The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest

D. W. Johnson, Bruce A Hungate, Paul Dijkstra, G. Hymus, C. R. Hinkle, P. Stiling, B. G. Drake

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2 after five years. Anion and cation exchange membranes showed lower available nitrogen (N) and zinc (Zn) with elevated CO2. Soils in both elevated and ambient CO2 showed decreases in total C, N, sulfur (S), and cation exchange capacity, and increases in base saturation, exchangeable Ca2+, and Mg2+ over the 5-yr sampling period. We hypothesize that these soil changes were a delayed response to prescribed fire, which was applied to the site just before the initiation of the experiment. In the ambient CO2 treatment, the increases in vegetation and O horizon C, N, and S were offset by the losses of soil total C, N, and S, resulting in no statistically significant net changes in ecosystem C, N, or S over time. In the elevated CO2 treatment, the increases in vegetation and O horizon C content outweighed the losses in soil C, resulting in a statistically significant net increase in ecosystem C content. Nitrogen and S contents showed no statistically significant change over time in the elevated CO2 treatment, however. Comparisons of vegetation contents and soil pools of potassium (K), calcium (Ca), and magnesium (Mg) suggest that a substantial proportion of these nutrients were taken up from either groundwater or deep soil horizons. This study demonstrates that changes in ecosystem C sequestration due elevated CO2 or any other factor cannot be accurately assessed in the absence of data on changes in soils.

Original languageEnglish (US)
Pages (from-to)1388-1399
Number of pages12
JournalEcological Applications
Volume13
Issue number5
StatePublished - Oct 2003

Fingerprint

scrub
nutrient
soil
ecosystem
vegetation
ion exchange
nitrogen
sampling
soil horizon
cation exchange capacity
carbon sequestration
oak
distribution
effect
magnesium
soil property
potassium
carbon dioxide
zinc
calcium

Keywords

  • CO, elevated
  • Fire
  • Nutrients
  • O horizon
  • Scrub oak, Florida
  • Soils
  • Uptake

ASJC Scopus subject areas

  • Ecology

Cite this

Johnson, D. W., Hungate, B. A., Dijkstra, P., Hymus, G., Hinkle, C. R., Stiling, P., & Drake, B. G. (2003). The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest. Ecological Applications, 13(5), 1388-1399.

The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest. / Johnson, D. W.; Hungate, Bruce A; Dijkstra, Paul; Hymus, G.; Hinkle, C. R.; Stiling, P.; Drake, B. G.

In: Ecological Applications, Vol. 13, No. 5, 10.2003, p. 1388-1399.

Research output: Contribution to journalArticle

Johnson, DW, Hungate, BA, Dijkstra, P, Hymus, G, Hinkle, CR, Stiling, P & Drake, BG 2003, 'The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest', Ecological Applications, vol. 13, no. 5, pp. 1388-1399.
Johnson, D. W. ; Hungate, Bruce A ; Dijkstra, Paul ; Hymus, G. ; Hinkle, C. R. ; Stiling, P. ; Drake, B. G. / The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest. In: Ecological Applications. 2003 ; Vol. 13, No. 5. pp. 1388-1399.
@article{3e6558156290484f9e4f4ed6d020291d,
title = "The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest",
abstract = "Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2 after five years. Anion and cation exchange membranes showed lower available nitrogen (N) and zinc (Zn) with elevated CO2. Soils in both elevated and ambient CO2 showed decreases in total C, N, sulfur (S), and cation exchange capacity, and increases in base saturation, exchangeable Ca2+, and Mg2+ over the 5-yr sampling period. We hypothesize that these soil changes were a delayed response to prescribed fire, which was applied to the site just before the initiation of the experiment. In the ambient CO2 treatment, the increases in vegetation and O horizon C, N, and S were offset by the losses of soil total C, N, and S, resulting in no statistically significant net changes in ecosystem C, N, or S over time. In the elevated CO2 treatment, the increases in vegetation and O horizon C content outweighed the losses in soil C, resulting in a statistically significant net increase in ecosystem C content. Nitrogen and S contents showed no statistically significant change over time in the elevated CO2 treatment, however. Comparisons of vegetation contents and soil pools of potassium (K), calcium (Ca), and magnesium (Mg) suggest that a substantial proportion of these nutrients were taken up from either groundwater or deep soil horizons. This study demonstrates that changes in ecosystem C sequestration due elevated CO2 or any other factor cannot be accurately assessed in the absence of data on changes in soils.",
keywords = "CO, elevated, Fire, Nutrients, O horizon, Scrub oak, Florida, Soils, Uptake",
author = "Johnson, {D. W.} and Hungate, {Bruce A} and Paul Dijkstra and G. Hymus and Hinkle, {C. R.} and P. Stiling and Drake, {B. G.}",
year = "2003",
month = "10",
language = "English (US)",
volume = "13",
pages = "1388--1399",
journal = "Ecological Appplications",
issn = "1051-0761",
publisher = "Ecological Society of America",
number = "5",

