IB Student Picnic Hosted by the School of Integrative Biology Thursday, Sept 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 Environment Next week ONLY: Monday AM lab = Tues 5-8 Monday PM lab = Wed 5-8 Use 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 only) Questions in lab… 1)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

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

Aquatic habitats

River continuum Downstream 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 Oceanography Marine biology

Variation in aquatic habitats corresponds to variation in: Physical factors light temperature moving water Chemical factors salinity oxygen

Estuary : where a river reaches the ocean but is impeded by landforms The terrestrial-aquatic interface…

Cypress Swamp

MarshBog/Fen

Tropical mangrove Temperate salt marsh Tropical mangrove

The terrestrial-aquatic interface rocky freshwater estuary marine woody herbaceous swamp bog/fen marsh mangrove salt marsh tropicaltemperate Another concept map…

Observation: Trees grow faster in habitats with salmon than those without salmon.***Speculate why? Predict results from salmon overharvest. Interface of land and Water…

A Tropical rain forest B Tropical seasonal (deciduous) forest /savanna C Subtropical desert D Woodland/shrubland E Temperate rain forest F Temperate seasonal (deciduous) forest G Temperate grassland H Boreal forest (taiga) I Tundra *** Review of major biomes …

Concept map *** What 4 variables distinguish biomes? Herbaceous/graminoids ShrubsTrees (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…