Fraser Island Research Articles

Aboriginal marine subsistence foraging flexibility in a dynamic estuarine environment: The late development of Tin Can Inlet (southeast Queensland) middens revisited

Although the sea arrived in southeast Queensland around 8000 years ago, most estuarine middens date to the past 1000 years. An example is midden deposits dating to the past 400 years forming the upper levels of Sites 62 and 75b from Tin Can Inlet located immediately south of the Fraser Island (K’gari) World Heritage Area. Both sites were excavated and analysed in the 1980s. This paper revisits these results following a detailed re-analysis of midden materials and new insights on regional sea level changes. Taking an historical ecology approach, species-specific habitat requirements and associated substrate sediment dynamics help explain similarities and differences between the two midden shell assemblages. Environmental factors and the location of both sites on landforms that formed following sea level fall over the past 2000 years help explain why the basal levels of both sites are probably <1000–1500 years old. Documenting pre-2000-year-old Aboriginal use of Tin Can Inlet will need to target more elevated inland dune deposits (>5m ASL) fronting the mid-Holocene sea level highstand palaeoshoreline.

Without management interventions, endemic wet-sclerophyll forest is transitioning to rainforest in World Heritage listed K'gari (Fraser Island), Australia.

Wet‐sclerophyll forests are unique ecosystems that can transition to dry‐sclerophyll forests or to rainforests. Understanding of the dynamics of these forests for conservation is limited. We evaluated the long‐term succession of wet‐sclerophyll forest on World Heritage listed K'gari (Fraser Island)—the world's largest sand island. We recorded the presence and growth of tree species in three 0.4 hectare plots that had been subjected to selective logging, fire, and cyclone disturbance over 65 years, from 1952 to 2017. Irrespective of disturbance regimes, which varied between plots, rainforest trees recruited at much faster rates than the dominant wet‐sclerophyll forest trees, narrowly endemic species Syncarpia hillii and more common Lophostemon confertus. Syncarpia hillii did not recruit at the plot with the least disturbance and recruited only in low numbers at plots with more prominent disturbance regimes in the ≥10 cm at breast height size. Lophostemon confertus recruited at all plots but in much lower numbers than rainforest trees. Only five L. confertus were detected in the smallest size class (<10 cm diameter) in the 2017 survey. Overall, we find evidence that more pronounced disturbance regimes than those that have occurred over the past 65 years may be required to conserve this wet‐sclerophyll forest, as without intervention, transition to rainforest is a likely trajectory. Fire and other management tools should therefore be explored, in collaboration with Indigenous landowners, to ensure conservation of this wet‐sclerophyll forest.

Towards eradication: The history and management of Bitou Bush on K'gari‐Fraser Island, Australia

Persistence and dedication over the long term has been a key to success in control of this Weed of National Significance on World Heritage Listed K'gari‐Fraser Island in Queensland, Australia. Systematic surveys and treatment show that the goal of Bitou Bush eradication is worthwhile and can inspire other such projects within the region and beyond.

Elucidating biogeographical patterns in Australian native canids using genome wide SNPs.

Dingoes play a strong role in Australia’s ecological framework as the apex predator but are under threat from hybridization and agricultural control programs. Government legislation lists the conservation of the dingo as an important aim, yet little is known about the biogeography of this enigmatic canine, making conservation difficult. Mitochondrial and Y chromosome DNA studies show evidence of population structure within the dingo. Here, we present the data from Illumina HD canine chip genotyping for 23 dingoes from five regional populations, and five New Guinea Singing Dogs to further explore patterns of biogeography using genome-wide data. Whole genome single nucleotide polymorphism (SNP) data supported the presence of three distinct dingo populations (or ESUs) subject to geographical subdivision: southeastern (SE), Fraser Island (FI) and northwestern (NW). These ESUs should be managed discretely. The FI dingoes are a known reservoir of pure, genetically distinct dingoes. Elevated inbreeding coefficients identified here suggest this population may be genetically compromised and in need of rescue; current lethal management strategies that do not consider genetic information should be suspended until further data can be gathered. D statistics identify evidence of historical admixture or ancestry sharing between southeastern dingoes and South East Asian village dogs. Conservation efforts on mainland Australia should focus on the SE dingo population that is under pressure from domestic dog hybridization and high levels of lethal control. Further data concerning the genetic health, demographics and prevalence of hybridization in the SE and FI dingo populations is urgently needed to develop evidence based conservation and management strategies.

