Agricultural lands are hot-spots for annual runoff polluting the southern Great Barrier Reef lagoon     

Robert Packett  Cameron Dougall  Ken Rohde 《Marine pollution bulletin》2009,58(7):976-986

The world’s largest coral reef ecosystem, the Great Barrier Reef (GBR), continues to be degraded from land-based pollution. Information about the source of pollutants is critical for catchment management to improve GBR water quality. We report here on an 11-year source to sea study of pollutant delivery in runoff from the Fitzroy River Basin (FRB), the largest GBR catchment. An innovative technique that relates land use to pollutant generation is presented. Study results indicate that maximum pollutant concentrations at basin and sub-catchment scales are closely related to the percentage area of croplands receiving heavy rain. However, grazing lands contribute the majority of the long-term average annual load of most common pollutants. Findings suggest improved land management targets, rather than water quality targets should be implemented to reduce GBR pollution. This study provides a substantial contribution to the knowledge base for the targeted management of pollution ‘hot-spots’ to improve GBR water quality.  相似文献   

Harvest patterns and effort dynamics of indigenous and non-indigenous commercial sectors of the eastern Torres Strait reef line fishery     

Ashley J. Williams  Aaron C. Ballagh  Gavin A. Begg  Cameron D. Murchie  Leanne M. Currey 《Continental Shelf Research》2008

The reef line fishery (RLF) in eastern Torres Strait (ETS) is unique in that it has both a commercial indigenous sector and a commercial non-indigenous sector. Recently, concerns have been expressed by all stakeholders about the long-term sustainability of the fishery. These concerns have been exacerbated by the lack of detailed catch and effort information from both sectors, which has precluded any formal assessment of the fishery. In this paper, we characterise the harvest patterns and effort dynamics of the indigenous and non-indigenous commercial sectors of the ETS RLF using a range of data sources including commercial logbooks, community freezer records, voluntary logbooks and observer surveys. We demonstrate that bycatch is a significant component of the catch for both sectors and identify substantial differences in harvest patterns and effort dynamics between the sectors. Differences between sectors were observed in species composition and spatial and temporal patterns in catch, effort and catch per unit effort. These results highlight the inherent variation in catch and effort dynamics between the two commercial sectors of the ETS RLF and provide valuable information for the development of future assessments and appropriate management strategies for the fishery. The more reliable estimates of harvest patterns and effort dynamics for both sectors obtained from observer surveys will also assist in resolving issues relating to allocation of reef fish resources in Torres Strait.  相似文献   

Subglacial intermediate volcanism at Kerlingarfjöll, Iceland: Magma–water interactions beneath thick ice   总被引：1，自引：1，他引：0  

John A. Stevenson  John L. Smellie  David W. McGarvie  Jennie S. Gilbert  Barry I. Cameron 《Journal of Volcanology and Geothermal Research》2009,185(4):337-351

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X-ray emission from nearby M-dwarfs: the super-saturation phenomenon     

David J. James  Moira M. Jardine  Robin D. Jeffries  Sofia Randich  rew Collier Cameron  Miguel Ferreira 《Monthly notices of the Royal Astronomical Society》2000,318(4):1217-1226

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Ocean yearbook 4: edited by Elisabeth Mann Borgese and Norton Ginsburg Chicago University Press, $49     

Donald Cameron Watt 《Marine Policy》1985,9(2):163-164

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Variable stars in the field of open cluster NGC 6819 – II     

R. A. Street  Keith Horne  T. A. Lister  A. Penny  Y. Tsapras  A. Quirrenbach  N. Safizadeh  J. Cooke  D. Mitchell  A. Collier Cameron 《Monthly notices of the Royal Astronomical Society》2005,358(3):795-812

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A tale of two legal systems: 17th Annual Conference of the Law of the Sea Institute cosponsored by the Fridtjof Nansen Institute,Oslo, Norway, 13–16 July 1983     

