University of Technology, Sydney. Faculty of Science. / Global climate change is leading to the rise of ocean temperatures and is triggering mass coral bleaching events on reefs around the world. This involves the expulsion of the symbiotic dinoflagellate algae, known as zooxanthellae, from the coral host. Coral bleaching is believed to occur as a result of damage to the photosynthetic apparatus of these symbionts, although the specific site of initial impact is yet to be conclusively resolved. This thesis examined a number of sites within the light reactions of photosynthesis and evaluated the efficiency of photoprotective heat dissipating pathways. Upon expulsion, the capacity for long-term survivorship of expelled zooxanthellae in the water column was also assessed. A reduction in photosystem II (PSII) photochemical efficiency during exposure to elevated temperature and high light (bleaching conditions) was found to be highly dependent upon the increase in abundance of QB non-reducing PSII centres (inactive PSII centres), indicating damage to the site of the secondary electron acceptor, QB, resulting in a limited capacity for its reduction. Therefore, this reduced the rate of the reoxidation of the primary electron acceptor, QA-. Fast induction curve (FIC) analysis of the rise from minimum fluorescence to maximum fluorescence revealed a lower amplitude in the J step along this curve, which was consistent with a reduction in the rate of QA reoxidation. This photoinhibition of PSII was found to occur once the effectiveness of excess energy dissipation through energy-dependent quenching and state-transition quenching was exceeded, suggesting that these mechanisms were incapable of preventing photodamage. Antenna size heterogeneity showed little change under bleaching conditions with a significant increase in PSIIbeta only apparent in one species of coral. The thermostability of the oxygen evolving complex (OEC) and thylakoid membrane were found to increase during exposure to bleaching conditions and exceeded bleaching thresholds of corals. This rapid rise in temperature-dependent thermostability also occurred over seasons, where variation in ocean temperatures was matched by gradual shifts in OEC and thylakoid membrane thermotolerance. Variation in thermostability between species was not found to be linked to zooxanthellae genotype, and instead was related to the bleaching susceptibility of the host. Despite this capacity for resilience to bleaching conditions, the PSII reaction centres did not exhibit such a mechanism for rapid acclimatisation. Corals can only be as tolerant to bleaching conditions as their most sensitive component allows. The formation of nonfunctional PSII centres is therefore suggested to be involved in the initial photochemical damage to zooxanthellae which leads to a bleaching response. Zooxanthellae were found to be expelled irrespective of OEC function and thylakoid membrane integrity, as these sites of the photosynthetic apparatus were still intact when cells were collected from the water column. Although zooxanthellae were photosynthetically competent and morphologically intact upon expulsion, their longevity in the water column was dependent on the time of expulsion following the onset of bleaching and the ambient water temperatures. The survivorship of these zooxanthellae was restricted to a maximum of 5 days in the water column which suggests that unless expelled zooxanthellae inhabit other environs of coral reefs which may be more favourable for survival, their capacity for persistence in the environment is extremely limited. Chlorophyll a fluorescence measurements are a common tool for investigating photosynthetic impacts to in hospite zooxanthellae of corals. Pathways causing dark-reduction of the plastoquinone pool are shown to be active in corals and affect measurements which require dark-adaptation. Pre-exposure to far-red light was found to be an effective procedure to oxidise the inter-system electron transport chain and ensure determination of the true maximum quantum yield of PSII and accurate FICs. It is concluded that the trigger for coral bleaching lies in the photosynthetic apparatus of zooxanthellae and evidence is presented in support of this impact site not being the OEC or thylakoid membrane.

No description available.

