生态环境与氧气含量

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1、WorksheetDataAnalysisModule11.FillinTableDA1.1byfollowingSteps1-6inModule1.A.TimeB.Temp.oCC.Dissolvedoxygen(mg/L)D.Dissolvedoxygenatsaturation(mg/L)E.Departurefromsaturation(C-D)F.Changeinoxygen(mg/L/hr)(C2-C1)G.Respiration(mg/L/hr)H.Gasexchangerate(mg/L/hr)I.Gasexchangerate*departure(E*H)J.G

2、rossprimaryproduction(mg/L/hr)(F+G+I)16:0030.87.527.450.0717:0030.66.547.48-0.94-0.986.550.71-0.674.918:0029.95.417.57-2.16-1.136.140.70-1.503.519:0028.84.307.72-3.42-1.125.650.68-2.322.220:0027.62.697.89-5.21-1.615.240.66-3.450.221:0026.61.798.02-6.23-0.904.910.65-4.040.022:0025.81.438.13-6.

3、71-0.364.670.64-4.280.023:0025.21.348.25-6.92-0.094.480.63-4.350.00:0024.61.308.32-7.02-0.034.340.62-4.36-0.11:0024.21.338.39-7.060.034.210.61-4.34-0.12:0023.81.378.45-7.090.034.110.61-4.32-0.23:0023.51.408.50-7.100.044.030.61-4.29-0.24:0023.31.418.50-7.100.003.980.60-4.28-0.35:0023.11.428.55

4、-7.130.013.940.60-4.28-0.36:0022.91.458.59-7.140.033.880.60-4.26-0.37:0022.81.768.60-6.840.313.860.60-4.070.18:0022.82.378.62-6.250.613.860.60-3.720.79:0022.93.268.58-5.320.903.920.60-3.191.610:0023.65.558.48-2.932.294.190.61-1.804.711:0025.18.238.24-0.012.684.790.64-0.017.512:0027.010.037.97

5、2.061.805.390.671.388.613:0028.510.557.752.790.525.940.691.938.414:0029.69.857.612.24-0.706.180.701.567.015:0029.98.437.570.85-1.436.370.710.605.516:0029.97.497.58-0.09-0.946.270.70-0.065.3________________________________________________________________________________________________________

6、________________________________________________________2.Whichdirectionisoxygendiffusing(intooroutofthewater)whenthevaluesarenegativeorpositive?当环境中氧气含量（Changeinoxygen）为负的时候氧气向水中扩散。反之，即为正的时候氧气扩散方向为向水外向。3.Atwhattimeofdayarechangesinoxygenconcentration(columnF)mostpositive?Why?约为10：00至12:00之间。

7、如上表所示此刻氧气含量（Changeinoxygen）数值最大，也就是说随着光照强度增强光合作用的作用达到最大。4.From1:00amtosunrise,dissolvedoxygenconcentrationsintableDA1-1areverylow,whyisthis?Atwhattimedoyouthinksunriseoccurred?是因为在黑暗中只发生呼吸作用以至于氧气被大量消耗。所以在7:00之后日光增强光合作用变强，氧气量开始恢复。WorksheetData