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ATLAS Deliverable 1.6: Biologically realistic Lagrangian dispersal and connectivity

Fox, Alan; Gary, Stefan; Biastoch, Arne; Roberts, J Murray


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{
  "publisher": "Zenodo", 
  "DOI": "10.5281/zenodo.3548735", 
  "title": "ATLAS Deliverable 1.6: Biologically realistic Lagrangian dispersal and connectivity", 
  "issued": {
    "date-parts": [
      [
        2019, 
        11, 
        20
      ]
    ]
  }, 
  "abstract": "<p>Larval behaviours are predicted to impact their long-term spreading, with<br>\nwider spreading being everywhere associated with more time spent higher in<br>\nthe water column.<br>\nThe strength of this enhanced dispersal varies regionally (from strong to very<br>\nstrong).<br>\nDispersal pathways are predicted to be affected by larval behaviour in ways<br>\nwhich could influence the distribution of species.<br>\nFor deep-sea populations, the uncertainty in modelled dispersal and connectivity<br>\nassociated with vertical larval positioning in the water column is potentially<br>\nan order of magnitude larger than that associated with pelagic larval duration<br>\nor model hydrodynamics.<br>\nThe knowledge gaps in larval behaviour which contribute most to the uncertainty<br>\nconcern settling &ndash; the age at which larvae start to sink, and the sinking<br>\nrate.<br>\nIn the absence of detailed knowledge of larval development, time-series observations<br>\nof larval position in the water column could be used to constrain<br>\nmodels, hugely reducing uncertainty in predictions.<br>\nUnder the most dispersive behaviour modelled, populations throughout the<br>\nNorth Atlantic would be connected. Seamount populations may be crucial<br>\nstepping stones in this wider connectivity.<br>\nIn the more dispersive scenarios two large-scale closed connectivity loops were<br>\nidentified, one anticlockwise around the North Atlantic basin with west-east<br>\nreturn via the Azores, the second smaller loop following the sub-polar gyre.<br>\nEven for the least dispersive behaviour modelled, populations along the continental<br>\nslope may be connected anticlockwise around the North Atlantic, depending on the detailed habitat distribution.<br>\nThese conclusions are based on a large, systematic Lagrangian modelling experiment,<br>\ntracking about 10 million virtual particles over 50 years in contrasting<br>\ndynamical regimes around the North Atlantic Ocean.</p>", 
  "author": [
    {
      "family": "Fox, Alan"
    }, 
    {
      "family": "Gary, Stefan"
    }, 
    {
      "family": "Biastoch, Arne"
    }, 
    {
      "family": "Roberts, J Murray"
    }
  ], 
  "note": "10.5281/zenodo.3548344", 
  "type": "report", 
  "id": "3548735"
}
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