Assessing the distribution and drivers of mangrove dieback in Kakadu National Park, northern Australia

Emma Asbridge, R. Bartolo, C. M. Finlayson, R. M. Lucas, K. Rogers, C. D. Woodroffe

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Satellite observations of Australia's Gulf of Carpentaria between 1987 and 2015 highlighted that many mangroves on the coastline bounding low-lying plains were progressively extending inland and to a lesser extent, in a seaward direction. However, in 2015/16, a significant and widely publicised mangrove dieback event occurred, this was attributed to a combination of climate (temperature, precipitation anomalies) and a ~20–30 cm decline in sea level. A similar but unreported event also occurred in Kakadu National Park (NP) in the Northern Territory. This study aimed to a) quantify the extent of this dieback in the NP, b) establish the characteristics of mangroves (floristics, structure) and the substrate elevation prior to and following event and c) establish links with climate and sea level. Using time-series of high resolution airborne and Unmanned Airborne Vehicle (UAV) data, the majority of mangroves experiencing full or partial dieback were found to occur on the landward margins. Reference to sea-level data indicated that mangroves had colonised and retreated in unison with sea level fluctuations over previous decades but increased in overall extent and cover as sea level rise dominated. Mangroves experiencing full mortality were located on higher elevation substrates where the sea level/tidal influence was least. The study concluded that whilst short-term ENSO-related sea level may result in dieback in northern Australia, the long-term projection of an increase in sea level is anticipated to lead to extension of mangroves in the landward direction.

Original languageEnglish
Article number106353
Pages (from-to)1-12
Number of pages12
JournalEstuarine, Coastal and Shelf Science
Volume228
Early online date28 Aug 2019
DOIs
Publication statusPublished - 15 Nov 2019

Fingerprint

dieback
mangrove
sea level
national parks
national park
substrate
climate
Northern Territory
distribution
floristics
El Nino-Southern Oscillation
time series analysis
time series
anomaly
mortality
coast
coasts

Cite this

Asbridge, Emma ; Bartolo, R. ; Finlayson, C. M. ; Lucas, R. M. ; Rogers, K. ; Woodroffe, C. D. / Assessing the distribution and drivers of mangrove dieback in Kakadu National Park, northern Australia. In: Estuarine, Coastal and Shelf Science. 2019 ; Vol. 228. pp. 1-12.
@article{f5f963186add41709fbd7eaa7a202ba1,
title = "Assessing the distribution and drivers of mangrove dieback in Kakadu National Park, northern Australia",
abstract = "Satellite observations of Australia's Gulf of Carpentaria between 1987 and 2015 highlighted that many mangroves on the coastline bounding low-lying plains were progressively extending inland and to a lesser extent, in a seaward direction. However, in 2015/16, a significant and widely publicised mangrove dieback event occurred, this was attributed to a combination of climate (temperature, precipitation anomalies) and a ~20–30 cm decline in sea level. A similar but unreported event also occurred in Kakadu National Park (NP) in the Northern Territory. This study aimed to a) quantify the extent of this dieback in the NP, b) establish the characteristics of mangroves (floristics, structure) and the substrate elevation prior to and following event and c) establish links with climate and sea level. Using time-series of high resolution airborne and Unmanned Airborne Vehicle (UAV) data, the majority of mangroves experiencing full or partial dieback were found to occur on the landward margins. Reference to sea-level data indicated that mangroves had colonised and retreated in unison with sea level fluctuations over previous decades but increased in overall extent and cover as sea level rise dominated. Mangroves experiencing full mortality were located on higher elevation substrates where the sea level/tidal influence was least. The study concluded that whilst short-term ENSO-related sea level may result in dieback in northern Australia, the long-term projection of an increase in sea level is anticipated to lead to extension of mangroves in the landward direction.",
keywords = "Avicennia marina, Colonisation, Retreat, Sea level rise, Surface elevation, Tidal wetlands",
author = "Emma Asbridge and R. Bartolo and Finlayson, {C. M.} and Lucas, {R. M.} and K. Rogers and Woodroffe, {C. D.}",
year = "2019",
month = "11",
day = "15",
doi = "10.1016/j.ecss.2019.106353",
language = "English",
volume = "228",
pages = "1--12",
journal = "Estuarine, Coastal and Shelf Science",
issn = "0272-7714",
publisher = "Academic Press",

}

Assessing the distribution and drivers of mangrove dieback in Kakadu National Park, northern Australia. / Asbridge, Emma; Bartolo, R.; Finlayson, C. M.; Lucas, R. M.; Rogers, K.; Woodroffe, C. D.