Dingo singing: the howl of the advocate

World Heritage protected areas are increasingly valuable for civil society. Sectors of broader society can feel invested in such areas and engage in forms of conservation advocacy that challenge traditional formal management. Advocacy is found wherever management decisions are negotiated or contested, revealing sharp divides in positions. But there are also opportunities for partnerships in advocacy. Identifying the narrative details of advocacy positions is crucial but complicated when the parties being represented are non-human animals, plant species or broader environments: they depend on the advocate’s voice as they cannot speak in any literal sense. Thus advocates discussed in this paper are those representing scientific decision-frames: managers and scientists. Both groups frequently draw on empirical research, giving primacy to the proof of scientific voice. In this research we presented methods to build interdisciplinary literacy to move beyond traditional categorical analysis. Semantic mapping was applied to identify narrative themes as the basis for close textual analysis in a specific case study: advocacy on behalf of the K’gari-Fraser Island dingo. We differentiated three critical pillars of wisdom – Indigenous, local and scientific – but here only considered the advocacy positions within the scientific knowledge decision-making community. Thus, we compared positions taken by the formal management community (government managers) with positions taken in the scientific research community (academic researchers). Narrative themes in advocacy agendas and metaphorical strategies taken to frame positions identify differences and common ground for the two groups. Management advocacy was premised on limits to human–dingo interaction while science advocacy called for dingo welfare. The synergy was tourists, defined as the greatest threat to dingo welfare and viability. This common ground provides an effective starting point to support dingo interests. Identifying options and constraints in advocacy positions is crucial for the future of dingoes on K’gari, but also for all people who engage with World Heritage values. Implicitly, this paper defends the place of advocacy in scientific discussion. By exploring potential options for negotiation, conservation outcomes that support contested iconic species in a World Heritage context are more likely.

Two Centuries of Climate Change and Climate Variability, East Coast Australia

On the east Australian coast, climate change is expressed as a slowly rising sea level. Analysis of records, dating back over two centuries, also shows oscillating multidecadal ‘storm’ and ‘drought’ dominated climate periods that are distinct from long-term climate change. Climate variability, as expressed by these distinct multidecadal periods, is generally associated with phases of the Interdecadal Pacific Oscillation Index (IPO). Two centuries of climate and coastline response are examined for the central east coast of Australia, between Fraser Island and Coffs Harbour. The long record has been compiled by analysing a wide range of indicators and observations, including: historical accounts, storm records, sea level trends, assessment of storm erosion faces, and coastal movement in relation to fixed monuments, surveys, and maps. Periods of suppressed sea level, beach accretion, and drought were found to be associated with strongly positive IPO. Periods of higher sea level, increased storminess, and beach erosion were associated with strongly negative IPO. Understanding the behaviour of climate variability over different timescales has the potential to improve the understanding of, and responses to, climate change. This will be important in the sustainable management of geomorphic and ecological systems.

Contemporary dingo management on K’gari (Fraser Island, Great Sandy National Park) under the Queensland Parks and Wildlife Service

ABSTRACTK’gari (Fraser Island) is the world’s largest sand island, lying off the east coast of mainland Australia, approximately 300 km north of Brisbane, Queensland. The island is the ancestral home of the Butchulla people, who call it K’gari, meaning paradise, and they continue to be active participants in the management and protection of the island. K’gari (Fraser Island) also has a shared history of logging and sand mining, and was partly designated as a National Park in 1971 with further additions in the following years. In July 2013, the Queensland Government, through the Queensland Parks and Wildlife Service (QPWS), released the Fraser Island Dingo Conservation and Risk Management Strategy (FIDCRMS), which included a range of management approaches to promote the best outcomes for human safety and dingo welfare on K’gari (Fraser Island). The strategy presents four programmes: Risk Intervention, Communication and Education, Research and Evaluation and Review. Compliance is recognised as an integral part of the strategy. Here, we describe and distil two of these programmes (Risk Intervention and Communication and Education) from a practical, on-ground perspective.

