Recovery of a <i>Sasa tsuboiana</i> population after mass flowering and death

Makita, Akifumi; Konno, Yasuo; Fujita, Noboru; Takada, Ken; Hamabata, Etsuji

doi:10.1007/bf02348534

Cited by 36 publications

(31 citation statements)

References 8 publications

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“…Dwarf bamboo, Sasa, is a typical undergrowth vegetation type that could have an effect on forest dynamics; it occurs widely in beech forests in Japan (Shidei 1974). Accepted 26 October 1995. death (Makita 1992;Makita et al 1993) or the associated dynamics of beech (Fagus crenata Blume) seedlings (Nakashizuka 1988). Because this natural phenomenon occurs rarely, the relationship between Sasa undergrowth and forest dynamics has never been fully understood despite the efforts of many researchers; few studies have investigated the regeneration process of Sasa species after their simultaneous Received 17 January 1995.…”

Section: Introduc~onmentioning

confidence: 99%

Gnawing damage by rodents to the seedlings of Fagus crenata and Quercus mongolica var. grosseserrata in a temperate Sasa grassland‐deciduous forest series in southwestern Japan

Ida¹,

Nakagoshi²

1996

Ecological Research

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The effects of dwarf bamboo, Sasa, cover on the initial mortality of hardwood seedlings were investigated by transplanting 1-year-old beech (Fagus crenata) and current-year oak (Quercus mongolica vat. grosseserrata) seedlings to three different stands; old-growth beech and secondary oak forests with Sasa undergrowth, and a Sasa grassland in a grassland-forest series near the top of Mt Jippo, southwestern Japan. The most frequent cause of seedling mortality was gnawing of the stems by rodents. In the beech forest, the gnawing was more likely to occur under Sasa cover, suggesting that it provides a good habitat for rodents on the beech forest floor. The Sasa undergrowth may thus play an important role in regeneration of beech forest. In the oak forest, mortality of both species was low and only a little gnawing occurred during a year. However, no natural oak seedlings were found in the forest even after a mast year. This may be because most of the acorns disappeared before establishment. The eariy-stage demography of hardwood seedlings such as oak may thus play an important role in regeneration of oak forest. In the Sasa grassland where the seed supply is small, almost all of the seedlings died from gnawing regardless of the presence of Sasa cover. These factors prevent the recruitment of a sizable seedling bank. Rodents may thus play an important role in maintenance of the Sasa grassland.

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Section: Introduc~onmentioning

confidence: 99%

Gnawing damage by rodents to the seedlings of Fagus crenata and Quercus mongolica var. grosseserrata in a temperate Sasa grassland‐deciduous forest series in southwestern Japan

Ida¹,

Nakagoshi²

1996

Ecological Research

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“…kurilensis (Makita 1992) and S . tsuhoiana (Makita et al 1993). Their populations had not reached the optimal weight-density combination during the observed period.…”

Section: Densipweight Relationship In Rametsmentioning

confidence: 93%

“…5). Many seedlings of S. tsuhoiana in the open habitat extended rhizomes from the second year after germination, and even in the seedlings grown under the woodland canopy, about half had developed rhizomes by the spring of the fourth year (Makita et al 1993). The proportion of culms produced by tillering from the original clumps became lower as the rhizomes extended, and most culms were derived from rhizome buds in 1988 (Fig.…”

Section: Rhizome Dei3elopmentmentioning

confidence: 99%

“…Regeneration processes in clonal plants have mostly been studied in experimental populations and only for a short period (Langer et al 1964;Liddle et al 1982;Callaghan et al 1990). There have been few investigations on natural populations from the establishment phase (Hartnett & Bazzaz 1985a;Makita 1992;Makita et al 1993). Furthermore, how ramet density is determined during the regeneration process has hardly been studied in natural populations.…”

Section: Introductionmentioning

confidence: 99%

“…In previous papers, I demonstrated the population dynamics of two bamboos, Sasa kurilerzsis and S . tsuhoiarza for over 10 yr during regeneration after mass flowering (Makita 1992;Makita et al 1993). Both species are long-lived and monocarpic: they flower and then they die simultaneously over a wide area so that new populations are formed by even-aged seedlings.…”

Section: Introductionmentioning

confidence: 99%

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Density regulation during the regeneration of two monocarpic bamboos: self‐thinning or intraclonal regulation?

Makita

1996

J Vegetation Science

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The population dynamics of two monocarpic bamboos, Sasa kurilensis and S. tsuboiana, were studied for more than 10 years after establishment following mass flowering. Both species show vigorous rhizomatous vegetative reproduction after growing up to maturity, but horizontal expansion in the seedling stage was much more vigorous in S. tsuboiana than in S. kurilensis. The pattern of changes in culm density in the two species was strikingly similar: culm densities of both species increased until they reached full-density states, after which they decreased in accordance with seedling growth. However, the mode of regulation in culm density was different. S. kurilensis seedlings were composed of only a few culms and scarcely extended their rhizomes during the observation period. Such poor lateral expansion resulted in asymmetric competition as observed in many non-clonal plants, and consequently their culm density decreased as a result of the mortality of genets due to self-thinning. In S. tsuboiana seedlings, the number of culms per genet increased considerably by frequent tillering and sprouting from rhizomes. However, after reaching full density state, the Bud Utility Ratio (BUR), (the proportion of the rhizome nodes with culms to the total number of rhizome nodes), decreased drastically. In this manner, S. tsuboiana regulated culm density intraclonally as is observed in the stable states of many clonal plants. Hence it is important for the understanding of the regeneration process in clonal species to clarify when and how their seedlings extend rhizomes during their growth.

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Revegetation patterns and seedbank structure on abandoned pastures in northern Japan

Tsuyuzaki

Kanda

1996

American J of Botany

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To compare revegetation patterns between native and exotic species on abandoned pastures in northern Japan, we surveyed the vegetation structure and the seedbank using a flotation technique in 140 1 1 m plots. Previously introduced grasses such as Poa pratensis, Phleum pratense, and Dactylis glomerata were abundant 20 yr after the pasture abandonment, while Sasa senanensis, native shrub species, regenerated from propagation that had spread from the surrounding forests. S. senanensis shrublands and P. pratensis/P. pratense grasslands established on deep soils while D. glomerata grasslands established on shallow soils. Trees rarely became established on abandoned pastures. The seed density in the seedbank, representing 19 species, ranged from 542 to 2957 seeds/m2. The dominant species in the vegetation (P. pratensis, Trifolium repens, and Rumex acetosella) were also common in the seedbank, whereas Cerastium holosteoides var. angustifolium, Chenopodium album var. centrorubrum, and Erigeron canadensis were widespread in the seedbank but did not occur in the extant vegetation. S. senanensis regenerated by vegetative propagation, and P. pratensis and P. pratense developed a seedbank. We concluded that for native species, particularly S. senanensis, vegetative reproduction has an important role on revegetation rather than regeneration from the seedbank, and the dwarf bamboo may be a keystone species in the ecosystems.

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Recovery of a Sasa tsuboiana population after mass flowering and death

Cited by 36 publications

References 8 publications

Gnawing damage by rodents to the seedlings of Fagus crenata and Quercus mongolica var. grosseserrata in a temperate Sasa grassland‐deciduous forest series in southwestern Japan

Gnawing damage by rodents to the seedlings of Fagus crenata and Quercus mongolica var. grosseserrata in a temperate Sasa grassland‐deciduous forest series in southwestern Japan

Density regulation during the regeneration of two monocarpic bamboos: self‐thinning or intraclonal regulation?

Revegetation patterns and seedbank structure on abandoned pastures in northern Japan

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