In: Estuarine, Coastal and Shelf Science, Vol. 228, 106353, 15.11.2019, p. 1-12.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Assessing the distribution and drivers of mangrove dieback in Kakadu National Park, northern Australia

AU - Asbridge, Emma

AU - Bartolo, R.

AU - Finlayson, C. M.

AU - Lucas, R. M.

AU - Rogers, K.

AU - Woodroffe, C. D.

PY - 2019/11/15

Y1 - 2019/11/15

N2 - Satellite observations of Australia's Gulf of Carpentaria between 1987 and 2015 highlighted that many mangroves on the coastline bounding low-lying plains were progressively extending inland and to a lesser extent, in a seaward direction. However, in 2015/16, a significant and widely publicised mangrove dieback event occurred, this was attributed to a combination of climate (temperature, precipitation anomalies) and a ~20–30 cm decline in sea level. A similar but unreported event also occurred in Kakadu National Park (NP) in the Northern Territory. This study aimed to a) quantify the extent of this dieback in the NP, b) establish the characteristics of mangroves (floristics, structure) and the substrate elevation prior to and following event and c) establish links with climate and sea level. Using time-series of high resolution airborne and Unmanned Airborne Vehicle (UAV) data, the majority of mangroves experiencing full or partial dieback were found to occur on the landward margins. Reference to sea-level data indicated that mangroves had colonised and retreated in unison with sea level fluctuations over previous decades but increased in overall extent and cover as sea level rise dominated. Mangroves experiencing full mortality were located on higher elevation substrates where the sea level/tidal influence was least. The study concluded that whilst short-term ENSO-related sea level may result in dieback in northern Australia, the long-term projection of an increase in sea level is anticipated to lead to extension of mangroves in the landward direction.

AB - Satellite observations of Australia's Gulf of Carpentaria between 1987 and 2015 highlighted that many mangroves on the coastline bounding low-lying plains were progressively extending inland and to a lesser extent, in a seaward direction. However, in 2015/16, a significant and widely publicised mangrove dieback event occurred, this was attributed to a combination of climate (temperature, precipitation anomalies) and a ~20–30 cm decline in sea level. A similar but unreported event also occurred in Kakadu National Park (NP) in the Northern Territory. This study aimed to a) quantify the extent of this dieback in the NP, b) establish the characteristics of mangroves (floristics, structure) and the substrate elevation prior to and following event and c) establish links with climate and sea level. Using time-series of high resolution airborne and Unmanned Airborne Vehicle (UAV) data, the majority of mangroves experiencing full or partial dieback were found to occur on the landward margins. Reference to sea-level data indicated that mangroves had colonised and retreated in unison with sea level fluctuations over previous decades but increased in overall extent and cover as sea level rise dominated. Mangroves experiencing full mortality were located on higher elevation substrates where the sea level/tidal influence was least. The study concluded that whilst short-term ENSO-related sea level may result in dieback in northern Australia, the long-term projection of an increase in sea level is anticipated to lead to extension of mangroves in the landward direction.

KW - Avicennia marina

KW - Colonisation

KW - Retreat

KW - Sea level rise

KW - Surface elevation

KW - Tidal wetlands

UR - http://www.scopus.com/inward/record.url?scp=85071985430&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85071985430&partnerID=8YFLogxK

U2 - 10.1016/j.ecss.2019.106353

DO - 10.1016/j.ecss.2019.106353

M3 - Article

AN - SCOPUS:85071985430

VL - 228

SP - 1

EP - 12

JO - Estuarine, Coastal and Shelf Science

JF - Estuarine, Coastal and Shelf Science

SN - 0272-7714

M1 - 106353

ER -