Species Diversity Lab Report
Species diversity of lithified samples from the Pliocene Jackson Bluff formation of Liberty County, Florida with notes on Fossil Diagenesis, Taphonomy, and preservation
Joel, Serena, University of South Florida Geology Department, Tampa, FL 33620
ABSTRACT- lithified rock samples containing Molluscan fauna were taken from the Pliocene age Jackson Bluff Formation located at the Alum Bluff in Liberty County Florida. The samples were brought back to the lab for interpretation and analysis. These samples contained mostly molds of taxa that were previously dissolved away by dissolution. Also, the samples were carefully separated and glued after all the salvageable taxa were isolated and identified with genus and species names. Counts of these …show more content…
Looking at the data from PAST, it is clearly evident that the paleo-community of the fossil assemblage was fairly dominated by the single Mulinia indet., species with a dominance number of 0.455. The closer this number was to one, the more dominated the community was, (Hammer etal. 2005). Also, when looking at the evenness data from PAST a number of 0.343 was shown, indicating that the community was more dominated than even because the closer this number was to one the more even the community was. The pie chart in Figure 4 shows the taxonomic composition of the fossil assemblage. This is important because it shows percentages of the individuals found in the entire assemblage and shows how much of what genus and species dominated the paleo-community. 65.0% of the fossil assemblage community was dominated by Mulinia indet., Figure 4. The only species that came close to that was Nucluana indet. with …show more content…
| 2 | 0 | 0 | 2 | Thracia indet. | 10 | 0 | 3 | 7 | Dentalium indet. | 14 | 1 | 3 | 10 | Cadulus indet. | 19 | 2 | 3 | 14 | Nucluana indet. | 24 | 0 | 8 | 16 | Mulinia indet. | 142 | 5 | 28 | 109 | TOTAL ABUNDANCES | 217 | 11 | 47 | 159 | | Percent of dissolved/ non-dissolved taxa | 5.07% | 21.66% | 73.27% |
Figure1, Map Showing location of The Alum Bluff Formation (Noles, 2009)
Figure 2, Geologic stratigraphic section of Alum Bluff (Jarzen et al. 2010). The fossil assemblage was found in the stratigraphic section where the arrow is pointing. In that location, there are lots of Argillaceous sand, and many molds of
Joel, Serena, University of South Florida Geology Department, Tampa, FL 33620
ABSTRACT- lithified rock samples containing Molluscan fauna were taken from the Pliocene age Jackson Bluff Formation located at the Alum Bluff in Liberty County Florida. The samples were brought back to the lab for interpretation and analysis. These samples contained mostly molds of taxa that were previously dissolved away by dissolution. Also, the samples were carefully separated and glued after all the salvageable taxa were isolated and identified with genus and species names. Counts of these …show more content…
Looking at the data from PAST, it is clearly evident that the paleo-community of the fossil assemblage was fairly dominated by the single Mulinia indet., species with a dominance number of 0.455. The closer this number was to one, the more dominated the community was, (Hammer etal. 2005). Also, when looking at the evenness data from PAST a number of 0.343 was shown, indicating that the community was more dominated than even because the closer this number was to one the more even the community was. The pie chart in Figure 4 shows the taxonomic composition of the fossil assemblage. This is important because it shows percentages of the individuals found in the entire assemblage and shows how much of what genus and species dominated the paleo-community. 65.0% of the fossil assemblage community was dominated by Mulinia indet., Figure 4. The only species that came close to that was Nucluana indet. with …show more content…
| 2 | 0 | 0 | 2 | Thracia indet. | 10 | 0 | 3 | 7 | Dentalium indet. | 14 | 1 | 3 | 10 | Cadulus indet. | 19 | 2 | 3 | 14 | Nucluana indet. | 24 | 0 | 8 | 16 | Mulinia indet. | 142 | 5 | 28 | 109 | TOTAL ABUNDANCES | 217 | 11 | 47 | 159 | | Percent of dissolved/ non-dissolved taxa | 5.07% | 21.66% | 73.27% |
Figure1, Map Showing location of The Alum Bluff Formation (Noles, 2009)
Figure 2, Geologic stratigraphic section of Alum Bluff (Jarzen et al. 2010). The fossil assemblage was found in the stratigraphic section where the arrow is pointing. In that location, there are lots of Argillaceous sand, and many molds of