The Lake Heron basin is an intermontane basin located approximately 30 kms west of Mount Hutt. Sediments within the basin are derived from a glacier that passed through the Lake Stream Valley from the upper Rakaia Valley. The lack of major drainage in the south part of the basin has increased the preservation potential of glacial phenomena. The area provides opportunities for detailed glacial geomorphology, sedimentology and micropaleontogical work, from which a very high-resolution study on climate change spanning the Last Glacial Maximum (LGM) through to the present was able to be reconstructed. The geomorphology reveals a complex glacial history spanning multiple glaciations. The Pyramid and Dogs Hill Advance are undated but possibly relate to the Waimaungan and Waimean glaciations. The Emily Formation (EM), previously thought to be MIS 4 (Mabin, 1984), was dated using Be10 to c. 25 ka B.P. The EM was largest advance of the Last Glacial Maximum (LGM). Ice during the LGM was at least 150m thicker than previously thought, as indicated by relatively young ages of high elevation moraines. Numerous moraine ridges and kame terraces show a continuous recession from LGM limits, and, supported by decreasing Be10 ages for other LGM moraines, it seems ice retreat was punctuated by minor glacial readvances and still-stands. These may be associated with decadal-scale climate variations, such as the PDO or early ENSO-like systems. There are relatively little sedimentological exposures in the area other than those on the shores of Lake Heron. The sediment at this location demonstrates the nature of glacial and paraglacial sedimentation during the later stages of ice retreat. They show that ice fronts oscillated across several hundred metres before retreating into Lake Heron proper. Vegetation change at Staces Tarn (1200m asl) indicates climate amelioration in the early Holocene. The late glacial vegetation cover of herb and small shrubs was replaced by a low, montane forest about 7,000 yrs B.P, approximately at the time of the regional thermal maxima. From 7,000 and 1,400 yrs B.P, temperatures slowly declined, and grasses slowly moved back onto the site, although the montane forest was still the dominant vegetation. Fires were frequent in the area extending back at least 6,000 years B.P. The largest fire, about 5,300 yrs B.P, caused major forest disruption. But full recovered occurred within about 500 years. Beech forest appears at the site about 3,300 yrs B.P and becomes the dominant forest cover about 1,400 yrs B.P. Cooler, cloudier winters and disturbance by fire promoted the expansion of beech forest at the expense of the previous low, montane forest. Both the increased frequency of fire events and late Holocene beech spread may be linked to ENSO-related variations in rainfall. The youngest zone is characterised by both a dramatic decline in beech forest and an increase in grasses, possibly representing human activity in the area.

<p> The increased consumption of finite resources threatens the preservation of the environment. Environmental pioneers George Perkins Marsh, Gifford Pinchot, and Aldo Leopold were the first to address this concern in the United States. With this background, environmental sustainability in the United States has become a common consideration for public, private, and government organizations. Many organizations have implemented environmental management systems to handle environmental issues. The purpose of this qualitative case study was to explore what environmental sustainability programs manufacturing firms in West Michigan pursue and their motivation for doing so. Leaders from 13 West Michigan manufacturing companies were interviewed. Research questions addressed the benefits administrators perceive can be gained by adopting environmental sustainability programs, disadvantages in adopting environmental sustainability programs, and what organizations are doing to pursue environmental programs. Cost savings was cited as a major reason for pursuing sustainability programs with the lack of time and resources being the greatest restraint environmental administrators encounter. Company leadership noted that sustainability programs provided their firm a competitive advantage with many Millennial employees preferring companies that manage robust environmental programs. The sustainability strategies identified in this research can be leveraged by firms seeking to implement or improve their environmental programs.</p>

In the past few decades, accountability has become a key concept to assess the role and place of a wide range of trasnational institutions. Such trend can be partially explained by the widespread sense of unaccountability that permeates the legal realm beyond the state. The aim of this thesis is to investigate three particular institutional actors of the Climate Change Regime: the Intergovernmental Panel on Climate Change (IPCC), the Compliance Committee of the Kyoto Protocol (CCKP), and the Clean Development Mechanism (CDM). This investigation is carried out through the descriptive and critical lenses of accountability. It resorts to the Global Administrative Law (GAL) project in order to pursue that task. Along the way, the thesis asks four interrelated research questions. The first is conceptual: what is accountability? The second is an abstract normative question: what is regarded as a desirable accountability relationship at the national and the global level? The third is purely descriptive: how accountable are the three institutions? The fourth, finally, is a contextualised normative question: how appropriate are their three accountability arrangements? The two former questions are instrumental and ancillary to the two latter. That is to say, they respectively provide the analytical and evaluative frameworks on the basis of which a concrete description and a concrete normative assessment will be done.

