alexa Presettlement and modern disturbance regimes in coast redwood forests: Implications for the conservation of old-growth stands.
Environmental Sciences

Environmental Sciences

Journal of Ecosystem & Ecography

Author(s): Lorimer CG, Porter DG, Madej MA, Stuart JD, Veirs SD Jr, Norman SP, OHara KL, Libby WJ

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Coast redwood (Sequoia sempervirens), a western North American conifer of ancient lineage, has a paradoxical combination of late-successional characteristics and strong adaptations to disturbance. Despite its shade tolerance and heavy dominance of the canopy on many sites, redwood saplings are uncommon in upland old-growth stands. Information needed to ensure the conservation of old-growth redwood forests has been limited. In this review paper, we integrate evidence on redwood biology with data on the historic and modern disturbance regimes to help clarify the degree to which key attributes of redwood forests may have been dependent upon periodic disturbance. Available evidence suggests that episodes of fire, flooding, and slope failure prior to European settlement were frequent but predominantly of low to moderate severity and extent, resulting in broadly uneven-aged forests. The majority of fires prior to European settlement were apparently of human origin. Frequency and severity of the major disturbance agents have been radically changed in modern times. Fires have been largely excluded, and flooding has been altered in ways that have often been detrimental to old-growth redwoods on alluvial terraces.

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This article was published in Forest Ecology and Management and referenced in Journal of Ecosystem & Ecography

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