Seed Banks and Vegetation Processes in Coniferous Forests

Archibold, O. W.

doi:10.1016/b978-0-12-440405-2.50012-9

Cited by 43 publications

(38 citation statements)

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“…Some plants produce seeds that are a transient part of the seedbank, such as willow, which may remain viable for only a few weeks. There is little or no annual carryover of pine seed in soil seedbanks (Pratt and others 1984), and few conifer seeds are present in the forest floor of a mature forest (Archibold 1989;Ingersoll and Wilson 1990;Kramer and Johnson 1987). Many seeds, particularly large ones, are lost from the seedbank by predation.…”

Section: Seedbankmentioning

confidence: 99%

“…Species present in the seedbank of mature deciduous (Pickett and McDonnell 1989) and coniferous forests (Archibold 1989) are often shade-intolerant, early seral species, which may not be present in the overstory or understory. Few large seeded or shade tolerant species reside for long in the deciduous forest seedbank (Pickett and McDonnell 1989).…”

Section: Seedbankmentioning

confidence: 99%

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Wildland fire in ecosystems: effects of fire on flora

Brown¹,

Smith²

2000

299

156

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_____________________________________This state-of-knowledge review about the effects of fire on flora and fuels can assist land managers with ecosystem and fire management planning and in their efforts to inform others about the ecological role of fire. Chapter topics include fire regime classification, autecological effects of fire, fire regime characteristics and postfire plant community developments in ecosystems throughout the United States and Canada, global climate change, ecological principles of fire regimes, and practical considerations for managing fire in an ecosytem context.

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Section: Seedbankmentioning

confidence: 99%

Section: Seedbankmentioning

confidence: 99%

Wildland fire in ecosystems: effects of fire on flora

Brown¹,

Smith²

2000

299

156

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“…The gradual development and sparse distributions of most species (90% of taxa were present in ,5% of temporal samples) point to propagule availability and seed dispersal as critical determinants of post-fire patterns (Keeley et al 2003). As in many coniferous forests, few understory species maintain persistent seed banks (Archibold 1989, Halpern et al 1999, Keeley et al 2003. Thus post-fire development is dependent either on vegetative recovery or dispersal from source populations.…”

Section: Long-term Effects On Vegetationmentioning

confidence: 99%

Long‐term vegetation responses to reintroduction and repeated use of fire in mixed‐conifer forests of the Sierra Nevada

Webster

Halpern

2010

Ecosphere

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Abstract. Nearly a century of fire suppression has changed fundamental aspects of the structure and functioning of fire-adapted forests throughout the western U.S. Prescribed fire is increasingly used to restore forest structure and reduce surface fuels with limited consideration of its consequences for biological diversity. In this study, we used more than two decades of data from permanent plots in mixedconifer forests of Sequoia and Kings Canyon National Parks, California, to explore changes in plant diversity and abundance following reintroduction and repeated use of fire. Data on stand structure, fuel loading, fire severity and heterogeneity, and the richness and abundance of major growth forms were collected on 51 plots representing one of three treatments: control, first-entry burn, and second-entry burn. Understories showed distinct compositional changes over time in first-and second-entry burns. Burned plots supported more than twice as many species as controls 10 yr after treatment; first-entry plots showed a nearly threefold increase in richness by year 20. Burned plots supported four to five times as many shrub species as controls 5-10 yr after burning. Total plant cover (dominated by perennial forbs and shrubs) increased in first-entry plots, but did not differ from controls until 20 yr after treatment. Following secondentry, cover did not change through final sampling (year 10). Nonnative species were rare, occurring in only three plots at low abundance. Higher severity fires led to greater numbers of species and to greater plant cover. Species richness was not correlated with burn heterogeneity. Long-term observations suggest that reintroduction of fire in previously unmanaged forests can gradually enhance the diversity and abundance of understory species. Repeated burning-necessary to achieve structural and fuel-reduction objectives-does not appear to have a detrimental effect on plant diversity and may enhance the distributions of species that are adversely affected by fire exclusion. If fire is to play an important role in restoration, however, it will need to be maintained as a frequent and spatially dynamic process on the landscape.

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“…Elles sont associées à des milieux perturbés en régénération (Victorin, 1964). Archibold (1989) mentionne que les espèces dominantes des forêts conifériennes sont rarement caractérisées par un réservoir abondant de graines viables enfouies, mais les espèces de début de succession y sont bien représentées. D'autre part, certains auteurs mentionnent une similitude entre le réservoir de graines et la végétation de surface (Leck et Graveline, 1979;Pratt et al, 1984).…”

Section: Correspondance Entre La Végétation De Surface Et Les Grainesunclassified

“…Bewley et Black (1985) expliquent cette différence non pas par la quantité de réserves qui devient insuffisante pour maintenir la viabilité de l'embryon, mais par un défaut d'approvisionnement en enzyme qui ne permet plus l'exploitation de ces réserves. Les conifères ont des graines relativement grosses et ne maintiennent généralement pas plus d'un an des réservoirs de graines viables dans le sol (Olmstead et Curtis, 1947;Fowells, 1965;Frank et Safford, 1970;Johnson, 1975;Elliot, 1979;Archibold, 1989).…”

Section: Classification Des Espècesunclassified

Reservoir de graines des sols de sapinieres boreales au nord du Lac Saint-Jean

Ibarzabal¹

1994

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Seed Banks and Vegetation Processes in Coniferous Forests

Cited by 43 publications

References 0 publications

Wildland fire in ecosystems: effects of fire on flora

Wildland fire in ecosystems: effects of fire on flora

Long‐term vegetation responses to reintroduction and repeated use of fire in mixed‐conifer forests of the Sierra Nevada

Reservoir de graines des sols de sapinieres boreales au nord du Lac Saint-Jean

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