1 Habitat Habitat is the _______a plant or animal ______ out there life. Habitat is the _______a plant or animal ______ out there life. copyright cmassengale

2 Niche Niche Niche- ______ of a species in its habitatNiche- ______ of a species in its habitat –Like different baseball player positions A species' niche includes:A species' niche includes: –a. ___________ - where it lives in the ecosystem –b. _______________ - all interactions with other species in the ecosystem –c. _____________- its method of obtaining food. 11

Two species can share the same ________but not the same ______ Example: Ants and bacteria both live in the dirt (habitat) but have different niches. Ants eat dead insects and bacteria eat dead leaves, dead logs, and animal waste. So ants and bacteria don’t compete for the same _________.

4 No __ ______ can _______ the ________ ________ at the same time. This would lead to __________. The Competitive Exclusion Principle says that…

5 Community Interactions 1. ____________ 2. ____________ 3. ____________

6 COMPETITION * OCCURS WHEN ORGANISMS ATTEMPT TO USE SAME _____________ (FYI…resources : _____, ________, or _____)  creating A WINNER AND A LOSER * COMPETITIVE EXCLUSION PRINCIPLE- NO TWO SPECIES CAN OCCUPY ___________ _______________

2 Kinds of Competition ______________ Competition Within a population (__________species) _____________ Competition Between populations ( ___________species) Lion vs. Hyena Buck vs. Buck

8 ________ Predator and prey relationships affect _______ ________ and _________ Predator = organism that kills and eats; the ______ Prey = food; the ______________ 32 The relationship between predator and prey

So… What will happen …? 1… to the prey population, if the predator population increases? 2… to the prey population, if the predator population decreases? 3… to the predator population, if the prey population increases? 4… to the predator population, if the prey population decreases? 1… the prey population will _____________. 2… the prey population will _____________. 3… the predator population will ____________. 4… the predator population will ____________.

10 Symbiosis Organisms of 2 _________ _______ permanently “ _____________”Organisms of 2 _________ _______ permanently “ _____________” 3 Types3 Types 1. __________ 1. __________ 2. __________ 2. __________ 3. __________ 3. __________ Lichens- symbiotic relationship between __________ & _______

11 Mutualism _________ species ________ Ex- ____________ and Sea Anemone

12 Commensalism Ex- Whale and BarnacleEx- Whale and Barnacle One member _________ and the other is ____ helped or harmed. 30

13 Parasitism one organism _________ and the other is __________. Ex: Dog and a _____ predation parasitism Difference between predation and parasitism... -Parasitism acts _________ -Parasites can’t benefit from dead hosts

Let’s Review 1.What kind of symbiotic relationship does a lichen exhibit? 2.Identify 2 organisms that have a predator/prey relationship? 3.Two male gorillas compete for territory. Is this inter- specific or intra-specific competition? 4.The competitive exclusion principle says that no 2 species can occupy the same _______________. 5.What is the difference between a habitat & a niche? Symbiotic Relationship Beneficial (+) or Detrimental (-) Organism 1 Organism 2 Organism 1 Organism 2 Mutualism Commensalism Parasitism

The diagram to the left represents a tree containing three different species of warbler, A, B and C. Each species occupies a different niche. A fourth species, D, which has the same environmental requirements as species B, enters the tree at point X. Members of species B will most likely A. live in equilibrium with species D B. move to a different level and live with species A or C C. stay at that level but change their diet D. compete with species D for resources