Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

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Model Results and Variables

 Blue = this sample. Boxplots = range of all samples. Grey shaded areas = range of reference sites

Additional Metrics

Stream Characteristics and Water Chemistry

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Taxa List (See key at end of report)
Name Group RA RB Oxy Sap Sal Tr Mot GF Tol TN TP
Achnanthidium deflexum pennate diatom 0.319 0.189 1 2 3 N P 43.5 40 52
Phormidium formosum filamentous cyanobacteria 0.189 0.010 42.6 23 NA
Achnanthidium minutissimum pennate diatom 0.132 0.038 1 2 2 7 N P 41.2 NA NA
Nostoc filamentous cyanobacteria 0.125 0.041 NA NA NA
Phormidium tergestinium filamentous cyanobacteria 0.039 0.009 42.6 53 NA
Gomphonema kobayasii pennate diatom 0.023 0.039 N S 71.2 50 79
Synedra rumpens pennate diatom 0.022 0.026 2 2 N E 34.3 20 32
Reimeria sinuata pennate diatom 0.019 0.020 1 2 2 3 M P 60.9 65 88
Scenedesmus denticulatus colonial green 0.017 0.002 NA NA NA
Rossithidium linearis pennate diatom 0.010 0.005 V P 32 24 56
Oedogonium filamentous green 0.009 0.015 37.6 27 47
Gomphonema augur pennate diatom 0.007 0.082 1 2 2 4 N S NA NA NA
Navicula cryptotenella pennate diatom 0.007 0.012 2 2 7 M P 44.6 61 82
Cocconeis placentula var. lineata pennate diatom 0.007 0.013 3 2 2 5 N P 51.5 62 82
Fragilaria capucina var. gracilis pennate diatom 0.007 0.011 1 1 2 2 N V 30.6 18 22
Cocconeis placentula var. euglypta pennate diatom 0.007 0.011 3 2 2 5 N P 58.2 45 81
Cymbella tumida pennate diatom 0.006 0.137 1 1 2 4 V S 57.8 48 78
Ulnaria ulna pennate diatom 0.004 0.097 3 4 2 N E 34.2 17 21
Gomphonema clevei pennate diatom 0.004 0.014 N S 31.3 NA NA
Melosira varians centric diatom 0.003 0.020 3 3 2 5 N U 67 67 89
Staurosirella pinnata pennate diatom 0.003 0.006 1 2 2 7 N V 44.2 38 56
Staurosira construens pennate diatom 0.003 0.005 1 2 2 4 N V 46.8 30 58
Gomphonema parvulum pennate diatom 0.003 0.004 4 4 2 5 N S 42.2 21 NA
Staurosira construens var. venter pennate diatom 0.003 0.001 1 2 2 4 N V 41.3 35 67
Planothidium rostratum pennate diatom 0.002 0.001 3 3 2 5 V P 56.6 48 96
Karayevia clevei pennate diatom 0.002 0.002 2 2 2 4 V P 54.3 NA 72
Fragilaria perminuta pennate diatom 0.002 0.002 N V NA NA NA
Cymbella cistula pennate diatom 0.002 0.125 2 2 2 5 V S 23.7 NA NA
Amphipleura pellucida pennate diatom 0.002 0.010 2 4 2 2 M P 43.8 20 59
Encyonema minutum pennate diatom 0.002 0.004 2 V S 50.2 21 NA
Microcystis aeruginosa cyanobacteria 0.002 0.000 NA NA NA
Navicula cryptocephala pennate diatom 0.002 0.003 3 3 2 7 M P 56.3 55 80
Brachysira microcephala pennate diatom 0.001 0.001 2 1 2 2 M P 18 12 18
Nitzschia dissipata pennate diatom 0.001 0.001 2 2 2 4 H P 60.9 48 75
Cyclotella meneghiniana centric diatom 0.001 0.000 5 4 3 5 N U 72.6 55 73
Eolimna minima pennate diatom 0.001 0.000 4 4 2 5 M P 57 64 88
Navicula notha pennate diatom 0.001 0.001 M P 37.4 20 34
Navicula radiosa pennate diatom 0.001 0.005 2 2 2 4 M P 41.8 34 73