Donald Cameron Watt 《Marine Policy》1984,8(1):74-75

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Crisis? What crisis? Displacing the spatial imaginary of the fiscal state   总被引：1，自引：0，他引：1  

Angus Cameron   《Geoforum》2008,39(3):1145-1154

This paper argues that there is an immanent and evolving relationship between the prevailing form of taxation and the economic geographies of the state. Despite this, the geographic significance of taxation has been obscured by the language in which its historic transformation tends to be couched. Prevailing fiscal systems tend to be presented as essentially static – institutionally and spatially fixed and routinely inscribed within the fixed boundaries and territories of the ‘sovereign’ fiscal state. Any threat to, or change in the nature or geography of the fiscal state tends to be couched in terms of ‘crisis’ – of negative and discontinuous change. This paper contends that these related and essentially conservative discourses of fiscal geography mask the degree to which fiscal spaces are both multiple and continuously evolving. More importantly, it argues, this fluidity and multiplicity does not threaten the stability and viability of state form, but it is an essential process in its maintenance and reproduction. Running counter to the prevailing discourse of the ‘national economy’, the practice of fiscal geography is an under-analysed but key aspect of the historical evolution and transformation of the imagined geographies of economies.  相似文献   

The development of a non-linear autoregressive model with exogenous input (NARX) to model climate-water clarity relationships: reconstructing a historical water clarity index for the coastal waters of the southeastern USA     

Lee  Cameron C.  Sheridan  Scott C.  Barnes  Brian B.  Hu  Chuanmin  Pirhalla  Douglas E.  Ransibrahmanakul  Varis  Shein  Karsten 《Theoretical and Applied Climatology》2017,130(1-2):557-569

Theoretical and Applied Climatology - The coastal waters of the southeastern USA contain important protected habitats and natural resources that are vulnerable to climate variability and singular...  相似文献   

Palynofacies, coal petrographic facies and depositional environments: Amphitheatre formation (Eocene to Oligocene) and Ravenscrag Formation (Maastrichtian to Paleocene), Canada     

Arthur R. Sweet  Alexander R. Cameron 《International Journal of Coal Geology》1991,19(1-4)

Low rank coals from two disparate geological settings have been subjected to petrographic and palynological analysis. The stratigraphic units studied and their locations are the Amphitheatre Formation, St Elias Mountains, Yukon Territory, of Eocene to Oligocene age; and the base of the Ravenscrag Formation, south-central Saskatchewan, of latest Cretaceous to earliest Paleocene age.The depositional setting of the Amphitheatre Formation ranges from distal sand-dominated braided stream and lacustrine environments to proximal gravel-dominated fluvial environments. The coals are low in inertinite (< 6%) and mostly high in huminite (> 85%). In localities with a dominance of angiosperm pollen the relative abundance of eu-ulminite B and densinite is greatest whereas in the ones with a dominantly coniferous pollen assemblage eu-ulminite A is the most prominent maceral. These observations suggest as an immediate cause/effect relationship, an at least partial dependance of present maceral content on floral precursors. This in turn probably reflects a certain combination of depositional environment conditions (pH, Eh, temperature, etc.), that likely controlled the plant community and the preservation of vegetal matter.The depositional environment of coals from the basal part of the Ravenscrag Formation contrasts sharply with that of the Amphitheatre. The Ravenscrag coals formed within a low energy, stable, floodplain environment. Palynological and coal maceral profiles for the basal Ravenscrag Formation coal, which spans the Cretaceous-Tertiary boundary, indicates that the environment of deposition progressed from an open canopied swamp forest with areas of open water, through a phase of low-lying to open water swamps with herbaceous, pterophytic vegetation to, at least locally, raised bogs. The change in coal petrography across the Cretaceous-Tertiary boundary is shown to be relatively minor in comparison to subsequent changes in coal petrography in the earliest Paleocene and to changes that occur in the palynological assemblages across the boundary interval.  相似文献