My research interests are primarily on human influences on aquatic habitats and organisms, particularly the sources, distribution and impacts of microplastic pollution. My approach to this topic is holistic, studying the degradation of macroplastic debris in marine habitats and the distribution of microplastic formed, as well as observing microplastic uptake and its impact in the commercially important langoustine population.
I have also worked on the degradation and impacts of “degradable” and “compostable” plastics in terrestrial environments (establishing the effectiveness and impacts of the novel polymers), have been involved in a number of citizen science projects examining a suit of environmental issues, and on engineering solutions to the problem of microplastic capture.
Welden, N. A., Abylkhani, B., and Howarth, L.M (2018). The effects of trophic transfer and environmental factors on microplastic uptake by plaice, Pleuronectes plastessa, and spider crab, Maja squinado. Environmental Pollution, 239, 351-358
Welden, N.A., Ashmore, M. and Wolseley, P.A. (2018) Citizen science identifies the effects of nitrogen deposition, climate and tree species on epiphytic lichens across the UK. Environmental Pollution, 232, 80-89
Welden, N.A. and Cowie, P.R., (2017). Degradation of common polymer ropes in a sublittoral marine environment. Marine Pollution Bulletin, 118, 248-253
Welden, N.A. and Lusher, A.L., (2017). Impacts of changing ocean circulation on the distribution of marine microplastic litter. Integrated Environmental Assessment and Management, 13, .483-487
Lusher, A., Welden, N.A., Sobral, P., and Cole, M. (2017). Sampling, isolating and identifying microplastics ingested by fish and invertebrates. Analytical Methods. 9, 1346-1360