Littell RC, Milliken GA, Stroup WW, Wolfinger RD (1996) SAS system for mixed models Dowden, Hutchinson, and Ross, Pennsylvania, pp 126–185 In: Edmonds RL Analysis of coniferous forest ecosystems in the western United States. Lassoie JP (1982) Physiological activity of Douglas-fir. Hoff C, Rambal S (2003) An examination of the interaction between climate, soil and leaf area index in a Quercus ilex ecosystem. Harrington JT, Mexal JG, Fisher JT (1994) Volume displacement provides a quick and accurate way to quantify new root production. Hanson D (1998) Population dynamics of three early seral herb species in Pacific Northwest forests. Guevara C, Gonzalez-Benecke C, Wightman M (2021) Ground cover-biomass functions for early-seral vegetation. Goracke HSR (2010) Temporal effect of vegetation management on growth and wood quality of conifers in a western Oregon plantation. Gonzalez-Benecke CA, Dinger EJ (2018) Use of water stress integral to evaluate relationships between soil moisture, plant water stress and stand productivity in young Douglas-fir trees. Ecol Evol 7:11002–11010įlamenco G-B (2019) Long-term effects of vegetation management on biomass stock of four coniferous species in the pacific northwest United States. Am Nat 175:85–97Įziz A, Yan Z, Tian D, Han W, Tang Z, Fang J (2017) Drought effect on plant biomass allocation: a meta-analysis. Oecologia 41:175–182Įverard K, Seabloom EW, Harpole WS, De Mazancourt C (2010) Plant water use affects competition for nitrogen: why drought favors invasive species in California. Ecology 54:57–69Įrnst WH, Nelissen HJM (1979) Growth and mineral nutrition of plant species from clearing on different horizons of an iron-humus podzol profile. Oecologia 141:7–16ĭyrness CT (1973) Early stages of plant succession following logging and burning in the western cascades of Oregon. Dissertation, Oregon State Universityĭomec JC, Warren JM, Meinzer F, Brooks JR, Coulombe R (2004) Native root xylem embolism and stomatal closure in stands of Douglas-fir and ponderosa pine: mitigation by hydraulic redistribution. New Zeal J for Sci 40:93–108ĭinger EJ (2012) Characterizing early-seral competitive mechanisms influencing Douglas-fir seedling growth, vegetation community development, and physiology of selected weedy plant species.
Can J for Res 39:1401–1414ĭinger EJ, Rose R (2010) Initial autumn-spring vegetation management regimes improve moisture conditions and maximize third-year Douglas-fir seedling growth in a pacific northwest plantation. Can J Forestry Res 33:106–117ĭinger EJ, Rose R (2009) Integration of soil moisture, xylem water potential, and fall-spring herbicide treatments to achieve the maximum growth response in newly planted Douglas-fir seedlings.
The presented results can be useful for determining effective forest vegetation management regimes by considering the impact of Senecio presence on Douglas-fir seedling drought stress across different site conditions.Ĭhan SS, Radosevich SR, Grotta AT (2003) Effects of contrasting light and soil moisture availability on the growth and biomass allocation of Douglas-fir and red alder.
The magnitude of this response varied across sites the dry site had the greatest shifts in Senecio biomass partitioning, the highest observable water depletion, and the greatest amount of Douglas-fir water stress. Overall, greater Senecio abundance was associated with greater soil moisture depletion and this soil moisture depletion was correlated with increased Douglas-fir water stress. Senecio also had more than twice the root area of influence as Douglas-fir. Senecio demonstrated a high degree of plasticity across sites increasing its lifespan and shoot:root in response to increased soil water resources. We tested whether competition between Senecio and Douglas-fir seedlings for soil water resources in areas of high Senecio abundance caused increased water stress in the tree seedlings. Pacific Northwest: the Coastal Range, the Cascade foothills, and the fringe of south-central valley of Western Oregon.
This study quantified these interactions at three contrasting sites across the U.S. However, the specific impact of Senecio on soil moisture dynamics and inducement of water stress in newly planted tree seedlings across varying site conditions has not been quantified. Competition for soil water resources between newly planted Douglas-fir seedlings and aggressive early-seral plants, such as Senecio sylvaticus (Senecio), can create drought conditions that impact tree seedling physiology, growth, and likelihood of mortality.
0 kommentar(er)
