Lec 15 Bild 3 2011

Lec 15 Bild 3 2011 - Reminders: -Field trip extra credit is...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Reminders: -Field trip extra credit is DUE by December 1 (the last lecture day) -CAPE open from Monday, 11/21 to 12/5 -Please pay attention for the email that will come with your personalized link to evaluate this class and please evaluate this class. Thank you!!! -CAPE scores: influence who will teach this class help me improve my teaching -Final exam reminders
Background image of page 1

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

View Full DocumentRight Arrow Icon
Question from student: What are the benefits to parents for yielding a successful reproduction? Why would parents ever produce children since it’s so costly? Why do fish want to reproduce if they are going to just die right after? Why would they care if their offspring are successful?
Background image of page 2
BILD 3 Lecture 15 - Community Ecology I. Ecological niche II. Interspecific competition III. Consumption IV. Mutualism V. Trophic structure
Background image of page 3

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

View Full DocumentRight Arrow Icon
I. Ecological niche A niche is a summary of an organism’s tolerances and requirements. Niche : n-dimensional hypervolume defined by axes that represent the different environmental tolerances and resource requirements of a species.
Background image of page 4
I. Ecological niche Fundamental niche : the full range of conditions under which a species can survive and reproduce Realized niche : portion of fundamental niche that a species can actually occupy as a result of its interactions with other species Moisture
Background image of page 5

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

View Full DocumentRight Arrow Icon
The niche concept originated from insights Joseph Grinnell published about the distribution of the California Thrasher in 1917 Grinnell considered a niche to be a subdivision of a particular habitat Within the California Floristic Province California Thrashers are restricted to dense vegetation (mostly chaparral and sage scrub)
Background image of page 6
(a) different plant species (b) sand shrimp (c) hypothetical aquatic organism
Background image of page 7

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

View Full DocumentRight Arrow Icon
Types of biotic interactions A benefits B harmed Predator-prey Host-parasite A benefits B unaffected Commensalism A benefits B benefits Mutualism A harmed by B B harmed by A Competition
Background image of page 8
II. Interspecific Competition - different species compete for a particular resource that limits growth or survival - limiting resources include light, space, and nutrients - note that intraspecific competition involves similar processes - competition can decrease population growth rates
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/16/2012 for the course BILD 3 taught by Professor Wills during the Fall '07 term at UCSD.

Page1 / 40

Lec 15 Bild 3 2011 - Reminders: -Field trip extra credit is...

This preview shows document pages 1 - 10. Sign up to view the full document.

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