Comparisons of recruitment, survival, and growth in invasive and native saplings on a volcano

Akasaka, Munemitsu; Tsuyuzaki, Shiro

doi:10.1007/s11258-008-9464-4

Cited by 9 publications

(3 citation statements)

References 43 publications

(49 reference statements)

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“…The recovery of the vegetation was slow, and the amount of bare ground increases with increasing elevation. Four major habitats were recognized for plant colonization (Uesaka and Tsuyuzaki, 2004;Akasaka and Tsuyuzaki, 2009): G. miqueliana patches (hereafter Gaultheria patches), the Larix kaempferi understory (Larix understory), the Salix reinii patches (Salix patches) and bare ground. The former three habitats were vegetated with the respective vascular plants, and the bare ground was covered with mosses and lichens, or with nothing.…”

Section: Study Sites and Plant Materialsmentioning

confidence: 99%

“…The roles of the thrush in seed dispersal are different from the roles of the hare. Furthermore, small seeds, such as G. miqueliana seeds, are carried by strong winds, particularly from the bare ground (Akasaka and Tsuyuzaki, 2009). Because the seeds in pellets are immobilized, the seeds stored in pellets provide a supply of seeds to the habitats over the long term.…”

Section: Relationships Between Hare and G Miquelianamentioning

confidence: 99%

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Hares promote seed dispersal and seedling establishment after volcanic eruptions

Nomura

Tsuyuzaki

2015

Acta Oecologica

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2Although seed dispersal through animal guts (endozoochory) is a process that determines plant 3 establishment, the behavior of carriers mean that the seeds are not always dispersed to suitable 4 habitats for germination. The germinable seeds of Gaultheria miqueliana were stored in the pellets weeks after the sowing of seeds, independent of cold stratification, when light was sufficient and the 12 water potential was low. The seeds did not germinate at high water potential. The pellets were 13 gradually degraded in situ. More seeds germinated from crushed than from intact pellets.14 Therefore, over the long term, seeds germinated when exposed to light due to the degradation of represented by the hare and the shrubs that produce berries are likely to be more mutually evolved 22 than was previously thought.

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Section: Study Sites and Plant Materialsmentioning

confidence: 99%

Section: Relationships Between Hare and G Miquelianamentioning

confidence: 99%

Hares promote seed dispersal and seedling establishment after volcanic eruptions

Nomura

Tsuyuzaki

2015

Acta Oecologica

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“…Carr. (larch), conspicuously recruited seedlings using willow patches, and currently comprises the predominant forest species (Akasaka and Tsuyuzaki 2009). The biological invasion of larch trees followed the development of willow shrub patches.…”

Section: Introductionmentioning

confidence: 99%

Differences in nitrogen redistribution between early and late plant colonizers through ectomycorrhizal fungi on the volcano Mount Koma

Kwon

Tsuyuzaki

2016

Ecological Research

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Relationships involving the transfer of nitrogen (N) among Salix reinii (willow), Larix kaempferi (larch), and mycorrhizal fungi were investigated in a ridge and hillslope on the volcano Mount Koma in northern Japan using a two‐pool fungal model. This model estimated N transfer among the examined taxa by measuring changes in the stable isotope ratio of N (δ15N). Although N content in tephra was low at both sites, it was higher on the ridge than on the hillslope, and higher in the willow patch than on bare ground or in the larch understory. The non‐mycorrhizal sedge (Carex oxyandra) exhibited non‐significant differences between the two sites regarding δ15N for N obtained from tephra. Larches developed a relationship with larch‐specific Suillus mycorrhizal fungal species in the roots, and had a lower foliar δ15N on the hillslope than on the ridge. The larch δ15N increased during the growing season, while the willow δ15N remained stable. The dependence of larch on mycorrhizal fungi for N uptake was 3–5 % on the ridge and 56–76 % on the hillslope in autumn. Therefore, larches exhibited a flexible symbiotic relationship with mycorrhizal fungi for obtaining N. Over 45 % of the N taken up by willow plants was obtained from mycorrhizal fungi at both sites. In conclusion, willow plants promoted N deposition in tephra through the litter supply, and formed a stable relationship with mycorrhizal fungi. This enabled successful revegetation with larch plants, which exhibited flexibility in terms of N uptake (i.e., dependent on mycorrhizae or from tephra).

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Elements and ectomycorrhizal symbiosis affecting the growth of Japanese larch seedlings regenerated on slopes of an active volcano in northern Japan

Kayama

Koike

2015

Trees

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Key message The growth of Japanese larch seedlings is regulated by the presence of nutrients as well as ectomycorrhizal symbiosis. Abstract The mountain slope of an active volcano is a severe environment for the regeneration of larch (Larix kaempferi Sarg. hereafter larch) seedlings. To determine parameters affecting the growth of larch seedlings, we analyzed stoichiometry of elements in the soils and plant organs, ectomycorrhizal (ECM) colonization, and photosynthetic abilities. These parameters were compared with two different elevations. From nutrient analysis of plant organs from larch seedlings grown on the slope of a volcano, potassium (K) was insufficient compared with the seedlings grown in other habitats. Symbiosis with ECM fungi enabled the uptake of nutrients, especially phosphorous (P) and nitrogen (N). The main factor affecting the differences in relative height growth rate (RHGr) of larch was attributed to ECM colonization. There was a positive relationship between ECM colonization and concentrations of P or N in needles. Larch seedlings with high rates of ECM colonization showed high concentrations of P and N, and had high photosynthetic rates. At lower elevation sites, concentrations of N and K in needles were low with high density of individuals. Moreover, larch showed a high accumulation of aluminum (Al) and iron (Fe) even though the amount of these elements in the soil was small. These seedlings exhibited a suppressed photosynthetic rate and RHGr. Symbiosis with ECM fungi could suppress the excessive uptake of Al and Fe.

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Comparisons of recruitment, survival, and growth in invasive and native saplings on a volcano

Cited by 9 publications

References 43 publications

Hares promote seed dispersal and seedling establishment after volcanic eruptions

Hares promote seed dispersal and seedling establishment after volcanic eruptions

Differences in nitrogen redistribution between early and late plant colonizers through ectomycorrhizal fungi on the volcano Mount Koma

Elements and ectomycorrhizal symbiosis affecting the growth of Japanese larch seedlings regenerated on slopes of an active volcano in northern Japan

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