Table of Contents

• Dataset Description
  • Data Processing Description
• Data Files
• Related Publications
• Parameters
• Deployments
• Project Information
• Funding

From http://northweb.hpl.umces.edu/LTRANS.htm

beta-LTRANS-ADCIRC is based on the Larval TRANSport Lagrangian model (LTRANS v.2b), an off-line particle-tracking model that runs with the stored predictions of a 3D hydrodynamic model. In this case, LTRANS v.2b has been substantially modified to be able to run with the finite-element circulation predictions of ADCIRC. Although LTRANS was built to simulate oyster larvae, it can easily be adapted to simulate passive particles and other planktonic organisms. LTRANS v.2 is written in Fortran 90 and is designed to track the trajectories of particles in three dimensions. It includes a 4th order Runge-Kutta scheme for particle advection and a random displacement model for vertical turbulent particle motion. Reflective boundary conditions, larval behavior, and settlement routines are also included. A brief description of the beta-LTRANS-ADCIRC particle-tracking model can be found here (68 KB .pdf). For more information on LTRANS, please see the LTRANS web page. and the application of LTRANS to oyster larvae transport, see a summary web page with animations, the publications North et al. (2008, 2011), and the LTRANS v.2 User's Guide. Please cite North et al. (2011) when referring to LTRANS v.2b. The updates that were made for LTRANS v.2b are listed here.

Elizabeth North of University of Maryland Center for Environmental Science Horn Point Laboratory implemented beta-LTRANS-ADCIRC. Funding was provided by the National Science Foundation Biological Oceanography Program. Steven Suttles and Jason Spires provided valuable assistance.

beta-LTRANS-ADCIRC Code: beta-LTRANS-ADCIRC Open Source Code. We would appreciate knowing who is using LTRANS. If you would like to share this information with us, please send us your name, contact information, and a brief description of how you plan to use this model to enorth@umces.edu with 'LTRANS-ADCIRC' in the subject line.

Access restrictions: This software is open-source and licensed as stated by MIT/X License, but utilizes external dependencies and program which have different restrictions. Please see the beta-LTRANS-ADCIRC license file and website for more information.

PDF of original beta-LTRANS-ADCIRC webpage: http://dmoserv3.bco-dmo.org/data_docs/EstuarineMetaDyn/betaLTRANS-ADCIRC...

Code:

External Dependencies and Programs. beta-LTRANS-ADCIRC requires NetCDF libraries and uses the following programs to calculate random numbers (Mersenne Twister) and fit tension splines (TSPACK). Because beta-LTRANS-ADCIRC reads-in ADCIRC-generated NetCDF (.nc) files, it requires that the appropriate NetCDF libraries be installed on your computer (see files and links below). Also, please note that although the Mersenne Twister and TSPACK programs are included in the beta-LTRANS-ADCIRC in the Random_module.f90 and Tension_module.f90, respectively, they do not share the same license file as beta-LTRANS-ADCIRC Please review and respect their permissions (links and instructions provided below).

LTRANS User's Guide and beta-LTRANS-ADCIRC Description (see Related Publicatsion section):
Please send comments or suggestions regarding the User's Guide to enorth@umces.edu. They will be posted on the list of known LTRANS v.2 bugs and solutions (northweb.hpl.umces.edu/LTRANS/LTRANS-v2b/LTRANSv2b%20bugs%20and%20solutions.txt)

BCO-DMO Processing:
- Files were downloaded from PI's site to BCO-DMO
- File names were slightly changed to include PI's file directory
- Links on dataset page are to locally residing files

Description from NSF award abstract:
The PIs will use the eastern oyster (Crassostrea virginica) in Pamlico Sound, North Carolina, as a model system and will attempt to optimize the design of networks of no-take reserves as a strategy for maintaining metapopulations of this commercially harvested species. The project specifically recognizes that network persistence depends on (1) the potential for growth, survival, and reproduction within reserves, and (2) the potential to distribute offspring among reserves. Thus, demographic processes within reserves and settling areas play important roles, along with variability of physical transport. The PIs plan to:
(1) test and refine 3D bio-physical models of connectivity due to oyster larval transport in a shallow, wind-dominated system;
(2) test, refine, and apply technology to detect natal origins of larvae using geochemical tags in larval shell; and
(3) integrate regional connectivity and demographic rates to model metapopulation dynamics.

This study will produce new tools and test and refine others used for studying larval connectivity, a fundamentally important process in the maintenance of natural populations, and thus in biological conservation and resource management. The tools include a hydrodynamic modeling tool coupled with an open-source particle tracking model that will be available on-line with computer code and user guide. The project will use integrated modeling approaches to evaluate the design of reserve networks: results will be directly useful to improving oyster and ecosystem-based management in Pamlico Sound, and the methods will inform approaches to network design in other locations.