caa a22 4500 469097345 CHVBK 20180323133034.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF00317216 doi (NATIONALLICENCE)springer-10.1007/BF00317216 Long-term needle litterfall of a Scots pine Pinus sylvestris stand: relation to temperature factors [Elektronische Daten] [Jari Kouki, Tatu Hokkanen] Summary: Needle litterfall of a Scots pine was caught over 24 years (1962-1986) with litter-traps in a Scots pine stand in southeastern Finland. The age of the trees averaged 111 years in 1962. The stand was naturally recruited and only minor silvicultural treatments occurred during its history. Litterfall showed great year-to-year variation, the minimum being 18 g/m2 (in 1968) and maximum 213 g/m2 (in 1973). There was no overall trend in the amount of litterfall, and the age of the stand was thus not important in determining the needle fall. We used time domain time series analysis (ARIMA) and standard climatic data (temperature, precipitation) to investigate the relationship of litterfall to climatic factors. Mean July temperature was clearly correlated with needle litterfall. High temperature in July coincided with enhanced litterfall in the same and the next year. Litterfall enhanced litterfall in the same and the next year. Litterfall increased also after high temperatures during March-April, but only in the same year. In addition to these the litterfall had a 4-year self-dependency. This is approximately the same as the mean longevity of needles in the study area. Altogether the time series model we propose covers about 90% of the variance of the original time series. Springer-Verlag, 1992 Needle litterfall nationallicence Long-term nationallicence Pinus sylvestris nationallicence Kouki Jari Department of Zoology, University of Helsinki, P. Rautatiekatu 13, SF-00100, Helsinki, Finland aut Hokkanen Tatu Finnish Forest Research Institute, P.O. Box 18, SF-01300, Vantaa, Finland aut Oecologia Springer-Verlag 89/2(1992-02-01), 176-181 0029-8549 89:2<176 1992 89 442 https://doi.org/10.1007/BF00317216 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317216 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kouki Jari Department of Zoology, University of Helsinki, P. Rautatiekatu 13, SF-00100, Helsinki, Finland aut NATIONALLICENCE 700 1- Hokkanen Tatu Finnish Forest Research Institute, P.O. Box 18, SF-01300, Vantaa, Finland aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 89/2(1992-02-01), 176-181 0029-8549 89:2<176 1992 89 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer