Plant competition in a changing world

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Uncovering processes that underpin competitive ability of plants in changing environmental conditions.

Global change can have a significant impact on species diversity, with recent advances in coexistence theory allowing us to better understand how drivers can influence species coexistence. Andropogon gayanus (gamba grass) is an alien C4 perennial grass that has transformed diverse, mixed tree-grass savanna ecosystems into dense monocultures in north Australia. European beech and sycamore maple seedlings have different strategies for avoiding competition for nitrogen, with beech having a greater competitive ability.

Plastic root-foraging responses are an adaptive trait, and invasive species have stronger root-foraging responses than non-invasive species. Variation in chemical composition was detected between organs and root exudates of canola genotypes, with 14 secondary metabolites being identified. Urban plantings have the potential to contribute significant ecological values, such as increased urban habitat for animals and increased plant productivity.

  • Global change can influence species coexistence and species diversity.
  • Andropogon gayanus has a competitive advantage due to its high PNUE.
  • European beech has a greater competitive ability for nitrogen than sycamore maple.
  • Invasive species have stronger root-foraging responses than non-invasive species.
  • Variation in chemical composition was detected between organs and root exudates of canola genotypes.
  • Urban plantings can contribute significant ecological values.
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