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Understanding Species Interactions and Their Impact on Communities

This assignment focuses on examining the complex interactions between species within ecosystems, exploring both positive and negative effects. Students are required to read the Owl Pellet lab write-up in preparation for the upcoming tests covering chapters 1-4. The research project, which was due yesterday, will commence presentations on Monday. Key topics include competition, symbiosis, amensalism, and allelopathy, as well as the effects of species like zebra mussels on their environments. Prepare to discuss and critically evaluate these interactions.

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Understanding Species Interactions and Their Impact on Communities

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  1. Do Now: Fun Friday!

  2. Homework & Objective • Objective: Examine the impact of species interaction with one another. • Homework – • Read the Owl Pellet lab write up for Monday. • Review the chapter. Plan for a test on chapters 1,2,3,4 on Tuesday (D Period), Wednesday for E Period. • Research Project – Were due yesterday (the written) presentations will begin Monday.

  3. Species interactions & Community • Zebra Mussels – good or bad? Look at page. 77 • What is the issue? Are they completely bad or do they do offer benefits? If so what?

  4. Species interactions & Community • Competition – Inter Competition & Intra Competition • Inter Competition • Intra Competition • Competitive exclusion • Resource partitioning – woodpeckers • Predator versus Prey

  5. Species interactions & Community Symbiosis – what is it? Are they always good? • Mutualism – each benefits • Commensalism • One benefit and the other is unaffected (Spanish Moss) • Parasite - one benefits the other is harmed

  6. Species interactions & Community • Amensalism– one harmed while the other is unaffected

  7. Species interactions & Community • Turf cutting – Pines trees drop needles which changes the PH and other trees cannot groiw there. This is called: • Allelopathy – plants that release chemicals to protect themselves or their area

  8. Species interactions & Community • Trophic Levels – p. 84 & 85 • Each rise on the level is a loss of energy (through respiration), only a small amount is transferred • Each level is just 10% of energy from the previous level • For every hawk there must be more rodents to eat and even more bugs,..

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