Seasonal habitats, decadal trends in abundance and cultural values of magpie geese (Anseranus semipalmata) on coastal floodplains in the Kakadu Region, northern Australia

Peter Bayliss, Emma Ligtermoet

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The magpie goose is an iconic tropical species highly valued as a conservation asset and by Aboriginal people as a cultural resource. Most of the global population occurs in the Kakadu Region of northern Australia, which is at high risk from the combined impacts of invasive species and future sea-level rise. Future management responses require an increased understanding of their spatial and temporal dynamics and customary value. Historical aerial-survey data of geese and their nests in the Kakadu Region (1981-2006, 25 years) were used to characterise seasonal use of floodplains. Habitat 'hotspots' co-occurred with high abundance of plants that provide nesting material in the wet season and food in the dry season, particularly the bulbs of Eleocharis dulcis sedge. Goose numbers across the Northern Territory (1958-2000, n = 42 years) exhibited 20-year decadal trends coupled with similar trends in rainfall and stream flow (1954-2006), which in turn were influenced strongly by global-scale interactions between the El Niño-Southern Oscillation and Pacific Decadal Oscillation. Stream flow drives the spatial and temporal dynamics of magpie geese at regional and decadal scales through its direct influence on floodplain-vegetation dynamics. Customary harvesting practices of geese and their eggs ascertained from interviews (2011-2014) showed that their cultural value extends beyond consumption, highlighting the need to address socio-ecological contexts in future management responses.

Original languageEnglish
Pages (from-to)1079-1091
Number of pages13
JournalMarine and Freshwater Research
Volume69
Issue number7
DOIs
Publication statusPublished - 1 Jan 2018
Externally publishedYes

Fingerprint

cultural values
Geese
geese
floodplains
Ecosystem
streamflow
floodplain
Pacific Decadal Oscillation
indigenous population
aerial survey
sedge
Southern Oscillation
vegetation dynamics
habitat
habitats
invasive species
wet season
dry season
stream flow
nest

Cite this

@article{5843acdbad1a424a8accdb7797676d5e,
title = "Seasonal habitats, decadal trends in abundance and cultural values of magpie geese (Anseranus semipalmata) on coastal floodplains in the Kakadu Region, northern Australia",
abstract = "The magpie goose is an iconic tropical species highly valued as a conservation asset and by Aboriginal people as a cultural resource. Most of the global population occurs in the Kakadu Region of northern Australia, which is at high risk from the combined impacts of invasive species and future sea-level rise. Future management responses require an increased understanding of their spatial and temporal dynamics and customary value. Historical aerial-survey data of geese and their nests in the Kakadu Region (1981-2006, 25 years) were used to characterise seasonal use of floodplains. Habitat 'hotspots' co-occurred with high abundance of plants that provide nesting material in the wet season and food in the dry season, particularly the bulbs of Eleocharis dulcis sedge. Goose numbers across the Northern Territory (1958-2000, n = 42 years) exhibited 20-year decadal trends coupled with similar trends in rainfall and stream flow (1954-2006), which in turn were influenced strongly by global-scale interactions between the El Ni{\~n}o-Southern Oscillation and Pacific Decadal Oscillation. Stream flow drives the spatial and temporal dynamics of magpie geese at regional and decadal scales through its direct influence on floodplain-vegetation dynamics. Customary harvesting practices of geese and their eggs ascertained from interviews (2011-2014) showed that their cultural value extends beyond consumption, highlighting the need to address socio-ecological contexts in future management responses.",
keywords = "Climate change, El Ni{\~n}o-Southern oscillation, ENSO, Invasive species, Pacific decadal oscillation, PDO, Ramsar, SOI, Southern oscillation index, Traditional owners, World heritage",
author = "Peter Bayliss and Emma Ligtermoet",
year = "2018",
month = "1",
day = "1",
doi = "10.1071/MF16118",
language = "English",
volume = "69",
pages = "1079--1091",
journal = "Marine Freshwater Research",
issn = "0067-1940",
publisher = "CSIRO Publishing",
number = "7",

}

TY - JOUR

T1 - Seasonal habitats, decadal trends in abundance and cultural values of magpie geese (Anseranus semipalmata) on coastal floodplains in the Kakadu Region, northern Australia

AU - Bayliss, Peter

AU - Ligtermoet, Emma

PY - 2018/1/1

Y1 - 2018/1/1

N2 - The magpie goose is an iconic tropical species highly valued as a conservation asset and by Aboriginal people as a cultural resource. Most of the global population occurs in the Kakadu Region of northern Australia, which is at high risk from the combined impacts of invasive species and future sea-level rise. Future management responses require an increased understanding of their spatial and temporal dynamics and customary value. Historical aerial-survey data of geese and their nests in the Kakadu Region (1981-2006, 25 years) were used to characterise seasonal use of floodplains. Habitat 'hotspots' co-occurred with high abundance of plants that provide nesting material in the wet season and food in the dry season, particularly the bulbs of Eleocharis dulcis sedge. Goose numbers across the Northern Territory (1958-2000, n = 42 years) exhibited 20-year decadal trends coupled with similar trends in rainfall and stream flow (1954-2006), which in turn were influenced strongly by global-scale interactions between the El Niño-Southern Oscillation and Pacific Decadal Oscillation. Stream flow drives the spatial and temporal dynamics of magpie geese at regional and decadal scales through its direct influence on floodplain-vegetation dynamics. Customary harvesting practices of geese and their eggs ascertained from interviews (2011-2014) showed that their cultural value extends beyond consumption, highlighting the need to address socio-ecological contexts in future management responses.

AB - The magpie goose is an iconic tropical species highly valued as a conservation asset and by Aboriginal people as a cultural resource. Most of the global population occurs in the Kakadu Region of northern Australia, which is at high risk from the combined impacts of invasive species and future sea-level rise. Future management responses require an increased understanding of their spatial and temporal dynamics and customary value. Historical aerial-survey data of geese and their nests in the Kakadu Region (1981-2006, 25 years) were used to characterise seasonal use of floodplains. Habitat 'hotspots' co-occurred with high abundance of plants that provide nesting material in the wet season and food in the dry season, particularly the bulbs of Eleocharis dulcis sedge. Goose numbers across the Northern Territory (1958-2000, n = 42 years) exhibited 20-year decadal trends coupled with similar trends in rainfall and stream flow (1954-2006), which in turn were influenced strongly by global-scale interactions between the El Niño-Southern Oscillation and Pacific Decadal Oscillation. Stream flow drives the spatial and temporal dynamics of magpie geese at regional and decadal scales through its direct influence on floodplain-vegetation dynamics. Customary harvesting practices of geese and their eggs ascertained from interviews (2011-2014) showed that their cultural value extends beyond consumption, highlighting the need to address socio-ecological contexts in future management responses.

KW - Climate change

KW - El Niño-Southern oscillation

KW - ENSO

KW - Invasive species

KW - Pacific decadal oscillation

KW - PDO

KW - Ramsar

KW - SOI

KW - Southern oscillation index

KW - Traditional owners

KW - World heritage

UR - http://www.scopus.com/inward/record.url?scp=85048937681&partnerID=8YFLogxK

U2 - 10.1071/MF16118

DO - 10.1071/MF16118

M3 - Article

VL - 69

SP - 1079

EP - 1091

JO - Marine Freshwater Research

JF - Marine Freshwater Research

SN - 0067-1940

IS - 7

ER -