Ecology 312 SI STEVEN F. Last Session: Aquatic Biomes, Review This Session: Plate Tectonics, Lecture Quiz 2

Transcription

1 Ecology 312 SI STEVEN F. Last Session: Aquatic Biomes, Review This Session: Plate Tectonics, Lecture Quiz 2

2 Questions?

3 Warm up: KWL KNOW: On a piece of paper, write down things that you know well enough to teach to someone else. WANT: Then write down topics that you don t understand as well and want further clarification on

4 Terrestrial Biomes Between 30 and 50 N latitude Warm, moist summers and cold, dry winters Grasses dominate; maintained by frequent fires and large herbivores such as bison Between 10 N and 10 S Annual precipitation > 2000 mm No seasonal changes High biomass, high diversity about 50% of Earth s species Broadleaved evergreen and deciduous trees In high pressure zones at 30 N and S High temperatures, low moisture Sparse vegetation and animal populations Low water availability constrains plant abundance and influences form

5 WTB Between 30 and 40 N latitude Evergreen shrubs and trees Mediterranean-type climates wet winters and hot, dry summers Fire is common and helps maintain the biome Sclerophyllous leaves 50 to 65 N Long, severe winters Permafrost (soil that remains frozen year-round) prevents drainage and results in saturated soils Trees present are conifers pines, spruces, larches and birches 30 to 50 N and S, coastal, continental, and maritime zones Lower diversity than tropical and deciduous forests Leaves tend to be acidic, and soils nutrient-poor

6 WTB Above 65 latitude, mostly in the Arctic Cold temperatures, low precipitation Short summers with long days Vegetation is sedges, forbs, grasses, low-growing shrubs, lichens, and mosses Widespread permafrost 30 to 50 N, on continental edges with enough rainfall for tree growth Leaves are deciduous in winter Oaks, maples, and beeches occur everywhere in this biome Species diversity lower than tropical rainforests North and south of the wet tropics Wet and dry seasons associated with movement of the ITCZ Shorter trees, deciduous in dry seasons, more grasses and shrubs

7 Aquatic Biomes 1) Define the different functional feeding groups found in streams, and give examples of their dominant food source. 2) Define the littoral, pelagic, and benthic zones of a lake 3) Define turnover and describe how it occurs in deep lakes; at what temperature is water at it s most dense? 4) Discuss how physical characteristics of the ocean change with depth and how that alters the biota. 5) What influence have humans had on the ocean?

8 Plate Tectonics 1) What is the concept behind plate tectonics (how does it work)? 2) Why is the biodiversity vastly different between the islands north of Australia and south of Asia that are in a close proximity, but the biodiversity is similar between North America and Europe? 3) Why is the ocean floor relatively young compared to the material making up the continents? 4) What are the 3 types of plate boundaries?

9 Wrap up: KWL LEARN: Write down what you ve learned during this session. This allows you to track what you re comfortable with, and what you should focus your study time on. After writing what you learned, continue to write things you WANT to learn so you know what to study from.

10 Tuesday s Session I have yet to hear back about a schedule change approval I will make an announcement on Tuesday regarding the session I will also make an announcement on the SI website