Topic+21.+Succession

Topic+21.+Succession - Topic 21 Succession I Def The...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Topic 21: Succession I. Def: The process by which communities change in species composition over time. II. Example: oak-hardwood forest in Georgia (USA) studied by Odum slide : grassland 1-10 yrs shrubs 10-25 pine forest 25-100 hardwood forest 100+ III. The process does not go on indefinitely, but eventually the climax (Def . last stage in succession ) is reached . A. The climax lasts forever unless an outside disturbance comes along, as often would be the case from humans (e.g. back to fields), and then if agriculture abandoned, reverts to forest eventually. IV. In classical terrestrial succession, a number of changes occur: A. Biomass typically increases with time. slide same oak- pine forest in Long Island B. Productivity (net) increases with time at a decreasing rate; near climax it may or may not decrease a little 1. oak-pine slide still, no decrease 2. Nearby New Hampshire hardwood forest shows decrease slide C. Biomass-to-productivity ratio increases (follows from #s A and B) D. Number of species increases typically. True for birds of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/06/2011 for the course EVE 101 taught by Professor Strong,d during the Fall '08 term at UC Davis.

Page1 / 2

Topic+21.+Succession - Topic 21 Succession I Def The...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online