Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: French Stream - Station 505 Sampled by: Biomonitoring Unit
Town: Exeter Method: Rock Scrapings 1 Inch Circles
Sample Date: 2016-07-20 Sample ID: SA-505-2016R (1647)
Location: Downstream Site - Crane Road

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 = B
Final Determination =
Attains Class = —
Reason =
Model Result = C
Prob. Class A = 0.00
Prob. Class B = 0.00
Prob. Class C = 0.89
Prob. NA = 0.11
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 = 12 m
Wetted width = 11 m
Depth = 35 cm
Water velocity = 45 cm/s
Riffle = 50 %
Run = 50 %
Canopy Cover = 22 %
Boulder = 40 %
Cobble = 30 %
Gravel = 15 %
Sand = 15 %

Viewing Bucket and Land Use
Statutory Class: B
Nutrient Response Indicator Criterion: <24% Nuisance Algae Cover
Nuisance Algae in Survey: 47.3 % cover
Meets Nutrient Response Indicator Criterion: No

Site Information
Name: French Stream - Station 505 Sampled by: Biomonitoring Unit
Town: Exeter Method: Rock Scrapings 1 Inch Circles
Sample Date: 2016-07-20 Sample ID: SA-505-2016R (1647)
Taxa List (See key at end of report)
Name Group RA RB Oxy Sap Sal Tr Mot GF Tol TN TP
Achnanthidium minutissimum Pennate Diatom 0.172 0.005 1 2 2 7 N P 41.2 NA NA
Melosira varians Centric Diatom 0.160 0.482 3 3 2 5 N U 67 67 89
Unknown Rhodophyte Florideophycidae (Chantransia) Red Algae 0.103 0.015 47.5 48 68
Achnanthidium pyrenaicum Pennate Diatom 0.077 0.006 N P NA 62 80
Oedogonium 15-20  µm Filamentous Green 0.066 0.382 37.6 27 47
Pseudanabaena Filamentous Cyanobacteria 0.057 0.000 NA 71 84
Gomphonema minutum Pennate Diatom 0.056 0.010 2 2 5 N S 54.6 61 55
Fragilaria mesolepta Pennate Diatom 0.043 0.008 2 N V NA NA NA
Gongrosira Filamentous Green 0.033 0.029 37.3 37 NA
Nitzschia palea var. debilis Pennate Diatom 0.031 0.003 1 1 1 H P 53.4 47 79
Gomphonema parvulum Pennate Diatom 0.023 0.003 4 4 2 5 N S 42.2 21 NA
Nitzschia innominata Pennate Diatom 0.018 0.001 H P NA NA NA
Nitzschia dissipata Pennate Diatom 0.016 0.002 2 2 2 4 H P 60.9 48 75
Achnanthidium rivulare Pennate Diatom 0.013 0.001 N P 49.9 39 49
Navicula cryptocephala Pennate Diatom 0.010 0.002 3 3 2 7 M P 56.3 55 80
Achnanthidium eutrophilum Pennate Diatom 0.009 0.000 N P NA 33 52
Nitzschia recta Pennate Diatom 0.009 0.008 2 2 2 7 H P 46.6 43 73
Amphora pediculus Pennate Diatom 0.007 0.000 2 2 2 5 M P 76.2 71 93
Nitzschia linearis Pennate Diatom 0.007 0.012 2 2 2 4 H P 54.2 68 87
Nitzschia palea Pennate Diatom 0.007 0.001 4 5 2 6 H P 60.3 67 89
Phormidium Filamentous Cyanobacteria 0.007 0.000 42.6 60 NA
Cocconeis placentula Pennate Diatom 0.006 0.003 3 2 2 5 N P NA 30 82
Staurosira construens var. venter Pennate Diatom 0.006 0.000 1 2 2 4 N V 41.3 35 67
Encyonema auerswaldii Pennate Diatom 0.005 0.006 V S NA NA NA
Meridion circulare Pennate Diatom 0.005 0.002 2 2 2 7 N E 46.5 64 87
Navicula lanceolata Pennate Diatom 0.005 0.004 3 3 3 5 M P 77.5 75 98
Navicula reichardtiana Pennate Diatom 0.005 0.000 3 2 M P 55.7 51 71
Nitzschia dissipata var. media Pennate Diatom 0.005 0.001 2 H P 64.7 NA NA
Nitzschia frustulum Pennate Diatom 0.005 0.000 3 2 3 5 H P 50.4 53 88
Cocconeis placentula var. euglypta Pennate Diatom 0.004 0.001 3 2 2 5 N P 58.2 45 81
Navicula radiosa Pennate Diatom 0.004 0.002 2 2 2 4 M P 41.8 34 73
Cocconeis placentula var. lineata Pennate Diatom 0.002 0.001 3 2 2 5 N P 51.5 62 82
Encyonema minutum Pennate Diatom 0.002 0.000 2 V S 50.2 21 NA
Gomphonema Pennate Diatom 0.002 0.000 N S 15.1 NA NA
Nitzschia fonticola Pennate Diatom 0.002 0.000 2 2 2 4 H P 82.2 49 80
Nitzschia paleacea Pennate Diatom 0.002 0.000 3 3 2 5 H P 61.3 32 35
Ulnaria acus Pennate Diatom 0.002 0.002 2 3 2 5 N E 31.7 29 48
Diatoma vulgaris Pennate Diatom 0.001 0.003 2 2 2 4 N U 88.7 60 89
Gomphonema kobayasii Pennate Diatom 0.001 0.000 N S 71.2 50 79
Navicula Pennate Diatom 0.001 0.000 M P NA NA NA
Navicula capitatoradiata Pennate Diatom 0.001 0.000 3 3 2 5 M P 68.5 62 78
Navicula cryptotenella Pennate Diatom 0.001 0.000 2 2 7 M P 44.6 61 82
Navicula tripunctata Pennate Diatom 0.001 0.001 2 2 2 5 M P 69.4 76 88
Nitzschia inconspicua Pennate Diatom 0.001 0.000 3 3 3 5 H P 83.7 69 98
Nitzschia oligotraphenta Pennate Diatom 0.001 0.001 H P NA NA NA
Sellaphora pupula Pennate Diatom 0.001 0.000 3 3 2 4 M P 46.8 38 75
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.