Trends in stomatal density and 13C/12C ratios of Pinus flexilis needles during last glacial-interglacial cycle

P. K. Van De Water, Steven Leavitt, J. L. Betancourt

Research output: Contribution to journalArticle

177 Citations (Scopus)

Abstract

Measurements of stomatal density and δ13C of limber pine (Pinus flexilis) needles (leaves) preserved in pack rat middens from the Great Basin reveal shifts in plant physiology and leaf morphology during the last 30,000 years. Sites were selected so as to offset glacial to Holocene climatic differences and thus to isolate the effects of changing atmospheric CO2 levels. Stomatal density decreased ∼17 percent and δ13C decreased ∼1.5 per mil during deglaciation from 15,000 to 12,000 years ago, concomitant with a 30 percent increase in atmospheric CO2. Water-use efficiency increased ∼15 percent during deglaciation, if temperature and humidity were held constant and the proxy values for CO2 and δ13C of past atmospheres are accurate. The δ13C variations may help constrain hypotheses about the redistribution of carbon between the atmosphere and biosphere during the last glacial-interglacial cycle.

Original languageEnglish (US)
Pages (from-to)239-243
Number of pages5
JournalScience
Volume264
Issue number5156
StatePublished - Apr 8 1994

Fingerprint

Last Glacial-Interglacial
glacial-interglacial cycle
deglaciation
leaf morphology
midden
atmosphere
water use efficiency
biosphere
humidity
Holocene
carbon
basin
temperature
trend
plant physiology
effect

ASJC Scopus subject areas

  • General

Cite this

Trends in stomatal density and 13C/12C ratios of Pinus flexilis needles during last glacial-interglacial cycle. / Van De Water, P. K.; Leavitt, Steven; Betancourt, J. L.

In: Science, Vol. 264, No. 5156, 08.04.1994, p. 239-243.

Research output: Contribution to journalArticle

@article{4efc8344125541269a800353776179ac,
title = "Trends in stomatal density and 13C/12C ratios of Pinus flexilis needles during last glacial-interglacial cycle",
abstract = "Measurements of stomatal density and δ13C of limber pine (Pinus flexilis) needles (leaves) preserved in pack rat middens from the Great Basin reveal shifts in plant physiology and leaf morphology during the last 30,000 years. Sites were selected so as to offset glacial to Holocene climatic differences and thus to isolate the effects of changing atmospheric CO2 levels. Stomatal density decreased ∼17 percent and δ13C decreased ∼1.5 per mil during deglaciation from 15,000 to 12,000 years ago, concomitant with a 30 percent increase in atmospheric CO2. Water-use efficiency increased ∼15 percent during deglaciation, if temperature and humidity were held constant and the proxy values for CO2 and δ13C of past atmospheres are accurate. The δ13C variations may help constrain hypotheses about the redistribution of carbon between the atmosphere and biosphere during the last glacial-interglacial cycle.",
author = "{Van De Water}, {P. K.} and Steven Leavitt and Betancourt, {J. L.}",
year = "1994",
month = "4",
day = "8",
language = "English (US)",
volume = "264",
pages = "239--243",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "5156",

}

TY - JOUR

T1 - Trends in stomatal density and 13C/12C ratios of Pinus flexilis needles during last glacial-interglacial cycle

AU - Van De Water, P. K.

AU - Leavitt, Steven

AU - Betancourt, J. L.

PY - 1994/4/8

Y1 - 1994/4/8

N2 - Measurements of stomatal density and δ13C of limber pine (Pinus flexilis) needles (leaves) preserved in pack rat middens from the Great Basin reveal shifts in plant physiology and leaf morphology during the last 30,000 years. Sites were selected so as to offset glacial to Holocene climatic differences and thus to isolate the effects of changing atmospheric CO2 levels. Stomatal density decreased ∼17 percent and δ13C decreased ∼1.5 per mil during deglaciation from 15,000 to 12,000 years ago, concomitant with a 30 percent increase in atmospheric CO2. Water-use efficiency increased ∼15 percent during deglaciation, if temperature and humidity were held constant and the proxy values for CO2 and δ13C of past atmospheres are accurate. The δ13C variations may help constrain hypotheses about the redistribution of carbon between the atmosphere and biosphere during the last glacial-interglacial cycle.

AB - Measurements of stomatal density and δ13C of limber pine (Pinus flexilis) needles (leaves) preserved in pack rat middens from the Great Basin reveal shifts in plant physiology and leaf morphology during the last 30,000 years. Sites were selected so as to offset glacial to Holocene climatic differences and thus to isolate the effects of changing atmospheric CO2 levels. Stomatal density decreased ∼17 percent and δ13C decreased ∼1.5 per mil during deglaciation from 15,000 to 12,000 years ago, concomitant with a 30 percent increase in atmospheric CO2. Water-use efficiency increased ∼15 percent during deglaciation, if temperature and humidity were held constant and the proxy values for CO2 and δ13C of past atmospheres are accurate. The δ13C variations may help constrain hypotheses about the redistribution of carbon between the atmosphere and biosphere during the last glacial-interglacial cycle.

UR - http://www.scopus.com/inward/record.url?scp=0028176433&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028176433&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0028176433

VL - 264

SP - 239

EP - 243

JO - Science

JF - Science

SN - 0036-8075

IS - 5156

ER -