study guide 1

study guide 1 - 1. biological species- way of classifying...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1. biological species- way of classifying by distinguishing characteristics, common gene pool, inter- fertile, viable offspring Not great definition because of exceptions: sand shinnery oak (Quercus havardii PNW) and post oak (Quercus stellata PNW) cross with each other and their offspring are taller than sand shinnery oak 2. Grass- linear leaf, herbaceous (not woody), monocot (both male and female parts), a plant that is in the grass family (Poaceae) Forb- a herbateous dicot (separate female and male parts) 3. weed- defined by utility, “if I don’t want it, it’s a weed” 4. Difference between shrub and tree, short/tall, branches at base/top, BOTH woody 5. Grasslands of North America From Canada Mexico / Indiana California Originally 300,000,000 ha (39% of US) Now 125,000,000 ha (16%) 6. Floristically, grasses may make up less than 20% of the species richness (# of species) of a grassland- BUT grasses make up more than 75% of the biomass (amount of living matter), and fluctuations in biomass are closely tied to climate change in grasslands. 7. Soils do strange things to plants / over-ride the effects of climate Southern Great Plains: Precipitation: 15-20” (west) 75% of which occurs 35-40” (east) between April & Sept. Evaporation: approx. 100” (west) 70” (east) rainfall + evaporation = soil depth In the west precipitation received is around 15-20 inches annually while evaporation levels are around 100 inches which means the soils are receiving less water making a less fertile soil depth and clay closer the surface. As you travel east rainfall increases to 35-40 inches and evaporation decreases to around 70. Here the fertile soil depth increases because more rainfall with less evaporation pushes down the layers of clay and caliches. These differing soils are also why there are shorter grasses in the west and taller grasses in the east of the Southern Great Plains. Plant structure changes with direction so internodes of plants stretch as you go from west to east. 8. What plants characterize the short, mid, and tall grass Southern Great Plains? Characteristic plant of Southern Great Plains= western bitterweed -short grass plains- blue grama (Bouteloua gracilis PNW) and buffalo grass (Buchloe dactyloides) [North Eastern New Mexico] -mid-grass prairie- sideoats grama (Bouteloua cutipendula PNW) and little bluestem (Schizachyrium
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

study guide 1 - 1. biological species- way of classifying...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online