Cameron Stuart Fletcher

Cameron Stuart Fletcher
The Commonwealth Scientific and Industrial Research Organisation | CSIRO · Land & Water Flagship

PhD

About

52
Publications
6,524
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896
Citations
Introduction
I make models that describe how people, collectively, interact dynamically with the natural environment.

Publications

Publications (52)
Article
The reduction in property values following a major flood event is significant to individuals, communities and governments alike. Property owners who purchase properties just before a major flood risk significant personal loss on their largest single asset. The costs of a major event are shared across communities through government funded recovery e...
Article
Full-text available
On the iconic Great Barrier Reef (GBR), the cumulative impacts of tropical cyclones, marine heatwaves and regular outbreaks of coral-eating crown-of-thorns starfish (CoTS) have severely depleted coral cover. Climate change will further exacerbate this situation over the coming decades unless effective interventions are implemented. Evaluating the e...
Technical Report
Full-text available
The NESP COTS Regional Scale Modelling work aimed to build on two existing advanced coral-COTS community models (CoCoNet and ReefMod-GBR) which have been widely tested and used on the GBR. The goal of this work was to incorporate descriptions of the management processes implemented in the Expanded COTS Control Program, and to assess the performance...
Article
Full-text available
Crown-of-thorns starfish (COTS) outbreaks are a globally significant driver of coral mortality in the Indo-Pacific and work synergistically with other disturbances. We argue that our improved understanding of COTS ecology and ability to monitor their populations, combined with new efficiencies in COTS control technologies, provides a sound basis fo...
Article
Full-text available
Population outbreaks of Crown-of-Thorns Starfish (COTS; Acanthaster spp.) are a major contributor to loss of hard coral throughout the Indo-Pacific. On Australia's Great Barrier Reef (GBR), management interventions have evolved over four COTS outbreaks to include: (1) manual COTS control, (2) Marine Protected Area (MPA) zoning, and, (3) water quali...
Article
Containment is a frequently advocated strategic objective for countering plant invasions. It is commonly perceived that it is the valid fall-back option when eradication has failed or is deemed impossible with the available resources. We reviewed management and research literature on containment. The lack of a clear, universally accepted definition...
Technical Report
Full-text available
This report outlines an ecologically-informed framework for the management of day-to-day operations of the Expanded Crown-of-Thorns Starfish (Acanthaster cf. solaris, hereafter COTS) Control Program on the Great Barrier Reef. This framework links COTS ecology to Control Program decisions by providing a structured decision process within and amongst...
Article
Safety considerations for researchers shape ecological research approaches in dangerous aquatic environments. A series of recent studies has demonstrated that the moray Gymnothorax polyuranodon (Family Muraenidae) occupies freshwater in the adult phase. However, its potential use of tidal habitat remains largely unexplored, due partly to the challe...
Article
Full-text available
The movement capacity of the crown-of-thorns starfishes (Acanthaster spp.) is a primary determinant of both their distribution and impact on coral assemblages. We quantified individual movement rates for the Pacific crown-of-thorns starfish (Acanthaster solaris) ranging in size from 75–480 mm total diameter, across three different substrates (sand,...
Technical Report
A property is a bundled good composed of an appreciating asset, land, and a depreciating asset, structure. This study proposes the use of a hedonic based unobserved components approach where land and structure are viewed as two additive components of the price. The underlying trend in each component is identified via mapping each component's intrin...
Article
Full-text available
The distribution of risk of coastal inundation, and the potential benefits of adapting to protect against inundation, vary greatly both within and between coastal communities. This diversity is a result of physical factors, such as the risk of storm surge, sea level rise projections, and the topography of the landscape, as well as socio-economic fa...
Article
Full-text available
Underwater video is increasingly being used to record and research aquatic fauna in their natural environment, and is emerging alongside Dual Frequency Identification Sonar (DIDSON) as a powerful tool in Australian freshwater ecology. We review current progress with field-based applications of underwater video in studying Australian freshwater fish...
Article
In this paper we consider how choices in the econometric approach to impute prices affect the Törnqvist and Jevons hedonic imputed indexes. We compare the rolling window approach to estimation by smoothing methods. The main difference between the rolling window and the smoothing methods is in the way information is weighted. We propose that the Kal...
Article
Australia has one of the lowest population densities in the developed world (ABS 2012) and a long and sparsely populated coastline. Institutional capacity for adaptation at the local government scale is vital in Australia, because it is at this scale that many discussions around adaptation occur and decisions are made. In parallel to the institutio...
Article
Full-text available
Containment can be a viable strategy for managing invasive plants, but it is not always cheaper than eradication. In many cases, converting a failed eradication programme to a containment programme is not economically justified. Despite this, many contemporary invasive plant management strategies invoke containment as a fallback for failed eradicat...
Article
Dispersal of propagules makes invasions a fundamentally spatial phenomenon, and to be effective, management actions to control or eradicate invasive species must take this spatial structure into account. While there is a vibrant literature linking detailed dispersal measurements to the rate of invasive spread, and a separate literature focused on i...
Article
Full-text available
For urban areas already exposed to flooding risk, the prospect of increased population densities and of more frequent extreme weather associated with climate change is alarming. Proactive adaptation, including changes to planning schemes, can reduce the risks faced in such urban areas. However empirical information detailing the benefits of proacti...
Article
Containment is a strategic option that is frequently advocated for dealing with invasive plants. It is often presented as the fall-back option when eradication is deemed unfeasible, notably when eradica-tion attempts are abandoned. However, containment confronts the same needs for detection, delimitation and destruction of plants as eradication. It...
Article
Full-text available
