Affiliation:
1. Center for Ecological Research, Northeast Forestry University, Harbin 150040, China
2. Key Laboratory of Sustainable Forest Ecosystem Management (Ministry of Education), Northeast Forestry University, Harbin 150040, China
Abstract
It is important to understand the response of stem diameter variations in dominant tree species to water conditions in Northeast China. The results will provide basic information for scientific predictions of the future development trend of temperate forests in the eastern mountainous area of northeast China. We employed a high-precision dendrometer to continuously monitor the stem radial changes of six dominant tree species in temperate forests in northeast China from 15 April to 24 October in 2021. Precipitation significantly promoted the tree stem diameter increment. The increment of stem diameter in Juglans mandshurica Maxim., Quercus mongolica Fisch. and Betula platyphylla Suk. had a significantly positive correlation with cumulative precipitation. Correlation analysis revealed that the stem radial change (SRC) of six tree species was positively correlated with precipitation (Pre) and relative humidity (RH), and negatively correlated with water vapor pressure deficit (VPD), indicating that the diameter growth of the six tree species was mainly restricted by water conditions. Under drought stress, the stem radial growth rate of the six tree species slowed down, the growth duration decreased and the tree water deficit (TWD) value increased, while there were obvious interspecific differences. Therefore, water conditions limited the stem radial growth of the six tree species, while each tree species had a different response to drought stress.
Funder
National Natural Science Foundation of China
National Key Research Development Program of China
Reference44 articles.
1. IPCC (2014). Climate Change 2014: Mitigation of Climate Change. Contribution of Working Group III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Cambridge University Press.
2. Impacts of climate change on natural forest productivity—Evidence since the middle of the 20th century;Boisvenue;Glob. Chang. Biol.,2006
3. Global convergence in the vulnerability of forests to drought;Choat;Nature,2012
4. A Large and Persistent Carbon Sink in the World’s Forests;Pan;Science,2011
5. Role of forest regrowth in global carbon sink dynamics;Pugh;Proc. Natl. Acad. Sci. USA,2019