Multiscale Physical and Biological Dynamics in the Philippine Archipelago: Predictions and Processes

Lermusiaux, Pierre F. J.; Haley, Patrick J.; Leslie, Wayne G.; Agarwal, Amit; Logutov, Oleg G.; Burton, Lisa

doi:10.5670/oceanog.2011.05

Cited by 52 publications

(30 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The range sizes found in this study are unseen for marine benthic species, and are reminiscent of distribution patterns in terrestrial organisms where examples of intra-archipelagic endemism abound [24,25]. These results are even more interesting in view of a high physical connectivity between islands and basins [45,46], which would intuitively facilitate dispersal of marine organisms, resulting in much larger species distributions.…”

Section: (A) High Levels Of Cryptic Species Diversitymentioning

confidence: 71%

Extensive cryptic species diversity and fine-scale endemism in the marine red alga Portieria in the Philippines

et al. 2013

View full text Add to dashboard Cite

We investigated species diversity and distribution patterns of the marine red alga Portieria in the Philippine archipelago. Species boundaries were tested based on mitochondrial, plastid and nuclear encoded loci, using a general mixed Yule-coalescent (GMYC) model-based approach and a Bayesian multilocus species delimitation method. The outcome of the GMYC analysis of the mitochondrial encoded cox2-3 dataset was highly congruent with the multilocus analysis. In stark contrast with the current morphology-based assumption that the genus includes a single, widely distributed species in the Indo-West Pacific (Portieria hornemannii), DNA-based species delimitation resulted in the recognition of 21 species within the Philippines. Species distributions were found to be highly structured with most species restricted to island groups within the archipelago. These extremely narrow species ranges and high levels of intra-archipelagic endemism contrast with the wide-held belief that marine organisms generally have large geographical ranges and that endemism is at most restricted to the archipelagic level. Our results indicate that speciation in the marine environment may occur at spatial scales smaller than 100 km, comparable with some terrestrial systems. Our finding of fine-scale endemism has important consequences for marine conservation and management.

show abstract

Section: (A) High Levels Of Cryptic Species Diversitymentioning

confidence: 71%

Extensive cryptic species diversity and fine-scale endemism in the marine red alga Portieria in the Philippines

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Other MSEAS subsystems include: initialization schemes, nested dataassimilative tidal prediction; fast-marching coastal objective analysis ; stochastic sub-grid-scale models; data assimilation, optimization and adaptive sampling; dynamically-orthogonalequation for uncertainty predictions; non-Gaussian assimilation using Gaussian Mixture Models; machine learning of model structures and functions; and Lagrangian Coherent Structures. MSEAS has been used for multiple focused scientific studies in shelfbreak regions [4,23,[25][26][27][28][29][30]]. …”

Section: B Data-driven Dynamical Oceanographic Modelmentioning

confidence: 99%

Time-evolving acoustic propagation modeling in a complex ocean environment

Colin

Duda

Raa

et al. 2013

2013 MTS/IEEE OCEANS - Bergen

View full text Add to dashboard Cite

Abstract-During naval operations, sonar performance estimates often need to be computed in-situ with limited environmental information. This calls for the use of fast acoustic propagation models. Many naval operations are carried out in challenging and dynamic environments. This makes acoustic propagation and sonar performance behavior particularly complex and variable, and complicates prediction. Using data from a field experiment, we have investigated the accuracy with which acoustic propagation loss (PL) can be predicted, using only limited modeling capabilities. Environmental input parameters came from various sources that may be available in a typical naval operation.The outer continental shelf shallow-water experimental area featured internal tides, packets of nonlinear internal waves, and a meandering water mass front. For a moored source/receiver pair separated by 19.6 km, the acoustic propagation loss for 800 Hz pulses was computed using the peak amplitude. The variations in sound speed translated into considerable PL variability of order 15 dB. Acoustic loss modeling was carried out using a data-driven regional ocean model as well as measured sound speed profile data for comparison. The acoustic model used a two-dimensional parabolic approximation (vertical and radial outward wavenumbers only). The variance of modeled propagation loss was less than that measured. The effect of the internal tides and sub-tidal features was reasonably well modeled; these made use of measured sound speed data. The effects of nonlinear waves were not well modeled, consistent with their known three-dimensional effects but also with the lack of measurements to initialize and constrain them.

show abstract

“…At this point, the simulation can be performed. At the end of the simulation, the GUI allows the Before describing the oil spill model (Section 2.2), we note that downscaling and nesting of different regional models has been successfully completed before (e.g., Onken et al 2005;Ramp et al 2011, andLermusiaux et al 2011). In Onken et al (2005), a degradation of the interior solution has been reported for long runs.…”

Section: Irenom-interactive Relocatable Nested Ocean Modelmentioning

confidence: 99%

A relocatable ocean model in support of environmental emergencies

et al. 2014

View full text Add to dashboard Cite

During the Costa Concordia emergency case, regional, subregional, and relocatable ocean models have been used together with the oil spill model, MEDSLIK-II, to provide ocean currents forecasts, possible oil spill scenarios, and drifters trajectories simulations. The models results together with the evaluation of their performances are presented in this paper. In particular, we focused this work on the implementation of the Interactive RElo- Concordia emergency and on its validation using drifters released in the area of the accident. It is shown that thanks to the capability of improving easily and quickly its configuration, the IRENOM results are of greater accuracy than the results achieved using regional or subregional model products. The model topography, the initialization procedures, and the horizontal resolution are the key model settings to be configured. Furthermore, the IRENOM currents and the MEDSLIK-II simulated trajectories showed to be sensitive to the spatial resolution of the meteorological fields used, providing higher prediction skills with higher resolution wind forcing.

show abstract

Multiscale Physical and Biological Dynamics in the Philippine Archipelago: Predictions and Processes

Cited by 52 publications

References 20 publications

Extensive cryptic species diversity and fine-scale endemism in the marine red alga Portieria in the Philippines

Extensive cryptic species diversity and fine-scale endemism in the marine red alga Portieria in the Philippines

Time-evolving acoustic propagation modeling in a complex ocean environment

A relocatable ocean model in support of environmental emergencies

Contact Info

Product

Resources

About