Floating plant dominance as a stable state

M. Scheffer, S. Szabo, A. Gragnani, E.H. van Nes, S. Rinaldi, N. Kautsky, J. Norberg, R.M.M. Roijackers, R.J.M. Franken

Research output: Contribution to journalArticleAcademicpeer-review

261 Citations (Scopus)

Abstract

The authors demonstrate that floating-plant dominance can be a self-stabilizing ecosystem state, which may explain its notorious persistence in many situations. Their results, based on experiments, field data, and models (in Dutch ditches and Lake Kariba, Zimbabwe), represent evidence for alternative domains of attraction in ecosystems
Invasion by mats of free-floating plants is among the most important threats to the functioning and biodiversity of freshwater ecosystems ranging from temperate ponds and ditches to tropical lakes. Dark, anoxic conditions under thick floating-plant cover leave little opportunity for animal or plant life, and they can have large negative impacts on fisheries and navigation in tropical lakes. Here, we demonstrate that floating-plant dominance can be a self-stabilizing ecosystem state, which may explain its notorious persistence in many situations. Our results, based on experiments, field data, and models, represent evidence for alternative domains of attraction in ecosystems. An implication of our findings is that nutrient enrichment reduces the resilience of freshwater systems against a shift to floating-plant dominance. On the other hand, our results also suggest that a single drastic harvest of floating plants can induce a permanent shift to an alternative state dominated by rooted, submerged growth forms.
Original languageEnglish
Pages (from-to)4040-4045
JournalProceedings of the National Academy of Sciences of the United States of America
Volume100
Issue number7
DOIs
Publication statusPublished - 2003

Keywords

  • ditches
  • ecosystems
  • salvinia molesta
  • biodiversity
  • lakes
  • netherlands
  • zimbabwe
  • aquatic ecosystems
  • shallow lakes
  • aquatic macrophytes
  • salvinia-molesta
  • long-term
  • shifts
  • vegetation
  • reduction
  • kariba

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