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Complex food webs - PowerPoint PPT Presentation

CHAPTER 20

CHAPTER 20

CHAPTER 20. Water Pollution and Its Prevention. An introduction to water pollution. The Mississippi River collects water from 40% of the U.S. Delivers it to the Gulf of Mexico, along with fertilizers and wastes from feedlot animals Drained wetlands no longer intercept agricultural runoff

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1.12k views • 94 slides
Ecosystem Change

Ecosystem Change

Ecosystem Change. If there is no struggle, there is no progress. Frederick Douglass . Ecological Succession. Progressive change in species composition, ecosystem function and structure following a disturbance Minor changes in structure and function accumulate over time

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542 views • 25 slides
How Changes Occur Naturally in Ecosystems

How Changes Occur Naturally in Ecosystems

How Changes Occur Naturally in Ecosystems. The Stickleback: Adapt or Die. Occupied oceans of the northern hemisphere Trapped in lakes as the glaciers retreated Adapted to freshwater environment, forming a new species of sticklebacks In BC pairs of sticklebacks developed

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373 views • 25 slides
Biodiversity

Biodiversity

Biodiversity. A World Rich in Biodiversity. Biodiversity , is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem .

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367 views • 23 slides
Stages Of Succession in a Xerosere

Stages Of Succession in a Xerosere

Stages Of Succession in a Xerosere. Asra, Christine, Haruka , Nicole and Sabrina. Stage 1. Bare, inorganic a-biotic surface becomes available for colonization Pioneers: typically r-selected species. Stage 2. Stage 2 colonization: Pioneers colonize the area first.

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2.17k views • 18 slides
Biodiversity management in dryland ecosystems Grant Norbury James Smith Andrea Byrom Roger Pech

Biodiversity management in dryland ecosystems Grant Norbury James Smith Andrea Byrom Roger Pech

Biodiversity management in dryland ecosystems Grant Norbury James Smith Andrea Byrom Roger Pech. Diverse, but threatened, indigenous biodiversity. Two major ecological issues. Complex food webs Successional vegetation. Exotic invaders. Short grass. Tall grass. Tall grass Shrub.

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267 views • 18 slides
7. Ecological Succession

7. Ecological Succession

7. Ecological Succession. 7.1 Succession. Starter. Match up the key word to the definition. Learning Objectives. Describe changes that occur in the variety of species occupying an area over time Define succession and climax community Success Criteria

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312 views • 15 slides
Starter

Starter

Starter . Find your data from the practical that we did before the holidays. You have 10 minutes to: C omplete the graph using the checklist to make sure that it is up to standard Make a quick conclusion and evaluation based on your analysis

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220 views • 13 slides

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