Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities

David R. Carter, Robert A Slesak, Timothy B. Harrington, David H. Peter, Anthony W. D’Amato

Research output: Contribution to journalArticle

Abstract

Scotch broom [Cytisus scoparius (L.) Link] is a globally important nitrogen (N)-fixing invasive plant species that has potential to alter soil water dynamics, soil chemistry, and plant communities. We evaluated the effects of Scotch broom on soil moisture, soil chemistry, soil temperature, photosynthetically active radiation (PAR), and vegetation communities over 4 years at a site recently harvested for timber. Treatments of Scotch broom (either present via planting or absent) and background vegetation (either present or absent via herbicide treatments) were applied to 4 m 2 plots. Background vegetation was associated with the greatest decrease of soil water content (SWC) among treatments. During the driest year, Scotch broom showed some evidence of increased early-and late-season soil water usage, and, briefly, a high usage relative to background vegetation plots. On a percent cover basis, Scotch broom had a substantially greater negative influence on SWC than did background vegetation. Surprisingly, Scotch broom was not consistently associated with increases in total soil N, but there was evidence of increasing soil water N when Scotch broom was present. Scotch broom-only plots had greater concentrations of soil water magnesium (Mg 2+ ) and calcium (Ca 2+ ) than other treatments. On a percent cover basis, Scotch broom had a uniquely high demand for potassium (K + ) relative to the background vegetation. Average soil temperature was slightly greater, and soil surface PAR lower, with Scotch broom present. Scotch broom-absent plots increased in species diversity and richness over time, while Scotch broom-present plots remained unchanged. Scotch broom presence was associated with an increase in cover of nonnative sweet vernalgrass (Anthoxanthum odoratum L.). Scotch broom generated positive feedbacks with resource conditions that favored its dominance and the establishment of nonnative grass.

Original languageEnglish (US)
Pages (from-to)1055-1073
Number of pages19
JournalBiological Invasions
Volume21
Issue number4
DOIs
StatePublished - Apr 15 2019

Fingerprint

Cytisus scoparius
plant community
plant communities
soil water
vegetation
soil chemistry
photosynthetically active radiation
soil temperature
water content
Anthoxanthum odoratum
herbicide
timber
species diversity
magnesium
soil surface
potassium
soil moisture
species richness
calcium
grass

Keywords

  • Extended growing season
  • Pacific Northwest
  • Soil properties
  • Soil water

Cite this

Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities. / Carter, David R.; Slesak, Robert A; Harrington, Timothy B.; Peter, David H.; D’Amato, Anthony W.

In: Biological Invasions, Vol. 21, No. 4, 15.04.2019, p. 1055-1073.

Research output: Contribution to journalArticle

Carter, David R. ; Slesak, Robert A ; Harrington, Timothy B. ; Peter, David H. ; D’Amato, Anthony W. / Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities. In: Biological Invasions. 2019 ; Vol. 21, No. 4. pp. 1055-1073.
@article{52f68a96dd9d43399932b754a2351d56,
title = "Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities",
abstract = "Scotch broom [Cytisus scoparius (L.) Link] is a globally important nitrogen (N)-fixing invasive plant species that has potential to alter soil water dynamics, soil chemistry, and plant communities. We evaluated the effects of Scotch broom on soil moisture, soil chemistry, soil temperature, photosynthetically active radiation (PAR), and vegetation communities over 4 years at a site recently harvested for timber. Treatments of Scotch broom (either present via planting or absent) and background vegetation (either present or absent via herbicide treatments) were applied to 4 m 2 plots. Background vegetation was associated with the greatest decrease of soil water content (SWC) among treatments. During the driest year, Scotch broom showed some evidence of increased early-and late-season soil water usage, and, briefly, a high usage relative to background vegetation plots. On a percent cover basis, Scotch broom had a substantially greater negative influence on SWC than did background vegetation. Surprisingly, Scotch broom was not consistently associated with increases in total soil N, but there was evidence of increasing soil water N when Scotch broom was present. Scotch broom-only plots had greater concentrations of soil water magnesium (Mg 2+ ) and calcium (Ca 2+ ) than other treatments. On a percent cover basis, Scotch broom had a uniquely high demand for potassium (K + ) relative to the background vegetation. Average soil temperature was slightly greater, and soil surface PAR lower, with Scotch broom present. Scotch broom-absent plots increased in species diversity and richness over time, while Scotch broom-present plots remained unchanged. Scotch broom presence was associated with an increase in cover of nonnative sweet vernalgrass (Anthoxanthum odoratum L.). Scotch broom generated positive feedbacks with resource conditions that favored its dominance and the establishment of nonnative grass.",
keywords = "Extended growing season, Pacific Northwest, Soil properties, Soil water",
author = "Carter, {David R.} and Slesak, {Robert A} and Harrington, {Timothy B.} and Peter, {David H.} and D’Amato, {Anthony W.}",
year = "2019",
month = "4",
day = "15",
doi = "10.1007/s10530-018-1885-y",
language = "English (US)",
volume = "21",
pages = "1055--1073",
journal = "Biological Invasions",
issn = "1387-3547",
publisher = "Springer Netherlands",
number = "4",

}

TY - JOUR

T1 - Scotch broom (Cytisus scoparius) modifies microenvironment to promote nonnative plant communities

AU - Carter, David R.

