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 Maine Department of Environmental Protection
 Biological Monitoring Program
 Stream Algae Report

Site Information
Name: Kenduskeag Stream - Station 508 Sampled by: Biomonitoring Unit
Town: Corinth Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Penobscot And Downeast Sample ID: SA-508-2001R (53)
Sample Date: 2001-07-10 Taxonomist: Michigan State University
Location: Above Rte 11/43
Sample comments:
Latitude: 44.99364154
Longitude: -69.07249317

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 = 0.00
Prob. Class B = 0.90
Prob. Class C = 0.10
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 2.84 0.90 0.00 9.15 0.00 1.08 <90th percentile
Nutrient-tolerant diatom richness 13.00 8.00 3.00 17.00 0.00 8.00 <90th percentile
Intermediate diatom richness 22.00 19.00 11.00 28.80 9.00 25.30 10th to 90th percentile
Intolerant algae percent species 11.11 18.75 3.70 42.27 22.12 72.41 >10th percentile
Motile diatom percent abundance 8.26 8.49 1.55 31.56 0.00 11.59 <90th percentile
Tolerant algae percent abundance 3.62 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) 43.62 42.67 37.09 49.07 0.00 42.34 <90th percentile
Nitrogen Index (all algae) 41.47 38.64 26.81 51.56 0.00 35.58 <90th percentile
Phosphorus Index (all algae) 61.04 58.62 38.59 76.56 0.00 53.06 <90th percentile
Intolerant algae percent species 4.00 6.00 1.00 14.00 5.00 23.00 >10th percentile
Intolerant algae richness 16.67 6.25 0.00 16.00 0.00 7.14 <90th percentile
Salt-tolerant diatom percent richness 89.53 89.95 61.14 98.30 45.42 97.96 10th to 90th percentile
Tolerant algae percent richness 27.78 16.67 0.00 41.38 0.00 14.29 <90th percentile
Nutrient- tolerant diatom percent abundance 13.43 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 = 8 m
Riffle = 35 %
Run = 40 %
Pool = 25 %
Bedrock = 0 %
Boulder = 10 %
Cobble = 45 %
Gravel = 40 %
Sand = 5 %
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
Specific Conductance 2001-07-10 174 88.55 25.00 492.00 15.41 67.31 Microsiemens Per Centimeter
Dissolved Organic Carbon 2001-07-10 2.8 4.90 2.30 9.30 2.00 9.42 Milligrams Per Liter
Nitrate + Nitrite As Nitrogen 2001-07-10 0.25 0.08 0.02 0.61 0.01 0.09 Milligrams Per Liter
Orthophosphate As Phosphorus 2001-07-10 1 2.00 1.00 11.00 1.00 3.00 Micrograms Per Liter
Total Kjeldahl Nitrogen 2001-07-10 0.2 0.40 0.20 0.60 0.10 0.50 Milligrams Per Liter
Total Phosphorus 2001-07-10 10 18.00 7.00 48.00 4.00 18.00 Micrograms Per Liter
Viewing Bucket
Viewing Bucket Table
Cover type Percent cover Cover group
Mat 1-5mm Thick 8.89 Nuisance algae
Sand / Mud 12.70 Not algae
Mat Incomplete 10.48 Thin algal layer
Mat <1mm Thick 67.94 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): 66.9
Impervious Cover %: 3
Land Use Table
Cover Type Percent Category
Highly Urban 0.02 Developed
Urban 0.13 Developed
Residential 5.57 Developed
Water 0.97 Natural
Wetland 6.44 Natural
Forest 73.52 Natural
Grass 4.88 Agriculture
Tilled 8.11 Agriculture

