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 Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: Piscataquis River - Station 152 Sampled by: Biomonitoring Unit
Town: Dover-Foxcroft Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Penobscot And Downeast Sample ID: SA-152-2006R (537)
Sample Date: 2006-06-27 Taxonomist: Academy Of Natural Sciences
Location: 1 Km Below Dover - Foxcroft Potw
Sample comments:
Latitude: 45.18563052
Longitude: -69.16803792

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 = B
Attains Class = YES
Reason = Model
Model Result = B
Prob. Class A = 0.39
Prob. Class B = 0.61
Prob. Class C = 0.00
Prob. NA = 0.00

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 3.69 0.90 0.00 9.15 0.00 1.08 <90th percentile
Nutrient-tolerant diatom richness 11.00 8.00 3.00 17.00 0.00 8.00 <90th percentile
Intermediate diatom richness 25.00 19.00 11.00 28.80 9.00 25.30 10th to 90th percentile
Intolerant algae percent species 21.05 18.75 3.70 42.27 22.12 72.41 >10th percentile
Motile diatom percent abundance 3.67 8.49 1.55 31.56 0.00 11.59 <90th percentile
Tolerant algae percent abundance 0.47 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) 42.00 42.67 37.09 49.07 0.00 42.34 <90th percentile
Nitrogen Index (all algae) 39.56 38.64 26.81 51.56 0.00 35.58 <90th percentile
Phosphorus Index (all algae) 61.37 58.62 38.59 76.56 0.00 53.06 <90th percentile
Intolerant algae percent species 8.00 6.00 1.00 14.00 5.00 23.00 >10th percentile
Intolerant algae richness 6.67 6.25 0.00 16.00 0.00 7.14 <90th percentile
Salt-tolerant diatom percent richness 89.68 89.95 61.14 98.30 45.42 97.96 10th to 90th percentile
Tolerant algae percent richness 13.16 16.67 0.00 41.38 0.00 14.29 <90th percentile
Nutrient- tolerant diatom percent abundance 16.36 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

Wetted width = 48 m
Water velocity = 41 cm/s
Run = 100 %
Bedrock = 10 %
Boulder = 30 %
Cobble = 40 %
Gravel = 20 %
Sand = 0 %
Silt = 0 %
Clay = 0 %
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 2006-06-27 8.55 8.60 7.00 10.23 7.80 10.62 Milligrams Per Liter
pH 2006-06-27 7.41 7.12 6.21 7.97 6.00 7.55 Standard Ph Unit
Specific Conductance 2006-06-27 51 88.55 25.00 492.00 15.41 67.31 Microsiemens Per Centimeter
Temperature 2006-06-27 21.5 20.00 14.70 24.70 12.80 23.60 Degrees Celcius (Temperature)
Dissolved Organic Carbon 2006-06-27 4.9 4.90 2.30 9.30 2.00 9.42 Milligrams Per Liter
Nitrate + Nitrite As Nitrogen 2006-06-27 0.06 0.08 0.02 0.61 0.01 0.09 Milligrams Per Liter
Orthophosphate As Phosphorus 2006-06-27 8 2.00 1.00 11.00 1.00 3.00 Micrograms Per Liter
Total Alkalinity 2006-06-27 21 19.50 4.44 113.20 2.00 21.00 Milligrams Per Liter
Total Kjeldahl Nitrogen 2006-06-27 0.6 0.40 0.20 0.60 0.10 0.50 Milligrams Per Liter
Total Phosphorus 2006-06-27 24 18.00 7.00 48.00 4.00 18.00 Micrograms Per Liter
Viewing Bucket
Viewing Bucket Table
Cover type Percent cover Cover group
Filament 1-5cm Long 16.98 Nuisance algae
Filament 5-15cm Long 4.72 Nuisance algae
Filament >15cm Long 2.83 Nuisance algae
Plant 9.43 Not algae
Sand / Mud 15.09 Not algae
Mat Incomplete 25.47 Thin algal layer
Mat <1mm Thick 25.47 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): 930.5
Impervious Cover %: 1
Land Use Table
Cover Type Percent Category
Highly Urban 0.21 Developed
Urban 0.15 Developed
Residential 3.50 Developed
Water 2.12 Natural
Wetland 3.29 Natural
Forest 87.42 Natural
Grass 1.30 Agriculture
Cleared 0.04 Agriculture
Tilled 1.78 Agriculture

