- Yes 19 years indicates the time that has passed between the first and fourth edition of the textbook.
- This section is talking about "applied ecology" and not ecology as a whole. Applied ecology has come of age as of date of publication of the 4th edition of the textbook (2006).
- Ecology is hard because it deals with an enormous variation in genetics and number of species.
- Ecology is for everyone because every one of us has 'studied' the ecology around him even if on a very basic or superficial level.
- A science for everybody - but not an easy science
- everyone has been an ecologist, oldest science
- evolution only makes sense in light of ecology
- Whitehead's recipe for science: "Seek simplicity, but distrust it."
- diversity of genetics, species
- Ecology is ... population, 3 levels: organisms, interactions among organisms, communities
- Nineteen years on: applied ecology has come of age
- the move towards applications (reflected in 3 chapters, one in each part of the book)
- some things have changed, some have remained fixed
- the cover has changed to reflect such changes
- man as perpetrator
- Does 19 years indicate start of first edition?
- Was ecology not "of age" 19 years ago or does the heading mean the textbook itself has matured?
- Why is ecology hard?
- Why does the author consider ecology to be a difficult science?