Native riparian tree establishment along the regulated Dolores River, Colorado

Adam P. Coble, Thomas E Kolb

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This study investigated influences of flow regulation of the Dolores River, Colorado, by McPhee Dam on establishment of 3 native riparian tree species (Populus angustifolia, Populus deltoides subsp. wislizenii, and Acer negundo). Tree establishment was documented with dendrochronology at 2 reference sites, the unregulated Upper Dolores and San Miguel rivers, and at multiple reaches along the Lower Dolores River for a pre-dam, canal-diverted period (1961-1984) and a post-dam period (1985-2008). Tree establishment along the Lower Dolores River relative to unregulated reference rivers was negatively affected by river regulation for A. negundo, but not for P. angustifolia and P. deltoides. For P. angustifolia, similar establishment occurred at the Upper and Lower Dolores rivers; establishment was low from 1969-1988, with greater establishment occurring prior to and following this period. For P. deltoides, pulses of tree recruitment occurred along the Lower Dolores River after river damming during 1989-1993 and 2005-2008, and overall recruitment after river damming was significantly greater than that observed for unregulated rivers. Establishment of A. negundo was low at the Lower Dolores River during the last 8 years (2001-2008) of the study period. Our results suggest that flow releases from McPhee Dam into the Lower Dolores River between 1985 and 2008 provided appropriate conditions for Populus establishment, particularly at low topographic positions within the active channel in recent years, whereas A. negundo may require greater flows to bolster establishment at the higher topographic positions where it often occurs.

Original languageEnglish (US)
Pages (from-to)41-53
Number of pages13
JournalWestern North American Naturalist
Volume73
Issue number1
DOIs
StatePublished - May 2013

Fingerprint

Colorado River
rivers
Acer negundo
river
dams (hydrology)
Populus angustifolia
Populus deltoides
dam
dendrochronology
flow regulation
canals (waterways)
Populus
canal

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Native riparian tree establishment along the regulated Dolores River, Colorado. / Coble, Adam P.; Kolb, Thomas E.

In: Western North American Naturalist, Vol. 73, No. 1, 05.2013, p. 41-53.

Research output: Contribution to journalArticle

@article{e58682cd2d584ace838771a3c1864cdd,
title = "Native riparian tree establishment along the regulated Dolores River, Colorado",
abstract = "This study investigated influences of flow regulation of the Dolores River, Colorado, by McPhee Dam on establishment of 3 native riparian tree species (Populus angustifolia, Populus deltoides subsp. wislizenii, and Acer negundo). Tree establishment was documented with dendrochronology at 2 reference sites, the unregulated Upper Dolores and San Miguel rivers, and at multiple reaches along the Lower Dolores River for a pre-dam, canal-diverted period (1961-1984) and a post-dam period (1985-2008). Tree establishment along the Lower Dolores River relative to unregulated reference rivers was negatively affected by river regulation for A. negundo, but not for P. angustifolia and P. deltoides. For P. angustifolia, similar establishment occurred at the Upper and Lower Dolores rivers; establishment was low from 1969-1988, with greater establishment occurring prior to and following this period. For P. deltoides, pulses of tree recruitment occurred along the Lower Dolores River after river damming during 1989-1993 and 2005-2008, and overall recruitment after river damming was significantly greater than that observed for unregulated rivers. Establishment of A. negundo was low at the Lower Dolores River during the last 8 years (2001-2008) of the study period. Our results suggest that flow releases from McPhee Dam into the Lower Dolores River between 1985 and 2008 provided appropriate conditions for Populus establishment, particularly at low topographic positions within the active channel in recent years, whereas A. negundo may require greater flows to bolster establishment at the higher topographic positions where it often occurs.",
author = "Coble, {Adam P.} and Kolb, {Thomas E}",
year = "2013",
month = "5",
doi = "10.3398/064.073.0104",
language = "English (US)",
volume = "73",
pages = "41--53",
journal = "Western North American Naturalist",
issn = "1527-0904",
publisher = "Brigham Young University",
number = "1",

}

TY - JOUR

T1 - Native riparian tree establishment along the regulated Dolores River, Colorado

AU - Coble, Adam P.

AU - Kolb, Thomas E

PY - 2013/5

Y1 - 2013/5

N2 - This study investigated influences of flow regulation of the Dolores River, Colorado, by McPhee Dam on establishment of 3 native riparian tree species (Populus angustifolia, Populus deltoides subsp. wislizenii, and Acer negundo). Tree establishment was documented with dendrochronology at 2 reference sites, the unregulated Upper Dolores and San Miguel rivers, and at multiple reaches along the Lower Dolores River for a pre-dam, canal-diverted period (1961-1984) and a post-dam period (1985-2008). Tree establishment along the Lower Dolores River relative to unregulated reference rivers was negatively affected by river regulation for A. negundo, but not for P. angustifolia and P. deltoides. For P. angustifolia, similar establishment occurred at the Upper and Lower Dolores rivers; establishment was low from 1969-1988, with greater establishment occurring prior to and following this period. For P. deltoides, pulses of tree recruitment occurred along the Lower Dolores River after river damming during 1989-1993 and 2005-2008, and overall recruitment after river damming was significantly greater than that observed for unregulated rivers. Establishment of A. negundo was low at the Lower Dolores River during the last 8 years (2001-2008) of the study period. Our results suggest that flow releases from McPhee Dam into the Lower Dolores River between 1985 and 2008 provided appropriate conditions for Populus establishment, particularly at low topographic positions within the active channel in recent years, whereas A. negundo may require greater flows to bolster establishment at the higher topographic positions where it often occurs.

AB - This study investigated influences of flow regulation of the Dolores River, Colorado, by McPhee Dam on establishment of 3 native riparian tree species (Populus angustifolia, Populus deltoides subsp. wislizenii, and Acer negundo). Tree establishment was documented with dendrochronology at 2 reference sites, the unregulated Upper Dolores and San Miguel rivers, and at multiple reaches along the Lower Dolores River for a pre-dam, canal-diverted period (1961-1984) and a post-dam period (1985-2008). Tree establishment along the Lower Dolores River relative to unregulated reference rivers was negatively affected by river regulation for A. negundo, but not for P. angustifolia and P. deltoides. For P. angustifolia, similar establishment occurred at the Upper and Lower Dolores rivers; establishment was low from 1969-1988, with greater establishment occurring prior to and following this period. For P. deltoides, pulses of tree recruitment occurred along the Lower Dolores River after river damming during 1989-1993 and 2005-2008, and overall recruitment after river damming was significantly greater than that observed for unregulated rivers. Establishment of A. negundo was low at the Lower Dolores River during the last 8 years (2001-2008) of the study period. Our results suggest that flow releases from McPhee Dam into the Lower Dolores River between 1985 and 2008 provided appropriate conditions for Populus establishment, particularly at low topographic positions within the active channel in recent years, whereas A. negundo may require greater flows to bolster establishment at the higher topographic positions where it often occurs.

UR - http://www.scopus.com/inward/record.url?scp=84877948048&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84877948048&partnerID=8YFLogxK

U2 - 10.3398/064.073.0104

DO - 10.3398/064.073.0104

M3 - Article

AN - SCOPUS:84877948048

VL - 73

SP - 41

EP - 53

JO - Western North American Naturalist

JF - Western North American Naturalist

SN - 1527-0904

IS - 1

ER -