Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: Sheepscot River - Station 74 Sampled by: Biomonitoring Unit
Town: Whitefield Method: Rock Scrapings 1 Inch Circles
Sample Date: 2016-06-20 Sample ID: SA-74-2016R (1607)
Location: Above Rt. 126 Bridge At Usgs Gage. Park Side Of 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 = AA
Final Determination = B
Attains Class = NO
Reason = Model
Model Result = B
Prob. Class A = 0.00
Prob. Class B = 0.97
Prob. Class C = 0.03
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 = 24 m
Wetted width = 17 m
Riffle = 40 %
Run = 60 %
Canopy Cover = 25 %
Boulder = 70 %
Cobble = 15 %
Gravel = 10 %
Sand = 5 %

Viewing Bucket and Land Use
Statutory Class: AA
Nutrient Response Indicator Criterion: <19% Nuisance Algae Cover
Nuisance Algae in Survey: 2.9 % cover
Meets Nutrient Response Indicator Criterion: Yes

Site Information
Name: Sheepscot River - Station 74 Sampled by: Biomonitoring Unit
Town: Whitefield Method: Rock Scrapings 1 Inch Circles
Sample Date: 2016-06-20 Sample ID: SA-74-2016R (1607)
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 0.170 0.010 1 2 2 7 N P 41.2 NA NA
Fragilaria Pennate Diatom 0.129 0.017 N V NA NA NA
Oedogonium 5-7 µm Filamentous Green 0.076 0.251 37.6 27 47
Achnanthidium rivulare Pennate Diatom 0.049 0.005 N P 49.9 39 49
Psammothidium subatomoides Pennate Diatom 0.042 0.003 1 1 1 2 V P 42.4 20 35
Navicula cryptotenella Pennate Diatom 0.039 0.010 2 2 7 M P 44.6 61 82
Mougeotia Filamentous Green 0.037 0.250 26.9 10 12
Synedra rumpens Pennate Diatom 0.031 0.004 2 2 N E 34.3 20 32
Achnanthidium pyrenaicum Pennate Diatom 0.030 0.005 N P NA 62 80
Encyonema minutum Pennate Diatom 0.030 0.010 2 V S 50.2 21 NA
Leptolyngbya Filamentous Cyanobacteria 0.030 0.000 38.3 28 75
Planothidium lanceolatum Pennate Diatom 0.028 0.004 3 3 2 5 V P 72.5 72 91
Nitzschia acicularis Pennate Diatom 0.023 0.005 4 3 2 5 H P NA 19 85
Gomphonema exilissimum Pennate Diatom 0.022 0.006 1 1 1 1 N S NA 19 29
Mougeotia 5-7 µm Filamentous Green 0.019 0.017 26.9 10 12
Cocconeis placentula Pennate Diatom 0.018 0.015 3 2 2 5 N P NA 30 82
Cocconeis placentula var. euglypta Pennate Diatom 0.018 0.011 3 2 2 5 N P 58.2 45 81
Oedogonium 10-12 µm Filamentous Green 0.016 0.116 37.6 27 47
Cymbella tumida Pennate Diatom 0.015 0.048 1 1 2 4 V S 57.8 48 78
Gomphonema Pennate Diatom 0.015 0.004 N S 15.1 NA NA
Nitzschia palea var. debilis Pennate Diatom 0.011 0.002 1 1 1 H P 53.4 47 79
Rossithidium anastasiae Pennate Diatom 0.011 0.003 V P NA NA NA
Nitzschia recta Pennate Diatom 0.009 0.016 2 2 2 7 H P 46.6 43 73
Fragilaria crotonensis Pennate Diatom 0.009 0.004 2 2 2 3 N V NA 53 64
Ctenophora pulchella Pennate Diatom 0.008 0.017 3 5 2 3 N E 49.7 NA NA
Fragilaria mesolepta Pennate Diatom 0.008 0.003 2 N V NA NA NA
Gomphonema parvulum Pennate Diatom 0.008 0.002 4 4 2 5 N S 42.2 21 NA
Mougeotia 10-12 µm Filamentous Green 0.008 0.081 26.9 10 12
Nitzschia dissipata Pennate Diatom 0.007 0.002 2 2 2 4 H P 60.9 48 75
Ulnaria ulna Pennate Diatom 0.007 0.015 3 4 2 N E 34.2 17 21
Tabellaria flocculosa Pennate Diatom 0.005 0.002 1 2 1 3 N U 18.8 17 32
Cavinula vincentii Pennate Diatom 0.005 0.001 M P NA NA NA
Melosira varians Centric Diatom 0.005 0.031 3 3 2 5 N U 67 67 89
Achnanthidium subhudsonis var. kraeuselii Pennate Diatom 0.004 0.000 V P 57 33 89
Eolimna minima Pennate Diatom 0.004 0.000 4 4 2 5 M P 57 64 88
Asterionella formosa Pennate Diatom 0.003 0.001 2 2 2 4 N U NA 26 NA
Craticula Pennate Diatom 0.003 0.001 M P NA NA NA
Craticula halophila Pennate Diatom 0.003 0.001 2 3 4 5 M P NA NA NA
Cymbella turgidula Pennate Diatom 0.003 0.003 V S NA NA NA
Synedra famelica Pennate Diatom 0.003 0.000 1 1 2 3 N V NA NA NA
Fragilaria sepes Pennate Diatom 0.003 0.000 1 1 1 2 N V 32.1 18 39
Gomphonema lagenula Pennate Diatom 0.003 0.001 N S NA 38 78
Gomphonema minutum Pennate Diatom 0.003 0.001 2 2 5 N S 54.6 61 55
Hannaea arcus Pennate Diatom 0.003 0.002 1 2 2 2 N V NA NA NA
Navicula Pennate Diatom 0.003 0.000 M P NA NA NA
Navicula canalis Pennate Diatom 0.003 0.001 2 5 M P NA 50 89
Navicula gregaria Pennate Diatom 0.003 0.001 4 3 3 5 M P 79.6 66 89
Nitzschia lacuum Pennate Diatom 0.001 0.000 1 1 2 3 H P 64 NA NA
Nitzschia paleacea Pennate Diatom 0.001 0.000 3 3 2 5 H P 61.3 32 35
Rhoicosphenia abbreviata Pennate Diatom 0.001 0.001 2 2 2 5 V S 83.4 72 96
Staurosira construens var. venter Pennate Diatom 0.001 0.000 1 2 2 4 N V 41.3 35 67
Surirella angusta Pennate Diatom 0.001 0.002 2 2 2 5 H P 65.4 57 96
Achnanthes Pennate Diatom 0.001 0.000 V P NA NA NA
Aulacoseira ambigua Centric Diatom 0.001 0.000 3 2 2 5 N U 34.5 25 56
Cavinula pseudoscutiformis Pennate Diatom 0.001 0.000 2 2 2 4 M P NA NA NA
Diploneis pseudovalis Pennate Diatom 0.001 0.001 M P NA NA NA
Eunotia pectinalis var. undulata Pennate Diatom 0.001 0.005 1 2 1 1 V E 24.3 22 35
Frustulia amphipleuroides Pennate Diatom 0.001 0.006 1 1 1 1 M P 44.5 38 78
Gomphonema truncatum Pennate Diatom 0.001 0.000 2 2 2 4 N S 36.5 47 44
Navicula menisculus Pennate Diatom 0.001 0.001 3 3 2 5 M P 64.3 44 72
Navicula notha Pennate Diatom 0.001 0.000 M P 37.4 20 34
Nitzschia Pennate Diatom 0.001 0.000 H 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.