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P 0 I I Opinion is intended to facilitate communication between reader and author and reader and I I reader. Comments, viewpoints or suggestions arising from published papers are welcome. N Discussion and debate about important issues in ecology, e.g. theory or terminology, may I I also be included. Contributions should be as precise as possible and references should be P 0 kept to a minimum. A summary is not required. o N
Perrin et al. (Fri,) studied this question.