Biological invasion alters regional nitrogen-oxide emissions from tropical rainforests

Sharon Hall, Gregory P. Asner

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

We explored whether the invasion of an exotic, nitrogen (N) fixing tree into native Hawaiian tropical forests has altered regional emissions of nitrous oxide (N2O) and nitric oxide (NO), two atmospherically important trace gases produced by microorganisms in soils. Ecosystem processes, including nitrification and N-oxide emissions, were not affected by Morella faya (formerly Myrica faya) invasion until it dominated the community with few native species in the overstory or understory. Remote-sensing estimates of upper-canopy leaf N concentration were strongly correlated to N-oxide emissions in ecosystems at the mesic-wet end of a precipitation gradient, where temperatures are warm, relatively constant, and N limits biological processes. In contrast, remotely sensed and field-based canopy chemistry was not related to N-oxide emissions in dry forest ecosystems where the seasonality of temperature and moisture exerted stronger control over soil gas fluxes. Thus, remote sensing of canopy N was useful for estimating the impact of M. faya on regional N-oxide emissions only in regions receiving >1800 mm rainfall annually. Our estimates of N-oxide emissions from M. faya are half as large and 35 times more precise than those made using traditional, plot-level methods of extrapolation. Over the 40 years since its first occurrence in wet forests of Hawai'i Volcanoes National Park, M. faya has increased N-oxide emissions 16-fold, with its effects most pronounced in summer and at the N-rich centers of dense, monospecific stands.

Original languageEnglish (US)
Pages (from-to)2143-2160
Number of pages18
JournalGlobal Change Biology
Volume13
Issue number10
DOIs
StatePublished - Oct 2007

Fingerprint

biological invasion
nitrogen oxides
rainforest
Oxides
Nitric Oxide
oxide
Ecosystems
canopy
Remote sensing
Gases
Soils
Volcanoes
Nitrification
remote sensing
Nitrous Oxide
soil gas
ecosystem
Extrapolation
overstory
Microorganisms

Keywords

  • Hawai'i
  • Metrosideros polymorpha
  • Myrica (Morella) faya
  • Nitricoxide
  • Nitrification
  • Nitrous oxide
  • Remote sensing
  • Tropical forest

ASJC Scopus subject areas

  • Ecology
  • Global and Planetary Change
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Biological invasion alters regional nitrogen-oxide emissions from tropical rainforests. / Hall, Sharon; Asner, Gregory P.

In: Global Change Biology, Vol. 13, No. 10, 10.2007, p. 2143-2160.

Research output: Contribution to journalArticle

@article{c05cbd18093f4084b0a2cb8e189b27e8,
title = "Biological invasion alters regional nitrogen-oxide emissions from tropical rainforests",
abstract = "We explored whether the invasion of an exotic, nitrogen (N) fixing tree into native Hawaiian tropical forests has altered regional emissions of nitrous oxide (N2O) and nitric oxide (NO), two atmospherically important trace gases produced by microorganisms in soils. Ecosystem processes, including nitrification and N-oxide emissions, were not affected by Morella faya (formerly Myrica faya) invasion until it dominated the community with few native species in the overstory or understory. Remote-sensing estimates of upper-canopy leaf N concentration were strongly correlated to N-oxide emissions in ecosystems at the mesic-wet end of a precipitation gradient, where temperatures are warm, relatively constant, and N limits biological processes. In contrast, remotely sensed and field-based canopy chemistry was not related to N-oxide emissions in dry forest ecosystems where the seasonality of temperature and moisture exerted stronger control over soil gas fluxes. Thus, remote sensing of canopy N was useful for estimating the impact of M. faya on regional N-oxide emissions only in regions receiving >1800 mm rainfall annually. Our estimates of N-oxide emissions from M. faya are half as large and 35 times more precise than those made using traditional, plot-level methods of extrapolation. Over the 40 years since its first occurrence in wet forests of Hawai'i Volcanoes National Park, M. faya has increased N-oxide emissions 16-fold, with its effects most pronounced in summer and at the N-rich centers of dense, monospecific stands.",
keywords = "Hawai'i, Metrosideros polymorpha, Myrica (Morella) faya, Nitricoxide, Nitrification, Nitrous oxide, Remote sensing, Tropical forest",
author = "Sharon Hall and Asner, {Gregory P.}",
year = "2007",
month = "10",
doi = "10.1111/j.1365-2486.2007.01410.x",
language = "English (US)",
volume = "13",
pages = "2143--2160",
journal = "Global Change Biology",
issn = "1354-1013",
publisher = "Wiley-Blackwell",
number = "10",

