13 research outputs found
Differentiation of Cone and Rod Response in the Human ERG by Means of Colour Frequency Characteristics
No full textMagnetic resonance imaging of renal transplants: its value in the differentiation of acute rejection and cyclosporin a nephrotoxicity
No full textMAGNETIC-RESONANCE IMAGING OF RENAL-TRANSPLANTS - ITS VALUE IN THE DIFFERENTIATION OF ACUTE REJECTION AND CYCLOSPORIN-A NEPHROTOXICITY
No full textMAGNETIC-RESONANCE IMAGING OF RENAL-TRANSPLANTS - ITS VALUE IN THE DIFFERENTIATION OF ACUTE REJECTION AND CYCLOSPORIN-A NEPHROTOXICITY
No full textIntegration challenges in maritime spatial planning; approaches, science gaps, and communication demands
No full textNo abstracts are to be cited without prior reference to the author.Conveners: Andreas Kannen (Germany), Matt Gubbins (UK), Michael Gilek (Sweden).CM 2016/L:333. Mapping science into management, The CFP connection. Ernesto Jardim, Iago Mosqueira, Finlay Scott, Chato Osio, John Casey, Maurizio Gibin, Norman Graham, Ken PattersonCM 2016/L:437. Assessing the significance of fishing and natural disturbance at local scales. S.F. Walmsley, R. Blyth‐Skyrme, D. Rodmell, W. Lart, P.S. Weller, N.K. Dewey, D.O. Lambkin, F.G. O’NeillCM 2016/L:667. Developing an estuarine planning support system: a case study for the Humber Estuary, Eastern England. Jemma‐Anne Lonsdale, Mike Elliott, Keith WestonCM 2016/L:570. Ecosystem based approach in MSP development – Latvian case study. Solvita Strake, Ingrida Purina, Madara AlberteCM 2016/L:91. Helping fishers to reduce discards, a spatial approach. Maria Grazia Pennino, Raul Vilela, Xulio Valeiras, Jose M. BellidoCM 2016/L:620. Identifying risk and opportunities resulting from multiple activities under a changing climate: A case study in the South and East Marine Plan Areas, UK. Silvana Birchenough, Simon Jude, Andrew Gill, Stephen Dye, Paul Buckley, Bryony Townhill, John, K. PinnegarCM 2016/L:114. Individual Stress Level Analyses (ISLA) communicate impact of spatial management options on national or local fisheries communities to decision makers. Torsten Schulze, Katell Hamon, Katharina Schulte, Francois Bastardie, Niels HintzenCM 2016/L:586. Integrating effective fisheries consultation in marine spatial management. Andrew Minkiewicz, Richard RobinsCM 2016/L:210. Integrating Quality Management into the Maritime Spatial Planning processes,Estonian case. Robert Aps, Mihhail Fetissov, Madli Kopti, Henn OjaveerCM 2016/L:241. Integration in Baltic Sea MSP, What role does it really play?. Fred Saunders, Michael Gilek, Björn Hassler, Ralph Tafon, Kira Gee, Jacek ZauchaCM 2016/L:604. Interpolating fishing vessel tracks to improve representation of the use of marine space by commercial fisheries in marine spatial planning. Maîly Billet, Andronikos Kafas, Bruce Buchanan, Ian Davies, Matt Gubbins, Coby Needle, Beth ScottCM 2016/L:186. Marine spatial planning as a tool to enable adaptive governance, implications for practice and evaluation. Lucy GreenhillCM 2016/L:447. Ocean-scape designing by vectors of citizen's consciousness: a practical case study from the Tokyo Bay of Japan. Hiroaki Sugino, Nobuyuki Yagi, Yutaka MichidaCM 2016/L:592. Opportunities for improving inclusion of fisheries-based knowledge in marine spatial management practices. Anne Hawkins, Andrew MinkiewiczCM 2016/L:156. Quality of cross-border collaboration in maritime spatial planning – an evaluation framework. Riku Varjopuro, Gunnar Lindberg, Janne Rinne, Heidi LuseniusCM 2016/L:588. Role of MSP in securing investments in offshore wind: application of process quality management tool. Ivana LukicCM 2016/L:575. Spatio-temporal modelling of fishing effort pattern after displacement due to offshore wind developments using INLA. A. Kafas, J. B. Illian, I. M. Davies, B. E. ScottCM 2016/L:645. The Celtic Seas Partnership. Penny WilsonCM 2016/L:562. The risks of ignoring culture ecosystem services from marine planning. Rachel Shucksmith, Charlotte SlaterCM 2016/L:619. Towards integration and transnational collaboration in Baltic Marine Spatial Planning – Lessons learned from the Baltic Scope project. Andrea Morf, Alberto Giacometti, Michael Kull, John MoodieCM 2016/L:360. Using Species Distribution Models to predict king scallop (Pecten maximus) distribution along the East coast of Scotland. Stanley Mastrantonis, Andronikos Kafas, Anne McLay, Lynda Blackadder, Helen Dobby, Laura Williamson, Beth Scott</p