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

Site Information
Name: Kenduskeag Stream - Station 508 Sampled by: Biomonitoring Unit
Town: Corinth Method: Rock Scrapings 1 Inch Circles
Biomonitoring Basin Penobscot And Downeast Sample ID: SA-508-2001R (53)
Sample Date: 2001-07-10 Taxonomist: Michigan State University
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 0.282 0.124 1 2 2 7 N P 41.2
Achnanthidium deflexum Pennate Diatom 0.160 0.145 1 2 3 N P 43.5 40 52
Audouinella Red Algae 0.125 0.092 47.5 54 69
Phormidium chalybeum Filamentous Cyanobacteria 0.100 0.043 42.6
Scenedesmus acutus Colonial Green 0.062 0.010 NA 61
Merismopedia tenuissima Cyanobacteria 0.053 0.001 47.6
Fragilaria gracilis Pennate Diatom 0.047 0.091 1 1 2 2 N V 30.6 18 22
Phormidium formosum Filamentous Cyanobacteria 0.027 0.002 42.6 23
Encyonopsis microcephala Pennate Diatom 0.023 0.015 1 1 2 4 V S 34.8 17 24
Delicata delicatula Pennate Diatom 0.013 0.044 1 1 1 1 V S 31.3 21 22
Navicula cryptocephala Pennate Diatom 0.009 0.025 3 3 2 7 M P 56.3 55 80
Ankistrodesmus falcatus Colonial Green 0.007 0.001 45.7 58 75
Gomphonema parvulum Pennate Diatom 0.007 0.013 4 4 2 5 N S 42.2 21
Gomphonema kobayasii Pennate Diatom 0.007 0.018 N S 71.2 50 79
Encyonema silesiacum Pennate Diatom 0.006 0.016 3 3 2 7 V S 46.9 43 69
Navicula veneta Pennate Diatom 0.006 0.013 4 4 3 5 M P 79.7 51 62
Navicula gregaria Pennate Diatom 0.005 0.014 4 3 3 5 M P 79.6 66 89
Gomphonema minutum Pennate Diatom 0.005 0.018 2 2 5 N S 54.6 61 55
Synedra rumpens Pennate Diatom 0.005 0.008 2 2 N E 34.3 20 32
Navicula phyllepta Pennate Diatom 0.005 0.016 M P NA
Gomphonema augur Pennate Diatom 0.004 0.063 1 2 2 4 N S NA
Nitzschia dissipata Pennate Diatom 0.004 0.014 2 2 2 4 H P 60.9 48 75
Navicula notha Pennate Diatom 0.003 0.006 M P 37.4 20 34
Staurosirella pinnata Pennate Diatom 0.002 0.005 1 2 2 7 N V 44.2 38 56
Nitzschia sublinearis Pennate Diatom 0.002 0.034 H P NA
Planothidium lanceolatum Pennate Diatom 0.002 0.003 3 3 2 5 V P 72.5 72 91
Ulnaria acus Pennate Diatom 0.002 0.017 2 3 2 5 N E 31.7 29 48
Cocconeis lineata Pennate Diatom 0.002 0.005 3 2 2 5 N P 51.5 62 82
Nitzschia gracilis Pennate Diatom 0.002 0.002 2 2 1 3 H P 46.9 22 64
Encyonema minutum Pennate Diatom 0.002 0.005 2 V S 50.2 21
Navicula trivialis Pennate Diatom 0.002 0.014 3 3 3 5 M P 78.6 68 98
Nitzschia frustulum Pennate Diatom 0.002 0.001 3 2 3 5 H P 50.4 53 88
Cosmarium angulosum var. concinnum Desmid 0.002 0.020 NA 18 15
Amphipleura pellucida Pennate Diatom 0.002 0.014 2 4 2 2 M P 43.8 20 59
Nitzschia perminuta Pennate Diatom 0.002 0.002 1 1 2 2 H P 56.7 53 76
Diploneis parma Pennate Diatom 0.002 0.036 M P NA
Navicula capitatoradiata Pennate Diatom 0.002 0.010 3 3 2 5 M P 68.5 62 78
Nitzschia palea Pennate Diatom 0.002 0.002 4 5 2 6 H P 60.3 67 89
Navicula hintzii Pennate Diatom 0.002 0.005 2 2 7 M P 42.1
Navicula tenelloides Pennate Diatom 0.002 0.002 1 1 2 5 M P 75.8 51 62
Tabellaria flocculosa Pennate Diatom 0.002 0.027 1 2 1 3 N U 18.8 17 32
Cyclotella meneghiniana Centric Diatom 0.002 0.002 5 4 3 5 N U 72.6 55 73

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.