Summer Phytoplankton Communities in Productive Ohio Reservoirs: Importance of Cyanobacteria, Ecoregion, and Land Use Patterns. Presented at the Ohio Academy of Sciences, 2012.

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4. 2

5. 3

6. EDP
ECBP
WAP
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7. EDP & WAP
ECBP
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8. Reservoir Maximum Chlorophyll Secchi
TN TP
Ecoregion Reservoir Area Depth n a Depth N:P
(µg/L) (µg/L)
(hectares) (m) (µg/L) (m)
Buckeye 1153 4 5 97.1 0.43 1544 67 30
Caesar Creek 1055 30 3 51.5 0.91 3370 47 85
Deer Creek Lake 522 11 2 18.4 1.35 3100 81 39
Griggs 157 6 2 39.6 0.8 5225 83 50
Eastern Hargus 53 12 1 24.8 1.1 1120 40 28
Corn Belt Kiser 159 4 3 53.8 0.82 813 63 12
Loramie 341 2 3 61.4 0.16 4460 632 19
Plains Madison 40 1 1 48 0.38 4110 86 48
Metzger 65 13 3 25 1.07 2907 31 91
O'Shaughnessy 369 12 3 45.2 0.61 5253 80 51
Mean 391 10 46 0.76 3190 121 45
Dale Walborn 271 9 3 54.6 0.61 1163 38 31
Deer Creek Reservoir 135 5 5 31.6 0.64 892 37 27
Erie Drift East Branch 163 5 1 168 0.43 940 77 12
LaDue 597 6 1 55.4 0.8 1850 29 64
Plain Rockwell 337 9 1 36.6 0.73 840 76 11
Mean 301 7 69 0.64 1137 51 29
Barnesville 19 10 7 10.4 1.93 474 19 55
Beaver Creek 45 9 4 22 1.29 1810 12 229
Caldwell 4 6 1 3.6 1.93 590 10 59
Maysville 18 - 1 4 5 540 5 108
Western Pike 5 9 1 4 1.2 500 5 100
Allegheny Stewart 4 8 1 11.1 1.91 420 5 84
Timbre Ridge 39 11 1 1.9 2.5 150 5 30
Plateau Vesuvius 58 8 3 8.1 0.53 317 15 24
White 135 7 1 2.2 0.2 - 15 -
Woodsfield 3 - 2 25.4 1.31 410 18 24
Mean 33 8 9 1.78 579 11 79
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9. Anabaena flos-aquae Aphanizomenon sp.
Cylindrospermopsis raciborskii Planktothrix agardhii
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10. Non N-Fixing Cyanobacteria N-Fixing Cyanobacteria Bacillariophyta Other
Eastern Corn Belt Plains
Buckeye (13 Aug 2009)
Buckeye (08 Oct 2009)
Griggs (31 Aug 2010)
Kiser (09 Jul 2009)
_
Agricultural
Kiser (23 Sep 2010) x=1
Loramie (05 Aug 2009)
Loramie (15 Sep 2010)
Metzger (16 Sep 2010) 9
O'Shaughnessy (12 Aug 2009)
O'Shaughnessy (01 Sep 2010)
Dale Walborn (10 Jul 2008) 1711
Dale Walborn (24 Jul 2008) 3500
Dale Walborn (20 Aug 2008) 3921 _
Erie Drift Plain
Deer Creek Reservoir (10 Jul 2008) 688
Deer Creek Reservoir (24 Jul 2008) 2781 x=1733
Deer Creek Reservoir (30 Jul 2008) 3306
Deer Creek Reservoir (20 Aug 2008) 2005
Deer Creek Reservoir (10 Sep 2008) 134
East Branch (08 Sep 2010) 535
LaDue (08 Sep 2010) 321
Forested
Rockwell (07 Sep 2010) 160
Western Allegheny Plateau
Barnesville Reservoirs (25 Aug 2009)
Barnesville Reservoirs (25 Aug 2009) 40 _
Barnesville Reservoirs (26 Aug 2009)
Barnesville Reservoirs (28 Sep 2010)
279
227
x=68
Beaver Creek (02 Sep 2009) 51
Beaver Creek (23 Sep 2010)
Maysville (01 Sep 2009)
Vesuvius (21 Sep 2010)
*
Woodsfield (29 Sep 2010) 17
0.00E+00 5.00E+06 1.00E+07 1.50E+07 2.00E+07 2.50E+07
Numbers indicate heterocysts per mL. Mean heterocysts are also shown. 3/mL)
*denotes values in this sample are 10 times higher than displayed Absolute Biovolume (µm 8

11. Non N-Fixing Cyanobacteria N-Fixing Cyanobacteria Bacillariophyta Other
Eastern Corn Belt Plains
Buckeye (13 Aug 2009)
Buckeye (08 Oct 2009)
Griggs (31 Aug 2010)
Kiser (09 Jul 2009)
Agricultural
Kiser (23 Sep 2010)
Loramie (05 Aug 2009)
Loramie (15 Sep 2010)
Metzger (16 Sep 2010)
O'Shaughnessy (12 Aug 2009)
O'Shaughnessy (01 Sep 2010)
Dale Walborn (10 Jul 2008)
Dale Walborn (24 Jul 2008)
Dale Walborn (20 Aug 2008)
Erie Drift Plain
Deer Creek Reservoir (10 Jul 2008)
Deer Creek Reservoir (24 Jul 2008)
Deer Creek Reservoir (30 Jul 2008)
Deer Creek Reservoir (20 Aug 2008)
Deer Creek Reservoir (10 Sep 2008)
East Branch (08 Sep 2010)
LaDue (08 Sep 2010)
Forested
Rockwell (07 Sep 2010)
Western Allegheny Plateau
Barnesville Reservoirs (25 Aug 2009)
Barnesville Reservoirs (25 Aug 2009)
Barnesville Reservoirs (26 Aug 2009)
Barnesville Reservoirs (28 Sep 2010)
Beaver Creek (02 Sep 2009)
Beaver Creek (23 Sep 2010)
Maysville (01 Sep 2009)
Vesuvius (21 Sep 2010)
Woodsfield (29 Sep 2010)
0% 20% 40% 60% 80% 100%
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13. Conductivity TN
TSS TP
Secchi Depth
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