AU - Slesak, Robert A

AU - Harrington, Timothy B.

AU - Peter, David H.

AU - D’Amato, Anthony W.

PY - 2019/4/15

Y1 - 2019/4/15

N2 - Scotch broom [Cytisus scoparius (L.) Link] is a globally important nitrogen (N)-fixing invasive plant species that has potential to alter soil water dynamics, soil chemistry, and plant communities. We evaluated the effects of Scotch broom on soil moisture, soil chemistry, soil temperature, photosynthetically active radiation (PAR), and vegetation communities over 4 years at a site recently harvested for timber. Treatments of Scotch broom (either present via planting or absent) and background vegetation (either present or absent via herbicide treatments) were applied to 4 m 2 plots. Background vegetation was associated with the greatest decrease of soil water content (SWC) among treatments. During the driest year, Scotch broom showed some evidence of increased early-and late-season soil water usage, and, briefly, a high usage relative to background vegetation plots. On a percent cover basis, Scotch broom had a substantially greater negative influence on SWC than did background vegetation. Surprisingly, Scotch broom was not consistently associated with increases in total soil N, but there was evidence of increasing soil water N when Scotch broom was present. Scotch broom-only plots had greater concentrations of soil water magnesium (Mg 2+ ) and calcium (Ca 2+ ) than other treatments. On a percent cover basis, Scotch broom had a uniquely high demand for potassium (K + ) relative to the background vegetation. Average soil temperature was slightly greater, and soil surface PAR lower, with Scotch broom present. Scotch broom-absent plots increased in species diversity and richness over time, while Scotch broom-present plots remained unchanged. Scotch broom presence was associated with an increase in cover of nonnative sweet vernalgrass (Anthoxanthum odoratum L.). Scotch broom generated positive feedbacks with resource conditions that favored its dominance and the establishment of nonnative grass.

AB - Scotch broom [Cytisus scoparius (L.) Link] is a globally important nitrogen (N)-fixing invasive plant species that has potential to alter soil water dynamics, soil chemistry, and plant communities. We evaluated the effects of Scotch broom on soil moisture, soil chemistry, soil temperature, photosynthetically active radiation (PAR), and vegetation communities over 4 years at a site recently harvested for timber. Treatments of Scotch broom (either present via planting or absent) and background vegetation (either present or absent via herbicide treatments) were applied to 4 m 2 plots. Background vegetation was associated with the greatest decrease of soil water content (SWC) among treatments. During the driest year, Scotch broom showed some evidence of increased early-and late-season soil water usage, and, briefly, a high usage relative to background vegetation plots. On a percent cover basis, Scotch broom had a substantially greater negative influence on SWC than did background vegetation. Surprisingly, Scotch broom was not consistently associated with increases in total soil N, but there was evidence of increasing soil water N when Scotch broom was present. Scotch broom-only plots had greater concentrations of soil water magnesium (Mg 2+ ) and calcium (Ca 2+ ) than other treatments. On a percent cover basis, Scotch broom had a uniquely high demand for potassium (K + ) relative to the background vegetation. Average soil temperature was slightly greater, and soil surface PAR lower, with Scotch broom present. Scotch broom-absent plots increased in species diversity and richness over time, while Scotch broom-present plots remained unchanged. Scotch broom presence was associated with an increase in cover of nonnative sweet vernalgrass (Anthoxanthum odoratum L.). Scotch broom generated positive feedbacks with resource conditions that favored its dominance and the establishment of nonnative grass.

KW - Extended growing season

KW - Pacific Northwest

KW - Soil properties

KW - Soil water

UR - http://www.scopus.com/inward/record.url?scp=85057312135&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057312135&partnerID=8YFLogxK

U2 - 10.1007/s10530-018-1885-y

DO - 10.1007/s10530-018-1885-y

M3 - Article

AN - SCOPUS:85057312135

VL - 21

SP - 1055

EP - 1073

JO - Biological Invasions

JF - Biological Invasions

SN - 1387-3547

IS - 4

ER -