ML20148L045
| ML20148L045 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/30/1978 |
| From: | Reutter J TOLEDO EDISON CO. |
| To: | |
| Shared Package | |
| ML20148L004 | List: |
| References | |
| TAC-11339, TAC-11601, NUDOCS 7811200100 | |
| Download: ML20148L045 (7) | |
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.% CLEAR TECHNICAL REPORT NO. 89 BENTHIC MACROINVERTEBRATE POPULATIONS IN LAKE ERIE NEAR THE DAVIS-BESSE NUCLEAR POWER STATION DURING 1977 Environmental Technical Specifications Sec. 3.1. 2. a. 2 Beiithic Studies Prepared by Jeffrey M. Reutter Prepared for Toledo Edison Company Toledo, Ohio THE OHIO STATE UNIVERSITY CENTER FOR LAKE ERIE AREA RESEARCH COLUMBUS, OHIO September 1978 i 1781110 DId
I I l 3.1.2.a.2 Benthic Studies l Procedures Benthic macroinvertebrates were collected approximately once every 60 daysfromAprilthrougpNovember(Table 1). Three' replicates using a Ponar dredge (Area = 0.052 m ) were collected at Stations 1, 3, 8, 9, 13, 14, 15, 17, 18, and 26 on each date (Figure 1). Samples were sieved on the boat through a U.S. #40 soil sieve, preserved in 10% formalin and returned to the laboratory for identification and enumeration. Individuals were ~ indentified as f ar as practicable (usually to genus; to fpecies when possible). Results were re-ported as number of organisms per m and computed by multiplying the number of each species in each replicate grab sample by 19.1. Results Benthic macroinvertebrates collected April through .0ctober 1977 were grouped in 37 taxa, generally to the genus or species level within 4 phyla (Table 2). Two taxa were in Coelenterata, 12 in Annelida, 17 in Arthropoda, and 6 in Mollusca. 2 Totalpopulgtionsrangedfrom1,557/m in June to 2,658/m3 in August with a mean of 1,854/m . These populations were dominated by Annelids which made up 63.5 percent of the total benthos population and Arthropods which made up 32.7 percent of the total benthos population. Annelids dominated the total popu-lation in April, June, and October while Arthropods dominated in August. Immature oligochaetes were always the dominant Annelid taxa while Arthropoda wasdominatedbyCryptochironomussp.inApril,LeptodorakindtiiinJuneang Tanytarsussp.inAygustandOctober. Annelid populations ranged from 82 in June to 1,44g/m in April. Arthropod populations ranged from 145/ml/m in April to 1,583/m in August. All raw data were keypunched and maintained on file at the offices of the Center for Lake Erie Area Research in Columbus, Ohio. Analysis , Benthic macroinvertebrate populations collected at Locust Point during 1977 were typical for populations along the south shore of western Lake Erie and similar to those observed during preceding years (Figure 2). Species. composition, mainly immature oligochaetes and chironomids, was also similar to that observed from 1972-1976 (Reutter and Herdendorf, 1977). As observed in the past, populations at Station 13 (plume area) appear inhibited. Personal observation indicates that this is probably due to a lack of suitable substrate at this station.as it is mainly hard clay. In conclusion, it appears that the Davis-Besse Nuclear Power Station is not having an adverse impact on populations of benthic macroinvertebrates at Locust Point.
n TABLE 1-MONTHLY MEAN BENTHIC MACR 0 INVERTEBRATE POPULATIONS
- FROM SAMPLING STATIONS AT LOCUST POINT LAKE ERIE - 1977 Date April June August' October Grand 27 22 16 3' Mean Station 1 191 191 255 815 364' 3 1910 1356 1477 83 1206 8 2623 1585 4164 611 2246 9 1865 3202 6679 4730 4119 13 127 1776 777 592 818 14 3642 1477 2610 4571 3075 15 478 1547 618 121 691 17 382 344 344 312 345 18 2540 2292 2865 3725 2855 26 2165 1795 6793 528 2820
' Grand Mean 1592 1557 2658 1609 1854 i l
l 1 l l l l l l
- Data presented as number of organisms per m2and computed H from 3 grabs with a Ponar dredge (A=0.052 m ) at each station l on:the dates indicated.
