Recent Changes

Wednesday, December 7

  1. page Scientific Report edited ... Figure 1 shows the total number of individual mature adult turtles found from throughout the s…
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    Figure 1 shows the total number of individual mature adult turtles found from throughout the study from 2005-2011 and does not include deaths or juvenile turtles. Figure 2 shows the turtle finds from 2005-2011 by individual year and gender, it does not distinguish between newly discovered turtles and recaptured. Figure 3 further elaborates on Figure 2 by showing the amount of turtles captured each individual year by gender but also the amount recaptured each year and offers a comparison of recaptured to total found, throughout the study there were 94 total “captures” with 36 recaptures. Using this data, it was determined through a mathematical equation that a good estimate for the Lovett Campus’ box turtle population is about 91 turtles. Figures 4 and 5 show the average measurements of Sexual Dimorphism of the population, separated by gender, compared to those of Alcatraz. Figure 4 shows Turtle Length, Shell Width and Shell Depth while Figure 5 shows Mass in grams. Figure 6 shows the Average Home Range size of the campus population, separated by gender, compared to that of Alcatraz. Figure 7 shows the correlation between temperature and whether or not Alcatraz was buried on the day of a find. Figure 8 agives an aerial view of Alcatraz’ home range with his potential hibernation spot circled in yellow, as can be seen it is highly encroached upon by the baseball complex and is located between the baseball fields and Denny Field in Intermittent Valley. Figure 8b gives an aerial view of the entire campus and it's potential turtle habitat which has been severely encroached upon by construction. Figure 9 depicts the topographical map used throughout the study to chart Alcatraz’ movements and the surrounding terrain to give a better idea of what his home range might be with a key below it. Figure 10 shows the data, up to this point, that has been recorded on the turtles whose home ranges were probably obstructed by the construction and Figure 11 shows the frequency of turtle captures in this area encompassing Intermittent and Rainy Day valleys before construction and after, as can be seen there is a significant decrease after the construction began in 2009.
    Discussion:
    In the years following the constructionThe readjustment of Alcatraz’ home range post-construction as well as the baseball fieldfact that the data
    ...
    the construction site.site post-construction supports the notion that human interference and habitat fragmentation have a negative impact on box turtle population. Several scientific
    ...
    ecosystem that fragmented habitat.caused habitat fragmentation. Figure 11 that shows the
    ...
    seen again. These results show an obvious correlation between the construction and population decline in the Intermittent-Rainy Day Valley area. In Nazdrowcz
    ...
    Fragmented Landscape,” theirthe data supports
    ...
    Lovett’s campus, sinceas they witnessed a similar occurrencepopulation decline in their study.
    Furthermore,
    study due to human encroachment and habitat fragmentation.
    One of
    the disturbance created byreasons the leveling ofconstruction had such a significant impact on the baseball fieldsbox turtle population was because it had such a serious
    ...
    construction area. TurtlesSome Turtles, such as Alcatraz adjustedAlcatraz, were able to adjust their home
    ...
    in figures 78 and 8.9 as Alcatraz’ new home range post-construction was .712 acres which is close to the overall campus average of .774 acres. Scientist Robert
    ...
    ranges. Figure 78 shows the
    ...
    on campus.
    By using telemetry to determine Alcatraz’s home range,
    However, the data from figures 10 and 11 would suggest that a fair amount of turtles, such as Lebron whose shell was found close to the wailing wall in Intermittent Valley, could have died due to this habitat fragmentation and human interference.
    This fragmentation theory was also supported by the
    surfeit of qualitative data was gathered.gathered while using telemetry to study Alcatraz’ movements. For example,
    ...
    population shows thatthat, even if
    ...
    habitat is primeprime, fragmented habitat
    ...
    turtle populations.
    Anecdotal data also contributes to any further conservation efforts. Alcatraz was observed in close proximity to young oak saplings and his probable hibernation spot was surrounded by them. Oak saplings provide wind shielding as well as drop a significant amount of leaf litter which is a key factor to Alcatraz’ survival. Alcatraz was frequently found close to muskadine plants, which have been known to be key resources for Eastern Box Turtles as supported in the study of the Anita C. Leight Estuary Center and Alcatraz’ supposed preference would indicate the muskadine plant as imperative to Eastern Box Turtle survival on the Lovett Campus. By compiling the data from different groups, the densely populated, critical box turtle habitat can be identified and saved from further encroachment as the construction of the baseball field encroached on a very highly dense area. This data can be used to advise further construction efforts so that they do not caused significant population decimation to this keystone species.
    The data collected over the years allowed for an estimation of the on-campus turtle population. This estimation of about 91 turtles shows that even though turtles may not seem to frequent a certain area on campus, there is a high probability that local species of Terrapene Carolina Carolina is in fact located in any wooded part of the campus with ample leaf litter and critical resources like mushrooms and muskadine plants. This information forces a certain amount of prudence to be undertaken by anyone interfering with on-campus ecosystem. As the campus serves as a microcosm for larger turtle populations, this data adds significant importance to the fact that while Eastern Box Turtles may not be seen, they are most certainly affected by changes in the environment.
    The study showed how what can be perceived as small changes ot the environment can have huge affects. As the Eastern Box Turtle is a keystone species, the decimation of its population indicates a negative effect on the entire biotic community. Though the study was based on just one population of turtles it serves as a microcosm for the effects of human interference on the environment and how these effects can be mitigated.

