|2015 - Present||Department Chair, Marine and Environmental Sciences, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2008 - Present||Professor, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2003 - Present||Associate Director - National Coral Reef Institute, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2003 - 2008||Associate Director - National Coral Reef Institute, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2003 - 2008||Associate Professor, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2000 - 2003||Research Scientist - National Coral Reef Institute, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography|
|2000||Habilitation - Actuopalaeontology, Karl-Franzens-Universitat Graz|
|1993||PhD Zoology, University of Cape Town|
|1989||M.Sc - Biology, University of Vienna|
|1975 - 1983||Bundesgymnasium Wien 8 Piaristen|
Population Collapse Dynamics in Acropora downingi, an Arabian/Persian Gulf Ecosystem‐Engineering Coral, Linked to Rising Temperature Global Change Biology (2018)
As in the tropical Atlantic, Acropora populations in the southern Persian/Arabian Gulf plummeted within two decades after having been ecosystem engineers on most wave‐exposed reefs since the Pleistocene. Since 1996/1998 live coral cover in the ...
Community Structure of Shallow Water Alcyonacea (Anthozoa: Octocorallia) from the Southern Tropical Eastern Pacific Ecological Research (2018)
Alcyonacea are sessile invertebrates, which can significantly shape the boundary layer in coral reefs and rocky habitats. Ecological aspects in this taxon have been well studied in the Caribbean, Mediterranean, and Indo-Pacific. With few recent ...
Bleaching Events Regulate Shifts from Corals to Excavating Sponges in Algae-Dominated Reefs Global Change Biology (2017)
Changes in coral–sponge interactions can alter reef accretion/erosion balance and are important to predict trends on current algal-dominated Caribbean reefs. Although sponge abundance is increasing on some coral reefs, we lack information on how shifts ...
Short-Term Toxicity of 1-Methylnaphthalene to Americamysis bahia and 5 Deep-Sea Crustaceans Environmental Toxicology and Chemistry (2017)
There are few studies that have evaluated hydrocarbon toxicity to vertically migrating deep-sea micronekton. Crustaceans were collected alive using a 9-m2 Tucker trawl with a thermally insulated cod end and returned to the laboratory in ...
Complex Interplay between Depositional and Petrophysical Environments in Holocene Tidal Carbonates (Al Ruwais, Qatar) Sedimentology (2017)
Carbonate rocks can be classified in terms of those properties relating to the pore system of lithified sediments, so-called ‘petrophysical rock types’, or ‘depositional rock types’ which are categorized based on characteristics directly reflecting their ...
Terrigenous Sediment-Dominated Reef Platform Infilling: An Unexpected Precursor to Reef Island Formation and a Test of the Reef Platform Size–Island Age Model in the Pacific Coral Reefs (2017)
Low-lying coral reef islands are considered highly vulnerable to climate change, necessitating an improved understanding of when and why they form, and how the timing of formation varies within and among regions. Several testable models ...
Effects of Water Flow on Intra- and Intercolonial Variability in Bleaching of the Zoanthid, Palythoa caribaeorum Journal of Experimental Marine Biology and Ecology (2017)
The zoanthid, Palythoa caribaeorum, is a good indicator of coral bleaching because it is highly susceptible to bleaching under physiological stresses. We show that water flow accounts for variation in thermal bleaching sensitivity of P. ...
Acute and Sub-Acute Toxicity of the Polycyclic Aromatic Hydrocarbon 1-Methylnaphthalene to the Shallow-Water Coral Porites divaricata: Application of a Novel Exposure Protocol Environmental Toxicology and Chemistry (2017)
Previous research evaluating hydrocarbon toxicity to corals and coral reefs has generally focused on community-level effects, and results often are not comparable between studies because of variability in hydrocarbon exposure characterization and evaluation of coral ...
Model Suggests Potential for Porites Coral Population Recovery After Removal of Anthropogenic Disturbance (Luhuitou, Hainan, South China Sea) Scientific Reports (2016)
Population models are important for resource management and can inform about potential trajectories useful for planning purposes, even with incomplete monitoring data. From size frequency data on Luhuitou fringing reef, Hainan, South China Sea, a ...
The Coral Communities of Yongle Atoll: Status, Threats, and Conservation Significance for Coral Reefs in South China Sea Marine and Freshwater Research (2016)
Xisha Islands are in the central South China Sea and form one of the four large island groups in this region. They include more than 40 islands, reefs and cays, and have considerable ecological and ...
