Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: French Stream - Station 310 Sampled by: Biomonitoring Unit
Town: Exeter Method: Rock Scrapings 1 Inch Circles
Sample Date: 2001-07-12 Sample ID: SA-310-2001R (71)
Location: Tibbetts Rd. Crossing; 8 Km South Of Stubbs Corner

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 = 0.71
Prob. Class C = 0.29
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 = 2 m
Depth = 30 cm
Bedrock = 0 %
Boulder = 0 %
Cobble = 15 %
Gravel = 35 %
Sand = 30 %
Silt = 10 %
Clay = 10 %

Viewing Bucket and Land Use

Site Information
Name: French Stream - Station 310 Sampled by: Biomonitoring Unit
Town: Exeter Method: Rock Scrapings 1 Inch Circles
Sample Date: 2001-07-12 Sample ID: SA-310-2001R (71)
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 0.208 0.016 1 2 2 7 N P 41.2 NA NA
Staurosira construens Pennate Diatom 0.159 0.076 1 2 2 4 N V 46.8 30 58
Navicula cryptocephala Pennate Diatom 0.078 0.039 3 3 2 7 M P 56.3 55 80
Navicula viridulacalcis Pennate Diatom 0.073 0.273 M P 58.9 NA NA
Navicula trivialis Pennate Diatom 0.055 0.075 3 3 3 5 M P 78.6 68 98
Gomphonema parvulum Pennate Diatom 0.044 0.014 4 4 2 5 N S 42.2 21 NA
Staurosira construens var. venter Pennate Diatom 0.044 0.006 1 2 2 4 N V 41.3 35 67
Fragilaria gracilis Pennate Diatom 0.041 0.010 1 1 2 2 N V 30.6 18 22
Scenedesmus ecornis Colonial Green 0.026 0.002 39.9 23 69
Nitzschia palea var. debilis Pennate Diatom 0.024 0.003 1 1 1 H P 53.4 47 79
Cymbella tumida Pennate Diatom 0.018 0.120 1 1 2 4 V S 57.8 48 78
Staurosirella pinnata Pennate Diatom 0.018 0.010 1 2 2 7 N V 44.2 38 56
Gomphonema truncatum Pennate Diatom 0.016 0.063 2 2 2 4 N S 36.5 47 44
Ulnaria ulna Pennate Diatom 0.013 0.095 3 4 2 N E 34.2 17 21
Scenedesmus brasilienses Colonial Green 0.013 0.000 NA NA NA
Encyonema minutum Pennate Diatom 0.012 0.006 2 V S 50.2 21 NA
Navicula hintzii Pennate Diatom 0.010 0.005 2 2 7 M P 42.1 NA NA
Planothidium frequentissimum Pennate Diatom 0.010 0.002 3 4 2 V P 65.1 69 92
Meridion circulare Pennate Diatom 0.008 0.009 2 2 2 7 N E 46.5 64 87
Nitzschia recta Pennate Diatom 0.008 0.005 2 2 2 7 H P 46.6 43 73
Nitzschia supralitorea Pennate Diatom 0.008 0.001 2 3 2 5 H P 65.4 62 89
Sellaphora pupula var. capitata Pennate Diatom 0.008 0.004 M P NA NA NA
Navicula radiosa Pennate Diatom 0.008 0.021 2 2 2 4 M P 41.8 34 73
Amphipleura pellucida Pennate Diatom 0.005 0.007 2 4 2 2 M P 43.8 20 59
Encyonopsis microcephala Pennate Diatom 0.005 0.001 1 1 2 4 V S 34.8 17 24
Nitzschia frustulum Pennate Diatom 0.005 0.000 3 2 3 5 H P 50.4 53 88
Reimeria sinuata Pennate Diatom 0.005 0.001 1 2 2 3 M P 60.9 65 88
Ulnaria acus Pennate Diatom 0.005 0.009 2 3 2 5 N E 31.7 29 48
Tabellaria flocculosa Pennate Diatom 0.005 0.014 1 2 1 3 N U 18.8 17 32
Eunotia minor Pennate Diatom 0.005 0.009 1 1 V E 42.4 19 34
Navicula capitatoradiata Pennate Diatom 0.005 0.005 3 3 2 5 M P 68.5 62 78
Nitzschia dissipata Pennate Diatom 0.005 0.004 2 2 2 4 H P 60.9 48 75
Cocconeis placentula var. lineata Pennate Diatom 0.004 0.002 3 2 2 5 N P 51.5 62 82
Cyclotella meneghiniana Centric Diatom 0.004 0.001 5 4 3 5 N U 72.6 55 73
Nitzschia palea Pennate Diatom 0.004 0.001 4 5 2 6 H P 60.3 67 89
Achnanthidium deflexum Pennate Diatom 0.004 0.001 1 2 3 N P 43.5 40 52
Gomphonema gracile Pennate Diatom 0.003 0.002 1 1 2 3 N S 21.9 13 20
Caloneis bacillum Pennate Diatom 0.003 0.001 2 2 2 4 M P 64.9 72 96
Caloneis silicula Pennate Diatom 0.003 0.002 2 1 2 4 M P NA NA NA
Cosmarium portianum Desmid 0.003 0.050 NA 18 15
Encyonema auerswaldii Pennate Diatom 0.003 0.004 V S NA NA NA
Delicata delicatula Pennate Diatom 0.003 0.002 1 1 1 1 V S 31.3 21 22
Encyonema elginense Pennate Diatom 0.003 0.008 V S NA NA NA
Encyonema brehmii Pennate Diatom 0.003 0.001 1 1 1 V S NA NA NA
Cymbella affinis Pennate Diatom 0.003 0.005 1 2 2 5 V S 36.4 36 39
Nitzschia linearis Pennate Diatom 0.003 0.008 2 2 2 4 H P 54.2 68 87
Hippodonta capitata Pennate Diatom 0.003 0.001 3 3 2 4 M P 66.8 61 89
Stauroneis anceps Pennate Diatom 0.003 0.008 2 2 2 4 M P 40.1 NA NA
Gomphonema hebridense Pennate Diatom 0.001 0.002 N S NA NA NA
Rossithidium linearis Pennate Diatom 0.001 0.000 V P 32 24 56
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.