Mangrove response to environmental change in Australia's Gulf of Carpentaria

Emma Asbridge, Richard Lucas, Catherine Ticehurst, Peter Bunting

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

139 Wedi eu Llwytho i Lawr (Pure)


Across their range, mangroves are responding to coastal environmental change. However, separating the influence of human activities from natural events and processes (including that associated with climatic fluctuation) is often difficult. In the Gulf of Carpentaria, northern Australia (Leichhardt, Nicholson, Mornington Inlet, and Flinders River catchments), changes in mangroves are assumed to be the result of natural drivers as human impacts are minimal. By comparing classifications from time series of Landsat sensor data for the period 1987–2014, mangroves were observed to have extended seawards by up to 1.9 km (perpendicular to the coastline), with inland intrusion occurring along many of the rivers and rivulets in the tidal reaches. Seaward expansion was particularly evident near the mouth of the Leichhardt River, and was associated with peaks in river discharge with LiDAR data indicating distinct structural zones developing following each large rainfall and discharge event. However, along the Gulf coast, and particularly within the Mornington Inlet catchment, the expansion was more gradual and linked to inundation and regular sediment supply through freshwater input. Landward expansion along the Mornington Inlet catchment was attributed to the combined effects of sea level rise and prolonged periods of tidal and freshwater inundation on coastal lowlands. The study concluded that increased amounts of rainfall and associated flooding and sea level rise were responsible for recent seaward and landward extension of mangroves in this region.
Iaith wreiddiolSaesneg
Rhif yr erthygl2140
Tudalennau (o-i)3523-3539
CyfnodolynEcology and Evolution
Rhif cyhoeddi11
Dyddiad ar-lein cynnar20 Ebr 2016
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 31 Mai 2016

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