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Ocean dispersal modelling for propagules of pond apple (Annona glabra L.)

Citation

Mason, LB and Setter, MJ and Setter, SD and Hardy, TA, Ocean dispersal modelling for propagules of pond apple (Annona glabra L.), Proceedings of the 16th Australian Weeds Conference, 18-22 May 2008, Cairns, Queensland, Australia, pp. 519-522. ISBN 9780646515434 (2008) [Refereed Conference Paper]

Abstract

Pond apple invades riparian and coastal environments with water acting as the main vector for dispersal. As seeds float and can reach the ocean, a seed tracking model driven by near surface ocean currents was used to develop maps of potential seed dispersal. Seeds were ‘released’ in the model from sites near the mouths of major North Queensland rivers. Most seeds reach land within three months of release, settling predominately on windward-facing locations. During calm and monsoonal conditions, seeds were generally swept in a southerly direction, however movement turns northward during south easterly trade winds. Seeds released in February from the Johnstone River were capable of being moved anywhere from 100 km north to 150 km south depending on prevailing conditions. Although wind driven currents are the primary mechanism influencing seed dispersal, tidal currents, the East Australian Current, and other factors such as coastline orientation, release location and time also play an important role in determining dispersal patterns. In extreme events such as tropical cyclone Justin in 1997, north east coast rivers could potentially transport seed over 1300 km to the Torres Strait, Papua New Guinea and beyond

Item Details

Item Type:Refereed Conference Paper
Research Division:Engineering
Research Group:Maritime Engineering
Research Field:Maritime Engineering not elsewhere classified
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Environment not elsewhere classified
Author:Mason, LB (Mr Luciano Mason)
Author:Hardy, TA (Professor Tom Hardy)
ID Code:81903
Year Published:2008
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2013-01-10
Last Modified:2014-12-19
Downloads:0

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