Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: West Branch Ellis River - Station 872 Sampled by: Biomonitoring Unit
Town: Andover Method: Rock Scrapings 1 Inch Circles
Sample Date: 2018-07-25 Sample ID: SA-872-2018R (1775)
Location: 215 M Downstream Of Route 120 Bridge

Model Results and Variables

 Blue = this sample. Boxplots = range of all samples. Grey shaded areas = 90th and/or 10th percentile of reference site values.

Statutory Class = A
Final Determination = A
Attains Class = YES
Reason = Model
Model Result = A
Prob. Class A = 1.00
Prob. Class B = 0.00
Prob. Class C = 0.00
Prob. NA = 0.00
Additional Metrics

Stream Characteristics and Water Chemistry

 Blue = this sample. Boxplots = range of all samples. Grey shaded areas = 10th to 90th percentile of reference site values

Bankfull width = 21 m
Wetted width = 11 m
Depth = 20 cm
Water velocity = 53 cm/s
Riffle = 40 %
Run = 60 %
Canopy Cover = 28 %
Cobble = 40 %
Gravel = 50 %
Sand = 10 %

Viewing Bucket and Land Use
Statutory Class: A
Nutrient Response Indicator Criterion: <19% Nuisance Algae Cover
Nuisance Algae in Survey: 12.7 % cover
Meets Nutrient Response Indicator Criterion: Yes

Site Information
Name: West Branch Ellis River - Station 872 Sampled by: Biomonitoring Unit
Town: Andover Method: Rock Scrapings 1 Inch Circles
Sample Date: 2018-07-25 Sample ID: SA-872-2018R (1775)
Taxa List (See key at end of report)
Name Group RA RB Oxy Sap Sal Tr Mot GF Tol TN TP
Scenedesmus Colonial Green 0.001 NA NA NA
Surirella tenera Pennate Diatom 0.032 2 2 2 5 H P NA NA NA
Synedra rumpens Pennate Diatom 0.002 2 2 N E 34.3 20 32
Tabellaria flocculosa Pennate Diatom 0.097 1 2 1 3 N U 18.8 17 32
Tabellaria flocculosa var. linearis Pennate Diatom 0.005 N U 18.8 25 33
Ulnaria ulna Pennate Diatom 0.063 3 4 2 N E 34.2 17 21
Undetermined coccoid green Colonial Green 0.008 NA NA NA
Achnanthidium minutissimum Pennate Diatom 0.011 1 2 2 7 N P 41.2 NA NA
Achnanthidium rivulare Pennate Diatom 0.000 N P 49.9 39 49
Ankistrodesmus falcatus Colonial Green 0.001 45.7 58 75
Batrachospermum Red Algae 0.005 27.6 27 32
Brachysira microcephala Pennate Diatom 0.001 2 1 2 2 M P 18 12 18
Closterium Desmid 0.020 NA NA NA
Cocconeis placentula var. lineata Pennate Diatom 0.003 3 2 2 5 N P 51.5 62 82
Encyonema minutum Pennate Diatom 0.000 2 V S 50.2 21 NA
Encyonema neogracile Pennate Diatom 0.001 1 1 1 2 V S 24 7 NA
Encyonema silesiacum Pennate Diatom 0.001 3 3 2 7 V S 46.9 43 69
Encyonopsis cesatiformis Pennate Diatom 0.001 V S NA NA NA
Encyonopsis subminuta Pennate Diatom 0.000 V S NA 30 36
Eucocconeis laevis Pennate Diatom 0.002 1 1 1 1 V P 29.5 17 18
Eunotia Pennate Diatom 0.006 V E NA NA NA
Eunotia exigua Pennate Diatom 0.000 2 3 2 7 V E 21.7 13 13
Eunotia exigua var. tridentula Pennate Diatom 0.000 1 1 V E NA NA NA
Eunotia implicata Pennate Diatom 0.004 1 V E 28.3 16 15
Eunotia muscicola var. tridentula Pennate Diatom 0.000 V E 1 2 NA
Fragilaria capucina Pennate Diatom 0.001 2 2 3 N V 32.9 59 51
Fragilaria gracilis Pennate Diatom 0.006 1 1 2 2 N V 30.6 18 22
Fragilaria distans Pennate Diatom 0.001 N V NA NA NA
Fragilaria perminuta Pennate Diatom 0.014 N V NA NA NA
Fragilaria vaucheriae Pennate Diatom 0.006 3 3 2 5 N V 44.2 36 NA
Gomphonema Pennate Diatom 0.003 N S 15.1 NA NA
Gomphonema parvulum Pennate Diatom 0.003 4 4 2 5 N S 42.2 21 NA
Heteroleibleinia Filamentous Cyanobacteria 0.000 NA 22 22
Monoraphidium contortum Colonial Green 0.000 NA NA NA
Mougeotia Filamentous Green 0.697 26.9 10 12
Navicula notha Pennate Diatom 0.001 M P 37.4 20 34
Stauridium tetras Colonial Green 0.000 35.2 NA NA
Peronia fibula Pennate Diatom 0.002 1 1 1 2 M S NA NA NA
Psammothidium acidoclinatum Pennate Diatom 0.000 V P NA NA NA
Pseudostaurosira brevistriata Pennate Diatom 0.002 1 1 2 7 N E 32.2 46 45
Rossithidium pusillum Pennate Diatom 0.000 1 1 2 1 V P NA 21 52
Staurosira construens var. venter Pennate Diatom 0.001 1 2 2 4 N V 41.3 35 67
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.