Nitrogen acquisition, net production and allometry of Alnus fruticosa at a young moraine in Koryto Glacier Valley, Kamchatka, Russian Far East
- 49 Downloads
Alders (Alnus spp.) often dominate at nutrient-poor sites by symbiotic relations with atmospheric nitrogen-fixing bacteria. However, little is known about quantitative relationships between root nodule as a nitrogen acquisition organ and leaf as a carbon acquisition organ. To examine carbon allocation, nitrogen acquisition and net production in nutrient-poor conditions, we examined allocation patterns among organs of shrub Alnus fruticosa at a young 80-year-old moraine in Kamchatka. Slopes of double-log allometric equations were significantly smaller than 1.0 for the root mass, leaf mass and root nodule mass against stem mass, and for the root nodule mass against root mass, indicating that smaller individuals invested disproportionally more biomass into resource-acquiring leaf and root tissues than to supportive tissues compared to older individuals. The slope of allometric equation of root depth against stem height was 0.542, indicating that smaller/younger individuals allocate disproportionally more biomass into root length growth than stem height growth. On the contrary, the root nodule mass isometrically scaled to leaf mass. The whole-plant nitrogen content also isometrically scaled to root nodule mass, indicating that a certain ratio of nitrogen acquisition depended on root nodules, irrespective of plant size. Although the net production per plant increased with the increase in stem mass, the slope of the double-log regression was smaller than 1.0. On the contrary, the net production per plant isometrically increased with leaf mass, root nodule mass and leaf nitrogen content per plant. Since the leaf mass isometrically scaled to root nodule mass, growth of each individual occurred at the leaves and root nodules in a coordinated manner. It is suggested that their isometric increase contributes to the increase in net production per plant for A. fruticosa in nutrient-poor conditions.
KeywordsAllometry Deglaciation Growth Isometry Primary succession Root nodule
We would like to express our sincere thanks to Alexander Ovsyannikov, Marina P. Vyatkina, Sergey Florenzev and Nikolai V. Kazakov for their support of our study. This study was supported by the COE fellowship of the Institute of Low Temperature Science, Hokkaido University, provided by the Ministry of Education, Science, Sports and Culture of Japan. JD was supported by GACR 17-19376S.
- Kira T (1948) On the altitudinal arrangement of climate zones in Japan. Kanti Nogaku 2:143–173 (in Japanese)Google Scholar
- Kodama Y, Shiraiwa T, Kobayashi D, Matsumoto T, Yamaguchi S, Muravyev YD, Glazirin GE (1996) Hydrometeorological and glaciological observations in the Koryto and Ushkovsky Glaciers, Kamchatka, 1996. Low Temperature Sci. Hokkaido Univ Ser A 55:107–136Google Scholar
- Minchin FR, Witty JF (2005) Respiratory/carbon costs of symbiotic nitrogen fixation in legumes. In: Lambers H, Ribas-Carbo M (eds) Plant respiration. Advances in photosynthesis and respiration, vol 18. Springer, DordrechtGoogle Scholar
- Muravyev YD, Shiraiwa T, Yamaguchi S, Matsumoto T, Nishimura K, Kohshima S, Ovsyannikov AA (1999) Mass balance of glacier in condition of maritime climate-Koryto Glacier in Kamchatka, Russia. Cryospheric Stud Kamchatka II:51–61Google Scholar
- Sawaguchi S, Yamagata K, Muravyev YD, Solomina ON (1999) Holocene glacier advances in Koryto Glacier, Kamchatka, Russia. Cryospheric Stud Kamchatka II:79–84Google Scholar
- Shiraiwa T, Muravyev YD, Yamaguchi S, Glazirin GE, Kodama Y, Matsumoto T (1997) Glaciological features of Koryto Glacier in the Kronotsky Peninsula, Kamchatka, Russia. Bull Glacier Res 15:27–36Google Scholar
- Vinogradov VN (1968) Katalog Lednikov SSSR, t.20. Kamchatka, ch.2–4 (Catalog of the glaciers of the USSR, vol 20, Kamchatka, Pt. 2–4), Gidrometeoizdat, Leningrad (in Russian) Google Scholar
- Warton DI, Wright IJ, Falster DS, Westoby M (2006) Bivariate line fitting methods for allometry. Biol Rev 33:1–33Google Scholar
- Yamagata K, Sawaguchi S, Muravyev YD, Solomina ON (1999) Soil development in relation to vegetation and topography at the Koryto Glacier basin, Kamchatka. Cryospheric Stud Kamchatka II:85–92Google Scholar