I am a lecturer in the Department of Geography, University of Nottingham. I am interested in how rivers work and how environmental conditions and processes provide a dynamic habitat for aquatic organisms.

My contact details are:
M.Johnson@nottingham.ac.uk
Sir Clive Granger Building, University Park, Nottingham, NG7 2RD, UK
www.nottingham.ac.uk/geography/people/m.johnson

I am originally from St.Ives, Cambridgeshire, UK. I graduated from the University of Nottingham in 2005 with a BSc Geography degree. I then undertook an MSc at Loughborough University to link my interests in fluvial geomorphology and ecology. My MSc dissertation focused on the extent to which caddisfly larvae can influence the movement of substrate material by binding together gravel grains with silk. Details of this research can be found under the research tab to the left and it has been published in Earth Surface Processes and Landforms (available here). I subsequently took a year off from academia to work for Greenwillows Associates environmental consultancy, surveying and trapping legally protected species including badgers, great crested newts and reptiles. 

In July 2007, I started a PhD at Loughborough University, supervised by Professor Stephen Rice and Professor Ian Reid. The aim of my PhD was to quantify the impact of signal crayfish on fluvial gravel substrates and to determine how crayfish activity alters the geomorphic, hydraulic and sedimentary processes operating at the  substrate surface. This research involved both laboratory flume and field components, details of which can be found under the research tab to the left. This research has since been published in a number of papers found under the publications tab and was selected for summary as a 'News and Views' article in Nature Geoscience (available here).

From 2011 to 2014, I was involved in a number of research projects as a Post-doctoral Research Associate at Loughborough University. These included working with Prof. Rice as part of the wider, EC-funded, HYDRALAB IV project. I was involved in developing guidelines for the use of living organisms in hydraulic facilities and was involved in compiling and editing a comprehensive critical review of the interaction between benthic organisms and physical processes in aquatic environments (now available here). I also compiled, and now maintain, an online database of academic articles that focus on the modification of aquatic environments by macroinvertebrates, which can be found at the HYDRALAB tab. I also worked with Prof. Rice on a number of projects focused on the interactions between aquatic animals and fluvial environments, and with Professor Rob Wilby on the thermal dynamics of rivers and, in particular, developing simple metrics that could be used to predict the vulnerability of river reaches to future change.

Me catching crayfish (under licence) in a local river with a crayfish trap. Photograph by Loughborough University Photography.

Looking upstream at site D22

The Armfield custom flume with PIV system at Loughborough University, Department of Geography, Hydraulics Laboratory. Experiments on the movement of gravel by signal crayfish were undertaken in this flume.