    Works Cited:
    Carroll, Lindsay, and Delgado Patricia. "Eastern Box Turtle Study." Anita C.
    (view changes)
    5:58 am
  2. page Scientific Report edited ... A. The objective of the experiment was to track and observe the movements of Eastern Box Turtl…
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    A. The objective of the experiment was to track and observe the movements of Eastern Box Turtles to determine home range, movement patterns, and possible hibernation spots. Using this data along with data collected by other groups, past groups, as well as anecdotal evidence it was possible to determine how Turtles on the Lovett Campus interact with the biotic community and man-made habitat changes as well as determine key environmental factors critical to the survival of Terrapene Carolina Carolina.
    B. Initially, in order to track turtles one turtle per group had to be captured. The turtle was sexed and identified to be a male named Alcatraz based off of a shell pattern database. Then, measurements of weight, length, width and shell depth were taken to track the turtle’s growth as he has been recaptured multiple times since the study started in 2005. Finally, the turtles were tracked using telemetry. First a transmitter was securely fastened to the back of each individual turtles shell with Velcro and industrial strength duct-tape. Then each turtle was released where he had been previously captured. Next once a week over the over the next 3 months, each group tracked their turtle using an attenuator corresponding to the signal emitted by the transmitter and the turtle’s movements, position based off a compass reading and surrounding habitat were recorded along with other anecdotal evidence.
    ...
    by using qualitative anecdotal evidence,
    ...
    the experiment. Also significant to the report was the comparing of Alcatraz' data to that of other turtles in the same area as well as Alcatraz' past data. Such comparisons assisted in showing Alcatraz' reaction to habitat fragmentation and other factors.
    D. With Alcatraz’ home range at about .712 acres, an argument can be made that Eastern Box Turtles have the ability to shift their home ranges due to obstruction of home range or natural stresses. Recent construction resulted in a baseball field being built on the majority of Alcatraz’ past home range yet his home range size is still only slightly below the average home range of male turtles on the Lovett Campus, .774 acres. This apparent shift in home range shows the Eastern Box Turtles ability to adapt and survive in it’s environment. However, passed data showed that the construction resulted in the death of a still unknown number of box turtle so human interference with box turtles should be kept at a minimum to ensure their survival. The anecdotal evidence collected showed what parts of the ecosystem are critical to the survival of the Eastern Box Turtle as well as how the box turtle might react to certain changes like increasing heat or cold. By recognizing parts of the environment critical to the campus population of Eastern Box Turtle’s survival it will be easier to insure the survival of the population of Terrapene Carolina Carolina if future construction or other human interference seems eminent. Overall, the campus is a microcosm for how a larger population can be affected by human changes in the environment and how these larger populations could be protected as they inevitably interact with human beings.
    Introduction:
    (view changes)
    4:53 am
  3. page Scientific Report edited ... Area of highest density of turtle captures on Campus Results: ... Figure 8 gives agives …
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    Area of highest density of turtle captures on Campus
    Results:
    ...
    Figure 8 givesagives an aerial
    ...
    Intermittent Valley. Figure 8b gives an aerial view of the entire campus and it's potential turtle habitat which has been severely encroached upon by construction. Figure 9
    Discussion:
    In the years following the construction of the baseball field the data shows a decrease in turtle population in the area surrounding the construction site. Several scientific reports support these findings; for example, a report published by researchers in Florida called “The Influence of Disturbance Events on the Survival and Dispersal Rates of Box Turtles” reports a decline in the turtle populations following a human disturbance to an ecosystem that fragmented habitat. Figure 11 that shows the number of turtles captured in the two years before the construction of the baseball field is 55% higher than the number of turtles captured following the construction of the fields. Not to mention 12 of the 21 turtles that were at one point captured before the construction of the field were never seen again. In Nazdrowcz and Roth’s report, “ Population Ecology of the Eastern Box Turtle in a Fragmented Landscape,” their data supports the decline in population that follows the habitat destruction and fragmentation seen on Lovett’s campus, since they witnessed a similar occurrence in their study.
    (view changes)
    4:35 am

Tuesday, December 6

  1. page Scientific Report edited ... Figure 8 {Screen_shot_2011-12-06_at_10.13.38_AM.png} The a.)The satellite image indicat…
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    Figure 8
    {Screen_shot_2011-12-06_at_10.13.38_AM.png}
    Thea.)The satellite image
    indicate Alcatraz's rough home range. Prior to 2009, the majority of Alcatraz's
    home range was located in what is now the outfield of the baseball field.The
    yellow circle indicates his hibernation location.
    {Screen_shot_2011-12-07_at_12.53.14_AM.png}
    b.) The red boxes indicate potential turtle habitat and the fragmented nature of Lovett's remaining habitat.

