Dr Darren Gröcke is the Director of the Stable Isotope Biogeochemistry Laboratory (SIBL) at Durham University. SIBL has state-of-the-art gas source isotope mass spectrometers that are used for the investigation of archaeological, geological, biological and environmental samples. Darren has worked on a diverse array of subjects from modern kangaroo bones, mammoth diets, black shale formation and plant fertilisation. Darren has written many publications on modern, archaeological and geological studies. Darren has nearly 30 years of isotope experience and over 180 peer-reviewed international publications. SIBL has helped train many PhD, MSc and undergraduate students in isotope geochemistry – many of them continuing an academic career or in environmental consultancy. Over the past eight years Darren has become very interested in macroalgae especially as a tool for monitoring the marine environment. This has culminated in several papers on translocating seaweed, nitrogen isotope labelling of seaweed, and using seaweed to determine sewage pollution on North Atlantic islands.