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 Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: Stone Brook - Station 944 Sampled by: Biomonitoring Unit
Town: Augusta Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Kennebec Sample ID: SA-944-2017R (1677)
Sample Date: 2017-07-10 Taxonomist: Ecoanalysts Idaho
Location: ~0.2 Miles Down Stony Brook Road. New Location - 41 Anthony Drive Park At Very Back Left End Of Health And Human Services. Hop Off End And Walk Down To Stream. Or Dhhs Parking Lot
Sample comments:
Latitude: 44.34513057
Longitude: -69.80070179

Three figures from left to right: On the far left, an outline of the state of Maine with the site location marked in blue. In the middle, a satellite image view of the area of the site, with waterbodies marked in blue, and the site marked in red, with a scale bar and north arrow. On the right, a downstream image of the sample site.

Model Results and Variable Plots

 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 = C
Attains Class = NO
Reason = Model
Model Result = C
Prob. Class A = 0.00
Prob. Class B = 0.00
Prob. Class C = 0.96
Prob. NA = 0.04

Boxplots of stream algae model metrics, including range of values from all samples, from reference sites, and this specific sample. Stream algae model metrics are in a table below.

Additional Variable Plots

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

Boxplots of additional stream algae metrics, including range of values from all samples, from reference sites, and this specific sample. Additional stream algae metrics are in a table below.

Model Variables Table
Variable Sample value All data median All data 10th percentile All data 90th percentile Reference range lower limit Reference range upper limit Reference range description
Salt-tolerant diatom percent abundance 6.73 0.90 0.00 9.15 0.00 1.08 <90th percentile
Nutrient-tolerant diatom richness 18.00 8.00 3.00 17.00 0.00 8.00 <90th percentile
Intermediate diatom richness 24.00 19.00 11.00 28.80 9.00 25.30 10th to 90th percentile
Intolerant algae percent species 2.63 18.75 3.70 42.27 22.12 72.41 >10th percentile
Motile diatom percent abundance 16.32 8.49 1.55 31.56 0.00 11.59 <90th percentile
Tolerant algae percent abundance 14.90 1.19 0.00 17.43 0.00 1.05 <90th percentile
Additional Variables Table
Variable Sample value All data median All data 10th percentile All data 90th percentile Reference range lower limit Reference range upper limit Reference range description
Tolerance Index (all algae) 46.77 42.67 37.09 49.07 0.00 42.34 <90th percentile
Nitrogen Index (all algae) 50.93 38.64 26.81 51.56 0.00 35.58 <90th percentile
Phosphorus Index (all algae) 72.36 58.62 38.59 76.56 0.00 53.06 <90th percentile
Intolerant algae percent species 1.00 6.00 1.00 14.00 5.00 23.00 >10th percentile
Intolerant algae richness 9.09 6.25 0.00 16.00 0.00 7.14 <90th percentile
Salt-tolerant diatom percent richness 83.12 89.95 61.14 98.30 45.42 97.96 10th to 90th percentile
Tolerant algae percent richness 34.21 16.67 0.00 41.38 0.00 14.29 <90th percentile
Nutrient- tolerant diatom percent abundance 37.16 42.06 7.59 84.31 0.00 48.33 <90th percentile
Stream Characteristics and Water Chemistry Plots

