oct30 - fix it (convert to useable form, organic version)...

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

View Full Document Right Arrow Icon
10/30/09 Vegetation change in SW by climate change What limits the Northern distribution of plants? Temperature Warmer temperature = less freezing events (killing frosts) fewer from 1910-20s, widly spacing frosts affect the growing of plants What triggers flowering? photo period(amount of light during day) and temperature Earlier plant flowering is a sign of global warming, plants flower sooner, affects of temperature on plants flowering sooner and longer growing season due to temperature change Implications of increasing temperature Photosynthesis: sunlight, water, CO2
Background image of page 1

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

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

Unformatted text preview: fix it (convert to useable form, organic version) atmosphere • 2 carbon isotopes C12 & C13 Atmosphe re Plant s C3 (cool grass) C4 (warm grass) C12 99% 99.5% 99.8% 99.2% C13 1% 0.5% 0.2% 0.8% • Plants discriminate against C13; C3 plants discriminate more than C4 plants • Organic matter in soil is (mostly) plant derived; lower organic matter is older than higher; soil depth can tell age • C12 & C13 in organic matter can tell if there were more warm or cool season plants at a certain time which can tell temperature changes...
View Full Document

This note was uploaded on 11/14/2010 for the course NRM 3501 taught by Professor Wester during the Fall '09 term at Texas Tech.

Page1 / 2

oct30 - fix it (convert to useable form, organic version)...

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