Utilisation of stranded marine fauna washed ashore on K’gari (Fraser Island), Australia, by dingoes

Stranded marine fauna have been identified as a potentially significant food resource for terrestrial carnivores, but how such subsidisation influences terrestrial species ecology is not well understood. We describe the dietary and behavioural responses of dingoes (Canis familiaris) to the occurrence of large-animal marine strandings (e.g. dead cetaceans, marine turtles and pinnipeds) between 2006 and 2016 on K’gari (Fraser Island), Australia, to better understand the trophic links between marine and terrestrial systems. A total of 309 strandings were recorded during this period (~3.1 strandings per month), yielding an annual average of 30.3 tons of available carrion to the 100–200 dingoes present on the island. Carcass monitoring with camera traps showed that dingoes used carcasses almost daily after a short period of decomposition. Whole packs of up to seven dingoes of all age classes at a time were observed visiting carcasses for multiple successive days. These data demonstrate that large-animal marine subsidies can be a common, substantial and important food source for dingoes, and that the estimated daily dietary needs of roughly 5–10% of the island’s dingo population were supported by this food source. Our data suggest that marine subsidisation can influence terrestrial carnivore diet, behaviour and abundance, which may produce cascading indirect effects for terrestrial ecosystems in contexts where subsidised carnivores interact strongly with other species.

Clever girl? An observation of innovative prey handling by a dingo (Canis dingo)

Predators often exhibit highly intelligent and adaptable hunting techniques to subdue large prey; however, these events are rarely captured. Here I report an infrequently seen occurrence of a dingo (Canis dingo) utilising waves on the eastern beach of K’gari (Fraser Island) to entrap, tire and deliberately drown an adult swamp wallaby (Wallabia bicolor). This behaviour highlights an adaptive technique for innovative prey handling by a single dingo to achieve an outcome that would usually take two or more animals under normal conditions.

Movements of dingoes on K’gari-Fraser Island: implications for management

ABSTRACTDingoes (Canis lupus dingo) on K’gari-Fraser Island have interacted with humans in unacceptable ways, with regular attacks and even a death of a child. Public interest in maintaining a viable dingo population on the island is intense. Hence, there is an imperative to improve the management of dingo–human interactions, and knowledge of dingo movement behaviour can assist in this effort. Eighteen dingoes (10 female, 8 male) were captured in 2011 and fitted with GPS collars programmed to record a location every two hours. Dingoes were monitored for an average of slightly more than 205 days. Total home range sizes ranged from 547 to 57,459 ha. (95 per cent fixed kernel estimate). Home ranges were also calculated for each animal during different phases of the breeding cycle. We identified four general types of movement: beach dwellers, predominantly coast and beach dwellers, coast to coast movers and mostly inland dwellers. There are some animals that have minimal chance of ever interacting with humans. There was a seasonal change in home range size with dingoes of both sexes moving further when they did not have dependent young. The home ranges we measured were comparable with mainland dingoes, offering no evidence that prey is scarcer than on the mainland.

Mid-Holocene palaeolimnological record of a Southern Hemisphere subtropical lake spanning the last ~6000 years: Lake Jennings, Fraser Island, Australia

The study of climate mechanisms in the Southern Hemisphere during the Holocene remains an area of active research that lacks the spatial and temporal connectivity characteristic of Northern Hemisphere research. The subtropical/temperate climate transition zone of eastern Australia provides a unique location to investigate long-term environmental changes during the Holocene. Lake Jennings on Fraser Island was used to investigate climate change in this transition zone using palaeolimnological techniques. The beginning of the Lake Jennings record (~6000 to 3500 cal. yBP), is characterised by fluctuations in geochemical signals, an abundance of sponge spicules, and a lack of diatom species. Results suggest gradually increasing precipitation and water depth, which affect nutrient cycling. However, the biological functioning of the lake is difficult to interpret due to the absence of diatoms, possibly a result of turbidity, dissolution and/or predation by freshwater sponges. During the late Holocene, ~3500 cal. yBP to present, precipitation and water depth of the lake decreases to present day levels. Within this section of the core nutrient cycling changes, as indicated by the geochemical results, and a series of more intense wet and dry events took place before stabilising at present day levels. Other palaeoecological studies within the Southern Hemisphere have noted changes in geochemical and biological attributes within similar latitudes, confirming the notion of climate forced environmental change in aquatic ecosystems. This continuous ~6000 year record from Lake Jennings shows distinct changes in aquatic communities, confirming a trend of drying in subtropical eastern Australia through the late Holocene.

