|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|
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 ...
Variation in the Size Structure of Corals is Related to Environmental Extremes in the Persian Gulf Marine Environmental Research (2013)
The size structure of coral populations is the culmination of key demographic events, including recruitment, mortality and growth, thereby providing important insights to recent ecological dynamics. Importantly, the size structure of corals reflects both intrinsic ...
Environmental Impacts of Dredging and Other Sediment Disturbances on Corals: A Review Marine Pollution Bulletin (2012)
A review of published literature on the sensitivity of corals to turbidity and sedimentation is presented, with an emphasis on the effects of dredging. The risks and severity of impact from dredging (and other sediment ...
Human Impact on Atolls Leads to Coral Loss and Community Homogenisation: A Modeling Study PLoS One (2012)
We explore impacts on pristine atolls subjected to anthropogenic near-field (human habitation) and far-field (climate and environmental change) pressure. Using literature data of human impacts on reefs, we parameterize forecast models to evaluate trajectories in ...
Satellite Imaging Coral Reef Resilience at Regional Scale. A Case-Study From Saudi Arabia Marine Pollution Bulletin (2012)
We propose a framework for spatially estimating a proxy for coral reef resilience using remote sensing. Data spanning large areas of coral reef habitat were obtained using the commercial QuickBird satellite, and freely available imagery ...
Red Sea Coral Reef Trajectories Over 2 Decades Suggest Increasing Community Homogenization and Decline in Coral Size PLoS One (2012)
Three independent line intercept transect surveys on northern Red Sea reef slopes conducted in 1988/9 and 1997/8 in Egypt and from 2006–9 in Saudi Arabia were used to compare community patterns and coral size. Coral ...
Reefs and Islands of the Chagos Archipelago, Indian Ocean: Why It Is the World's Largest No-Take Marine Protected Area Aquatic Conservation: Marine and Freshwater Ecosystems (2012)
The Chagos Archipelago was designated a no-take marine protected area (MPA) in 2010; it covers 550 000 km2, with more than 60 000 km2 shallow limestone platform and reefs. This has doubled the global cover ...
Implications of Reef Ecosystem Change for the Stability and Maintenance of Coral Reef Islands Global Change Biology (2011)
Coral reef islands are among the most vulnerable environments on Earth to climate change because they are low lying and largely constructed from unconsolidated sediments that can be readily reworked by waves and currents. These ...
Present Limits to Heat-Adaptability in Corals and Population-Level Responses to Climate Extremes PLoS One (2011)
Climate change scenarios suggest an increase in tropical ocean temperature by 1–3°C by 2099, potentially killing many coral reefs. But Arabian/Persian Gulf corals already exist in this future thermal environment predicted for most tropical reefs ...
The Most Temperature-Adapted Corals Have an Achilles' Heel Marine Pollution Bulletin (2011)
The corals of the Persian/Arabian Gulf are better adapted to temperature fluctuations than elsewhere in the Indo-Pacific. The Gulf is an extreme marine environment displaying the highest known summer water temperatures for any reef area. ...
Detecting End-Member Structural and Biological Elements of a Coral Reef Using a Single-Beam Acoustic Ground Discrimination System International Journal of Remote Sensing (2011)
A thematic map of benthic habitat was produced for a coral reef in the Republic of Palau, utilizing hydroacoustic data acquired with a BioSonics DT-X echosounder and a single-beam 418 kHz digital transducer. This article ...
Crucial Knowledge Gaps in Current Understanding of Climate Change Impacts on Coral Reef Fishes Journal of Experimental Biology (2010)
Expert opinion was canvassed to identify crucial knowledge gaps in current understanding of climate change impacts on coral reef fishes. Scientists that had published three or more papers on the effects of climate and environmental ...