An interaction between organisms over a limited resource is called competition.
Competitive exclusion occurs when a superior competitor eliminates the other species from the ecosystem.
Carrying capacity refers to the maximum number of individuals an environment can support.
The spines on a sea urchin would be considered a mechanical defense.
Intermediate sized food is preferred by a forager because it yields the most food per unit time. Larger sized prey has a good reward but it takes relatively long to eat. Smaller sized prey is fast to east but food per prey item is small
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Which of the following is NOT a characteristic of the Phylum Arthropoda:
A) jointed appendages
B) exoskeleton
C) a large muscular foot
D) metamorphosis & molting
Answer - Arthropoda don't have a large muscular foot.
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Which of the following organisms does not belong in the Phylum Mollusca, Class Gastropoda
A) periwinkle
B) squid
C) limpets
D) rainbow nudibranchs
Answer - squid
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The Phylum Porifera is characterized by organisms that don't have mouths; instead, they have tiny pores in their outer walls through which water is drawn.
Brittle stars and sea cucumbers are all some of the most widely recognized members of the Echinodermata Phylum.
Jellyfish and Corals would be found in the Phylum Cnidaria.
If you were to walk down the street and passed someone shouting "Segments, it's all about the segments!" - that person would be referring to the Phylum Arthropoda.
If you are examining the barnacles, mussels, snails, and sea star populations in the rocky intertidal zone in hopes of understanding how they interact with one another, then you are studying - community ecology.
Predation, limited resources and climate are three reasons why all populations don't grow exponentially.
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Recipe For Ecosystem
1. abiotic elements
2. producer (auto)
3. consumer (hetero) - herbivores & carnivores
4. decomposers
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Top - tertiary consumer
secondary consumers
primary consumers
Bottom - primary producers
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