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
Phormidium filamentous cyanobacteria 0.330 0.050 42.6 60 NA
Homoeothrix janthina filamentous cyanobacteria 0.185 0.002 43 19 21
Unknown Rhodophyte Florideophycidae (Chantransia) red algae 0.137 0.120 47.5 48 68
Leptolyngbya filamentous cyanobacteria 0.099 0.001 38.3 28 75
Achnanthidium minutissimum pennate diatom 0.071 0.004 1 2 2 7 N P 41.2 NA NA
Achnanthidium rivulare pennate diatom 0.045 0.004 N P 49.9 39 49
Gongrosira filamentous green 0.018 0.041 37.3 37 NA
Oedogonium filamentous green 0.014 0.682 37.6 27 47
Fragilaria vaucheriae pennate diatom 0.011 0.004 3 3 2 5 N V 44.2 36 NA
Gomphonema parvulum pennate diatom 0.010 0.004 4 4 2 5 N S 42.2 21 NA
Ankistrodesmus falcatus colonial green 0.010 0.001 45.7 58 75
Microspora tumidula filamentous green 0.006 0.001 NA NA NA
Fallacia tenera pennate diatom 0.003 0.000 M P NA NA NA
Aulacoseira ambigua centric diatom 0.003 0.002 3 2 2 5 N U 34.5 25 56
Planothidium frequentissimum pennate diatom 0.003 0.001 3 4 2 V P 65.1 69 92
Eolimna minima pennate diatom 0.003 0.000 4 4 2 5 M P 57 64 88
Cymbella tumida pennate diatom 0.003 0.014 1 1 2 4 V S 57.8 48 78
Encyonema minutum pennate diatom 0.003 0.001 2 V S 50.2 21 NA
Caloneis bacillum pennate diatom 0.003 0.002 2 2 2 4 M P 64.9 72 96
Navicula gregaria pennate diatom 0.002 0.001 4 3 3 5 M P 79.6 66 89
Navicula recens pennate diatom 0.002 0.002 3 3 5 M P NA NA NA
Trachelomonas volvocina euglenoid 0.002 0.005 NA NA NA
Nitzschia frustulum pennate diatom 0.002 0.000 3 2 3 5 H P 50.4 53 88
Nitzschia palea pennate diatom 0.002 0.001 4 5 2 6 H P 60.3 67 89
Nitzschia palea var. debilis pennate diatom 0.002 0.000 1 1 1 H P 53.4 47 79
Encyonema silesiacum pennate diatom 0.002 0.003 3 3 2 7 V S 46.9 43 69
Staurosira construens pennate diatom 0.001 0.000 1 2 2 4 N V 46.8 30 58
Eucocconeis laevis pennate diatom 0.001 0.000 1 1 1 1 V P 29.5 17 18
Bacillaria paradoxa pennate diatom 0.001 0.003 N P NA NA NA
Pennales pennate diatom 0.001 0.002 NA NA NA
Planothidium rostratum pennate diatom 0.001 0.000 3 3 2 5 V P 56.6 48 96
Placoneis elginensis pennate diatom 0.001 0.002 2 2 2 5 M P NA NA NA
Nitzschia amphibia pennate diatom 0.001 0.000 3 3 2 5 H P 79.8 53 93
Nitzschia dissipata pennate diatom 0.001 0.001 2 2 2 4 H P 60.9 48 75
Nitzschia acidoclinata pennate diatom 0.001 0.000 1 2 1 3 H P 51.6 40 56
Discostella stelligera centric diatom 0.001 0.000 2 N U NA 51 NA
Hippodonta capitata pennate diatom 0.001 0.001 3 3 2 4 M P 66.8 61 89
Navicula rhynchocephala pennate diatom 0.001 0.001 4 2 2 7 M P 62.1 44 78
Navicula antonii pennate diatom 0.001 0.000 M P 65.4 54 89
Cymbopleura naviculiformis pennate diatom 0.001 0.003 2 2 2 5 V S 51.6 35 53
Rossithidium linearis pennate diatom 0.001 0.000 V P 32 24 56
Staurosira construens var. venter pennate diatom 0.001 0.000 1 2 2 4 N V 41.3 35 67
Adlafia bryophila pennate diatom 0.001 0.000 1 1 1 3 M P 38.2 20 59
Tabellaria flocculosa pennate diatom 0.001 0.002 1 2 1 3 N U 18.8 17 32
Surirella minuta pennate diatom 0.001 0.001 3 3 2 5 H P 79.7 69 95
Achnanthes subhudsonis var. kraeuselii pennate diatom 0.001 0.000 V P 57 33 89
Navicula symmetrica pennate diatom 0.001 0.001 M P NA NA NA
Nupela frezelii pennate diatom 0.001 0.000 M P NA NA NA
Fragilaria capucina var. gracilis pennate diatom 0.001 0.000 1 1 2 2 N V 30.6 18 22
Navicula cryptocephala pennate diatom 0.001 0.001 3 3 2 7 M P 56.3 55 80
Craticula subminuscula pennate diatom 0.001 0.000 4 4 2 5 M P NA NA NA
Stephanodiscus niagarae centric diatom 0.000 0.020 N U NA NA NA
Gomphonema kobayasii pennate diatom 0.000 0.000 N S 71.2 50 79
Fallacia pygmaea pennate diatom 0.000 0.000 3 3 3 5 M P NA NA NA
Staurosirella pinnata pennate diatom 0.000 0.000 1 2 2 7 N V 44.2 38 56
Staurosira construens var. binodis pennate diatom 0.000 0.000 1 1 2 4 N V NA NA NA
Ulnaria ulna pennate diatom 0.000 0.001 3 4 2 N E 34.2 17 21
Aulacoseira granulata centric diatom 0.000 0.000 3 2 2 5 N U NA NA NA
Cyclotella bodanica var. lemanica centric diatom 0.000 0.000 1 1 1 1 N U 14.3 21 20
Cyclotella meneghiniana centric diatom 0.000 0.000 5 4 3 5 N U 72.6 55 73
Discostella pseudostelligera centric diatom 0.000 0.000 3 3 2 5 N U 28.6 38 86
Nitzschia acicularioides pennate diatom 0.000 0.000 H P NA NA NA
Gomphonema gracile pennate diatom 0.000 0.000 1 1 2 3 N S 21.9 13 20
Navicula erifuga pennate diatom 0.000 0.000 3 5 M P 66.5 NA NA
Stauroneis kriegeri pennate diatom 0.000 0.000 2 2 2 4 M P 48.4 59 96
Mayamaea agrestis pennate diatom 0.000 0.000 2 M P 67.8 NA NA
Mayamaea atomus pennate diatom 0.000 0.000 2 4 2 6 M P NA NA NA
Navicula pennate diatom 0.000 0.000 M P NA NA NA
Navicula trivialis pennate diatom 0.000 0.001 3 3 3 5 M P 78.6 68 98
Surirella linearis pennate diatom 0.000 0.007 2 2 2 H P NA NA NA
Cocconeis placentula pennate diatom 0.000 0.000 3 2 2 5 N P NA 30 82
Nitzschia recta pennate diatom 0.000 0.001 2 2 2 7 H P 46.6 43 73
Achnanthidium altergracillima pennate diatom 0.000 0.000 2 1 N P NA 26 31
Achnanthidium exiguum pennate diatom 0.000 0.000 1 2 2 7 N P 51.1 63 91
Eunotia implicata pennate diatom 0.000 0.002 1 V E 28.3 16 15
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.