One reason the percentage of organic carbon may have changed is due to the erosion. The erosion may have caused the levels of organic carbon to decrease because of the mineral input from the runoff. It can also be that during this time, houses were being developed which meant there was a removal of terrestrial vegetation which would have reduced the input of organic to the soil and this would have reduced the carbon in the runoff (Wetzel, 2001). The terrestrial plants form much of the organic matter, the organic carbon in plant tissue is transformed by microbial utilization and degradation both at the site of growth and during transportation of runoff (Wetzel, 2001).The highest percentage of carbon is at the bottom of the sediment can be because there was more terrestrial plants and less urban development at that
One reason the percentage of organic carbon may have changed is due to the erosion. The erosion may have caused the levels of organic carbon to decrease because of the mineral input from the runoff. It can also be that during this time, houses were being developed which meant there was a removal of terrestrial vegetation which would have reduced the input of organic to the soil and this would have reduced the carbon in the runoff (Wetzel, 2001). The terrestrial plants form much of the organic matter, the organic carbon in plant tissue is transformed by microbial utilization and degradation both at the site of growth and during transportation of runoff (Wetzel, 2001).The highest percentage of carbon is at the bottom of the sediment can be because there was more terrestrial plants and less urban development at that