Nitzschia dissipata var. media pennate diatom 0.001 0.001 2 H P 64.7 NA NA
Nitzschia gracilis pennate diatom 0.001 0.001 2 2 1 3 H P 46.9 22 64
Nitzschia lacuum pennate diatom 0.001 0.001 1 1 2 3 H P 64 NA NA
Nitzschia subacicularis pennate diatom 0.001 0.000 1 2 2 7 H P NA NA NA
Fragilaria tenera pennate diatom 0.001 0.004 1 1 1 2 N V 31.9 27 41
Fragilaria vaucheriae pennate diatom 0.001 0.001 3 3 2 5 N V 44.2 36 NA
Fragilaria sepes pennate diatom 0.001 0.001 1 1 1 2 N V 32.1 18 39
Navicula tripunctata pennate diatom 0.001 0.008 2 2 2 5 M P 69.4 76 88
Psammothidium subatomoides pennate diatom 0.001 0.000 1 1 1 2 V P 42.4 20 35
Navicula trivialis pennate diatom 0.001 0.005 3 3 3 5 M P 78.6 68 98
Navicula utermoehlii pennate diatom 0.001 0.001 1 2 3 M P NA NA NA
Nitzschia palea var. debilis pennate diatom 0.001 0.000 1 1 1 H P 53.4 47 79
Navicula veneta pennate diatom 0.001 0.001 4 4 3 5 M P 79.7 51 62
Navicula viridula pennate diatom 0.001 0.010 2 3 2 5 M P 70.7 74 NA
Nitzschia perminuta pennate diatom 0.001 0.001 1 1 2 2 H P 56.7 53 76
Cavinula pseudoscutiformis pennate diatom 0.001 0.001 2 2 2 4 M P NA NA NA
Frustulia krammeri pennate diatom 0.001 0.001 1 1 1 1 M P 20.3 38 54
Achnanthidium exiguum pennate diatom 0.001 0.002 1 2 2 7 N P 51.1 63 91
Taxa List Key
Column Name Description
RA Relative Abundance number of cells (density of cells per square centimeter) in a sample / total abundance of all taxa
RB Relative Biovolume Volume of a taxon’s cells in a sample / volume of all algae cells in a sample
Oxy van Dam Oxygen tolerance 1=100% DO saturation, 2=>75% DO saturation, 3=>50% DO saturation, 4=>30% DO saturation, 5=<30% DO saturation
Sap van Dam Saprobic value Saprobic values relate to the amount of organic pollution, biological oxygen demand, and DO concentrations. Values range from 1 (intolerant of organic pollution) to 5 (highly tolerant of organic pollution)
Sal van Dam Salinity value 1=freshwater (<100 mg/L chloride) , 2=fresh-brackish (<500 mg/L), 3=brackish-freshwater (500-1000 mg/L), 4=brackish (1000-5000 mg/L)
Tr van Dam Trophic value 1=oligotraphentic, 2=oligo-mesotraphentic, 3=mesotraphentic, 4=meso-eutraphentic, 5=eutraphentic, 6=hypereutraphentic, 7=indifferent to trophic state
Mot Motility of Diatoms Motility (capability of movement in water or on substrates) based on genus (Wang et al. 2005): N= not motile, M = motile , H = highly motile, V=variable within genus
GF Growth Forms E= erect, P=prostrate, S=stalked, U=unattached, V=variable (based on communication with R. Jan Stevenson)
Tol Tolerance value Tolerance to a combination of watershed disturbance, conductivity, and nutrient enrichment (based on Maine data). Value range from 1=most senstive to 100=most tolerant.
TN TN value Preference for total nitrogen (TN) based on Maine data. Values range from 1=low TN concentrations to 100=high TN concentrations.
TP TP value Preference for total phosphorus (TP) based on Maine data. Values range from 1=low TP concentrations to 100=high TP concentrations.