A bat guano deposit in Jamaica recorded agricultural changes and metal exposure over the last >4300 years

Lauren R. Gallant, Christopher Grooms, Linda E. Kimpe, John P. Smol, Wieslaw Bogdanowicz, R. Stefan Stewart, Elizabeth L. Clare, M. Brock Fenton, Jules M. Blais*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

Abstract

Bats are excellent ecological indicators because they are long-lived, globally distributed, and show predictable responses to environmental stressors. Unaltered bat guano deposits, although rare, can serve as environmental archives to reveal changes in dietary patterns over millennial time scales. We inferred changes in agricultural and industrial practices using a continuous 4300-year-old bat guano deposit from Jamaica. Cadmium, mercury, lead, and zinc increased during the Industrial Revolution, (which began in ca. 1760), a period characterized by elevated emissions of metals to the atmosphere. Beginning in the early 20th century, decreases in 206Pb/207Pb isotopes tracked the history of leaded gasoline use. Metal concentrations in the bat guano deposit exceeded those recorded in two nearby lake sediment cores from Jamaica. Carbon, nitrogen, and sulfur stable isotope profiles in bat guano tracked the agricultural history of Jamaica, specifically the introduction of nitrogen fertilizers, sugarcane, and possibly fungicides. Bat populations are under stress globally, and such intact guano deposits provide potentially critical information on long-term changes in their food source and exposure to metals.

Original languageEnglish
Article number109470
Number of pages7
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume538
Early online date18 Nov 2019
DOIs
Publication statusPublished - 15 Jan 2020

Keywords

  • Cadmium
  • Carbon
  • Isotopes
  • Lead
  • Mercury
  • Nitrogen

Fingerprint Dive into the research topics of 'A bat guano deposit in Jamaica recorded agricultural changes and metal exposure over the last >4300 years'. Together they form a unique fingerprint.

  • Cite this

    Gallant, L. R., Grooms, C., Kimpe, L. E., Smol, J. P., Bogdanowicz, W., Stewart, R. S., Clare, E. L., Fenton, M. B., & Blais, J. M. (2020). A bat guano deposit in Jamaica recorded agricultural changes and metal exposure over the last >4300 years. Palaeogeography, Palaeoclimatology, Palaeoecology, 538, [109470]. https://doi.org/10.1016/j.palaeo.2019.109470