Genecology of Douglas Fir in Western Oregon and Washington

Clair, J. Bradley St.; Mandel, Nancy L.; Vance-Borland, Ken

doi:10.1093/aob/mci278

Cited by 172 publications

(138 citation statements)

References 30 publications

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“…We also found that BS populations from the more continental ON climate had more rapid bud flush than those from geographically intermediate NB, which broke bud more rapidly than the more maritime NS populations. This fits a pattern where more continental or northern seed sources flush earlier in common-garden experiments than more southern or maritime seed sources (St Clair et al 2005;Li et al 1997).…”

Section: Phenologysupporting

confidence: 71%

Red and black spruce provenance growth and allocation under ambient and elevated CO2

Major

Mosseler

Johnsen

et al. 2015

Trees

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Key message Late-successional red spruce performed relatively better than faster growing black spruce under elevated carbon dioxide; this may be related to species' shade tolerance. Abstract We compared growth, components of growth, and biomass allocation between two largely sympatric spruces, red spruce (Picea rubens Sarg.; RS) and black spruce (Picea mariana (Mill.) B.S.P.; BS) using 12 populations from across eastern Canada grown under ambient CO 2 (aCO 2 ) and elevated CO 2 (eCO 2 ) to evaluate absolute and relative responses to this increasing greenhouse gas. The 12 populations originated from continental to maritime environments, with seed collected from two proximate pairs of RS and BS stands from each of three provinces of eastern Canada-Ontario (ON), New Brunswick (NB), and Nova Scotia (NS)-considered here as provenances. Over 4 years, BS displayed increasingly greater height growth compared with RS. By the end of the 4th year, BS on average had 127 % greater total mass and 50 % greater root-collar diameter than RS. Bud flush was earlier for BS than RS, and BS bud flush occurred in the following order: ON, NB, NS. Under eCO 2 , BS and RS allocated more mass to stem (stem ? branches), and further analysis showed that 25 % of this difference in biomass allocation was attributable to increasing tree size, with the balance directly due to eCO 2 . As expected, BS allocated more to aboveground than belowground mass than RS due their respective status as early-and late-successional species. However, under eCO 2 , BS partitioned more belowground and RS more aboveground than under aCO 2 . Black spruce had greater growth efficiency (GE; stem mass to needle mass ratio) than RS; GE increased with eCO 2 , and the increase was greater for BS than RS. Elevated CO 2 resulted in a relative biomass enhancement of 10.8 and 18.0 % for BS and RS, respectively. This does not support the theory that faster growing species will have a competitive advantage compared with inherently slower growing plants under eCO 2 , but agrees with other observations that shade-tolerant species have greater response ratios to eCO 2 than shade-intolerant species. Also, despite high possibility of hybridization and introgression between the two species, particularly in the highly fragmented and small remnant populations from ON, the findings show that ON and NB remain true to species type for the major growth parameters, allometry, growth efficiencies, and physiological traits and that the provenance variation is mostly consistent with findings from common-garden studies.

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Section: Phenologysupporting

confidence: 71%

Red and black spruce provenance growth and allocation under ambient and elevated CO2

Major

Mosseler

Johnsen

et al. 2015

Trees

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show abstract

“…In contrast, the less productive provenances can benefit from precipitation only to a limited extent. In dry environments, natural selection might favor investments into safety mechanisms such as cavitationresistant water-conducting systems or drought avoidance by early bud break and bud set (St. Clair et al 2005). Under drought conditions, productive provenances might fail to regulate stomata accordingly and suffer from cavitation in the efficient but vulnerable waterconducting system (Bréda et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Five decades of growth in a genetic field trial of Douglas-fir reveal trade-offs between productivity and drought tolerance

Montwé

Spiecker

Hamann

2015

Tree Genetics & Genomes

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To select suitable planting stock for reforestation under uncertain future climates, information about tolerances of genotypes to different climate conditions is necessary. One useful approach is to combine dendrochronological research with common garden experiments to quantify genotype by environment interactions observed over time. Here, we assess the response of Douglas-fir provenances planted in a common environment to climate variation over five decades using treering analysis and historic height data. A rare drought event that affected growth in the year of 1985 provided the opportunity to study how mature Douglas-fir provenances differ in resilience and resistance to drought conditions and whether there are trade-offs with long-term productivity. We found that overall growth performance of provenances originating from drier and colder environments within the coastal range was below average and correlated with interannual variation in temperature. Productive provenances originated primarily from moist and warm areas and their annual increments covaried strongly with summer precipitation and summer drought indices. Further, provenances with below average growth were able to recover more quickly from the drought event of 1985, but did not show stronger drought resistance than coastal sources. Our results provide evidence for tradeoffs between productivity and drought resilience and show that sources originating from moist locations are more dependent on favorable growing conditions in the summer. We conclude that selecting drought-resilient planting stock as an adaptation strategy for climate change is possible, but it would entail reductions in productivity.

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“…Ecological genetics studies in common garden tests show strong relationships of population climate with phenological and morphological traits (including growth) in juvenile Douglas-fir, suggesting that this species expresses strong local adaptation (Rehfeldt, 1991;St Clair et al, 2005). In a precursor to this study, Griesbauer and Green (2010b) found Douglas-fir populations located near its distribution limits in cold (high-elevation) and dry (forest-grassland ecotones) environments are more responsive to yearly variation in climate than populations growing further within the species' climatic and geographic range.…”

Section: Introductionmentioning

confidence: 99%

Using a spatiotemporal climate model to assess population-level Douglas-fir growth sensitivity to climate change across large climatic gradients in British Columbia, Canada

Griesbauer

Green

O’Neill

2011

Forest Ecology and Management

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Genecology of Douglas Fir in Western Oregon and Washington

Cited by 172 publications

References 30 publications

Red and black spruce provenance growth and allocation under ambient and elevated CO2

Red and black spruce provenance growth and allocation under ambient and elevated CO2

Five decades of growth in a genetic field trial of Douglas-fir reveal trade-offs between productivity and drought tolerance

Using a spatiotemporal climate model to assess population-level Douglas-fir growth sensitivity to climate change across large climatic gradients in British Columbia, Canada

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