Recreational fishing alters dingo foraging behavior on Fraser Island

ABSTRACTSupplemental feeding, whether intentional or accidental, alters wildlife foraging behaviors and may have consequences at the population and ecosystem levels. Wildlife feeding may also cause animals to develop aggressive behaviors toward conspecifics and people. The risks to humans is potentially accrued when the species is a native predator. Food‐based attraction has been implicated in the development of human‐directed aggression in the dingo (Canis lupus dingo) population on Fraser Island, Queensland, Australia. Management strategies such as education programs, prohibition of inappropriate human behaviors, and fencing of garbage dumps have been implemented to stop the (intentional or inadvertent) feeding of dingoes by people. Despite these efforts, dingoes continue to obtain human‐sourced food, suggesting that other means of supplemental feeding are still available. One possible source of subsidized food is recreational fishing, which is a popular activity on the island. We conducted a quasi‐experimental study during May–June 2014 of dingo foraging behaviors on the eastern beach of Fraser Island. We video‐recorded the behaviors of lone and groups of dingoes when they were in the vicinity of anglers or by themselves. We hypothesized that if recreational fishing was a source of subsidies to dingoes, then there would be differences in dingo foraging behavior among the 2 groups. We found that in the absence of anglers, dingoes spent 81% of their time engaged in mobile food‐related behaviors. When anglers were present, however, they spent 52% of their time sitting and resting. These results suggest that dingoes shifted from active searching to a sit and wait foraging mode upon detecting recreational anglers. We observed an event in which a dingo spent 2 hours resting near an angler, then dug up the fish remains buried by the man as soon as he had left the area. This and other anecdotal evidence support the view that the changes in dingo foraging activity detected in this study were related to increased opportunities to secure food from anglers. Recreational fishing may play an important role in the inadvertent subsidizing of dingoes on Fraser Island, although further investigations are needed before proposing and implementing additional conservation and management actions. © 2017 The Wildlife Society.

Human–dingo interactions on Fraser Island: an analysis of serious incident reports

Wild predators that attack people represent a significant challenge to the management authorities charged with conserving populations whilst minimising human safety risk. Fraser Island is home to an iconic population of dingoes (Canis dingo). However, conflict stemming from negative human–dingo interactions (incidents), some resulting in serious human injury and in one case, a fatality, is an ongoing concern. In an effort to highlight important factors influencing incident dynamics, we investigated the most serious incident reports gathered by the Queensland Parks and Wildlife Service for the period 2001–15. We found a consistent pattern of incidents peaking in March/April and also July, corresponding with dingo breeding and whelping seasons (respectively). Monthly vehicle permit numbers (a proxy for visitation) were not positively correlated with incident rates, except during the breeding season. Male dingoes, particularly subadult males, featured heavily in incidents. Despite the fatality being highly publicised and the advent of copious on-site warning messages and other management interventions, serious incidents continue to occur annually, including some involving children. This suggests that risks are either not always understood, or are otherwise being ignored. While our results demonstrate that dingoes generally pose minimal risk to humans, some risk remains, particularly where poorly supervised children are concerned.

Butchulla perspectives on dingo displacement and agency at K’gari-Fraser Island, Australia

There is a complex geography to Aboriginal-dingo-settler-dog relationships in Australia. This paper examines aspects of that geography in a world heritage area, heavily contested by multiple stakeholders for whom the dingo has come to represent resource and identity, as well as a powerful symbol of nature. The Butchulla people were recently recognised in Australian law as holding native title to world-heritage listed K’gari-Fraser Island, a decision that confers recognition and consultation rights; however, genuine ownership and control of the island is denied through a lack of joint management of the island. This paper reviews evidence from some Butchulla people who declare their ongoing dispossession through various discourses and actions that attempt to circumvent extinguishment of their title to territory. They implied that dingoes have equally endured dispossession and extinguishment of territory through common colonial discourses that subjugate the ‘other’, albeit Butchulla people and dingoes have different forms of resistance and agency. Butchulla people in our study parallel their treatment under colonial structures of governance with those of the dingo in that both have endured limited freedom of movement and expressions of sovereignty. We argue some Butchulla people liken notions of dingo agency and resistance with their own attempts to assert sovereignty and responses to displacement. Aligning with the dingo (and broader discourses and politics that surround the dingo) may afford Butchulla people a greater entitlement to be a major voice in dingo 'management' specifically, and management of the island more broadly, than their native title resolution confers.

