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: 2001-07-12 Sample ID: SA-505-2001R (73)
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 = B
Attains Class = YES
Reason = Model
Model Result = B
Prob. Class A = 0.00
Prob. Class B = 0.95
Prob. Class C = 0.04
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

Wetted width = 0 m
Depth = 60 cm
Riffle = 20 %
Run = 60 %
Pool = 20 %
Bedrock = 0 %
Boulder = 20 %
Cobble = 50 %
Gravel = 20 %
Sand = 10 %
Silt = 0 %
Clay = 0 %

Viewing Bucket and Land Use
Statutory Class: B
Nutrient Response Indicator Criterion: <24% Nuisance Algae Cover
Nuisance Algae in Survey: 27.9 % 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: 2001-07-12 Sample ID: SA-505-2001R (73)
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 0.419 0.120 1 2 2 7 N P 41.2 NA NA
Audouinella Red Algae 0.066 0.032 47.5 54 69
Staurosira construens var. venter Pennate Diatom 0.050 0.024 1 2 2 4 N V 41.3 35 67
Pediastrum duplex var. clathratum Colonial Green 0.049 0.017 NA NA NA
Scenedesmus brasilienses Colonial Green 0.049 0.003 NA NA NA
Scenedesmus acutus Colonial Green 0.049 0.005 NA NA 61
Achnanthidium deflexum Pennate Diatom 0.038 0.022 1 2 3 N P 43.5 40 52
Oedogonium Filamentous Green 0.029 0.015 37.6 27 47
Scenedesmus ecornis Colonial Green 0.027 0.006 39.9 23 69
Reimeria sinuata Pennate Diatom 0.026 0.027 1 2 2 3 M P 60.9 65 88
Fragilaria gracilis Pennate Diatom 0.018 0.013 1 1 2 2 N V 30.6 18 22
Stigonema mesenteri Filamentous Cyanobacteria 0.015 NA NA NA
Staurosira construens Pennate Diatom 0.012 0.021 1 2 2 4 N V 46.8 30 58
Synedra rumpens Pennate Diatom 0.011 0.013 2 2 N E 34.3 20 32
Encyonema minutum Pennate Diatom 0.011 0.019 2 V S 50.2 21 NA
Mougeotia 5-7 µm Filamentous Green 0.010 0.129 26.9 10 12
Staurosirella pinnata Pennate Diatom 0.009 0.017 1 2 2 7 N V 44.2 38 56
Nitzschia palea Pennate Diatom 0.008 0.006 4 5 2 6 H P 60.3 67 89
Navicula cryptocephala Pennate Diatom 0.007 0.013 3 3 2 7 M P 56.3 55 80
Navicula reichardtiana Pennate Diatom 0.006 0.009 3 2 M P 55.7 51 71
Hippodonta capitata Pennate Diatom 0.006 0.011 3 3 2 4 M P 66.8 61 89
Navicula capitatoradiata Pennate Diatom 0.006 0.024 3 3 2 5 M P 68.5 62 78
Gomphonema micropus Pennate Diatom 0.006 0.020 2 2 2 5 N S 39 72 89
Nitzschia frustulum Pennate Diatom 0.005 0.001 3 2 3 5 H P 50.4 53 88
Planothidium frequentissimum Pennate Diatom 0.005 0.004 3 4 2 V P 65.1 69 92
Gomphonema parvulum Pennate Diatom 0.004 0.005 4 4 2 5 N S 42.2 21 NA
Delicata delicatula Pennate Diatom 0.004 0.009 1 1 1 1 V S 31.3 21 22
Achnanthidium affine Pennate Diatom 0.004 0.004 1 2 N P 64.7 NA 67
Nitzschia dissipata Pennate Diatom 0.003 0.009 2 2 2 4 H P 60.9 48 75
Eolimna minima Pennate Diatom 0.003 0.001 4 4 2 5 M P 57 64 88
Encyonema reichardtii Pennate Diatom 0.003 0.032 1 1 2 3 V S 76.1 66 71
Sellaphora seminulum Pennate Diatom 0.002 0.001 4 4 2 5 M P 51.5 67 73
Tetraedron trigonum Unicellular Green 0.002 0.008 NA NA NA
Nitzschia supralitorea Pennate Diatom 0.002 0.001 2 3 2 5 H P 65.4 62 89
Cosmarium biretum var. minus Desmid 0.002 0.252 NA 18 15
Gomphonema truncatum Pennate Diatom 0.002 0.030 2 2 2 4 N S 36.5 47 44
Nitzschia palea var. debilis Pennate Diatom 0.002 0.001 1 1 1 H P 53.4 47 79
Nitzschia acicularis Pennate Diatom 0.002 0.001 4 3 2 5 H P NA 19 85
Encyonema auerswaldii Pennate Diatom 0.002 0.011 V S NA NA NA
Navicula gregaria Pennate Diatom 0.002 0.003 4 3 3 5 M P 79.6 66 89
Frustulia krammeri Pennate Diatom 0.002 0.005 1 1 1 1 M P 20.3 38 54
Amphora copulata Pennate Diatom 0.002 0.025 2 2 2 5 M P 53.5 48 73
Cocconeis placentula var. euglypta Pennate Diatom 0.002 0.003 3 2 2 5 N P 58.2 45 81
Karayevia laterostrata Pennate Diatom 0.002 0.003 1 1 1 1 V P 59 58 84
Caloneis bacillum Pennate Diatom 0.002 0.003 2 2 2 4 M P 64.9 72 96
Eunotia bilunaris Pennate Diatom 0.001 0.004 2 2 2 7 V E 37.6 17 28
Eucocconeis laevis Pennate Diatom 0.001 0.001 1 1 1 1 V P 29.5 17 18
Geissleria decussis Pennate Diatom 0.001 0.002 1 2 4 M P 44.5 40 80
Karayevia clevei Pennate Diatom 0.001 0.001 2 2 2 4 V P 54.3 NA 72
Navicula tripunctata Pennate Diatom 0.001 0.008 2 2 2 5 M P 69.4 76 88
Surirella minuta Pennate Diatom 0.001 0.004 3 3 2 5 H P 79.7 69 95
Nitzschia perminuta Pennate Diatom 0.001 0.001 1 1 2 2 H P 56.7 53 76
Navicula notha Pennate Diatom 0.001 0.001 M P 37.4 20 34
Psammothidium chlidanos Pennate Diatom 0.001 0.001 V P 32.5 16 14
Geissleria paludosa Pennate Diatom 0.001 0.001 1 1 1 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.