A STUDY OF TURTLE DENSITY IN THE WHITE RIVER GROUP - PowerPoint PPT Presentation

1 / 13
About This Presentation
Title:

A STUDY OF TURTLE DENSITY IN THE WHITE RIVER GROUP

Description:

A STUDY OF TURTLE DENSITY IN THE WHITE RIVER GROUP. Joe Corsini, Toni Smith, and Mike Leite ... DENSITY CHANGES. 1) The lower Whitney Ash. 2) The Orella Whitney ... – PowerPoint PPT presentation

Number of Views:33
Avg rating:3.0/5.0
Slides: 14
Provided by: dons169
Category:

less

Transcript and Presenter's Notes

Title: A STUDY OF TURTLE DENSITY IN THE WHITE RIVER GROUP


1
A STUDY OF TURTLE DENSITY IN THE WHITE RIVER
GROUP
  • Joe Corsini, Toni Smith, and Mike Leite

2
Systematic Transecting And Area Determination
Use of GPS and GIS To Facilitate
SystematicTransecting
  • GPS tracklog function
  • to delineate the transect
  • 2)ARC-GIS to determine
  • surface area prospected

3
The Study Area
Toadstool Park
4
STRATIGRAPHY
5
Taphonomic Studies..
1) Size 2) Carapace orientation 3) Presence of
non-shell elements 4) Associated fossils 5)
Weathering and deformation
Noticed apparent differences in turtle density
at different stratigraphic levels
6
DENSITY CHANGES
1) The lower Whitney Ash
2) The Orella Whitney contact
7
Transects
  • A section of the escarpment
  • systematically prospected
  • 2) Area covered recorded with
  • GPS
  • 3) Number of turtles per square
  • meter calculated for each 10m
  • interval

8
Mike we need a gis image of the areas for an
example
9
Lower Whitney Ash
  • Three transects
  • Transected the interval from 90m to 145m above
    the Chamberlain Pass analysis performed on 10m
    bins
  • 2) Stratigraphically includes the lower Whitney
    Ash
  • 3) At a0.15 (85), FgtFcrit, thus the means are
    significantly different
  • 4) Using Scheffe test for comparison between
    groups, the difference occurs with 85 confidence
    between stratigraphic levels 105m to 115m and 125
    to 135m (above White River base)

10
Average Number of Turtles per Hectare
135m above White River Base
0/Ha
0.4/Ha
1.6/Ha
0.5/Ha
95m above White River Base
11
Orella Transects
  • Three transect areas averaged
  • Only two 10 meter bins
  • 3) Appears to be different
  • number of turtles in these two bins
  • (95 confidence)

12
1) GPS and Arc-GIS is a useful tool for
quantitating fossil organisms 2) There are
significant differences in the numbers of White
River turtles observed at various stratigraphic
levels
13
Thanks Grady Costello, Amanda Dopheide,
Nebraskas EPSCOR Grant
Write a Comment
User Comments (0)
About PowerShow.com