    Figure 9
    {Topomap.jpg}
    ...
    (Finds labeled) Same area as figure 8 a.
    {TopoKey.jpg}
    Home Range ~ .712 Acres or .288 hectares
    (view changes)
    9:51 pm
  2. page Scientific Report edited ... College, 5 Feb. 2004. Web. 6 Dec. 2011. <http://www.bio.davidson.edu/ people/midorcas/rese…
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    College, 5 Feb. 2004. Web. 6 Dec. 2011. <http://www.bio.davidson.edu/
    people/midorcas/research/Contribute/box%20turtle/boxmain.htm>.
    "Population Ecology of the Eastern Box Turtle in a fragmented Landscape"
    Nathan H. Nazdrowicz, Jacob L. Bowman, Roland R. Roth
    The Journal of Wildlife Management, Vol. 72, No. 3 (Apr., 2008), pp. 745-753
    Dec. 2011, JSTOR
    "The Influence of Disturbance Events On Survival and Dispersal Rates of Florida Box Turtles"
    C. Kenneth Dodd Jr., Arpat Ozgul, Madan K. Oli
    Ecological Applications, Vol. 16, No. 5 (Oct., 2006), pp. 1936-1944
    Dec. 2011, JSTOR

    (view changes)
    9:45 pm
  3. page Scientific Report edited ... 9 Area of highest density of turtle captures on Campus Results: Figure 1 shows the total n…
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    9
    Area of highest density of turtle captures on Campus
    Results:
    Figure 1 shows the total number of individual mature adult turtles found from throughout the study from 2005-2011 and does not include deaths or juvenile turtles. Figure 2 shows the turtle finds from 2005-2011 by individual year and gender, it does not distinguish between newly discovered turtles and recaptured. Figure 3 further elaborates on Figure 2 by showing the amount of turtles captured each individual year by gender but also the amount recaptured each year and offers a comparison of recaptured to total found, throughout the study there were 94 total “captures” with 36 recaptures. Using this data, it was determined through a mathematical equation that a good estimate for the Lovett Campus’ box turtle population is about 91 turtles. Figures 4 and 5 show the average measurements of Sexual Dimorphism of the population, separated by gender, compared to those of Alcatraz. Figure 4 shows Turtle Length, Shell Width and Shell Depth while Figure 5 shows Mass in grams. Figure 6 shows the Average Home Range size of the campus population, separated by gender, compared to that of Alcatraz. Figure 7 shows the correlation between temperature and whether or not Alcatraz was buried on the day of a find. Figure 8 gives an aerial view of Alcatraz’ home range with his potential hibernation spot circled in yellow, as can be seen it is highly encroached upon by the baseball complex and is located between the baseball fields and Denny Field in Intermittent Valley. Figure 9 depicts the topographical map used throughout the study to chart Alcatraz’ movements and the surrounding terrain to give a better idea of what his home range might be with a key below it. Figure 10 shows the data, up to this point, that has been recorded on the turtles whose home ranges were probably obstructed by the construction and Figure 11 shows the frequency of turtle captures in this area encompassing Intermittent and Rainy Day valleys before construction and after, as can be seen there is a significant decrease after the construction began in 2009.

    Discussion:
    In the years following the construction of the baseball field the data shows a decrease in turtle population in the area surrounding the construction site. Several scientific reports support these findings; for example, a report published by researchers in Florida called “The Influence of Disturbance Events on the Survival and Dispersal Rates of Box Turtles” reports a decline in the turtle populations following a human disturbance to an ecosystem that fragmented habitat. Figure 11 that shows the number of turtles captured in the two years before the construction of the baseball field is 55% higher than the number of turtles captured following the construction of the fields. Not to mention 12 of the 21 turtles that were at one point captured before the construction of the field were never seen again. In Nazdrowcz and Roth’s report, “ Population Ecology of the Eastern Box Turtle in a Fragmented Landscape,” their data supports the decline in population that follows the habitat destruction and fragmentation seen on Lovett’s campus, since they witnessed a similar occurrence in their study.
    (view changes)
    9:42 pm
  4. page Scientific Report edited ... Not Buried Buried 75 F 9/13 62 F 10/4 69 F 9/20 66 F 10/18 68 F 9/24 60 F 10…
    ...
    Not Buried
    Buried
    75 F 9/13
    62 F 10/4
    69 F 9/20
    66 F 10/18
    68 F 9/24
    60 F 10/26
    74 F 9/27
    58 F 11/8
    65 F 10/12
    64 F 11/21
    Maps:
    Figure 8
    (view changes)
    9:40 pm

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