10 (4).ppt - Population Interactions It is a model It explains the sequence of changes in a community after a disturbance It is the change in species

10 (4).ppt - Population Interactions It is a model It...

This preview shows page 1 - 25 out of 25 pages.

Population Interactions
Image of page 1
Image of page 2
It is a model It explains the sequence of changes in a community after a disturbance
Image of page 3
It is the change in species composition in areas over time These changes will lead to a climax community being formed
Image of page 4
There are two types : 1. Primary succession 2. Secondary succession
Image of page 5
Image of page 6
Begins in a lifeless area where there is no soil E.g. Rocks Volcanic island The moraine left behind as a glacier retreats.
Image of page 7
The first species to colonies the area is called the pioneer community It is hardy E.g. mosses or lichens, grasses
Image of page 8
Once soil is present: grasses, shrubs, and trees sprout from seeds carried in from nearby areas
Image of page 9
Image of page 10
Occurs where an existing community has been removed by a disturbance E.g. Clear-cut A fire Land slide The soil is left intact
Image of page 11
Image of page 12
Image of page 13
The dominant plant species have been eliminated The soil contains nutrients, organic matter, seeds and
Image of page 14
Image of page 15
Image of page 16
Image of page 17
Image of page 18
Image of page 19
Image of page 20
Image of page 26

You've reached the end of your free preview.

Want to read all 25 pages?

Unformatted text preview: buried roots of vascular plants Small woody plants (shrubs)begin to grow Tree species eventually displace the woody shrubs Is the final stable community created It is in a state of dynamic equilibrium It may take years to reach It is triggered by disturbances Follows a pattern.. smaller species are replaced by larger species The total number of species is high in early succession….and then declines Net productivity is high in early succession….and then levels off Biomass is high in early succession … and then levels off Most communities exist in a state of flux …. a mosaic of different stages of succession Succession is : highly variable often influenced by frequent disturbances Climax community may in fact never be reached Microbial Succession Page 775 #’s 1-7 & 9...
View Full Document

  • Winter '17
  • John Travis
  • Ecological succession, Primary Succession, Small woody plants, pattern.. smaller species

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors