Provenance variation in Podocarpus totara (D. Don): Growth, tree form and wood density on a coastal site in the north of the natural range, New Zealand

Bergin, D. O.; Kimberley, Mark O.; Low, C. B.

doi:10.1016/j.foreco.2007.10.053

Cited by 18 publications

(21 citation statements)

References 10 publications

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“…Where this is not available, a long-term option for landowners is to establish banks of seed trees throughout areas where totara regeneration may be desired. Well-managed totara established on reasonable sites will produce viable seed within 10 years of planting (Bergin et al 2008). The role of totara seed sources and the intensity of seedfall required to allow the species to regenerate naturally in grassland, including the potential to establish totara seed sources on key sites across marginal pastoral hill country, should be the subject of further research.…”

Section: Discussionmentioning

confidence: 99%

Factors influencing natural regeneration of totara (Podocarpus totara D.Don) on grazed hill country grassland in Northland, New Zealand

Bergin

Kimberley

2014

N.Z. j. of For. Sci.

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Section: Discussionmentioning

confidence: 99%

Factors influencing natural regeneration of totara (Podocarpus totara D.Don) on grazed hill country grassland in Northland, New Zealand

Bergin

Kimberley

2014

N.Z. j. of For. Sci.

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“…Podocarps are slower growing than other commercially valuable timber species (Bergin, 2000). For example, Podocarpus totara seedlings with an initial mean height of 0.85 m reached just 2.9 m after 6 years and 5.5 m after 11 years in a provenance trial on fertile soils under frost-free conditions (Bergin et al, 2008), whereas Pinus radiata reaches heights up to 30 m after 17 years (Beets and Kimberley, 1993). Seedlings of Lagarostrobos franklinii in Tasmania grow at just 2.3 cm yr -1 , approximately a third of the rate of the angiosperm tree Eucryphia milliganii, which grows in nearby forests (Jennings et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Temperate and Tropical Podocarps: How Ecologically Alike Are They?

Coomes¹,

Bellingham²

2011

Smithsonian Contributions to Botany

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With few exceptions, podocarps are specialists of nutrient-poor soils within temperate and tropical rainforests. They are locally abundant in some tropical mountains, especially near the tree line, and in the lowland tropics most are confined to heathlands and impoverished habitats, although some can persist in forest understories. The ecology of tropical podocarps is not well understood, so here we draw on literature from temperate regions to help characterize their niches. Temperate podocarps are effective at capturing and retaining nutrients at the expense of competitors. They are universally slow growing, but this is not necessarily an encumbrance on poor soils because competition for light is relatively weak. Temperate podocarps are often outcompeted on richer soils because several factors stack against them: they are ill equipped to compete with angiosperms in the race to occupy canopy gaps, there may be few sites for their establishment on the forest floors, and continuous regeneration by podocarps is seldom found in the forest understory because their growth is severely hampered by shading. We suggest that competition excludes imbricate-leaved podocarps from most lowland tropical forests, whereas broad-leaved species with anastomosing veins (Nageia and some Podocarpus) are so shade tolerant that they regenerate beneath closed canopies.

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“…Chave et al (2006b) and Moser et al (2008) reported that wood density correlates negatively or neutrally with elevation. Numbers of other authors reported that there were no correlations between geo-climatic variables and bark thickness (Warrall 1974;Wright 1987;Bergin et al 2007).…”

Section: Resultsmentioning

confidence: 99%

Variations in bark thickness and sapwood density of Calophyllum inophyllum provenances in Australia and in Sri Lanka

Hathurusingha

Ashwath

2011

Journal of Forestry Research

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Sapwood density and bark thickness of Calophyllum inophyllum L. (a multipurpose durable timber species) were studied in various locations in Northern Australia and in Sri Lanka. Measurements were taken non-destructively by using core sampling and bark gauge. From each provenance, 4-15 mature trees having girth at breast height over bark (GBHOB) at 100-150 cm were selected on the basis of the population size. Significant (p<0.05) hemispheric and provenance variations in bark thickness were found. Variations in the bark thickness are influenced by environmental variables. Variations in sapwood density were less pronounced compared to that of bark thickness. Variations in sapwood density are likely to be governed by genotypic variations.

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Provenance variation in Podocarpus totara (D. Don): Growth, tree form and wood density on a coastal site in the north of the natural range, New Zealand

Cited by 18 publications

References 10 publications

Factors influencing natural regeneration of totara (Podocarpus totara D.Don) on grazed hill country grassland in Northland, New Zealand

Factors influencing natural regeneration of totara (Podocarpus totara D.Don) on grazed hill country grassland in Northland, New Zealand

Temperate and Tropical Podocarps: How Ecologically Alike Are They?

Variations in bark thickness and sapwood density of Calophyllum inophyllum provenances in Australia and in Sri Lanka

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