Hindle, Tobin

Reefs off the coast of Florida face threats from stressors associated with climate change which leads to phase shifts. Under rapid climate change, a clear understanding of how reefs and their benthic organisms respond is still lacking and needs to be investigated. Using in situ imagery, a sponge cell model, and long-term benthic biota surveys, the effects of climate change on reef dynamics were explored in this dissertation project. Results from the in situ imagery found that differences in spectral signatures are found between functional groups (i.e., corals, sponges, and algae) and different species from substrate. Results based on a sponge cell model and transcriptomics data have found a resilience of these sponges to the predicted thermal extremes. Results from benthic biota surveys suggested that depth and light attenuation have the largest influence on the predicted distribution of corals, sponges, and algae at Pulley Ridge. Climate change has been impacting reef benthic biota starting at the organismal scale up to the reef scale. This research demonstrates the importance of monitoring reefs at a finer scale and determining the thresholds and limits of benthic biota to projected thermal extremes to better inform resource managers to preserve these irreplaceable ecosystems.

The nursery effect is a process where juvenile fish utilize coastal habitats to help them survive before moving to their adult habitat. This process establishes an important link between marine ecosystems. This study examines the nursery effect and nursery habitat utilization in the Indian River Lagoon and Florida Bay systems, and the coral reefs adjacent to them. Quantitative and spatial techniques were utilized to identify patterns of presence and abundance and the size structure of select fish species. Spatial analyses were also used to investigate distribution patterns.
Findings from this study suggest that several species utilize to a high degree the Indian River Lagoon and Florida Bay as nurseries. Furthermore, the abundance of adults on coral reefs is strongly connected to the presence of nurseries. This study has implications in fisheries management such as locating where juveniles of species develop. With such knowledge, better management plans could be implemented to ensure healthy fish stocks.

A spatial analysis of vegetation community changes over time at the Arthur R. Marshall National
Loxahatchee Wildlife Refuge will be conducted in order to identify relationships with variations in water
level and water quality. The analysis will use existing current and historical data in the refuge, including
water gages, vegetation surveys, fire burn data, Lidar based digital elevation data and aerial
photography acquired from the United States Fish and Wildlife Service, Everglades Depth Estimation
Network EDEN, South Florida Water Management District and other sources. Understanding how
vegetation boundaries and dominant species shift over time in response to water level changes and
other hydrological factors will allow the National Wildlife Refuge, and other scientists, to create more
responsive conservation and maintenance plans for the wetland refuge.

FAU's Office of Undergraduate Research and Inquiry hosts an annual symposium where students engaged in undergraduate research may present their findings either through a poster presentation or an oral presentation.

Global climate change stressors downscale to specific local vulnerabilities, thus requiring tailored adaptation strategies. Southeast Florida is uniquely vulnerable in terms of exposure to sea level rise due to low-lying porous limestone geology, high-valued coastal properties, treasured ecosystems, and dense populations at risk. Coastal populations are particularly at risk due to erosion, inundation and storm surge, but interior populations are also susceptible to rising water tables and extended periods of inundation amplified by SLR. Robust SLR adaptation options require significant economic costs that people may not be willing to pay for if they do not understand their real risk. If perceived risk does not adequately line up with actual risk, the necessary strategies may not be implemented.
<br>This study aims to compare perceived risk to actual risk to sea level rise in Broward County, FL. Perceived risk of residents, measured via an online survey, was layered over actual risk in terms of flooding, storm surge, and loss of property. Using GIS, a coastal vulnerability index was constructed for the actual risk, and principal component analysis identified the key factors influencing perceived risk. Results show where risk is underestimated, realistic, or overestimated, quantified both spatially and demographically. The concerns of residents are misaligned with the true vulnerability on many impacts, while others were very accurately understood. There are many opportunities for resilience that require preparation and adaptation. The first step to solving a problem is acknowledging that it exists. Where should outreach be targeted for increasing awareness?

Global climate change stressors downscale to specific local vulnerabilities,
requiring customized adaptation strategies. Southeast Florida has a high likelihood of sealevel rise impact to due to the low-lying porous limestone geology. High risk is coupled with high exposure due to high-valued coastal properties, productive ecosystems, and dense populations. Coastal populations are particularly at risk due to erosion, inundation and storm surge, but interior populations are also susceptible to rising water tables and extended periods of inundation. All of these impacts are amplified by sea-level rise. Robust sea-level rise adaptation options require significant economic costs. If perceived risk does not adequately line up with actual risk, lack of funds and preparation will prevent implementation of the most effective strategies.

This thesis aims to facilitate the siting and implementation of Florida Atlantic
University Southeast National Marine Renewable Energy Center (FAU SNMREC)
ocean current energy (OCE) projects offshore southeastern Florida through the analysis
of benthic anchoring conditions. Specifically, a suitability analysis considering all
presently available biologic and geologic datasets within the legal framework of OCE
policy and regulation was done. OCE related literature sources were consulted to assign suitability levels to each dataset, ArcGIS interpolations generated seafloor substrate maps, and existing submarine cable pathways were considered for OCE power cables. The finalized suitability map highlights the eastern study area as most suitable for OCE siting due to its abundance of sand/sediment substrate, existing underwater cable route access, and minimal biologic presence. Higher resolution datasets are necessary to locate specific OCE development locales, better understand their benthic conditions, and minimize potentially negative OCE environmental impacts.

Water Pollution is a serious issue in South Florida’s coastal waters with runoff being a major concern. Fertilizers are washed off lawns and golf courses and into storm drains and dumped into the intracoastal waters. This runoff causes change in water chemistry due to the high level of nutrients. This research examines the relationship between feeder canals and nutrient levels in South Florida’s intracoastal waterways. Water samples will be collected from two sites, one with many feeder canals and one with no feeder canals. Nutrient levels from these sites will be measured at three different tide levels, high tide, low tide and slack tide. A comparison of the results between sites and type of tide will be done to determine if the presence of feeder canals influences the levels of nutrients in the surrounding intracoastal waters.

Aerial photo-interpretation, GIS analysis, and groundwater modeling were employed to determine the impact of permitted groundwater withdrawal, primarily for agricultural irrigation, on protected wetland communities within Jonathan Dickinson State Park (JDSP), Martin County Florida. Since 1952, much of the wetland habitat has succeeded to terrestrial pine flatwoods in the southwestern section of the wilderness preserve of JDSP. The drying trend can not be linked to natural hydrologic impact, but strongly correlates to groundwater drawdown calculated using a three-dimensional groundwater computer model.