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

Site Information
Name: Piscataquis River - Station 152 Sampled by: Biomonitoring Unit
Town: Dover-Foxcroft Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Penobscot And Downeast Sample ID: SA-152-2006R (537)
Sample Date: 2006-06-27 Taxonomist: Academy Of Natural Sciences
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
Homoeothrix janthina Filamentous Cyanobacteria 0.567 0.007 43 19 21
Phormidium autumnale Filamentous Cyanobacteria 0.215 0.036 42.6 37 72
Gomphonema rhombicum Pennate Diatom 0.090 0.123 N S 32.1 28 36
Achnanthidium deflexum Pennate Diatom 0.046 0.011 1 2 3 N P 43.5 40 52
Homoeothrix juliana Filamentous Cyanobacteria 0.028 0.011 NA 32
Oedogonium Filamentous Green 0.011 0.707 37.6 27 47
Audouinella Red Algae 0.008 0.008 47.5 54 69
Achnanthidium minutissimum Pennate Diatom 0.004 0.000 1 2 2 7 N P 41.2
Encyonema silesiacum Pennate Diatom 0.004 0.003 3 3 2 7 V S 46.9 43 69
Ulnaria ulna Pennate Diatom 0.003 0.055 3 4 2 N E 34.2 17 21
Caloneis bacillum Pennate Diatom 0.002 0.003 2 2 2 4 M P 64.9 72 96
Gomphonema hutchinsoniana Pennate Diatom 0.002 0.000 N S 51.6 43 75
Diatoma tenuis Pennate Diatom 0.002 0.001 3 3 3 5 N U 46.8 52 86
Cocconeis lineata Pennate Diatom 0.002 0.007 3 2 2 5 N P 51.5 62 82
Ulnaria acus Pennate Diatom 0.002 0.009 2 3 2 5 N E 31.7 29 48
Fragilaria vaucheriae Pennate Diatom 0.001 0.000 3 3 2 5 N V 44.2 36
Adlafia suchlandtii Pennate Diatom 0.001 0.000 M P 29.1 33 65
Gomphonema parvulum Pennate Diatom 0.001 0.000 4 4 2 5 N S 42.2 21
Staurosira construens var. venter Pennate Diatom 0.001 0.000 1 2 2 4 N V 41.3 35 67
Cymbella reichardtii Pennate Diatom 0.001 0.000 V S NA
Encyonema neogracile Pennate Diatom 0.001 0.000 1 1 1 2 V S 24 7
Planothidium frequentissimum Pennate Diatom 0.001 0.000 3 4 2 V P 65.1 69 92
Delicata delicatula Pennate Diatom 0.001 0.000 1 1 1 1 V S 31.3 21 22
Achnanthidium subhudsonis var. kraeuselii Pennate Diatom 0.001 0.000 V P 57 33 89
Encyonema minutum Pennate Diatom 0.001 0.000 2 V S 50.2 21
Tabellaria flocculosa Pennate Diatom 0.001 0.001 1 2 1 3 N U 18.8 17 32
Navicula menisculus Pennate Diatom 0.001 0.001 3 3 2 5 M P 64.3 44 72
Nitzschia frustulum Pennate Diatom 0.001 0.000 3 2 3 5 H P 50.4 53 88
Reimeria sinuata Pennate Diatom 0.001 0.000 1 2 2 3 M P 60.9 65 88
Eunotia implicata Pennate Diatom 0.001 0.008 1 V E 28.3 16 15
Gomphonema minusculum Pennate Diatom 0.000 0.000 N S NA 38 51
Fragilaria capucina Pennate Diatom 0.000 0.000 2 2 3 N V 32.9 59 51
Geissleria decussis Pennate Diatom 0.000 0.000 1 2 4 M P 44.5 40 80
Gomphonema pumilum Pennate Diatom 0.000 0.000 2 7 N S 43.6 14 21
Planothidium rostratum Pennate Diatom 0.000 0.000 3 3 2 5 V P 56.6 48 96
Psammothidium grischunum fo. daonensis Pennate Diatom 0.000 0.000 1 1 1 1 V P 30.2 31 39
Cocconeis placentula var. euglypta Pennate Diatom 0.000 0.001 3 2 2 5 N P 58.2 45 81
Navicula cryptocephala Pennate Diatom 0.000 0.000 3 3 2 7 M P 56.3 55 80
Pinnularia biceps Pennate Diatom 0.000 0.002 M P NA
Pseudostaurosira brevistriata Pennate Diatom 0.000 0.000 1 1 2 7 N E 32.2 46 45
Eolimna minima Pennate Diatom 0.000 0.000 4 4 2 5 M P 57 64 88
Nitzschia amphibia Pennate Diatom 0.000 0.000 3 3 2 5 H P 79.8 53 93

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.