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

Bankfull width = 10 m
Wetted width = 6 m
Depth = 12 cm
Water velocity = 30 cm/s
Riffle = 40 %
Run = 40 %
Pool = 20 %
Canopy Cover = 78 %
Boulder = 45 %
Cobble = 40 %
Gravel = 10 %
Sand = 5 %
Boxplots of stream water chemistry. Values are in a table below.
Water Chemistry Table
Parameter Sample Date Sample value All data median All data 10th percentile All data 90th percentile Reference 10th percentile Reference 90th percentile Units
Dissolved Oxygen 2017-07-10 9.51 8.60 7.00 10.23 7.80 10.62 Milligrams Per Liter
pH 2017-07-10 7.74 7.12 6.21 7.97 6.00 7.55 Standard Ph Unit
Specific Conductance 2017-07-10 589 88.55 25.00 492.00 15.41 67.31 Microsiemens Per Centimeter
Temperature 2017-07-10 23 20.00 14.70 24.70 12.80 23.60 Degrees Celcius (Temperature)
Nitrate + Nitrite As Nitrogen 2017-07-10 0.03 0.08 0.02 0.61 0.01 0.09 Milligrams Per Liter
Orthophosphate As Phosphorus 2017-07-10 2 2.00 1.00 11.00 1.00 3.00 Micrograms Per Liter
Total Alkalinity 2017-07-10 5.8 19.50 4.44 113.20 2.00 21.00 Milligrams Per Liter
Total Kjeldahl Nitrogen 2017-07-10 0.4 0.40 0.20 0.60 0.10 0.50 Milligrams Per Liter
Total Phosphorus 2017-07-10 22 18.00 7.00 48.00 4.00 18.00 Micrograms Per Liter
Viewing Bucket
Viewing Bucket Table
Cover type Percent cover Cover group
Sand / Mud 2.86 Not algae
Mat Incomplete 53.33 Thin algal layer
Mat <1mm Thick 43.81 Thin algal layer

Barplot of viewing bucket substrate cover types, available in table on the right.

Land Use
Land Cover Data Source: MELCD 2004
Watershed Area (sq km):
Impervious Cover %:
Land Use Table
Cover Type Percent Category
No data No Data No data

Barplots of landcover data from watershed upstream of sample location. Percentages are available in a table on the right

Site Information
Name: Stone Brook - Station 944 Sampled by: Biomonitoring Unit
Town: Augusta Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Kennebec Sample ID: SA-944-2017R (1677)
Sample Date: 2017-07-10 Taxonomist: Ecoanalysts Idaho
Taxa List (See key at end of report)

 Tolerance values color coding: Blue for sensitive, <32.20. Purple for intermediate, >=32.20 and <60. Red for tolerant, >=60.

