TABLE 1.

Temperature, conductivity, irradiance, oxygen, sulfide, and DAPI counts from the depths studied in Lake Vilar

Date (day.mo)Depth (m)Temp (°C)Conductivity (μS cm−2)Light (μE m−2 s−1)Concn of:DAPI counts (105 cells/ml)
O2 (mg/liter)H2S (μM)Synechococcus sp.ChlorobiaceaeChromatiaceaeOther prokaryotes
19.020.2091,1218009.706.20BDBD250
4.75132,380100.21900.3211.3BD69.3
7.00132,37000.09860.287.0BD98.2
09.042.00141,3976513.1013.2BDBD31.4
4.25132,430<50.07204.0041.0BD130
7.00132,77000.07070.6114.2BD140
23.043.75151,180161.44ND0.40.8582.1
4.25141,660<50.0709ND260BD160
7.00142,04000.0837ND43.1BD122
08.054.15161,240<51.0140ND96.30.96131
4.40151,60000.0550ND1210.17161
21.054.20181,480ND0.2104ND2.313.364.2
4.40171,910ND0.0844ND1800.17131
05.062.00221,283ND9.408.61BDBD51.3
4.30191,467ND0.113ND0.916.197.4
  • a ND, not determined; BD, below detection limits.