As a global population, inclusive of humans, fauna, and flora, we are each subject, though disproportionality, to the risks associated with our planet’s changing climate. These changes are largely caused by our unabated expulsion of CO2 emissions into the atmosphere. Our globalized world and economic activities have largely engendered the burning of fossil fuels. The 2014 report from the Intergovernmental Panel on Climate Change states that to mitigate the worst effects of climate change, which means keeping warming below 2°C, we need to achieve emissions scenarios relative to pre-industrial levels. Without such reductions we can expect substantial species extinction, increased food insecurity, frequent extreme precipitation events, continued warming and acidification of the ocean, global mean sea level rise, and more frequent and longer lasting heatwaves. Responding to this means collective action at a global level. In my thesis I ask how the novel can respond to and help us to cognise these demands, as well as to cognise the scale and complexities of climate change, its philosophical and physical implications, and to attend to the particularities of local place whist remaining global in its scope and vision. I argue that climate change gives rise to a new form of novel. My work is primarily concerned with eco-fiction and how it can raise consciousness about climate change. I consider that the novel, as a counterfactual narrative, can personalise the issue, create stories so that we have ways to speak about it and enchant us towards an ecological imagining. My thesis begins by discussing the existing genre of popular climate change fiction. This mostly consists of clichéd, post-apocalyptic and hero-orientated disaster narratives. These novels are often predictable and limited in how they can engage the reader with climate change. In my second chapter I look at how climate change affects and alters our language. Certain processes belonging to it lead to a loss of words but also to the production of new words. I examine these themes in Margaret Atwood’s Oryx and Crake (2003), Cormac McCarthy’s The Road (2006), Marcel Theroux’s Far North (2009) and Indra Sinha’s Animal’s People (2007). My third chapter considers how climate change confounds scales and forms of measurement, as it can be invisible, trans-temporal and trans-spatial. I discuss this in reference to John Christopher’s The Death of Grass (1956), Don DeLillo’s White Noise (1984) and Nadine Gordimer’s Get a Life (2005). In my fourth chapter, by close reading of Ian McEwan’s Solar (2010) and Nathaniel Rich’s Odds Against Tomorrow (2013), I suggest how much of our existing climate change discourse has become outworn and fails to prompt critical reflection. In my fifth chapter I argue that particular mitigation strategies and consequences of climate change force us to revise certain epistemologies. I examine how this is represented in Jean Hegland’s Into the Forrest (1995) and Barbara Kingsolver’s Flight Behaviour (2012). In each of these chapters I suggest that creative writing and revising the form of the novel can take account of these aspects and bring climate change into the imagination. In my final chapter I discuss how Amitav Ghosh’s The Hungry Tide (2005) overcomes some of the obstacles associated with representing climate change in the novel. The Hungry Tide’s form, plot and characters are structured by the unique tidal landscape of the Sundarbans, Bengal. Popular fiction typically provides an egocentric account, concerned with the development and interior world of an individual. Yet, they must move towards a more holistic outlook, as found in Ghosh’s example, which can depict the wider interconnections of the nonhuman world. Though climate change is both global in impact and the response it demands, it is particularity with the local that I consider to be essential to eco-fiction. The complexity, wonder and incalculable interconnections and variety owing to place cannot be evoked without such particularity. Therefore climate fiction must balance itself against the broad demands of a global crisis whilst attending to the special character of place and fabric of the local.

<p> This thesis describes how politics shape vulnerability to climate change at the local level, based on an ethnography in Cortez, Florida. Focusing on a &ldquo;traditional&rdquo; commercial fishing village on the Florida Gulf Coast, my research indicates that such vulnerabilities are created at multiple scales of the nexus between governance and commerce. Moreover, a key finding is that, as a community closely linked to the health of local environments, the village in Cortez is largely organized to protect their commercial industry from regional economic overdevelopment; not in recognition of its role in contributing to global climate change, but because such overdevelopment is perceived as unjust and destructive to local environments. Further, through qualitatively examining the environmental values of a &ldquo;traditional&rdquo; fishing community located in a large metropolitan coastal area, my thesis confronts the responsibility that broader society may have to reevaluate economic growth in effort to truly foster sustainability and justice. Finally, the thesis describes how communities like Cortez may be repositories for locally developed, ecologically grounded resilience strategies, rendering their voice all the more crucial, beyond conventional stakeholder approaches, in public discussions about regional economic development and marine resource management. </p><p>

