Lewis Alcott

Lewis Alcott

Profile

I am a PhD student based in the Earth Surface Science Institute at the University of Leeds. I previously graduated with a Masters in Geoscience in the subjects of Geology with Physics. My research focuses on the interplay between the Earth system and the biosphere over the Great Oxygenation Event. My key interests lie within the relationships between the Earth system and the biosphere. Linking the controls on the evolution of organisms and the Earth as a whole through time by applying modern and ancient analogues to a variety of environments. Primarily what the dynamics are which manage both realms and how they each play their own part

 

Memberships:

Geochemical Society - Student Member

European Association of Geochemistry - Student Member

 

Undergraduate practical demonstrating:

SOEE 1485 Mathematics for Earth, Environmental and Geographical Scientists

SOEE 1570 Geology 1 (Palaeontology)

SOEE 2145 Palaeoecology, Palaeobiology and Evolution

SOEE 2010 Chemistry of the Earth

SOEE 3287 Catchment Processes and Management

 

 

 

 

Research interests

The Great Oxidation Event (~2.4 Ga - 2.2 Ga) induced a series of events which are heavily studied within Earth Science. This rise in oxygen to a few percent of modern day levels is believed to have been caused and controlled by a variety of factors. The evolution of oxygenic photosynthesis and its development is believed to have been a key driver in this increase along with changes in the Earth System during this critical and dynamic time period.

This major increase in oxygen ties with one of Earth's first major glaciations. This snowball Earth event alone would have disrupted and effected the steady systems established and developing over this time.

The Lomagundi carbon isoptope excursion (~2.1 Ga) is also believed to have been a result in this rise in oxygen. Possibly from an increased nutrient input to cause drastic boosts in primary productivity across the globe.

This relationship of the Earth system with the biosphere has lead to several hypothesis justifying the GOE's cause, timing and effects. The bioavailability of nutrients depends not only on the supply to the oceans via weathering but also the behaviour of nutrients within the water column under the ever changing redox conditions during this period. Developing a greater understanding of phosphorus and trace element bioavailability over this major period in Earth history can potentially enhance our ability to decipher feedbacks to early planetary oxygenation.

 

I am funded by the Leeds Anniversary Research Scholarship

Qualifications

  • PhD Student 2016 - Present
  • MGeoSci Geology with Physics (2011 - 2015) Keele University

Research groups and institutes

  • Earth Surface Science Institute
  • Cohen Geochemistry
  • Palaeo@Leeds