华南农业大学：《农业生态学》课程教学课件（讲稿）Chapter 10 Habitat, Niches and population interactions

Chapter 10 Habitats,Niches and population interactions

Chapter 10 Chapter 10 Habitats, Niches and Habitats, Niches and population interactions population interactions

Questions What are population and community? Why do we study them in ecology?

Questions Questions What are population and community? Why do we study them in ecology?

The Nature of Ecology Biosphere >Ecosystem organization Ecosystems >Organisms >Populations >Communities Populations >Ecosystems Organisms >Biosphere Fig.4.2,p.72

The Nature of Ecology The Nature of Ecology ¾Ecosystem organization Ecosystem organization ¾Organisms Organisms ¾Populations Populations ¾Communities Communities ¾Ecosystems Ecosystems ¾Biosphere Biosphere Biosphere Ecosystems Communities Populations Organisms Fig. 4.2, p. 72

1.Habitats(生境〉 Definition:The natural place of growth or occurrence of a species is called habitat. A place where an organism lives or could be found. Crane in swamp仙鹤 Penguin in polar region企鹅

1. Habitats 1. Habitats (生境） • Definition: The natural place of growth or occurrence of a species is called habitat. • A place where an organism lives or could be found. Crane in swamp 仙鹤 Penguin in polar region 企鹅

Benthos:a deep-sea vent a)Intertidal zone community Ocean habitats

Ocean habitats habitats

Habitat is the Home of an organism However,due to human activity and disturbance,Habitats of many organisms are losing.These organisms are becoming Homeless and extinct

Habitat is the Habitat is the Home of an organism of an organism However, due to human activity and disturbance, Habitats of many organisms are losing. These organisms are becoming Homeless and extinct

Habitat loss due to human activities

Habitat loss due to human activities Habitat loss due to human activities

Habitat Loss Single greatest threat to biodiversity Approx.50+%of all species extinctions have been involved habitat loss Island biogeography theory predicts that around 50% of species are lost with 90%habitat loss

Habitat Loss Habitat Loss • Single greatest threat to biodiversity – Approx. 50+% of all species extinctions have been involved habitat loss – Island biogeography theory predicts that around 50% of species are lost with 90% habitat loss

Impacts of Habitat Modification ·Increased Human Presence Alteration leads to more alteration People arrive,then their influence expands and intensifies

Impacts of Habitat Modification Impacts of Habitat Modification • Increased Human Presence – Alteration leads to more alteration – People arrive, then their influence expands and intensifies

Impacts of Habitat Modification 。Introduced Species >Other species come with us as we fragment >Intentionally >Unintentionally

Impacts of Habitat Modification Impacts of Habitat Modification • Introduced Species ¾Other species come with us as we fragment ¾Intentionally ¾Unintentionally