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Influence of urbanization on white-tailed deer fawn survival and cause-specific mortality
Toward Robust and Secure Federated Learning: Mitigating Heterogeneity and Adversarial Threats in Collaborative On-Device Optimization.
Bareroot vs. Containerized Stock Types: Shortleaf Pine Growth Comparison on a Planted Stand in Bahama, North Carolina
Shortleaf pine (Pinus echinata) is a native species of ecological and economic value, yet it has
declined across much of its historic range. This project examined the performance of bareroot
and containerized shortleaf pine seedlings after a prescribed burn at the Umstead Research
Station in Bahama, North Carolina. The goal was to evaluate the effects of seedling stock type
and a prescribed burn treatment on survival, diameter growth, and height growth after eight years
of growth. The working hypothesis was that there would be no statistically significant difference
in survival, and diameter and height growth between the two seedling stock types. Field data
were collected from 861 seedlings and statistically analyzed using Chi-square tests, Welch t-
tests, and two-way ANOVA with Tukey HSD post-hoc comparisons using R via RStudio
(2024.12.1 Build 563). While survival was slightly higher for bareroot seedlings (52%)
compared to containerized (47%), the difference was not statistically significant (p = 0.13).
However, survival was significantly higher for seedlings planted in burned plots than in
unburned plots (p < 0.001), with bareroot seedlings achieving 61% survival and containerized
seedlings 57% survival in burned areas. Bareroot seedlings also had a significantly larger mean
diameter (2.52 in) than containerized seedlings (2.37 in; p = 0.04). The prescribed burn had a
highly significant effect on both diameter and height (p < 0.001): burned seedlings exhibited
greater diameter and height regardless of seed stock type. No significant interaction was found
between seed stock type and burn status, indicating that burn effects were consistent across
seedling types