|2015 - Present||Department Chair, Marine and Environmental Sciences, Nova Southeastern University ‐ Halmos College of Arts and Sciences -- Department of Marine and Environmental Science|
|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|
Experimental evidence of minimal effects on octocoral hosts caused by the introduced ophiuroid Ophiothela mirabilis Coral Reefs (2021)
Highly abundant and widespread populations of the introduced eastern Pacific ophiuroid brittle star Opthiothela mirabilis occur in southeast Florida, extending the range of this new non-native species from southern Brazil northward to the Caribbean Sea ...
Measured and Predicted Acute Toxicity of Phenanthrene and MC252 Crude Oil to Vertically Migrating Deep-Sea Crustaceans Environmental Science and Pollution Research (2020)
Deep-water column micronekton play a key role in oceanic food webs and represent an important trophic link between deep- and shallow-water ecosystems. Thus, the potential impacts of sub-surface hydrocarbon plumes on these organisms are critical ...
Contrasting shifts in coral assemblages with increasing disturbances Coral Reefs (2020)
Increasing incidence of major disturbances is contributing to extensive and widespread coral loss, thereby undermining the biodiversity, structure and function of reef ecosystems. The composition of coral assemblages is already changing due to selective effects ...
Insights from extreme coral reefs in a changing world Coral Reefs (2020)
Coral reefs are one of the most biodiverse and economically important ecosystems in the world, but they are rapidly degrading due to the effects of global climate change and local anthropogenic stressors. Reef scientists are ...
Agent-based model of Eastern Pacific damselfish and sea urchin interactions shows increased coral reef erosion under post-ENSO conditions Ecological Modelling (2020)
Significant increases in the population of the echinoid bioeroder Diadema mexicanum that may soon follow severe El Niño events, such as in 1982–1983, can have a significant negative impact on the carbonate budget of coral ...
7700-Year Persistence of an Isolated, Free-Living Coral Assemblage in the Galapagos Islands: A Model for Coral Refugia? Coral Reefs (2020)
In an eastern-Pacific coral assemblage at Devil’s Crown, Galápagos Islands, Ecuador, two coral species, Psammocora stellata and Cycloseris (Diaseris) distorta, form dense populations of unattached colonies on sand and rubble substrata. In the Galápagos, living ...
Urgent need for coral demography in a world where corals are disappearing Marine Ecology Progress Series (2020)
Coral reefs have long attracted attention because of their biological and economic importance, but this interest now has turned to examining the possibility of functional extirpation. Widespread declines in coral abundances have fueled the shift ...
A Revised Holocene Coral Sea-Level Database from the Florida Reef Tract, USA PeerJ (2020)
The coral reefs and mangrove habitats of the south Florida region have long been used in sea-level studies for the western Atlantic because of their broad geographic extent and composition of sea-level tracking biota. The ...
Benthic ctenophore (Order Platyctenida) reproduction, recruitment, and seasonality in south Florida Invertebrate Biology (2019)
Reproductive structures, modes, and seasonal patterns of size–class abundances are examined in two benthic platyctene (Family Coeloplanidae) ctenophore species present in dissimilar shallow marine environments in subtropical southeast Florida. Coeloplana waltoni, a minute (1–3 mm ...
Heat Attenuation and Nutrient Delivery by Localized Upwelling Avoided Coral Bleaching Mortality in Northern Galapagos During 2015/2016 ENSO Coral Reefs (2019)
Despite a very strong El Niño Southern Oscillation in 2015/2016, no coral mortality associated with bleaching was observed at the northern Galapagos (Ecuador) Islands of Darwin and Wolf. From March 2016 to March 2018, coral ...
Some Environmental and Biological Determinants of Coral Richness, Resilience and Reef Building in Galápagos (Ecuador) Scientific Reports (2019)
Throughout the Galápagos, differences in coral reef development and coral population dynamics were evaluated by monitoring populations from 2000–2019, and environmental parameters (sea temperatures, pH, NO3−, PO43−) from 2015–19. The chief goal was to explain ...
Shallow-water Benthic Foraminifera of the Galápagos Archipelago: Ecologically Sensitive Carbonate Producers in an Atypical Tropical Oceanographic Setting Journal of Foraminiferal Research (2019)
Coral reefs are currently exposed to a number of anthropogenic pressures worldwide. With ocean warming and acidification expected to continue in the near future, it is important to study coral environments within natural oceanographic gradients, ...
Thresholds and Drivers of Coral Calcification Responses to Climate Change Global Change Biology (2018)
Increased temperature and CO2 levels are considered key drivers of coral reef degradation. However, individual assessments of ecological responses (calcification) to these stressors are often contradicting. To detect underlying drivers of heterogeneity in coral calcification ...
State of Corals and Coral Reefs of the Galapagos Islands (Ecuador): Past, Present, and Future Marine Pollution Bulletin (2018)
Coral populations and structural coral reefs have undergone severe reductions and losses respectively over large parts of the Galápagos Islands during and following the 1982–83 El Niño event. Coral tissue loss amounted to 95% across ...
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 ...
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 ...
El Niño, echinoid bioerosion and recovery potential of an isolated Galápagos coral reef: a modeling perspective Marine Biology (2017)
Wellington Reef is the northern-most and largest known coral reef in the Galápagos Islands. This study explores the recovery potential of the Wellington Reef when subjected to predicted future El Niño Southern Oscillation warming events ...
Comparison of coral diversity between big and small atolls: a case study of Yongle atoll and Lingyang reef, Xisha Islands, central of South China Sea Biodiversity and Conservation (2017)
The South China Sea (SCS) includes large areas of extensive coral reef development but its reefs are still poorly known. Yongle atoll is the biggest typical atoll in the Xisha Islands, central of SCS. Lingyang ...
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. ...