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Table 1
Mean values of each measured parameter per depth in Cenote Jennifer in 1998 and 2009. Minor bold letters denote marked correlation among parameters. Major letters denote significant differences (p < 0.05) only in surface samples among samplings.
| 1998 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Depth sampling | Salinity | Temperature (°C) | pH | Dissolved Oxygen (mg l−1) | Total Hardness (mg/L) | Total Alcalinity (mg l−1) | Soluble Reactive Silicate (µmol l−1) | Ammonium (µmol l−1) | K+ (mg/L) | Hydrogen Sulfide (mg l−1) | Ca2+ (mg l−1) | Mg2+ (mg l−1) | SO42− (mg l−1) | Na+ (mg l−1) | Cl− (mg l−1) |
| Surface | 7.0A | 29.6A | 8.08 | 7.2A | 390.8 | 64.9 | 104.8A | 2.9A | 135.4 | 152.7 | 282.2 | 1144.1 | 5337.2 | 3748.2 | 7439.2 |
| 4.0 m | 12.5 | 29.0 | 7.33 | 6.8 | 390.8 | 64.9 | 104.8 | 2.9 | 135.4 | 152.7 | 282.2 | 1144.1 | 5337.2 | 3748.2 | 7439.2 |
| 8.0 m | 14.0 | 28.8 | 7.27 | 5.7 | 426.1 | 71.1 | 118.0 | 4.5 | 155.2 | 160.5 | 207.8 | 1409.9 | 4483.4 | 4072.2 | 8367.4 |
| 12.0 m | 15.0 | 27.7 | 7.19 | 0.0 | 465.4 | 77.0 | 231.8 | 7.9 | 174.8 | 207.9 | 174.3 | 1619.9 | 4135.3 | 4373.1 | 8942.8 |
| Marked correlation | a | b | a | b,c | c,d | d,e | c,f | b,c,d,e,f | d,e | c,f | d,e | d,e | d,e | d,e | d,e |
| 2009 | |||||||||||||||
| Depth sampling | Salinity | Temperature (°C) | – | Dissolved Oxygen (mg l−1) | Soluble Reactive Phosphorus (µmol l−1) | Total Phosphorus (µmol l−1) | Soluble Reactive Silicate (µmol l−1) | Ammonium (µmol l−1) | Nitrate + nitrite (µmol l−1) | Dissolved Inorganic Nitrogen (µmol l−1) | Total Nitrogen (µmol l−1) | – | – | – | – |
| Surface (March 1) | 15.0B | 25.3B | – | 6.4B | 0.1A | 0.6A | 64.5B | 4.5B | 0.7A | 5.2A | 77.0A | ||||
| Surface (March 2) | 16.0C | 26.3C | – | 10.3C | ND | 0.2B | 60.0C | 4.4C | 0.7A | 5.1A | 24.5B | ||||
| Surface (April 1) | 13.1D | 27.5D | – | 6.2D | 0.03B | 0.4A | 53.6D | 3.7D | 0.5 | 4.2B | 33.0C | ||||
| Surface (April 2) | 13.8E | 27.4E | – | 5.5E | 0.1A | 0.3A | 56.0D | 3.7D | 0.5A | 4.2B | 31.7C | ||||
| Surface (mean) | 14.5 | 26.6 | – | 7.1 | 0.07 | 0.3 | 58.5 | 4.1 | 0.6 | 4.7 | 41.5 | ||||
| Marked correlation | a | b | c | c | d | a,e | f | a,b | f | d,e |
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