Name Group RA RB Oxy Sap Sal Tr Mot GF Tol TN TP
Achnanthidium minutissimum Pennate Diatom 0.311 0.025 1 2 2 7 N P 41.2
Encyonema silesiacum Pennate Diatom 0.116 0.087 3 3 2 7 V S 46.9 43 69
Achnanthidium deflexum Pennate Diatom 0.072 0.013 1 2 3 N P 43.5 40 52
Heteroleibleinia Filamentous Cyanobacteria 0.070 0.000 NA 22 22
Fragilaria capucina Pennate Diatom 0.038 0.005 2 2 3 N V 32.9 59 51
Encyonema leibleinii Pennate Diatom 0.033 0.402 V S NA
Caloneis bacillum Pennate Diatom 0.029 0.018 2 2 2 4 M P 64.9 72 96
Unknown Rhodophyte Florideophycidae (Chantransia) Red Algae 0.027 0.013 47.5 48 68
Diatoma moniliformis Pennate Diatom 0.027 0.007 3 N U 52.8 27 36
Amphora pediculus Pennate Diatom 0.023 0.003 2 2 2 5 M P 76.2 71 93
Nitzschia dissipata Pennate Diatom 0.023 0.009 2 2 2 4 H P 60.9 48 75
Cocconeis placentula Pennate Diatom 0.017 0.019 3 2 2 5 N P NA 30 82
Gomphonema Pennate Diatom 0.017 0.017 N S 15.1
Synedra rumpens Pennate Diatom 0.015 0.003 2 2 N E 34.3 20 32
Navicula cryptocephala Pennate Diatom 0.015 0.008 3 3 2 7 M P 56.3 55 80
Navicula gregaria Pennate Diatom 0.015 0.005 4 3 3 5 M P 79.6 66 89
Cyclotella meneghiniana Centric Diatom 0.012 0.013 5 4 3 5 N U 72.6 55 73
Fragilaria vaucheriae Pennate Diatom 0.012 0.004 3 3 2 5 N V 44.2 36
Gomphonema calcifugum Pennate Diatom 0.008 0.003 N S NA
Gomphonema micropus Pennate Diatom 0.008 0.005 2 2 2 5 N S 39 72 89
Meridion circulare Pennate Diatom 0.008 0.007 2 2 2 7 N E 46.5 64 87
Gogorevia exilis Pennate Diatom 0.006 0.001 1 2 2 7 N P 51.1 63 91
Ctenophora pulchella Pennate Diatom 0.006 0.017 3 5 2 3 N E 49.7
Rhoicosphenia abbreviata Pennate Diatom 0.005 0.007 2 2 2 5 V S 83.4 72 96
Ulnaria ulna Pennate Diatom 0.005 0.145 3 4 2 N E 34.2 17 21
Navicula rhynchocephala Pennate Diatom 0.005 0.005 4 2 2 7 M P 62.1 44 78
Eolimna minima Pennate Diatom 0.005 0.001 4 4 2 5 M P 57 64 88
Eunotia Pennate Diatom 0.005 0.007 V E NA
Gomphonema parvulum Pennate Diatom 0.005 0.001 4 4 2 5 N S 42.2 21
Gomphonema truncatum Pennate Diatom 0.005 0.025 2 2 2 4 N S 36.5 47 44
Karayevia clevei Pennate Diatom 0.005 0.001 2 2 2 4 V P 54.3 72
Melosira varians Centric Diatom 0.005 0.035 3 3 2 5 N U 67 67 89
Navicula canalis Pennate Diatom 0.005 0.002 2 5 M P NA 50 89
Nitzschia Pennate Diatom 0.005 0.004 H P NA
Navicula lundii Pennate Diatom 0.003 0.003 2 2 2 5 M P NA
Diatoma vulgaris Pennate Diatom 0.003 0.017 2 2 2 4 N U 88.7 60 89
Fragilaria crotonensis Pennate Diatom 0.003 0.002 2 2 2 3 N V NA 53 64
Navicula seibigiana Pennate Diatom 0.003 0.001 M P NA
Nitzschia archibaldii Pennate Diatom 0.003 0.000 2 2 2 5 H P 60
Nitzschia linearis Pennate Diatom 0.003 0.013 2 2 2 4 H P 54.2 68 87
Nitzschia palea var. debilis Pennate Diatom 0.003 0.001 1 1 1 H P 53.4 47 79
Nitzschia recta Pennate Diatom 0.003 0.007 2 2 2 7 H P 46.6 43 73
Platessa bahlsii Pennate Diatom 0.003 0.000 V P NA
Sellaphora seminulum Pennate Diatom 0.002 0.000 4 4 2 5 M P 51.5 67 73
Simonsenia delognei Pennate Diatom 0.002 0.000 1 3 3 5 M P NA
Surirella minuta Pennate Diatom 0.002 0.002 3 3 2 5 H P 79.7 69 95
Planothidium frequentissimum Pennate Diatom 0.002 0.001 3 4 2 V P 65.1 69 92
Cymbopleura naviculiformis Pennate Diatom 0.002 0.001 2 2 2 5 V S 51.6 35 53
Diploneis elliptica Pennate Diatom 0.002 0.022 1 1 2 3 M P NA
Gomphonema minusculum Pennate Diatom 0.002 0.002 N S NA 38 51
Gomphonema pumilum Pennate Diatom 0.002 0.000 2 7 N S 43.6 14 21
Hippodonta hungarica Pennate Diatom 0.002 0.000 3 2 2 4 M P NA
Navicula perminuta Pennate Diatom 0.002 0.000 M P NA
Pinnularia gibba Pennate Diatom 0.002 0.007 3 3 2 7 M P NA
Navicula tripunctata Pennate Diatom 0.002 0.002 2 2 2 5 M P 69.4 76 88

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.