Response of the relationship between radial growth and climatic factors to abrupt change of temperature along an altitudinal gradient on the northern slope of Changbai Mountain, Northeast China

The influence of climate on the radial growth of Japanese ash (Fraxinusmandshurica Rupr. var. japonica Maxim.) in northern Hokkaido, Japan, was investigated. Fifteen trees were selected and ring widths were measured. Standardization and autoregressive modeling were applied to the series of ring widths for isolation of the climatic signal. A response function was calculated for the relationship between residual chronology and monthly temperature and precipitation. In the season that preceded the growth, December precipitation is negatively correlated with ring width. During the growing season, May temperature is negatively correlated with ring width, while both temperature and precipitation in July are positively correlated with ring width. The results reveal the potential usefulness of Japanese ash for reconstruction of past climate in Hokkaido. The chronology of Japanese ash contributes to a development of a tree-ring network in Japan that is still sparse.

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Influence of the ecological conditions on the productive potential of grey alder

Šumarski list ◽

10.31298/sl.141.7-8.3 ◽

2018 ◽

Vol 141 (7-8) ◽

pp. 371-379 ◽

Cited By ~ 1

Author(s):

Michal Bugala ◽

Zuzana Parobeková ◽

Ján Parobek

Keyword(s):

Radial Growth ◽

Altitudinal Gradient ◽

Climatic Factors ◽

Basal Area ◽

Growing Season ◽

Influential Factor ◽

Decision Making Process ◽

Ecological Optimum ◽

Productive Potential ◽

Annual Volume

The aim of the study is to analyse the productive potential of grey alder (Alnus incana (L.) Moench) along an altitudinal gradient to verify coincidence ofproductive and ecological optimum and to identify climatic factors that control the growth. Along the altitudinal gradient of the river basin, dendrometric data has been analysed on the eight permanent research plots at the altitude of 525–705m. Correlations between standard chronology and average monthly climate characteristics were calculated for the period 1969–2015. Significant differences in the average basal area increments have been recognized among the investigated altitudinal zones. The highest basal area increment (1661±975mm2y-1) was detected in the zone of altitude 605m. and the average annual volume increment of the model grey alder stand was 4.59m3. The radial growth of grey alder has been positively affected only by the temperature of the current April and negatively by precipitation of the previous growing season. Based on the pointer year analysis can be claimed that condition of the root system is the most influential factor in relation to the radial growth and is dependent on water stress in the previous year. Investigated relationships may significantly influence decision making process in the forest management focused on grey alder re- or afforestation.

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