Thom D. Nickell's research while affiliated with Scottish Association for Marine Science and other places

Publications (4)

Article
The European Union-funded ECASA project (Ecosystem Approach for Sustainable Aquaculture) studied the impacts from aquaculture on ecosystems from northern Norway to Greece. The objectives of this investigation were to identify quantitative indicators of the effects of aquaculture on marine communities, and to assess their applicability over a range...
Article
Following cessation of fish production at a fish farm site in Loch Cretan, Scotland, a study of the recovery of the benthic environment was undertaken. Sediment samples for macrofauna and geochemical parameters (redox potential, organic carbon, oxygen flux) were collected over a period of 15 months from three stations following a gradient of impact...
Article
To validate a resuspension model of particulate material (salmonid farm wastes), a UV fluorescent particle tracer was selected with similar settling characteristics. Tracer was introduced to the seabed (water depth ≈30 m) and sediment samples taken on days 0, 3, 10, 17 and 30 to measure the horizontal and vertical distribution of tracer in sediment...

Citations

... Our results showed that 9 out of the 10 mussel samples from the aquaculture site A exhibited those pathologies, compared to zero in the control area B. Antifouling paints used in open water fish farms are the potential source of Cu pollution. However, Loch Creran has the second greatest mixing depth when ranked against other sea lochs, which results in a 60 % water exchange occurring every 3 days (Wilson et al. 2006). The water mixing can therefore explain the high levels of Cu recorded at both sites. ...
... The combination of deteriorating physical and physiological conditions can lead to the replacement of the macro-fauna with one dominated by small opportunistic species, such as Capitella sp, Mediomastus fragilis and Malacocerus fuliginosus, species which are able to tolerate hypoxic conditions (Pereira et al., 2004;Tomassetti and Porrello, 2005;Bannister et al., 2014;Keeley et al., 2019). Under appropriate conditions such opportunistic organisms may flourish in huge numbers and their abundance is thus often used as an indicator of organic enrichment (Hargrave et al., 2008;SEPA, 2019a). ...
... Resuspension also affects net deposition of waste. A resuspension module in the original version of DEPOMOD (Cromey et al. 2002b) was criticized since a large proportion of released particles was transported outside of the model domain (e.g. Chamberlain & Stucchi 2007, Keeley et al. 2013, Chang et al. 2014a. ...
... It plays an important role in aquatic food-webs, as a significant trophic element between primary producers and higher trophic levels (Woods, 2009;Rogers et al., 2010). Besides their diversity and abundance, benthic macroinvertebrates are considered as a good bio-indicator of environmental conditions (Borja et al., 2009;Forchino et al., 2011;Tomassetti et al., 2016). Therefore, * Corresponding author. ...