Growth-climate relationships vary with height along the stem in lodgepole pine

Chhin, Sophan; Hogg, Edward H.; Lieffers, Victor J.; Huang, Shongming

doi:10.1093/treephys/tpp120

Cited by 39 publications

(22 citation statements)

References 23 publications

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“…For Salix polaris Wahlenb for instance, the growth at the root collar and in the belowground system was consistently greater than the growth in stems (Buchwal et al, 2013). For different northern pine and spruce species, differences in growth-climate relationships have been observed among plant parts, breast height and upper stem samples being more sensitive to previous and current season temperatures and moisture, respectively (Kozlowski et al, 1991;Chhin & Wang, 2008;Chhin et al, , 2010. For different northern pine and spruce species, differences in growth-climate relationships have been observed among plant parts, breast height and upper stem samples being more sensitive to previous and current season temperatures and moisture, respectively (Kozlowski et al, 1991;Chhin & Wang, 2008;Chhin et al, , 2010.…”

Section: Discussionmentioning

confidence: 99%

Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs

Ropars

Angers‐Blondin

Gagnon

et al. 2017

Global Change Biology

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Shrub densification has been widely reported across the circumpolar arctic and subarctic biomes in recent years. Long-term analyses based on dendrochronological techniques applied to shrubs have linked this phenomenon to climate change. However, the multi-stemmed structure of shrubs makes them difficult to sample and therefore leads to non-uniform sampling protocols among shrub ecologists, who will favor either root collars or stems to conduct dendrochronological analyses. Through a comparative study of the use of root collars and stems of Betula glandulosa, a common North American shrub species, we evaluated the relative sensitivity of each plant part to climate variables and assessed whether this sensitivity is consistent across three different types of environments in northwestern Québec, Canada (terrace, hilltop and snowbed). We found that root collars had greater sensitivity to climate than stems and that these differences were maintained across the three types of environments. Growth at the root collar was best explained by spring precipitation and summer temperature, whereas stem growth showed weak and inconsistent responses to climate variables. Moreover, sensitivity to climate was not consistent among plant parts, as individuals having climate-sensitive root collars did not tend to have climate-sensitive stems. These differences in sensitivity of shrub parts to climate highlight the complexity of resource allocation in multi-stemmed plants. Whereas stem initiation and growth are driven by microenvironmental variables such as light availability and competition, root collars integrate the growth of all plant parts instead, rendering them less affected by mechanisms such as competition and more responsive to signals of global change. Although further investigations are required to determine the degree to which these findings are generalizable across the tundra biome, our results indicate that consistency and caution in the choice of plant parts are a key consideration for the success of future dendroclimatological studies on shrubs.

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Section: Discussionmentioning

confidence: 99%

Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs

Ropars

Angers‐Blondin

Gagnon

et al. 2017

Global Change Biology

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“…For example, stem growth at breast height can over-or underestimate whole-tree annual increments under warm and dry climate [13][14][15]. Presently, the best available method for obtaining annual growth increment data is full stem analysis [16][17][18], which involves felling and sectioning the main stem at regular intervals.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Whole Tree Growth Increment Derived from Tree-Ring Series for Use in Assessments of Changes in Forest Productivity across Various Spatial Scales

Metsaranta

Bhatti

2016

Forests

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Abstract:The inherent predictability of inter-annual variation in forest productivity remains unknown. Available field-based data sources for understanding this variability differ in their spatial resolution, temporal resolution, and typical units of measure. Nearly all other tree and forest characteristics are in practice derived from measurements of diameter at breast height (DBH). Therefore, diameter increment reconstructed annually from tree-ring data can be used to estimate annual growth increments of wood volume, but the accuracy and precision of these estimates requires assessment. Annual growth estimates for n = 170 trees sampled for whole stem analysis from five tree species (jack pine, lodgepole pine, black spruce, white spruce, and trembling aspen) in Western Canada were compared against increments derived from breast height measurements only. Inter-annual variability of breast height and whole tree growth increments was highly correlated for most trees. Relative errors varied by species, diameter class, and the equation used to estimate volume (regional vs. national). A simple example of the possible effect of this error when propagated to the stand level is provided.

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“…Interannual basal area increment time series for each increment core were standardized to remove age-related trends [19]. Standardization was based on applying a linear, locally weighted regression (Loess) with a neighborhood span equivalent to 10 years using the function 'loess' (package STATS) in the program R [35].…”

Section: Growth-climate Analyses: Interannual Scalementioning

confidence: 99%

“…Dendrochronology studies therefore can assist with the parameterization of climatically-sensitive forest growth models [17]. Tree-ring analyses represents an alternative and insightful approach to reveal past climatic drivers of tree growth at longer term time scales [15,18,19], and has been an underutilized tool to assess climatic sensitivity of hybrid poplars although it has been applied to poplar species, in particular trembling aspen (Populus tremuloides Michx.) [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Influence of Climate on the Growth of Hybrid Poplar in Michigan

Chhin

2010

Forests

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This study examined the influence of climate on cumulative and interannual growth patterns of 18 full-sib families of hybrid poplars (Populus × smithii Boivin) derived from different geographical locations (state counties) of natural stands of aspen parents (trembling aspen (Populus tremuloides Michx.) and bigtooth aspen (Populus grandidentata Michx.)). The hybrids were subsequently planted in 1982 in southern midMichigan at Michigan State University (MSU) Sandhill Research Area. Cumulative measures of hybrid poplar productivity (diameter, height, basal area, and stem volume) in 2009 (28 years since plantation establishment) were related via correlation analysis to geographical distances and climatic variables (temperature and precipitation) between parental county locations and between parental locations and the plantation site. Tree-ring analysis methods (dendrochronology) were also used to quantify the influence of climate (i.e., mean temperature and total precipitation at monthly and 3-month seasonal scales) on interannual basal area growth rates of hybrid poplars. Analyses of cumulative measures of growth indicated a maternal effect: full-sib families had higher productivity if they had a maternal parent originating from a state county that was close to or had higher temperature (annual and summer) and summer precipitation than corresponding parameters of the planting site. Principal component analysis indicated that 17 of the 18 full-sib families shared a large amount of common growth variation. Dendrochronological analyses of interannual growth-climate relationships indicated that growth was mainly affected by the degree of late summer to fall moisture stress in both the current and previous growth season, and the degree of winter harshness.

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Growth-climate relationships vary with height along the stem in lodgepole pine

Cited by 39 publications

References 23 publications

Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs

Different parts, different stories: climate sensitivity of growth is stronger in root collars vs. stems in tundra shrubs

Evaluation of Whole Tree Growth Increment Derived from Tree-Ring Series for Use in Assessments of Changes in Forest Productivity across Various Spatial Scales

Influence of Climate on the Growth of Hybrid Poplar in Michigan

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