A5047999641- Marine and coastal plant biology
- Coral and Marine Ecosystems Studies
- Marine Biology and Ecology Research
- Marine and fisheries research
- Echinoderm biology and ecology
- Cephalopods and Marine Biology
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Geological and Tectonic Studies in Latin America
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Coastal and Marine Management
- Identification and Quantification in Food
- Turfgrass Adaptation and Management
- Reservoir Engineering and Simulation Methods
- Water Quality and Resources Studies
- Non-Destructive Testing Techniques
- Spacecraft and Cryogenic Technologies
- Innovations in Concrete and Construction Materials
- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Environmental and Ecological Studies
- Hydrology and Sediment Transport Processes
Universidad San Francisco de Quito
2016-2024
University of North Carolina at Chapel Hill
2021-2024
Greenland Government
2021
Brown University
2010-2012
John Brown University
2012
Charles Darwin Foundation
2009
Greenland National Museum & Archives
2007
Abstract Comparisons between historical and recent ecological datasets indicate that shallow reef habitats across the central Galapagos Archipelago underwent major transformation at time of severe 1982/1983 El Niño warming event. Heavily grazed reefs with crustose coralline algae (‘urchin barrens’) replaced former macroalgal coral habitats, resulting in large local regional declines biodiversity. Following threat assessment workshops, a total five mammals, six birds, reptiles, fishes, one...
Our understanding of how communities are regulated diminishes with increasing spatial scale. Because oceanographic processes supply food, transport propagules, and set abiotic conditions across broad areas, they may explain metacommunity food web functioning on large scales. Here we test for bottom‐up manifestations an process, upwelling, through production barnacle ( Megabalanus spp.) prey to top‐down control by whelks, fish, urchins a mesoscale (125 km) gradient 28–68% upwelling at 12...
Abstract DNA sequences were obtained from 32 blade-forming Ulva specimens collected in 2018 and 2019 four islands the Galápagos Archipelago: Fernandina, Floreana, Isabela San Cristóbal. The loci sequenced nuclear encoded ITS plastid rbc L tuf A, all recognized as barcode markers for green algae. Four species found, adhaerens , U. lactuca ohnoi tanneri of which have had their type sequenced, ensuring correct application these names. Only one these, was reported historically archipelago. most...
An important impact of global warming in nature is the decline ecological functions such as primary production, habitat provision, and carbon sequestration. These can be disrupted when species that perform them are impaired by anthropogenic or other stressors. Where there a diversity responses to among filling these roles, function more likely maintained despite loss least tolerant species. However, response key generally unknown, particularly for roles played predatory marine Here we show...
Theory and experiments indicate that changes in consumer diversity affect benthic community structure ecosystem functioning. Although the effects of have been tested laboratory field, little is known about subtidal zone, one largest marine habitats. We investigated grazing sea urchins on algal abundance a natural habitat Galápagos Islands. Three species (Eucidaris, Lytechinus, Tripneustes) were manipulated inclusion cages following replacement design with three levels richness (one, two,...
Abstract During a cold La Niña period (August 2007–January 2008) in the central Galápagos archipelago, 70% of Pocillopora branching corals were severely bleached across three long‐term monitoring sites, affording an opportunity to examine its impact on persistence these and their associated community fish mobile macroinvertebrates. Using time series empirical approach, we tagged tracked fate 96 coral heads associates. When surveyed July 2008, recovered live dead that previously supported...
A proposed subdivision of offshore West Greenland into four provinces is presented on the basis regional variations in geological development, especially during Cainozoic. The are from north to south: Baffin Bay, Disko West, Nuuk and Cape Farewell. In these provinces, play factors such as petroleum-charge system, reservoir-seal trap type must be viewed close relation two key processes: influence volcanic activity Palaeogene Cainozoic exhumation. Caution advised using analogues evaluations...
Threatened shark species are caught in large numbers by artisanal and commercial fisheries traded globally. Monitoring both which sold fisheries, the export of CITES-restricted products, essential reducing illegal fishing. Current methods for identification rely on visual examination experts or DNA barcoding techniques requiring specialist laboratory facilities trained personnel. The need equipment and/or input from means many markets currently not monitored. We have developed a paper-based...
Yellowfin tuna, Thunnus albacares , is an important global fishery and of particular importance in the Eastern Pacific Ocean (EPO). According to 2019 Inter-American Tropical Tuna Commission (IATTC) assessment, yellowfin tuna within EPO a single stock, being managed as one stock. However, previous studies indicate site fidelity, or limited home ranges, which suggests potential for multiple stocks EPO, was supported by population genetic study using microsatellites. If numerous are present,...
Salt marshes are frequently exposed to storm overwashes resulting in large deposits of sand and wrack at the margin high marsh dune communities. On Cape Cod, MA, these disturbance-generated areas dominated by burrows crab Uca pugilator nest entrances ants Formica subsericea Tetramorium caespitum. We mimicked effects through additions examined their on distributions biotic structures organisms. found that while crabs responded negatively deposition, did so positively. suggest soil temperature...
DNA sequencing of the plastid encoded rbcL gene supported by morpho-anatomical features reveals Gracilaria parva sp. nov. from Panama and Ecuador in tropical eastern Pacific Ocean. In phylogram, G. occurs a clade sister to western Atlantic species galatensis. Morphologically anatomically, is distinguished two similar, described species, brevis veleroae its small size, 2.5 cm tall with branch widths mostly <2 mm occasionally 4 mm, three cell layered cortex. are taller, have wider branches,...
During a cold La Niña period (August 2007-January 2008) in the central Galápagos archipelago, 70% of Pocillopora finger corals were bleached across three long-term monitoring sites, affording an opportunity to examine impact El Niño Southern Oscillation-related temperature anomalies on persistence these and their associated community fish mobile macroinvertebrates. Using time series empirical approach, we tagged tracked fate 96 coral heads associates. When surveyed July 2008, live...
We present the first official record of by-the-wind-sailor ( Velella velella ) for Ecuador. Twelve individuals were found along different beaches San Cristóbal and Santa Cruz Islands in Galápagos Archipelago, These sightings may be influenced by El Niño Southern Oscillation events.
Increased standing macroalgal biomass in upwelling zones is generally assumed to be the result of higher nutrient flux due upwelled waters. However, other factors can strongly impact communities. For example, herbivory and temperature, via their effects on primary producers metabolic demands consumers, also influence productivity, respectively. We assessed availability, a subtidal nearshore rocky reef Galápagos Islands. manipulated availability field experiments performed two seasons: first...