia (2 spp.)MugilPeriopthalmusEleotrisSicyopterusAnguillaStenogobiusChanosKuhliaPoeciliaSicyopterusAnguillaMacrobrachiumPaleomonMacrobrachiumPaleomonCaradinaNeritina (3 spp.)Neritina (2 spp.)The relative abundance and diversity of fish and invertebrates observed within the Vatiawetland are summarized in Table 5-3. The characterization of relative abundance and diversityreflects a general comparison of the abundance and diversity of fish and invertebrates observedalong two segments of Faatafe Stream with all 10 sites evaluated for the Wetland Restorationand Enhancement Plan.TABLE 5-3RELATIVE ABUNDANCE AND DIVERSITY OF FISHAND INVERTEBRATES IN FAATAFE STREAMFishes Crustaceans MolluscsAbundance High High MediumDiversity High Medium HighSource: Pedersen Planning Consultants, 2000American Samoa Wetland/Stream Restoration and Enhancement PlanFebruary 2001, Vatia Wetland, Page 5-8
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Asili StreamAMERICAN SAMOAWETLAND/S
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American SamoaWetland/Stream Restor
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American Samoa Wetland/Stream Resto
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Figure 1-1Location of Potential Wet
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Onsite InvestigationsNovember 1999G
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Where appropriate, stream cross sec
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Chapter TwoTULA WETLANDLOCATIONTula
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Figure 2-2Tula WetlandExisting Cond
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Improved channelization of stormwat
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LAND USES IN THE VICINITY OF TULA W
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Figure 2-3Option 2: Detention of St
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Figure 2-4Option 3: Expansion of Ta
Page 29 and 30: Comparative Benefits and ImpactsPPC
Page 31 and 32: TABLE 2-4PRELIMINARY COST ESTIMATEP
Page 33 and 34: TABLE 2-5LONG-TERM RESOURCE MONITOR
Page 35 and 36: TABLE 2-6 (CONTINUED)FIELD MONITORI
Page 37 and 38: Chapter ThreeALAO WETLANDLOCATIONAl
Page 39 and 40: Figure 3-2Taufusi MarchExisting Con
Page 41 and 42: Figure 3-3FEMA 100-Year Flood Plain
Page 43 and 44: East Portion of the MarshThe impact
Page 45 and 46: WETLAND RESTORATION AND ENHANCEMENT
Page 47 and 48: The availability of new, blight-res
Page 49 and 50: Long-Term Monitoring and Site Maint
Page 51 and 52: TABLE 3-7FIELD MONITORING WORKSHEET
Page 53 and 54: Recommended monitoring stations or
Page 55 and 56: Figure 4-1Location MapAoa Village W
Page 57 and 58: No stream flow estimates are availa
Page 59 and 60: Fresh-Water SwampThe fresh-water sw
Page 61 and 62: ecome dominant if there is a nearby
Page 63 and 64: Relative Abundance and Diversity of
Page 65 and 66: Option 4: Restore Mangrove Forest U
Page 67 and 68: TABLE 4-5COMPARATIVE EVALUATIONWETL
Page 69 and 70: Long-term resource management activ
Page 73 and 74: • begin at the Tapua Stream mouth
Page 75 and 76: Figure 5-1Location MapSoutheast Wet
Page 77 and 78: Tufu Stream and two stream branches
Page 79: Mr. Whistler was part of a three-pe
Page 83 and 84: FIGURE 5-3OPTION 1: RESTORE RIPARIA
Page 85 and 86: TABLE 5-4COMPARATIVE EVALUATIONWETL
Page 87 and 88: Long term monitoring of the Vatia w
Page 91 and 92: More specific monitoring of stream
Page 93 and 94: Figure 6-1Location MapVaipito Strea
Page 95 and 96: Stream FlowsHistorical Stream Flows
Page 97 and 98: California grass (Brachiaria mutica
Page 99 and 100: FIGURE 6-3FISH AND INVERTEBRATE SUR
Page 101 and 102: Most of lower Vaipito Stream segmen
Page 103 and 104: Red mangrove should be planted with
Page 105 and 106: TABLE 6-7PRELIMINARY COST ESTIMATEC
Page 109 and 110: TABLE 6-10 (Continued)FIELD MONITOR
Page 111 and 112: Vehicular and pedestrian access to
Page 113 and 114: Figure 7-1Location MapLeele-Papa-Ta
Page 115 and 116: Stream flow, in some cases, is cons
Page 117 and 118: Stormwater Discharges and Related F
Page 119 and 120: AQUATIC FISH AND INVERTEBRATESGener
Page 121 and 122: Opportunities and StrategiesOption
Page 123 and 124: Figure 7-3Option 2: Reduction of Er
Page 125 and 126: TABLE 7-8PRELIMINARY COST ESTIMATEP
Page 129 and 130: TABLE 7-10 (Continued)FIELD MONITOR
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More specific monitoring of stream
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Figure 8-1Location MapSauino Stream
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Stream FlowsHistorical Stream Flows
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AQUATIC FISH AND INVERTEBRATESGener
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Figure 8-3Option 1: Construction of
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FIGURE 8-5OPTION 2: PLANT NATIVE RI
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Long-Term Monitoring and Site Maint
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TABLE 8-8FIELD MONITORING WORKSHEET
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TABLE 8-8 (Continued)FIELD MONITORI
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LOCATIONChapter NineLEAFU STREAMLea
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Figure 9-2Leone Pala and 300-Foot L
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However, during and following heavi
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Vegetation TrendsThe lower Leafu St
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LAND USES ADJACENT TOLOWER LEAFU ST
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Option 2: Construct Basaltic Wall,
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Figure 9-5:Stabilize East Stream Ba
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TABLE 9-7PRELIMINARY COST ESTIMATEP
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TABLE 9-8LONG-TERM RESOURCE MONITOR
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TABLE 9-9 (Continued)FIELD MONITORI
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Chapter TenASILI STREAMLOCATIONAsil
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Figure 10-2Asili Stream SegmentExis
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Stormwater Discharges and Related F
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Further downstream, the stream chan
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TABLE 10-4SUMMARY OF MACROFAUNAL OR
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American Samoa Wetlands/Streams Res
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CLEAN-UP OF LOWER ASILI STREAMLABOR
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TABLE 10-9LONG-TERM RESOURCE MONITO
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TABLE 10-10 (Continued)FIELD MONITO
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Vehicular and pedestrian access to
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Figure 11-1Location MapFusi Wetland
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WETLAND VEGETATIONNovember 1999 Sur
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The lack of stream flow entering th
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Figure 11-3Option 1: Remove Solid W
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Recommended Option and Estimated Pr
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TABLE 11-6FIELD MONITORING WORKSHEE
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Any future monitoring stations or s
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Project ManagerRepresentatives of a
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REFERENCESBiosystems Analysis, Inc.
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APPENDIX ASUMMARY OFPLANTSOBSERVED
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Species Family EnglishNameSamoanNam
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APPENDIX CSUMMARY OFAQUATIC MACROFA
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american samoa - University of Hawaii at Manoa Botany Department

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