A prickly subject: innovative handling of a difficult prey

Canids are generally considered to be ambush predators, but in island ecosystems adaptability and flexibility are essential for survival. Dingoes (Canis lupus dingo) attack and kill their prey in a variety of ways including utilising waterbodies. Here I document the drowning of an adult short-beaked echidna (Tachyglossus aculeatus) before consumption by a dingo using the coastal surf beach intertidal to shallow subtidal area on the eastern coast of Fraser Island (K’gari), highlighting an innovative prey-handling technique.

Managing a contested cultural heritage place on K’gari (Fraser Island), Queensland, Australia

ABSTRACTContestation of culturally significant places is a phenomenon that is regularly encountered in heritage management. Takky Wooroo (Indian Head), on World Heritage–inscribed K’gari (Fraser Island), is no exception. The research presented in this paper uses a multi‐vocal methodology situated within the constructivist paradigm of “Indigenous archaeologies” to evaluate contested evidence for cultural and historical significance at Takky Wooroo.Much of the contestation relates to whether or not Takky Wooroo was the site of a massacre in the nineteenth century and if so, how this impacts on the management of the place. Evidence for the massacre is investigated using oral history from Traditional Owners as well as archival sources. Perceptions of the headland held by Traditional Owners, tourists and other stakeholders are assessed as the basis for a review of management strategies for this contested place.Themes of memorialisation and association are explored and, in the absence of tangible “scientific” evidence to link Takky Wooroo with its past uses, the inclusion of intangible understandings, such as Indigenous Knowledge, are shown to be paramount in assigning significance. In particular, we argue that memorialisation, association and the archaeology of absence allow the historically documented massacre event to be linked with Takky Wooroo in a manner that is not possible through material culture assessment alone.

The Fraser Gyre: A cyclonic eddy off the coast of eastern Australia

This paper examines the on-shelf circulation of the eastern Australian continental shelf for a region off southeast Queensland. We identify a characteristic seasonally reoccurring wind-driven cyclonic flow. It influences the cross-shelf exchange with the East Australian Current (EAC), which is the western boundary current of the South Pacific Ocean. We refer to this cyclonic circulation as the Fraser Gyre. It is located south of Fraser Island between about 25 °S and 27 °S. The region is adjacent to the intensification zone of the EAC where the current accelerates and establishes a swift, albeit seasonally variable southward boundary flow. Through the analysis of several data sets including remotely sensed sea surface temperature and sea surface height anomaly, satellite tracked surface drifters, ocean and atmospheric reanalysis data as well as geostrophic currents from altimetry, we find that the on-shelf Fraser Gyre develops during the southern hemisphere autumn and winter months. The gyre is associated with a longshore near-coast northward flow. Maximum northward on-shelf depth averaged velocities are estimated with about 0.15–0.26 ms-1. The flow turns eastward just to the south of Fraser Island and joins the persistent southward EAC flow along the shelf break. The annual mean net cross-shelf outward and inward flow associated with the gyre is about −1.17 ± 0.23 Sv in the north and 0.23 ± 0.13 Sv (1 Sv = 106 m3s−1) in the south. Mean seasonal water renewal time scales of the continental shelf are longest during austral winter with an average of about 3.3 days due to the Fraser Gyre retaining water over the shelf, however, monthly estimates range from 2 to 8 days with the longer timescale during the austral autumn and winter. The southerly wind during austral autumn and winter is identified as controlling the on shelf circulation and is the principal driver of the seasonally appearing Fraser Gyre. The conceptual model of the Fraser Gyre is consistent with general physical principals of the coastal shelf circulation. A southerly wind is associated with surface layer flow toward the coast, a near coast positive SSHa with a current in the direction of the wind, down-welling and export of shelf water. The Fraser Gyre influenced cross-shelf exchanges are possibly facilitating the offshore transport of fish larvae, sediments, nutrients, river discharges, and other properties across the shelf break and into the southward flowing EAC during the austral autumn and winter.