Coral Population Dynamics Across Consecutive Mass Mortality Events Global Change Biology (2015)
Annual coral mortality events due to increased atmospheric heat may occur regularly from the middle of the century and are considered apocalyptic for coral reefs. In the Arabian/Persian Gulf, this situation has already occurred and ...
Coral Reef Recovery in the Galapagos Islands: The Northernmost Islands (Darwin and Wenman) Coral Reefs (2015)
The remote northernmost Galápagos Islands, Darwin and Wenman, exhibited well-developed coral communities in 1975, which were severely degraded during the 1982–1983 El Niño warming event. Mapping of the coral reef at Darwin, herein Wellington Reef, ...
Water Column Productivity and Temperature Predict Coral Reef Regeneration Across the Indo-Pacific Scientific Reports (2015)
Predicted increases in seawater temperatures accelerate coral reef decline due to mortality by heat-driven coral bleaching. Alteration of the natural nutrient environment of reef corals reduces tolerance of corals to heat and light stress and ...
Accretion History of Mid-Holocene Coral Reefs from the Southeast Florida Continental Reef Tract, USA Coral Reefs (2014)
Sixteen new coral reef cores were collected to better understand the accretion history and composition of submerged relict reefs offshore of continental southeast (SE) Florida. Coral radiometric ages from three sites on the shallow inner ...
Large-Scale Carbonate Platform Development of Cay Sal Bank, Bahamas, and Implications for Associated Reef Geomorphology Geomorphology (2014)
The Bahama Archipelago consists of an arcuate chain of carbonate platforms. Average water depths on the platform-tops, such as the Great Bahama Bank (GBB), are typically 10 m or less, with coral reef-rimmed margins, thick ...
A Discrete Mathematical Extension of Conceptual Ecological Models - Application for the SE Florida Shelf Ecological Indicators (2014)
Conceptual ecological models (CEM) respond to the need for improved management of natural resources due to increasing scale and severity of human impacts. CEMs, like the EBM-DPSER framework, serve as non-quantitative planning tools identifying stressors ...
Percent Recent Mortality (PRM) of Stony Corals as an Ecological Indicator of Coral Reef Condition Ecological Indicators (2014)
The reef communities of the Florida coral reef tract play a major role in supporting the regional economy but are threatened by increased exploitation and environmental factors. Coral reef ecosystem services are vital to the ...
Corals from the Persian/Arabian Gulf as Models for Thermotolerant Reef-Builders: Prevalence of Clade C3 Symbiodinium, Host Fluorescence and Ex Situ Temperature Tolerance Marine Pollution Bulletin (2013)
Corals in the Arabian/Persian Gulf endure summer temperatures of up to 36 °C, making them ideal subjects to study the mechanisms underlying thermal tolerance. Unexpectedly, we found the “generalist” Symbiodinium clade C3 to be the ...
Critical Research Needs for Identifying Future Changes in Gulf Coral Reef Ecosystems Marine Pollution Bulletin (2013)
Expert opinion was assessed to identify current knowledge gaps in determining future changes in Arabian/Persian Gulf (thereafter ‘Gulf’) coral reefs. Thirty-one participants submitted 71 research questions that were peer-assessed in terms of scientific importance (i.e., ...
Functional Composition of Chaetodon Butterflyfishes at a Peripheral and Extreme Coral Reef Location, the Persian Gulf Marine Pollution Bulletin (2013)
The functional composition of reef fish assemblages is highly conserved across large biogeographic areas, but it is unknown whether assembly rules hold at biogeographical and environmental extremes for coral reefs. This study examined the functional ...
Thermal Tolerances of Reef Corals in the Gulf: A Review of the Potential for Increasing Coral Survival and Adaptation to Climate Change Through Assisted Translocation Marine Pollution Bulletin (2013)
Corals in the Gulf withstand summer temperatures up to 10 °C higher than corals elsewhere and have recovered from extreme temperature events in 10 years or less. This heat-tolerance of Gulf corals has positive implications ...
Coral Population Trajectories, Increased Disturbance and Management Intervention: A Sensitivity Analysis Ecology and Evolution (2013)
Coral reefs distant from human population were sampled in the Red Sea and one-third showed degradation by predator outbreaks (crown-of-thorns-starfish = COTS observed in all regions in all years) or bleaching (1998, 2010). Models were ...