IB Student Picnic Hosted by the School of Integrative Biology

Thursday, Sept 4

5-8 PM

Illini Grove Pavilion

(corner of Lincoln and Pennsylvania Ave)

Free Food

Free T-shirt

Meet Faculty

Find out what SIB is all about and meet other IB majors!

Assignment: Read Chapter 4:Variations in the Physical EnvironmentNext week ONLY: Monday AM lab = Tues 5-8 Monday PM lab = Wed 5-8Use back door if late…

Lab Assignments - this week• DUE at beginning of first lab this week Homework 1: Hypotheses…(pg. 179) *****2 xerox copies of I-card with photo• Read before first lab this week: Lab 1: Small mammals (pg. 61) Homework 2A: Mammal habitat choice (pg.189) Lab Emphasis on Scientific Inquiry (pg. 7-8) Student-Driven-Project 1 (pg. 92-94 only)

• Questions in lab…• Do successional habitats differ in the type and

abundance of small mammals?2) Does seed oil content affect their food choice?

Biological Communities: The Biome Concept

OBJECTIVES• What are large-scale distributions of plant

life forms?• aquatic• terrestrial• What is the proximal cause of their

distribution?• How does climate differ among biomes?• Whittaker’s scheme• Walter’s climagrams• Do biomes and plant form and function

converge in regions with similar climate?

Example of exam question…A. Which biome would occur in each climate?

B. What is the limiting climatic factor(s) for each biome?

C. Where is each biome located in the Western (New World) and Eastern (Old World) hemisphere? Put letters on map.

1 2 3

C. Where is each of those 3 biomes located in the Western (New World) and Eastern (Old World) hemisphere? Put numbers on map.

Concept Map… *** Which physical factor separates habitats?

A water availability B movement of water USE EACH ONCE C medium of gas exchange D amount of salinity

Biome

Terrestrial Aquatic

Wetlands Desert Freshwater Marine

Rivers Lakes

1

2

3

4

Aquatic habitats

River continuumDownstream drift

High gradient vs.Low gradient

River: where precipitation > evaporation

photic

aphotic

A lake can be divided into vertical and horizontal zones.

Lakes can be poor or rich in nutrients.

Oligotrophic Eutrophic

IB 449 Limnology =study of freshwater habitats

Abyssal zone

Ocean zones differ in temperature, depth, light, and tides.

Ocean habitats

OceanographyMarine biology

• Variation in aquatic habitats corresponds to variation in:

• Physical factors

• light

• temperature

• moving water

• Chemical factors

• salinity

• oxygen

Estuary:

where ariverreaches the ocean but isimpeded bylandforms

The terrestrial-aquatic interface…

Cypress Swamp

Marsh Bog/Fen

Tropicalmangrove

Temperate

salt marsh

Tropicalmangrove

The terrestrial-aquatic interface

rocky freshwater estuary marine

woody herbaceous woody herbaceous

swamp bog/fen marsh mangrove salt marsh

tropical temperate

Another concept map…

Observation:Trees grow faster in habitats with salmon than those without salmon.***Speculate why?Predict results from salmon overharvest.

Interface ofland andWater…

A Tropical rain forestB Tropical seasonal (deciduous) forest /savannaC Subtropical desertD Woodland/shrublandE Temperate rain forestF Temperate seasonal (deciduous) forestG Temperate grasslandH Boreal forest (taiga)I Tundra

***Review of major biomes…

Concept map *** What 4 variables distinguish biomes?

Herbaceous/graminoids Shrubs Trees (grasses, sedges)

Shrublands Forests Grasslands Deserts

Tundra Evergreen Deciduous

Conifers Broadleaf Temp. Trop.

Temperate Tropical

Biome: a major type of terrestrial community categorized by its 1) dominant plant form, 2) seasonality of leaves, 3) leaf morphology, 4) location.

***What biomes are in

the USA?Start and end in Alaska…