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Summary of Data

CSI detectives report the data from each monitoring visit.

Visit 1

It is the first day to collect evidence in the case. Our job is to collect macroinvertebrates and decide if Caffee Creek is polluted. Caffee Creek flows into the Cahaba River on the Cahaba River National Wildlife Refuge. On the way into the refuge we see a Great Blue Heron and a turtle.

The date is December 12, 2006. The time is 11:30 a.m. First, we checked the latitude and longitude. The latitude is North 33 degrees 0'4 37.7" and the Longitude is West 87degrees 04' 21.9". The weather is clear and the water is calm. There is no debris in the water. The water depth is 10 inches; the water temperature is 9.5 degrees C. The air temperature is 16 degrees C. The pH is 6.0 in still water and 7.0 in moving water. The water has no odor. It rained on yesterday. The adjacent shoreline is wooded, sandy, and rocky. There are many plants hanging over the water on the opposite side of the creek. Algae are growing on the rocks in the water.

We choose a spot to begin our investigation and get to work. We are careful since the rocks in the water are slippery. We take our kick net into the water and begin the process of collecting macroinvertebrates. Jaylon and Breanne hold the net while Daniel disturbs the water. The net is weighted at the bottom and is 1/32 inch mesh. Sarah is the note-taker today. When 5 minutes pass, we take the net out of the water and look through the debris and rocks. When we finish there are only 8 macroinvertebrates. Maybe, the holes in our net are too large for the small macroinvertebrates.

There are mayflies, stoneflies, and caddisfly larvae. The overall water quality rating is 9 which is in the poor category, but there are not enough macroinvertebrates for this to be reliable. The good news is that all of the macroinvertebrates found are in the sensitive to pollution category.

We release the animals back to their natural habitat.

Visit 2

On January 12, 2007 we take our second visit to collect benthic macroinvertebrates from Caffee Creek. On the way to Caffee Creek we see a turtle and a bird. The water thermometer did not work today. The pH is 7.0 in running water and in still water. There has been no rain in the last few weeks. The sky is overcast and there is a heavy chop on the surface of the water. The water is cloudy which means it is not muddy, but it is not clear. There is no odor. There is no suspended material in the water.

The time is 11:30 a.m. and we begin collecting macroinvertebrates using the same method as before. This time we use a professional grade LaMotte kick net instead of the student grade kick net. It is 1 x 1 meter square, 500 micron. Sarah and Breanne hold the net and Daniel takes notes. Jaylon disturbs the water. We bring the kick net out of the water after 5 minutes and search for macroinvertebrates. There are only 6 benthic macroinvertebrates. One is in the somewhat sensitive category and the others are in the tolerant to pollution category. It was not a very good day for catching macroinvertebrates.

Mr. Miller, refuge manager and Elizabeth, the VISTA volunteer, Mr. Holsombeck, and Mr. Sansing are visitors today.

We release the animals back to their natural habitat.

The overall water quality rating is 7 which is in the poor category. However, we did not find enough macroinvertebrates for this to be reliable.

Visit 3

We are back at Caffee Creek for our third monitoring visit. We arrive a little later than usual. It rained for 24 hours two days ago. The water is very clear and calm. The water temperature is 11 degrees C. The air temperature is 15 degrees C. The pH is 7.0. There is a small amount of suspended material in the water. On the way into the refuge we see a large turtle. We also see a truck with a horse trailer parked nearby. When we arrive at Caffee Creek we see horse tracks going right through our monitoring site.

At 11:49 a.m. we begin to record our data. We enter the water with the net. Sarah disturbs the water and shuffles debris and rocks into the kick net. She picks up rocks and brushes them off into the net. We pull the net out of the water and sort through the debris and rocks. We find 6 benthic macroinvertebrates. We forgot the white plastic sheet to put the net on, so this makes finding the macroinvertebrates more difficult. We use a black trash bag to lay the net on. We did not have a good catch today. We find 1 macro in the sensitive category, 2 clams in the somewhat sensitive category, and 3 aquatic worms which are in the tolerant category.

We have two visitors today, Ms. Fancher and Mr. Parker.

Special Note: We begin to walk upstream after we used the kick net. We pick up rocks off the stream bed and find many, many macroinvertebrates. Most of these are stoneflies and mayflies. This is about 10 to 20 feet upstream from our regular monitoring site. We decide that next time we come we will monitor the water in this spot.

The overall water quality rating is 10 which is in the poor category. However, we find around 30 stoneflies and mayflies on rocks from the stream bed.

We decide we should do better job of bringing all of our equipment next time.

 

Visit 4

We are hopeful for a good catch today. We gather all of our equipment early so we won't forget anything this time! It has been 5 weeks since our last visit to Caffee Creek. The air temperature is 29 degrees C. We are excited to see 70 turtles and 1 Great Blue Heron on the road into the refuge.

The water temperature is much warmer than our other visits, 20.5 degrees C. The pH is 7.0 in running water and 7.5 in still water. The water depth is 11 inches at our monitoring site. The weather is warm and dry. It has not rained for several weeks. The water is clearer than any other visit. There is no suspended material in the water.

We begin to monitor the water at 11:45 a.m. We have a special guest, Ms. Owings, who taught biology before she retired. We go to the spot where we found so many macroinvertebrates on rocks on our last visit. There are many rocks here. Daniel and Breanne hold the net and Sarah disturbs the water. Sarah picks up rocks and brushes them off into the net. One large crayfish darts from under a rock and we hunt for it. It is grayish, white in color. We see another one under a rock and catch it with a mesh strainer. It has bluish green claws and body.

Benthic macroinvertebrates are fairly easy to find when we take the net out of the water. There are 22 mayfly larvae, 3 stonefly larvae, 8 caddisfly larvae, 1 dobsonfly, 3 water penny beetles, and 21 gilled snails in the sensitive category. In the somewhat sensitive category, there are 1 damselfly, 1 clam, and 2 crayfish. There are 3 aquatic worms found in the tolerant category.

The overall water quality rating is 22 which is in the good category. There is a total of 65 macroinvertebrates, so this is probably a reliable rating.

We had three visitors today. They are Ms. Owings, Mr. Miller, and Chris, a member of the refuge staff.

We released the macros back to their habitat.

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