}

TY - JOUR

T1 - Biological invasion alters regional nitrogen-oxide emissions from tropical rainforests

AU - Hall, Sharon

AU - Asner, Gregory P.

PY - 2007/10

Y1 - 2007/10

N2 - We explored whether the invasion of an exotic, nitrogen (N) fixing tree into native Hawaiian tropical forests has altered regional emissions of nitrous oxide (N2O) and nitric oxide (NO), two atmospherically important trace gases produced by microorganisms in soils. Ecosystem processes, including nitrification and N-oxide emissions, were not affected by Morella faya (formerly Myrica faya) invasion until it dominated the community with few native species in the overstory or understory. Remote-sensing estimates of upper-canopy leaf N concentration were strongly correlated to N-oxide emissions in ecosystems at the mesic-wet end of a precipitation gradient, where temperatures are warm, relatively constant, and N limits biological processes. In contrast, remotely sensed and field-based canopy chemistry was not related to N-oxide emissions in dry forest ecosystems where the seasonality of temperature and moisture exerted stronger control over soil gas fluxes. Thus, remote sensing of canopy N was useful for estimating the impact of M. faya on regional N-oxide emissions only in regions receiving >1800 mm rainfall annually. Our estimates of N-oxide emissions from M. faya are half as large and 35 times more precise than those made using traditional, plot-level methods of extrapolation. Over the 40 years since its first occurrence in wet forests of Hawai'i Volcanoes National Park, M. faya has increased N-oxide emissions 16-fold, with its effects most pronounced in summer and at the N-rich centers of dense, monospecific stands.

AB - We explored whether the invasion of an exotic, nitrogen (N) fixing tree into native Hawaiian tropical forests has altered regional emissions of nitrous oxide (N2O) and nitric oxide (NO), two atmospherically important trace gases produced by microorganisms in soils. Ecosystem processes, including nitrification and N-oxide emissions, were not affected by Morella faya (formerly Myrica faya) invasion until it dominated the community with few native species in the overstory or understory. Remote-sensing estimates of upper-canopy leaf N concentration were strongly correlated to N-oxide emissions in ecosystems at the mesic-wet end of a precipitation gradient, where temperatures are warm, relatively constant, and N limits biological processes. In contrast, remotely sensed and field-based canopy chemistry was not related to N-oxide emissions in dry forest ecosystems where the seasonality of temperature and moisture exerted stronger control over soil gas fluxes. Thus, remote sensing of canopy N was useful for estimating the impact of M. faya on regional N-oxide emissions only in regions receiving >1800 mm rainfall annually. Our estimates of N-oxide emissions from M. faya are half as large and 35 times more precise than those made using traditional, plot-level methods of extrapolation. Over the 40 years since its first occurrence in wet forests of Hawai'i Volcanoes National Park, M. faya has increased N-oxide emissions 16-fold, with its effects most pronounced in summer and at the N-rich centers of dense, monospecific stands.

KW - Hawai'i

KW - Metrosideros polymorpha

KW - Myrica (Morella) faya

KW - Nitricoxide

KW - Nitrification

KW - Nitrous oxide

KW - Remote sensing

KW - Tropical forest

UR - http://www.scopus.com/inward/record.url?scp=34948840916&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34948840916&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2486.2007.01410.x

DO - 10.1111/j.1365-2486.2007.01410.x

M3 - Article

AN - SCOPUS:34948840916

VL - 13

SP - 2143

EP - 2160

JO - Global Change Biology

JF - Global Change Biology

SN - 1354-1013

IS - 10

ER -