{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Bio Notes Jan 31

Bio Notes Jan 31 - Bio Notes Jan 31 Mandatory Readings Ch...

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

View Full Document Right Arrow Icon
Bio Notes Jan 31 Mandatory Readings: Ch. 22-24 Go over Species-to Species interactions again. - The competitive Exclusion principle- need to know and understand this. The Ghost of Competition Past- Term proposed by J. H. Connell in 1980 to describe one possible reason for observed differentiations in niches. Competing species may be less fit than a species which avoids competing because it occupies a fundamental niche which does not overlap theirs. Natural selection may then favor the non-competing species; its population increases and those of the competing species decrease. The observed differentiation is then the result of past competition and to explain it in this way is to invoke the ghost of competition past. - Keystone Species- Without Pisaster, the ecological diversity decreases astronomically. -Species diversity is much higher in community 1 than in community 2. (In graph) Trophic levels- (Nutrient food) – The first trophic level is one with most biomass, then it goes up hierarchically. The higher you move the pyramid, the less energy is found. At every level, we drop down to ten percent of the previous level. Most energy at bottom, Least energy at top.
Image of page 1

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

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

{[ snackBarMessage ]}

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