Environmental Science 3205 Lesson 3.1 Ecosystems and Ecoregions

Transcription

1 Environmental Science 3205 Lesson 3.1 Ecosystems and Ecoregions Do Now: Look at page 59 and identify the eco-region that you live in. If you were forced to pick another ecoregion to live in which one would you pick?

2 Read Pages 55 to 59 Define Ecosystem Range of Tolerance Optimal Range Populations Community Diversity Ecoregion Why is diversity important for organisms living in an Ecosystem? Explain why the Island of Newfoundland is less ecologically diverse than Labrador and mainland Canada?

3 Today s Outcomes 1.24 recognize that Newfoundland and Labrador has a variety of eco-regions and ecosystems

4 Ecosystems Ecosystems Food webs and their transfer of energy and nutrients Biosphere is a global ecosystem Lake ecosystems River ecosystems Forest ecosystems Marine ecosystems Urban ecosystems Two main components of all ecosystems include biotic and abiotic

5 Physical Conditions of Ecosystems All organisms have a Range of Tolerance for the physical conditions of their ecosystem The range of physical conditions in which they can live All organisms also have an Optimal Range that they prefer and survive much better in

6 Biotic Components of Ecosystem Populations of the same species live in a given region or ecosystem Populations of a species vary in age, size, structure, and genetics depending on the ecosystem they live in Populations of a species never live in isolation They share resources with other organisms and species This forms a Community of all the organisms in a given ecosystem

7 Ecosystem Boundaries Ecosystems can have very distinct boundaries ie: Lake Ecosystem Ie: Island ecosystem Ecosysme boundaries can also be transitional or indistinctive Ie: the transition from a marine to coastal ecosystem

8 Diversity of Ecosystems Why is diversity important for organisms living in an Ecosystem? Diverse Ecosystem: many different kinds of organisms at each trophic level. Remove one species may affect one or more other species ability to survive Diverse ecosystems are more likely to survive changes Example: If a predator consumes four species of prey and one prey dies out the predator still has three prey to consume Example: If a predator consumes only one species of prey and that prey dies out then the predator will either also die out or be forced to move to another ecosystem

9 NL Ecological Diversity Explain why the Island of Newfoundland is less ecologically diverse than Labrador and mainland Canada? NL has less ecological diversity than Labrador Glaciers during the ice age scrapped the originally richly diverse ecosystem clean After ice age organisms re-colonies NL Westerly winds blew airborne seeds, lichens, and moss spores Not all plant seeds are spread via airborne NL has fewer plant species Lakes and River fish species able to survive in both salt and fresh water Birds and insects flew to NL Marine animals and other animals crossed the straits on the ice NL has 14 mammals, LB has 39 mammals

10 Collage of Northeastern NL Ecoregion Climate Length of Seasons and Type of Seasons Average Daily Temperatures Length of Growing Season Prevailing Wind Direction Abiotic Physical Features Biotic Fauna Biotic Flora See Rubric

11 Ecological Collage Student Name: Date: Category Relevance of Images Graphics are related to the topic and all make it easier to understand. Graphics are related to the topic and most make it easier to understand. Graphics are related to the topic and a few make it easier to understand. Creativity All of the graphics used in the collage reflect an exceptional degree of student creativity in their creation and/ or display. One or two of the graphics used in the collage reflect an exceptional degree of student creativity in their creation and/ or display. None of the graphics used in the collage reflect an exceptional degree of student creativity in their creation and/ or display. All were simply typical and/ or expected. Attractiveness The collage is exceptionally attractive in terms of design, layout, and neatness. The collage is attractive in terms of design, layout, and neatness. The collage is not attractive in terms of design, layout, and neatness to the point that it is not easily comprehendible. Quality of Information Descriptions associated with the graphics in the collage are clear, complete, and concise. Descriptions associated with the graphics in the collage are mostly clear, but could be a little more concise. Descriptions associated with the graphics in the collage are not clear, complete, or concise.

12 Conclusion Diversity of Ecosystem NL Ecological Diversity Northeastern Ecoregion Collage Finish Collage for HW Follow Up: Bio-Diversity