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- DAVIS-BESSE NUCLEAR POWER STATION, UNIT'l AQUATIC SAMPLING STATIONS t
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. i TABLE 2 1
MONTHLY MEAN POPULATIONS
- OF' INDIVIDUAL BENTHIC MACR 0 INVERTEBRATE TAXA'AT LOCUST POINT - 1977 l
l l TAIA April June Au9ust October Grand Mean COCLINT[ RATA Hydrasp.(buddin9 polyp) 0.0 117.2 4.5 28.0 37.4 Hvora 0.0 93.0 2.6 SubtotD'~ sp. (single polyp)
' 28.7 31.0 i O.0 210.1 7.0 56.7 68.4 '
ANNELIDA Hirudinea Helobdella elonosta , 0. 6 1.3 0.6 0.6 0.8 H. stagnalis 3.2 1.3 0.6 0.0 1.3 011%haeta Imatures (hair setae) 0.6 0.0 0.0 1312.2 328.2 1 matures (nohairsetae) 1289.3 711.8 939.1 14.0 738.5 l Branchiura sowerby1 5.7 1.3 4.5 1.9 3.3 Limnodrilus cervix 7.6 7.0 4.5 0.6 4.9 L. claperdetanus 0.6 0.0 0.0 0.0 C claperdelanus-cervia 0.2 0.0 0.6 0.0 0.6 0.3 i C maumeensis 1,3 1.3 1.3 0.6 1.1 ) C lid'ekemi anus ' '1.3 0.0 0.0 0.0 0.3 Uphidonais serpentina } 103.8 69.4 107.6 8.9 72.4 l Potamothris moldaviensis 33.7 28.0 9.6 31.8 25.8 Subtotal 1447.8 821.9 1067.7 1371.4 1177.2 AATHR0P00A Cladocera Leptodora kindtii 10.2 442.5 64.9 11.5 132.3 Amphipode Gamarus f asciatus 0.6 34.4 3.2 17.8 14.0 l Hyalella arteca 0.6 0.0 0.0 0.0 0.2 Isopoda - Asellus sp. 0.0 1.3 0.0 0.6 0.f Diptera Caaoborus sp. 0.0 0.0 ' O.6 0.0 0.2 chironomus sp. 14.0 . 7.6 53.5 26.1 25.3 cntronomus pupa 0.0 0.0 1.3 0.0 O.3
. cryptochirnnomus sp. 57.3 27.4 3.8 17.8 26.6 I
U yptochironomus pupa 0.0 0.0 0.6 0.0 0.2 Glyptotendipes sp. 1.3 1.9 0.0 25.5 7.2 Polypedilum sp. 3.2 4.5 11.5 0.0 4.8 Procladvis sp. 34.4 0.0 38.2 24.2 24.2 Procladuis pupa 0.0 0.0 0.6 0.0 0.2 Tanyt ars ut, sp. 22.3 1.3 1373.9 53.5 362.7 Tanytarsus pupa 0.0 0.0 31.2 0.0 7.8 [phemeroptera Caenis sp. 0.6 0.0 0.0 0.6 0.3 i Trichoptera Cheumatopsyche sp. 0.0 0.0 0.0 1.9 0.5 Subtotal 144.5 519.5 1583.4 '179.5 606.7 MOLLUSCA Gastropoda Bithnia tentaculata ' 0.0 1.3 0.0 0.0 0.3 Physe sp. 0.0 0.0 0.0 1.3 0.3 Pelecypoda Amblema sp. 0.0 1.3 0.0 0.0 0.3 L igumia sp. 0.0 0.6 0.0 0.0 0.2 Proptera sp. . 0.0 1.3 0.0 0.0 0.3 Ouaorula sp. 0.0 0.6 0.0 0.0 0.2 Subtotal 0.0 5.1 0.0 1.3 1.6 TOTAL 1592.3 1556.7 2658.1 1608.9 1854.0 DD
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FIGURE 2 . MONTHLY MEAN BENTHIC MACR 0 INVERTEBRATE POPULATIONS FOR LAKE ERIE AT LOCUST POINT, 1972 - 1977. 4000- -
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r LITERATURE CITED: Reutter, J.M- and C.E. Herdendorf. . 1977.
. Pre-operational aquatic ecology ~ !
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monitoring program. for . the Davis-Besse Nuclear Power Station, Unit'I. _ The_0hio State Univ., CLEAR, Columbus, Ohio; . 205 pp. i e r f i I l r
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