Indigenous impacts on north Australian savanna fire regimes over the Holocene

Abstract Fire is an essential component of tropical savannas, driving key ecological feedbacks and functions. Indigenous manipulation of fire has been practiced for tens of millennia in Australian savannas, and there is a renewed interest in understanding the effects of anthropogenic burning on sava...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Christopher M. Wurster, Cassandra Rowe, Costijn Zwart, Dirk Sachse, Vladimir Levchenko, Michael I. Bird
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/14f0f7154fa94427afa070cfb8be1b27
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:14f0f7154fa94427afa070cfb8be1b27
record_format	dspace
spelling	oai:doaj.org-article:14f0f7154fa94427afa070cfb8be1b272021-12-05T12:16:09ZIndigenous impacts on north Australian savanna fire regimes over the Holocene10.1038/s41598-021-02618-z2045-2322https://doaj.org/article/14f0f7154fa94427afa070cfb8be1b272021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02618-zhttps://doaj.org/toc/2045-2322Abstract Fire is an essential component of tropical savannas, driving key ecological feedbacks and functions. Indigenous manipulation of fire has been practiced for tens of millennia in Australian savannas, and there is a renewed interest in understanding the effects of anthropogenic burning on savanna systems. However, separating the impacts of natural and human fire regimes on millennial timescales remains difficult. Here we show using palynological and isotope geochemical proxy records from a rare permanent water body in Northern Australia that vegetation, climate, and fire dynamics were intimately linked over the early to mid-Holocene. As the El Niño/Southern Oscillation (ENSO) intensified during the late Holocene, a decoupling occurred between fire intensity and frequency, landscape vegetation, and the source of vegetation burnt. We infer from this decoupling, that indigenous fire management began or intensified at around 3 cal kyr BP, possibly as a response to ENSO related climate variability. Indigenous fire management reduced fire intensity and targeted understory tropical grasses, enabling woody thickening to continue in a drying climate.Christopher M. WursterCassandra RoweCostijn ZwartDirk SachseVladimir LevchenkoMichael I. BirdNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Christopher M. Wurster Cassandra Rowe Costijn Zwart Dirk Sachse Vladimir Levchenko Michael I. Bird Indigenous impacts on north Australian savanna fire regimes over the Holocene
description	Abstract Fire is an essential component of tropical savannas, driving key ecological feedbacks and functions. Indigenous manipulation of fire has been practiced for tens of millennia in Australian savannas, and there is a renewed interest in understanding the effects of anthropogenic burning on savanna systems. However, separating the impacts of natural and human fire regimes on millennial timescales remains difficult. Here we show using palynological and isotope geochemical proxy records from a rare permanent water body in Northern Australia that vegetation, climate, and fire dynamics were intimately linked over the early to mid-Holocene. As the El Niño/Southern Oscillation (ENSO) intensified during the late Holocene, a decoupling occurred between fire intensity and frequency, landscape vegetation, and the source of vegetation burnt. We infer from this decoupling, that indigenous fire management began or intensified at around 3 cal kyr BP, possibly as a response to ENSO related climate variability. Indigenous fire management reduced fire intensity and targeted understory tropical grasses, enabling woody thickening to continue in a drying climate.
format	article
author	Christopher M. Wurster Cassandra Rowe Costijn Zwart Dirk Sachse Vladimir Levchenko Michael I. Bird
author_facet	Christopher M. Wurster Cassandra Rowe Costijn Zwart Dirk Sachse Vladimir Levchenko Michael I. Bird
author_sort	Christopher M. Wurster
title	Indigenous impacts on north Australian savanna fire regimes over the Holocene
title_short	Indigenous impacts on north Australian savanna fire regimes over the Holocene
title_full	Indigenous impacts on north Australian savanna fire regimes over the Holocene
title_fullStr	Indigenous impacts on north Australian savanna fire regimes over the Holocene
title_full_unstemmed	Indigenous impacts on north Australian savanna fire regimes over the Holocene
title_sort	indigenous impacts on north australian savanna fire regimes over the holocene
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/14f0f7154fa94427afa070cfb8be1b27
work_keys_str_mv	AT christophermwurster indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene AT cassandrarowe indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene AT costijnzwart indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene AT dirksachse indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene AT vladimirlevchenko indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene AT michaelibird indigenousimpactsonnorthaustraliansavannafireregimesovertheholocene
_version_	1718372059901329408

Indigenous impacts on north Australian savanna fire regimes over the Holocene

Ejemplares similares