Genetic variation in productivity of foundation riparian species at the edge of their distribution

Implications for restoration and assisted migration in a warming climate

Kevin C. Grady, Sharon M. Ferrier, Thomas E Kolb, Stephen C. Hart, Gerard J Allan, Thomas G Whitham

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We examined the hypothesis that genotypic variation among populations of commonly co-occurring phreatophytic trees (Populus fremontii, Salix gooddingii) and the shrub (Salix exigua) regulates aboveground net primary productivity (ANPP) at a hot site at the edge of the species' distribution. We used a provenance trial in which replicated genotypes from populations varying in mean annual temperature were transplanted to a common garden adjacent to the Lower Colorado River in southeastern California. The garden environment represented an extreme maximum temperature for the study species. Four major findings emerged: (1) Genotypic variation in ANPP was significant for all species with broad-sense heritability (H 2) across populations of 0.11, 0.13, and 0.10 for P. fremontii, S. gooddingii, and S. exigua, respectively, and within-population H 2 ranging from 0.00 to 0.25, 0.00 to 0.44, and 0.02 to 0.21, respectively. (2) Population ANPP decreased linearly as mean annual maximum temperature (MAMT) transfer distance increased for both P. fremontii (r 2 = 0.64) and S. gooddingii (r 2 = 0.37), whereas it did not change for S. exigua; (3) Populations with similar MAMT to that of the common garden were 1.5 and 1.2 times more productive than populations with 5.0 °C MAMT transfer distances for P. fremontii and S. gooddingii, respectively; and (4) Variation in regression slopes among species for the relationship between ANPP and MAMT indicate species-specific responses to temperature. As these plant species characterize a threatened habitat type and support a diverse community that includes endangered species, ecosystem restoration programs should consider using both local genotypes and productive genotypes from warmer environments to maximize productivity of riparian ecosystems in the face of global climate change.

Original languageEnglish (US)
Pages (from-to)3724-3735
Number of pages12
JournalGlobal Change Biology
Volume17
Issue number12
DOIs
StatePublished - Dec 2011

Fingerprint

Restoration
genetic variation
warming
Productivity
productivity
climate
Salix
garden
temperature
genotype
Temperature
Ecosystems
provenance trial
ecosystem
heritability
distribution
restoration
endangered species
habitat type
Climate change

Keywords

  • Aboveground net primary productivity
  • Assisted migration
  • Climate change
  • Cottonwood
  • Heritability
  • Local adaptation
  • Provenance
  • Riparian
  • Willow

ASJC Scopus subject areas

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

Cite this

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title = "Genetic variation in productivity of foundation riparian species at the edge of their distribution: Implications for restoration and assisted migration in a warming climate",
abstract = "We examined the hypothesis that genotypic variation among populations of commonly co-occurring phreatophytic trees (Populus fremontii, Salix gooddingii) and the shrub (Salix exigua) regulates aboveground net primary productivity (ANPP) at a hot site at the edge of the species' distribution. We used a provenance trial in which replicated genotypes from populations varying in mean annual temperature were transplanted to a common garden adjacent to the Lower Colorado River in southeastern California. The garden environment represented an extreme maximum temperature for the study species. Four major findings emerged: (1) Genotypic variation in ANPP was significant for all species with broad-sense heritability (H 2) across populations of 0.11, 0.13, and 0.10 for P. fremontii, S. gooddingii, and S. exigua, respectively, and within-population H 2 ranging from 0.00 to 0.25, 0.00 to 0.44, and 0.02 to 0.21, respectively. (2) Population ANPP decreased linearly as mean annual maximum temperature (MAMT) transfer distance increased for both P. fremontii (r 2 = 0.64) and S. gooddingii (r 2 = 0.37), whereas it did not change for S. exigua; (3) Populations with similar MAMT to that of the common garden were 1.5 and 1.2 times more productive than populations with 5.0 °C MAMT transfer distances for P. fremontii and S. gooddingii, respectively; and (4) Variation in regression slopes among species for the relationship between ANPP and MAMT indicate species-specific responses to temperature. As these plant species characterize a threatened habitat type and support a diverse community that includes endangered species, ecosystem restoration programs should consider using both local genotypes and productive genotypes from warmer environments to maximize productivity of riparian ecosystems in the face of global climate change.",
keywords = "Aboveground net primary productivity, Assisted migration, Climate change, Cottonwood, Heritability, Local adaptation, Provenance, Riparian, Willow",
author = "Grady, {Kevin C.} and Ferrier, {Sharon M.} and Kolb, {Thomas E} and Hart, {Stephen C.} and Allan, {Gerard J} and Whitham, {Thomas G}",
year = "2011",
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T2 - Implications for restoration and assisted migration in a warming climate

AU - Grady, Kevin C.

AU - Ferrier, Sharon M.

AU - Kolb, Thomas E

AU - Hart, Stephen C.

AU - Allan, Gerard J

AU - Whitham, Thomas G

PY - 2011/12

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AB - We examined the hypothesis that genotypic variation among populations of commonly co-occurring phreatophytic trees (Populus fremontii, Salix gooddingii) and the shrub (Salix exigua) regulates aboveground net primary productivity (ANPP) at a hot site at the edge of the species' distribution. We used a provenance trial in which replicated genotypes from populations varying in mean annual temperature were transplanted to a common garden adjacent to the Lower Colorado River in southeastern California. The garden environment represented an extreme maximum temperature for the study species. Four major findings emerged: (1) Genotypic variation in ANPP was significant for all species with broad-sense heritability (H 2) across populations of 0.11, 0.13, and 0.10 for P. fremontii, S. gooddingii, and S. exigua, respectively, and within-population H 2 ranging from 0.00 to 0.25, 0.00 to 0.44, and 0.02 to 0.21, respectively. (2) Population ANPP decreased linearly as mean annual maximum temperature (MAMT) transfer distance increased for both P. fremontii (r 2 = 0.64) and S. gooddingii (r 2 = 0.37), whereas it did not change for S. exigua; (3) Populations with similar MAMT to that of the common garden were 1.5 and 1.2 times more productive than populations with 5.0 °C MAMT transfer distances for P. fremontii and S. gooddingii, respectively; and (4) Variation in regression slopes among species for the relationship between ANPP and MAMT indicate species-specific responses to temperature. As these plant species characterize a threatened habitat type and support a diverse community that includes endangered species, ecosystem restoration programs should consider using both local genotypes and productive genotypes from warmer environments to maximize productivity of riparian ecosystems in the face of global climate change.

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KW - Climate change

KW - Cottonwood

KW - Heritability

KW - Local adaptation

KW - Provenance

KW - Riparian

KW - Willow

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