}

TY - JOUR

T1 - The effects of elevated CO2 on nutrient distribution in a fire-adapted scrub oak forest

AU - Johnson, D. W.

AU - Hungate, Bruce A

AU - Dijkstra, Paul

AU - Hymus, G.

AU - Hinkle, C. R.

AU - Stiling, P.

AU - Drake, B. G.

PY - 2003/10

Y1 - 2003/10

N2 - Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2 after five years. Anion and cation exchange membranes showed lower available nitrogen (N) and zinc (Zn) with elevated CO2. Soils in both elevated and ambient CO2 showed decreases in total C, N, sulfur (S), and cation exchange capacity, and increases in base saturation, exchangeable Ca2+, and Mg2+ over the 5-yr sampling period. We hypothesize that these soil changes were a delayed response to prescribed fire, which was applied to the site just before the initiation of the experiment. In the ambient CO2 treatment, the increases in vegetation and O horizon C, N, and S were offset by the losses of soil total C, N, and S, resulting in no statistically significant net changes in ecosystem C, N, or S over time. In the elevated CO2 treatment, the increases in vegetation and O horizon C content outweighed the losses in soil C, resulting in a statistically significant net increase in ecosystem C content. Nitrogen and S contents showed no statistically significant change over time in the elevated CO2 treatment, however. Comparisons of vegetation contents and soil pools of potassium (K), calcium (Ca), and magnesium (Mg) suggest that a substantial proportion of these nutrients were taken up from either groundwater or deep soil horizons. This study demonstrates that changes in ecosystem C sequestration due elevated CO2 or any other factor cannot be accurately assessed in the absence of data on changes in soils.

AB - Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2 after five years. Anion and cation exchange membranes showed lower available nitrogen (N) and zinc (Zn) with elevated CO2. Soils in both elevated and ambient CO2 showed decreases in total C, N, sulfur (S), and cation exchange capacity, and increases in base saturation, exchangeable Ca2+, and Mg2+ over the 5-yr sampling period. We hypothesize that these soil changes were a delayed response to prescribed fire, which was applied to the site just before the initiation of the experiment. In the ambient CO2 treatment, the increases in vegetation and O horizon C, N, and S were offset by the losses of soil total C, N, and S, resulting in no statistically significant net changes in ecosystem C, N, or S over time. In the elevated CO2 treatment, the increases in vegetation and O horizon C content outweighed the losses in soil C, resulting in a statistically significant net increase in ecosystem C content. Nitrogen and S contents showed no statistically significant change over time in the elevated CO2 treatment, however. Comparisons of vegetation contents and soil pools of potassium (K), calcium (Ca), and magnesium (Mg) suggest that a substantial proportion of these nutrients were taken up from either groundwater or deep soil horizons. This study demonstrates that changes in ecosystem C sequestration due elevated CO2 or any other factor cannot be accurately assessed in the absence of data on changes in soils.

KW - CO, elevated

KW - Fire

KW - Nutrients

KW - O horizon

KW - Scrub oak, Florida

KW - Soils

KW - Uptake

UR - http://www.scopus.com/inward/record.url?scp=0346899542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346899542&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0346899542

VL - 13

SP - 1388

EP - 1399

JO - Ecological Appplications

JF - Ecological Appplications

SN - 1051-0761

IS - 5

ER -