Coastal inundation as a result of global sea level rise and storm surge events is expected to impact on many coastal regions and settlements. The impacts are likely to be exacerbated by ongoing urbanization in coastal environments. Adaptation is widely accepted as an important strategy for managing inundation risk. Adaptation progress in Australia...
Article
Full-text available
Indigenous disadvantage and poverty have persisted and are set to continue into the future. Although a large amount of work describes the extent and nature of indigenous disadvantage and poverty, there is little evidence-based systems understanding of the mechanisms that keep many indigenous people in their current dire state. In such a vacuum, pol...
Article
Monitoring of population trends is a critical component of conservation management, and development of practical methods remains a priority, particularly for species that challenge more standard approaches. We used field-parameterized simulation models to examine the effects of different errors on monitoring power and compared alternative methods u...
Article
Biological invasions are a key threat to natural ecosystems and consequently a major focus of ecological research. Even though it is dispersal processes that result in the movement of invasive populations through landscapes, dispersal ecology has played a relatively minor role in invasion ecology research. This is particularly true for vertebrate-d...
Article
Full-text available
The study develops a spatio-temporal model of hedonic pricing that explicitly separates the land and the structure components of property prices. This is illustrated with a dataset for Brisbane, Australia, constructed by combining commercial real estate, local government databases and GIS-based spatial analyzes. The land component of prices has inc...
Article
Operations research (OR) methodologies in optimization have been extensively applied to problems in different agricultural value chains in recent years. We take a critical stock take of such applications to date, and reflect on their contribution to value chain sustainability and resilience. The stock take shows that the rate of industry or policy...
Article
Fundamentally, plant invasions are about the movement of individuals through an ecosystem. In contrast, management is often focused on killing plants and generally gives little or no consideration to the implications of plant movement for the management strategy adopted or its likely success. This is potentially a mistake, as understanding how inva...
Article
Unwanted plant and animal invasions throughout the world cause large negative impacts through lost natural values, lost productivity, and ongoing management costs. For instance, Australian farmers spent over $1 billion in the 2005-2006 financial year in weed prevention and management alone (Australian Bureau of Statistics). In protected areas aggre...
Article
Full-text available
Miconia calvescens (Melastomataceae) is a serious invader in the tropical Pacific, including the Hawaiian and Tahitian Islands, and currently poses a major threat to native biodiversity in the Wet Tropics of Australia. The species is fleshy-fruited, small-seeded and shade tolerant, and thus has the potential to be dispersed widely and recruit in re...
Conference Paper
The Reef Water Quality Protection Plan aims at ‘halting and reversing the decline in water quality’ entering the Great Barrier Reef (GBR) by 2015. Population growth rates in GBR catchments are, however, amongst the largest in Australia and expected to lead to substantial changes in land use, a subsequent decline in water quality and degradation of...
Article
A generic model is developed that describes the broad properties of land-exploitation systems from hunting-gathering societies to modern, intensive agriculture. The framework includes social, economic and ecological drivers of change, going beyond the concept of “sustainability” to establish a paradigm of “resilient exploitation” that calculates th...
Article
Full-text available
We present techniques that we have developed to operationalize the concept of resilience, as promoted by The Resilience Alliance (www.resalliance.org). We also outline a new program of research applying these techniques across a diverse range of Australian and New Zealand systems to begin operationalizing resilience management wherever humans inter...
Conference Paper
Full-text available
By comparison between experiment and theory, we show how the classical noise on a multi-state atom laser beam increases with increasing flux. Such considerations will be important in future precision measurement techniques utilising atom lasers
Article
Full-text available
By direct comparison between experiment and theory with no adjustable parameters, we show how the classical fluctuations on a multistate atom laser beam increase with increasing flux. The fluctuations are inherent to state changing out coupling, rf, Raman, or otherwise and are likely to be present in all atom lasers, pulsed or continuous, that empl...
Article
Full-text available
We describe the construction and operation of an external cavity diode laser in which the diode is cooled to -45C. This technique allows us to pull the wavelength of a nominally 782nm diode to operate at 766.7nm, a change of over 15nm. The important aspects of our design are its ease and low cost as compared to other designs of changing the operati...
Article
Full-text available
Atom lasers have been demonstrated in both pulsed and semi-continuous modes. The dynamics of these devices is predicted to be dramatically different to the optical laser due to fundamental differences between the two types of boson fields, however to date it is the similarities that have been emphasized. Here we show how the atom laser dynamics are...
Article
We present a novel technique to lock the frequency of the trapping laser of a magneto-optic trap (MOT) using a signal generated from the ultracold atoms in the MOT itself. This technique utilizes the large number of very cold, slow-moving atoms in the MOT to generate a signal free of Doppler-broadening. A system analogous to Pound–Drever–Hall locki...
Article
Full-text available
In this paper, we present the first data from a new double MOT Bose-Einstein condensation (BEC) experiment. To assist new groups in their pursuit of BEC, we present a typical series of absorption images over an evaporative cooling ramp when BEC is reached, and compare this with a second series where the machine fails to reach condensation. All pict...
Article
The properties of a relativistic plasma dispersion function (RPDF) for an intrinsically extremely relativist, strongly magnetized, one-dimensional, electron[right angle bracket] [dbl greater-than sign] 1 in its rest frame, the RPDF has a large peak >[left angle bracket][right angle bracket] below the speed of light, and the asymptotic value (infini...
Article
Full-text available
To date, there have been few attempts to model the dispersal of invasive weeds in rainforests to create predictive simulation models for their management. This may be partly due to the difficulty of describing the movement of vertebrate seed dispersers which are responsible for dispersal of most rainforest plant species, and partly due to a lack of...

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