Journal
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
Volume 65, Issue 2, Pages 311-324Publisher
SPRINGER
DOI: 10.1007/s00484-020-02033-5
Keywords
Vaganov-Shashkin model; Climate-growth correlations; Tree rings; Process-based modelling; dendroTools; Dendroclimatology
Funding
- Slovenian Research Agency [ARRS BI-RU/19-20-016]
- Slovenian Research Agency: target research project Adaptive management in spruce forests in Slovenia [V4-1614]
- Slovenian Research Agency: program and research group Forest biology, ecology and technology [P4-0107]
- Alexander von Humboldt Research Fellowship
- Russian Ministry of Science and Higher Education [FSRZ-2020-0010, FSRZ-2020-0014]
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Norway spruce shows site-specific responses to climate change, with lower elevation drier sites being more moisture limited and higher elevation moister sites being more temperature limited. Radial growth correlates negatively with rising summer temperature and positively with higher spring precipitation, except for the wettest site at the highest elevation which shows the opposite response.
Norway spruce (Picea abiesL.) is among the most sensitive coniferous species to ongoing climate change. However, previous studies on its growth response to increasing temperatures have yielded contrasting results (from stimulation to suppression), suggesting highly site-specific responses. Here, we present the first study that applies two independent approaches, i.e. the nonlinear, process-based Vaganov-Shashkin (VS) model and linear daily response functions. Data were collected at twelve sites in Slovenia differing in climate regimes and ranging elevation between 170 and 1300 m a.s.l. VS model results revealed that drier Norway spruce sites at lower elevations are mostly moisture limited, while moist high-elevation sites are generally more temperature limited. Daily response functions match well the pattern of growth-limiting factors from the VS model and further explain the effect of climate on radial growth: prevailing growth-limiting factors correspond to the climate variable with higher correlations. Radial growth correlates negatively with rising summer temperature and positively with higher spring precipitation. The opposite response was observed for the wettest site at the highest elevation, which positively reacts to increased summer temperature and will most likely benefit from a warming climate. For all other sites, the future radial growth of Norway spruce largely depends on the balance between spring precipitation and summer temperature.
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