A millennium of increasing diversity of ecosystems until the mid‐20th century

Ines Santos Martins*, Maria Dornelas , Mark Vellend, Chris D. Thomas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
3 Downloads (Pure)

Abstract

Land-use change is widely regarded as a simplifying and homogenising force in nature. In contrast, analysing global land-use reconstructions from the 10th to 20th centuries, we found progressive increases in the number, evenness, and diversity of ecosystems (including human-modified land-use types) present across most of the Earth’s land surface. Ecosystem diversity increased more rapidly after ~1700CE, then slowed or slightly declined (depending on the metric) following the mid-20th century acceleration of human impacts. The results also reveal increasing spatial differentiation, rather than homogenisation, in both the presence-absence and area-coverage of different ecosystem types at sub-global scales - at least, prior to the mid-20th century. Nonetheless, geographic homogenization was revealed for a subset of analyses at a global scale, reflecting the now-global presence of certain human-modified ecosystem types. Our results suggest that, while human land-use changes have caused declines in relatively undisturbed or ‘primary’ ecosystem types, they have also driven increases in ecosystem diversity over the last millennium.
Original languageEnglish
Number of pages11
JournalGlobal Change Biology
VolumeEarly View
Early online date22 Jul 2022
DOIs
Publication statusE-pub ahead of print - 22 Jul 2022

Keywords

  • Ecosystem diversity
  • Anthropocene
  • Global change
  • Diversity metrics
  • Spatio-temporal
  • Spatial ecology
  • Land-use change

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