Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information

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
Lyngbya filamentous cyanobacteria 0.256 0.015 48.5 NA NA
Cocconeis placentula var. euglypta pennate diatom 0.243 0.162 3 2 2 5 N P 58.2 45 81
Oscillatoria filamentous cyanobacteria 0.150 0.014 NA NA NA
Navicula tripunctata pennate diatom 0.059 0.192 2 2 2 5 M P 69.4 76 88
Planothidium frequentissimum pennate diatom 0.051 0.016 3 4 2 V P 65.1 69 92
Meridion circulare pennate diatom 0.043 0.070 2 2 2 7 N E 46.5 64 87
Achnanthidium minutissimum pennate diatom 0.034 0.004 1 2 2 7 N P 41.2 NA NA
Navicula viridula pennate diatom 0.034 0.286 2 3 2 5 M P 70.7 74 NA
Navicula trivialis pennate diatom 0.015 0.031 3 3 3 5 M P 78.6 68 98
Melosira varians centric diatom 0.013 0.034 3 3 2 5 N U 67 67 89
Navicula notha pennate diatom 0.013 0.007 M P 37.4 20 34
Amphora pediculus pennate diatom 0.011 0.003 2 2 2 5 M P 76.2 71 93
Navicula lanceolata pennate diatom 0.009 0.047 3 3 3 5 M P 77.5 75 98
Reimeria sinuata pennate diatom 0.009 0.004 1 2 2 3 M P 60.9 65 88
Gomphonema angustatum pennate diatom 0.008 0.006 1 1 2 1 N S 58 50 84
Planothidium lanceolatum pennate diatom 0.007 0.004 3 3 2 5 V P 72.5 72 91
Planothidium rostratum pennate diatom 0.005 0.002 3 3 2 5 V P 56.6 48 96
Nitzschia linearis pennate diatom 0.005 0.021 2 2 2 4 H P 54.2 68 87
Nitzschia palea pennate diatom 0.004 0.001 4 5 2 6 H P 60.3 67 89
Navicula radiosa pennate diatom 0.003 0.011 2 2 2 4 M P 41.8 34 73
Fragilaria vaucheriae pennate diatom 0.003 0.001 3 3 2 5 N V 44.2 36 NA
Gomphonema gracile pennate diatom 0.002 0.002 1 1 2 3 N S 21.9 13 20
Cymbella pennate diatom 0.002 0.003 V S NA NA NA
Navicula menisculus pennate diatom 0.002 0.001 3 3 2 5 M P 64.3 44 72
Nitzschia heufleriana pennate diatom 0.002 0.012 2 2 H P NA NA NA
Nitzschia vermicularis pennate diatom 0.002 0.016 1 2 2 7 H P NA NA NA
Gomphonema parvulum pennate diatom 0.002 0.001 4 4 2 5 N S 42.2 21 NA
Nitzschia palea var. debilis pennate diatom 0.002 0.000 1 1 1 H P 53.4 47 79
Cocconeis pediculus pennate diatom 0.002 0.010 2 2 3 5 N P 72.3 68 88
Neidium hercynicum pennate diatom 0.002 0.004 2 M P NA NA NA
Navicula cryptocephala pennate diatom 0.002 0.001 3 3 2 7 M P 56.3 55 80
Gomphonema affine pennate diatom 0.002 0.009 1 2 2 3 N S 34.3 NA NA
Cocconeis placentula var. lineata pennate diatom 0.001 0.001 3 2 2 5 N P 51.5 62 82
Stauroneis kriegeri pennate diatom 0.001 0.000 2 2 2 4 M P 48.4 59 96
Caloneis bacillum pennate diatom 0.001 0.001 2 2 2 4 M P 64.9 72 96
Neidium ampliatum pennate diatom 0.001 0.006 2 2 M P NA NA NA
Pinnularia lundii pennate diatom 0.001 0.002 2 3 M P NA NA NA
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.