Palaeoenyironments and human impact at Burraga Swamp in Montane rainforest, Barrington tops National Park, New South Wales, Australia

Dodson, John; Roberts, F.; Salis, T. de

doi:10.1080/00049189408703115

Cited by 22 publications

(9 citation statements)

References 10 publications

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“…We found no change in sedimentation rate at Diprose Lagoon. This was unexpected because most sediment cores from southern Australia show that a clear increase in sedimentation occurred shortly after the arrival of Europeans in the region (Dodson et al 1994a(Dodson et al , 1994bMooney and Dodson 2001). Sediment deposition is increased when vegetation cover is removed through fire or tree removal, which allows erosion to occur.…”

Section: Discussionmentioning

confidence: 99%

Fire regime and vegetation change in the transition from Aboriginal to European land management in a Tasmanian eucalypt savanna

et al. 2016

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Using pollen and charcoal analysis we examined how vegetation and fire regimes have changed over the last 600 years in the Midlands of Tasmania. Sediment cores from seven lagoons were sampled, with a chronology developed at one site (Diprose Lagoon) using 210Pb and 14C dating. Statistical contrasts of six cores where Pinus served as a marker of European settlement in the early 19th Century and showed significant changes in pollen composition following settlement with (a) influx of ruderal exotic taxa including Plantago lanceolata L., Brassicaceae, Asteraceae (Liguliflorae) and Rumex, (b) increase in pollen of the aquatics Myriophyllum spp. and Cyperaceae, (c) a decline in native herbaceous pollen taxa, including Chenopodiaceae and Asteraceae (Tubuliflorae) and (d) a decline in Allocasuarina and an initial decline and then increase of Poaceae. The presence of Asteraceae (Liguliflorae) in the pre-European period suggests that an important root vegetable Microseris lanceolata (Walp.) Sch.Bip. may have been abundant. Charcoal deposition was low in the pre-European period and significantly increased immediately after European arrival. Collectively, these changes suggest substantial ecological impacts following European settlement including cessation of Aboriginal traditions of fire management, a shift in hydrological conditions from open water lagoons to more ephemeral herb covered lagoons, and increased diversity of alien herbaceous species following pasture establishment.

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Section: Discussionmentioning

confidence: 99%

Fire regime and vegetation change in the transition from Aboriginal to European land management in a Tasmanian eucalypt savanna

et al. 2016

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“…During the last glacial maximum (~18–15 kya), south‐east Australia was cold and dry, with alpine grasslands widespread and extending to low elevations (White, ; Williams et al ., ). The forests that survived these times in refugia have since expanded their distributions, although the alpine grasslands and the species they support have contracted to small refugia at higher elevations (Dodson, ; Dodson et al ., ; NSW Scientific Committee, ). These refugia may include the topographical depressions on the Barrington Plateau where grasslands and upland swamps are found, although the swamps will be moister than many locations during the drier glacial period.…”

Section: Methodsmentioning

confidence: 99%

A novel approach to quantify and locate potential microrefugia using topoclimate, climate stability, and isolation from the matrix

Ashcroft

Gollan

Warton

et al. 2012

Global Change Biology

199

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Ramp, D. (2012). A novel approach to quantify and locate potential microrefugia using topoclimate, climate stability, and isolation from the matrix. Global Change Biology, 18 (6), 1866-1879. A novel approach to quantify and locate potential microrefugia using topoclimate, climate stability, and isolation from the matrix AbstractEcologists are increasingly recognizing the conservation significance of microrefugia, but it is inherently difficult to locate these small patches with unusual climates, and hence they are also referred to as cryptic refugia. Here we introduce a new methodology to quantify and locate potential microrefugia using fine-scale topoclimatic grids that capture extreme conditions, stable climates, and distinct differences from the surrounding matrix. We collected hourly temperature data from 150 sites in a large (200 km by 300 km) and diverse region of New South Wales, Australia, for a total of 671 days over 2 years. Sites spanned a range of habitats including coastal dune shrublands, eucalypt forests, exposed woodland ridges, sheltered rainforest gullies, upland swamps, and lowland pastures. Climate grids were interpolated using a regional regression approach based on elevation, distance to coast, canopy cover, latitude, cold-air drainage, and topographical exposure to winds and radiation. We identified extreme temperatures on two separate climatic gradients: the 5th percentile of minimum temperatures and the 95th percentile of maximum temperatures. For each gradient, climatic stability was assessed on three different time scales (intra-seasonal, intra-annual and interannual). Differences from the matrix were assessed using a moving window with a 5 km radius. We averaged the Z-scores for these extreme, stable and isolated climates to identify potential locations of microrefugia. We found that our method successfully predicted the location of communities that were considered to occupy refugia, such as rainforests that have progressively contracted in distribution over the last 2.5 million years, and alpine grasslands that have contracted over the last 15 thousand years. However, the method was inherently sensitive to the gradient selected and other aspects of the modelling process. These uncertainties could be dealt with in a conservation planning context by repeating the methodology with various parameterizations and identifying areas that were consistently identified as microrefugia. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsAshcroft, M. B., Gollan, J. R., Warton, D. I. & Ramp, D. (2012). A novel approach to quantify and locate potential microrefugia using topoclimate, climate stability, and isolation from the matrix. Global Change Biology, 18 (6), 1866-1879. AbstractEcologists are increasingly recognising the conservation significance of microrefugia, but it is inherent difficult to locate these small patches with unusual climates, and hence they are also referred to as cryptic refugia. Here we introduce a new methodology to quantify an...

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“…4a–c). The presence of Pinus pollen is traditionally used to separate historical and prehistorical sediments in Australian palynology (Kodela & Mackillop 1988; Dodson et al 1994a, 1994b, 1994c, 1995; Mooney et al 1997). Pinus , however, was extremely rare in the pollen record at all three sites.…”

Section: Resultsmentioning

confidence: 99%

A palynological reconstruction of pre‐European riparian vegetation at Wollombi, New South Wales and its application to stream bank management and revegetation

Bennett¹,

Mooney²

2003

Eco Management Restoration

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Summary A palynological investigation was conducted on sediments from three small floodplain swamps on upper Wollombi Brook in the Hunter Valley NSW in order to reconstruct pre‐European riparian vegetation composition and community structure. Pre‐European riparian plant communities on upper Wollombi Brook were characterized by wet sclerophyll forest associations with rainforest elements (most likely close to the channel). Major changes in both the nature and extent of riparian vegetation have been associated with European settlement. The pre‐European pollen spectra assists the identification of a suite of native taxa potentially suitable for use in riparian revegetation operations, particularly in highly cleared streambank sites where protection of water quality and aquatic habitat is an important goal but where insufficient local remnants are available to indicate pre‐existing plant species. The research emphasizes the use of palaeoenvironmental evidence as a tool for contemporary environmental management.

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Palaeoenyironments and human impact at Burraga Swamp in Montane rainforest, Barrington tops National Park, New South Wales, Australia

Cited by 22 publications

References 10 publications

Fire regime and vegetation change in the transition from Aboriginal to European land management in a Tasmanian eucalypt savanna

Fire regime and vegetation change in the transition from Aboriginal to European land management in a Tasmanian eucalypt savanna

A novel approach to quantify and locate potential microrefugia using topoclimate, climate stability, and isolation from the matrix

A palynological reconstruction of pre‐European riparian vegetation at Wollombi, New South Wales and its application to stream bank management and revegetation

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