Magnetic resonance imaging in the diagnosis and staging of renal masses: a critical appraisal and comparison with computed tomography
No full text
The ecological role of the suspension feeding bivalve, Austrovenus stutchburyi, in estuarine ecosystems
No full textSuspension feeding bivalves are described as key species in many aquatic ecosystems, where they can influence primary productivity and nutrient dynamics, are food for higher trophic levels, and may be harvested in commercial or recreational fisheries. In many areas where bivalve populations have declined, substantial changes to ecosystem structure and function have occurred. High-density beds of the infaunal suspension feeding bivalve, Austrovenus stutchburyi, are a dominant feature on intertidal flats in many New Zealand estuaries, but populations are declining in some areas, likely due to anthropogenic stressors such as overharvesting and sedimentation. This thesis examines the influence of Austrovenus on estuarine ecosystem function using laboratory, field and modelling studies.
The effects of bed density and flow speed on boundary layer dynamics and Austrovenus clearance rates (CR) were investigated in annular flumes. Bed shear stress increased with increasing bivalve density, and under certain conditions was also increased when Austrovenus were feeding, compared to when they were not. The bed roughness and siphonal currents generated by the bivalves may therefore influence food supply to the bed. Both individual and bed CR were significantly greater at the high flow speed. Bed CR did not scale proportionally with density, in part because individual CR decreased with increasing density, but also because the proportion of bivalves actively feeding decreased at high densities. Thus, scaling up individual CR obtained from animals at low densities will significantly overestimate population filtration capacity.
The effect of Austrovenus on ecosystem function was examined at two sites, one sandy, the other composed of muddy-sand, to determine whether sedimentary environment alters this key species’ role. Gross primary production (likely corresponding to microphytobenthos production) and ammonium uptake were significantly increased, and denitrification potential was also elevated, when Austrovenus was added, relative to removed, at the sandy site. In contrast, there was no effect of Austrovenus on any of these variables at the muddy-sand site. These results reveal the importance of considering sedimentary environment when examining the effect of key species on ecosystem function, and suggest that even moderate levels of sedimentation may reduce the positive effect of Austrovenus on primary productivity.
A food-web model was used to quantify the interactions between Austrovenus and other estuarine species, and to determine the effect of reducing Austrovenus biomass on ecosystem properties. The model revealed an estuarine system dominated by benthic species, characterised as a developing, rather than a mature ecosystem. Detritus production and export were high, while transfer efficiency and internal recycling were low. Decreasing Austrovenus biomass decreased system maturity, suggesting that reductions in Austrovenus populations may decrease ecosystem stability. The model also confirmed that within these estuarine systems Austrovenus and microphytobenthos are key species which impact greatly on all other trophic levels.
This thesis demonstrates that Austrovenus populations exert considerable influence on benthic communities and processes, and play a key role in the functioning of estuarine ecosystems. Reductions in Austrovenus populations will likely negatively impact on microphytobenthos and higher trophic levels, and may also reduce ecosystem maturity and stability
