University:
Campbell University
Course:
BIOL 327 | Ecology
Academic year:

2024
Views:

214

Pages:

2
Author:

Athena Harrison

KEY Worksheet - Community Interactions Name - _______KEY______ 1.) What happens when two species with the same niche move into the same ecosystem? When species occupying the same niche move into the same ecosystem they will be competing for resources. This will lead to one of two results. One species will out compete the other causing the later to die or both species will change their behaviour to occupy a different niche so both species can coexist. 2.) Explain, using examples of your own, the difference between interspecific and intraspecific completion. The difference between interspecific and intraspecific competition is intraspecific is when two animals are competing that are the SAME species and interspecific is when the species are DIFFERENT species that are competing. An example of intraspecific competition is two owls hunting for mice in the same field. Interspecific competition would be lions and hyenas competing for zebra in the same plains. 3.) What role do pioneer species have in primary succession? Pioneer species play a very important role in primary succession as they are the first biotic component to enter an area and make the soil habitable for other biotic components to take up residence. 4.) Which of the following is a characteristic of many climax community producers? a.) Able to grow in the absence of soil. b.) Able to grow in the shady understorey of forests. c.) Able to reproduce quickly before other plants arrive. d.) able to develop effective defences against herbivores. 5.) What characteristics do pioneer plants have? The characteristics of pioneer plants are typically short, minimal roots, able to grow without soil and drought resistant. 1 KEY 6.) Describe the role of pioneer plants in the formation of soil. Pioneer plants play the role of soil formation by landing on rocks and other boulders and beginning to grow on the surface. Over time their roots burrow into the rock cracking and splitting it into smaller pieces. When the pioneer species dies the minerals and nutrients it extracted from the rocks are released into the ground forming the beginnings of soil. 2

Species Interactions Worksheet

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