Recent invasion of European red foxes (Vulpes vulpes) on to Fraser Island (K'gari) and South Stradbroke Island

AbstractInvasive predators are globally significant drivers of threatened fauna population decline and extinction, and the early detection of new incursions is critical to the chances of successful predator eradication and fauna conservation. Here, we provide evidence of the recent invasion of European red foxes (Vulpes vulpes) on to two large and internationally significant islands off the southeast coast of Queensland, Australia – Fraser Island (K'gari) and South Stradbroke Island. From camera trap footage collected on Fraser Island since 2009, foxes have now been observed on seven different occasions between 2012 and 2016. Two scats collected on South Stradbroke Island in 2013 and 2014 tested positive for fox DNA (and negative for Canis spp. DNA), with fox presence confirmed by subsequent camera trap footage in 2016. These data confirm the recent incursion of foxes on to these islands and suggest that small populations now exist there. Fraser Island and South Stradbroke Island represent key RAMSAR wetland areas of refuge for populations of multiple threatened fauna that have never been previously been exposed to foxes. Fox impacts on these fauna can only be expected to increase without management intervention to eradicate them before they become widespread.

Utilising aversive conditioning to manage the behaviour of K’gari (Fraser Island) dingoes (Canis dingo)

K’gari (Fraser Island) offers a rare opportunity for people to observe and encounter wild dingoes. Occasionally, however, such encounters can entail dingoes acting in a threatening or aggressive manner towards people, resulting in human injury and, in one tragic case, death. A suite of approaches aimed at minimising the risk to human safety posed by dingoes have been implemented on the island, including fencing, island-wide warning signage, and regulations against feeding. Despite such measures, negative encounters continue, and in cases where dingoes are deemed to pose an unacceptable risk, they are usually destroyed. In searching for non-lethal management alternatives, attempts have been made to modify undesirable dingo behaviour through aversive conditioning, but results to date have either been mixed or largely disappointing. Here we review a wide array of research that has utilised aversive stimuli in an effort to modify and manage the behaviour of wild animals, with a particular focus on related predators such as coyotes and wolves. We identified eight major categories of experimental research: conditioned taste aversion/avoidance (CTA), electric fencing, fladry, chemical repellents, fear-evoking stimuli, physical repellents, aversive collars/devices and hard release procedures. We then outline each of these categories in more detail, complete with pertinent examples of successes and failures as well as advantages and disadvantages. We conclude that some approaches offer promise within three main areas of incident mitigation experimentation: dingo exclusion (e.g. electric fencing), personal protection (mild chemical irritant sprays, sturdy umbrellas) and remedial aversive conditioning (e.g. shock collars). Other approaches, such as CTA and sublethal projectiles are not recommended. Like any approach, aversive conditioning is not a panacea, but it does offer promise in filling gaps in current management and as an alternative to lethal control.

Preliminary observations of dingo responses to assumed aversive stimuli

Occasionally, interactions between dingoes (Canis dingo) and people on Fraser Island result in serious injury, and, in one case, death. The risk to human safety from such interactions may be mitigated if people could carry a suitably defensive repellent, similar in principle to bear (Ursus spp.) repellent spray advocated in North America. In the first step towards searching for suitable stimuli that might be used as repellents with dingoes, we observed the responses of nine dingoes to three stimuli during interactions with a researcher on Fraser Island. Two treatment stimuli were assumed to be potentially aversive (an air horn blast and a water jet from a motorised water pistol), and one was considered unlikely to be aversive and therefore suitable as a control (a whistle being blown). Responses to the stimuli varied. All nine dingoes were initially presented with the whistle; however, only one adult male responded as if the whistle was aversive. Seven of the nine dingoes were later presented with a whistle and treatment stimuli together. None of the seven dingoes were repelled during any air horn treatment trials; however, six of seven dingoes (all juveniles) were repelled by the water pistol stimulus. Although a water pistol was effective at repelling young dingoes on many occasions, responses between individuals were inconsistent. Results from this pilot study suggest that a water pistol stimulus may offer some protection as a repellent to close approaches by young dingoes, particularly if enhanced with a mild irritant.