Table 1.
Generalized linear mixed models.
Fig 1.
Average monthly water depth and precipitation in pine flatwoods wetlands on Eglin AFB in northwest Florida.
Average monthly water depth of 17 pine flatwoods wetlands (used for breeding by Ambystoma bishopi) from 2005–2014 versus the average monthly precipitation over the same time period.
Fig 2.
Hydroperiods in pine flatwoods wetlands on Eglin AFB in northwest Florida.
Measured hydroperiods from 2007–2012 for 17 pine flatwoods wetlands used by Ambystoma bishopi for breeding. Depth measurements used to calculate hydroperiods were recorded at an approximate center point in each wetland. Years are arranged from September–August, and vertical gray lines separate years.
Table 2.
Filling and drying dates for pine flatwoods wetlands on Eglin AFB in northwest Florida.
Table 3.
Principal component analysis of temperature variables.
Table 4.
Parameter estimates for the best-approximating model.
Fig 3.
Historical hydroperiods modeled in pine flatwoods wetlands.
Estimated hydroperiods (November–May) from 1896–2014 for two pine flatwoods wetlands (wetland E and O), on Eglin AFB, Florida, used for breeding by Ambystoma bishopi based on generalized linear mixed model predictions of wetland conditions. Change points in average hydroperiod occurred around 1970 and 1999. Change points are indicated by lines above the graph, and the average hydroperiod between each change point is indicated along these lines. The horizontal black line represents the hydroperiod below which A. bishopi cannot successfully reproduce.
Fig 4.
Suitability of hydroperiods for flatwoods salamander reproduction.
Percentage of years from 1896–2014 in which the hydroperiod of 17 pine flatwoods wetlands was likely insufficient for Ambystoma bishopi reproduction based on larval development times of between 3 and 5 months. Each bar represents a different breeding wetland arranged in order of increasing wetted area.
Table 5.
Results of change-point analysis on wetland hydroperiods.