The recent rapid warming of the planet, driven overwhelmingly by human emissions and activities, represents a novel and dire threat to both human and natural systems. It also constitutes an unprecedented global injustice, with those facing the first and, in many cases, the worst impacts being least responsible for causing the problem: the global poor, other species and future generations. Awakening to such a threat also presents a challenge for ethical deliberation, through provoking deep emotional responses that disturb settled identities. In view of all this, the task of ethical deliberation is urgently required. Yet it is itself vulnerable to being derailed by a variety of coping mechanisms that operate to keep the true scale of the problem below the level of our full attention and prevent the necessary frank assessment of what may be required of us. These largely unconscious protective strategies also open the door to those very emotions being exploited by the cultural, economic and political forces primarily responsible for the crisis in the first place. Hence, superficial and inadequate responses proliferate while many feel paralysed into inaction. In the face of this threat to thought, this project seeks to articulate an identity and stance based on Christian theological resources that opens up new space for ethical deliberation in the face of climate fears. Instead of being paralysed by such fears, this thesis argues that fear can instead illuminate and motivate when it is resituated in the service of love through solidarity with the suffering Christ, the poor and with the whole community of creation.

My thesis is that a recovery of Germain Grisez’s theological ethics in relation to the environment and the application of his conservative Catholic methodology to climate change can yield a novel and significant contribution to Catholic theological reflection on this central challenge in an age of ecological crisis. This thesis argues that climate change and the wider ecological crisis are ‘signs of the times’—and hence are appropriate issues for Catholic theological reflection—both in principle and on the basis of their classification as such within the authoritative teaching of the Church’s magisterium. The scientific evidence for the phenomenon of anthropogenic global warming is robust and the UNFCCC establishes a collective legal obligation to deliver a greenhouse gas abatement strategy rigorous enough to prevent ‘dangerous anthropogenic interference with the earth’s climatic system’. This thesis questions both the assumption of endemic anthropocentricism in the Judeo-Christian tradition and the critical-revisionist methodology adopted by a number of ecotheologians in relation to Vatican teaching on the basis of this assumption. This thesis proposes an alternative approach to reflection on ecological issues employing a conservative Catholic theological method exemplified in the work of Germain Grisez. This thesis proposes a rereading of Grisez’s natural law through the lens of his creation theology that reveals an important and hitherto overlooked resource for environmental ethics. Although Grisez himself does not address the climate challenge in his published work, this thesis shows that his ecological insights are pertinent to the issue and application of his theological method can contribute constructively to the wider project of confronting the climate crisis from a Catholic perspective. This thesis further argues that Grisez’s reconstruction of natural law is viable, in that it represents one philosophically cogent solution to the naturalistic fallacy, and that neither his choice of this solution nor his divergence from Classical Thomism compromise the construction of a ‘Grisez School environmental ethics’. In addition, his natural law has the virtue of catholicity in its capacity to contribute to ecumenical and secular debates necessary to the resolution of the climate crisis.

<p> The objective of this research was to investigate the role of land cover changes through time in influencing spatial variability of the surface urban heat island of the metropolitan area of Reno-Sparks, Nevada. Free and widely available thermal data from Landsat 7 ETM+ (Enhanced Thematic Mapper Plus) sensor was gathered for a period between 2004 and 2017 and processed to at-satellite surface temperature. Using parcel data and the National Land Cover Database, the time series of Landsat data was sampled for areas which had undergone development during that time. This sample was cross-validated with ten iterations of equal sample size, with a mean correlation coefficient of 0.623 (standard deviation of 0.008) versus the model&rsquo;s value of 0.624. A set of generalized linear models was conducted on this sample to determine expected temperature change with land cover class. It was found that recently developed regions within Reno-Sparks are 0.6 &deg;C warmer on average than the undeveloped desert grasses and sage. When wetlands/irrigated greenery were converted to impervious surfaces, it resulted in a positive surface temperature change of over 2 &deg;C. Once developed, no significant difference was found in the surface temperature trends. This research, using remote sensing technologies, has shown that the Reno-Sparks surface urban heat island has undergone local, but measurable growth in the last fourteen years.</p><p>