The Reproductive Capacity of Fraxinus Excelsior on the Derbyshire Limestone

Gardner, Geoffrey

doi:10.2307/2259066

Cited by 61 publications

(37 citation statements)

References 11 publications

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“…An additional interest of our experiment is the possibility for foresters to use part of our sterilisation procedure in order to test the quality of ash seed lots. Ash seeds are very often damaged by fungi or insects [2]. For example, the seeds of some lots we used in this study were destroyed over 60% (data not shown).…”

Section: Discussionmentioning

confidence: 79%

Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.)

Raquininsta

Jung-Muller

Dufour³

et al. 2002

Ann. For. Sci.

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-Three different dissection treatments were applied to mature seeds of two European ash species: Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.) in order to compare their relative efficiency for germination and further development. The in vitro embryo culture appeared to be the most efficient for both species (nearly 90% of viable plants). The two species expressed differences in germination rate without embryo culture.

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Section: Discussionmentioning

confidence: 79%

Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.)

Raquininsta

Jung-Muller

Dufour³

et al. 2002

Ann. For. Sci.

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“…The relationship between predation and emergence must be directly addressed as in Anderson (1987), Sork (1987), and Borchert et al (1989). While Fagus sylvatica appears to disproportionately satiate its predators in mast years (Jensen 1982, Nilsson and Wastljung 1987, Wastljung 1988, there is no evidence that proportional seed survival increases with seedfall in five species of conifers (Gashwiler 1967), five species of Quercus (Shaw 1968a, b, Silvertown 1980 data from Christisen andKorschgen 19 55), Fraxinus excelsior (Gardner 1977), Carya glabra (Sork 1983), Macrozamia communis (Ballardie and Whelan 1987) or Gustavia superba (Sork 1987). Continued monitoring of the seedling cohorts marked during the present study will shed light on this aspect of the population dynamics of Faramea.…”

Section: Seed Predationmentioning

confidence: 99%

Annual Variation in Seedfall, Postdispersal Predation, and Recruitment of a Neotropical Tree

Schupp¹

1990

Ecology

211

138

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Knowledge of the dynamics of seed production and seedling recruitment of individual tree species is crucial for a complete understanding of tropical forest dynamics, yet multiyear studies on the seed and young seedling stages of tropical trees are virtually nonexistent. In a 4-yr study of the understory tree Faramea occidentalis on Barro Colorado Island, Panama, I quantified natural levels of viable seedfall, seedling emergence, and seedling establishment, and experimentally estimated postdispersal seed predation.The levels of viable seedfall, seed predation, seedling emergence, early seedling survival, and seedling recruitment all differed significantly among years. The proportion of fallen seeds destroyed by predators before germination was not related to the quantity of F. occidentalis seedfall. Within a year, however, F. occidentalis seed predation appeared to be influenced by community-wide seedfall, with high predation rates during times of low seed abundance and very low predation during the late dry season peak in seedfall by the community. Most of the annual variation in recruitment can be explained by the combination of seedfall and seed predation; in 3 of the 4 yr seedling emergence could be predicted from a knowledge of viable seedfall and the probability of a seed surviving until the peak of germination. The 4th yr, however, demonstrated that environmental conditions provide a sporadic, though important, limitation to recruitment. In comparison to many tree species, early seedling survival was relatively high, as was the ratio of seedlings recruited per seed falling. The highly successful recruitment of F. occidentalis is associated with a high population density of both saplings and adults in the study area.

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“…We used two CVs (CV pt and CV it ) to estimate variability in seed production among individual trees. It is generally accepted that dominant trees with large crowns produce the most seed, but there is considerable intraspecific variation in the seed-bearing capacity of individual trees; even in good seed years, not all trees of seed-bearing age produce a crop (Matthews 1955;Gardner 1977). Seed production is affected by various factors such as microsite conditions (Healy et al 1999), plant density (Allison 1990), and tree size (Kanazawa 1982;Kamitani 1986;Herrera 1991).…”

Section: Discussionmentioning

confidence: 99%

Variation in seed production among years and among individuals in 11 broadleaf tree species in northern Japan

Yasaka

Takiya

Watanabe

et al. 2008

Journal of Forest Research

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Seed production is the most problematic part of tree regeneration and is the least amenable to control by silvicultural management. Understanding variability in seed production among years and among trees will allow better planning of seed collection for seedling production and natural regeneration. We estimated the extent of variability in seed production among years and within years among individual trees. Specifically, we measured individual annual seed production in 11 woody species in Hokkaido, northern Japan. We analyzed the coefficient of variation (CV) of seed production among years and among individual trees. We used population-and individual-based CVs (CV pt and CV it ) to estimate the variability in seed production among individual trees. Alnus hirsuta, in which these CVs among trees were maximal, will require further analyses of the spatial patterns of seed production among individual trees. Additionally, we used population-and individual-based CVs (CV py and CV iy ) to estimate the variability in seed production among years. The CV iy was statistically higher than CV it in 2 of the 11 species: Betula maximowicziana and Sorbus alnifolia. Activities for the regeneration of these species should regard the annual variation in seed production as more important than individual variation. For the nine species in which CV it was similar to CV iy ; even if seed production by specific trees was not sufficient for regeneration in a particular year, other trees or stands often had high seed production in that year. We discuss the relative importance of annual and individual variability in determining efficient methods for artificial and natural regeneration of these woody plant species.

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The Reproductive Capacity of Fraxinus Excelsior on the Derbyshire Limestone

Cited by 61 publications

References 11 publications

Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.)

Rapid seedling obtaining from European ash species Fraxinus excelsior (L.) and Fraxinus angustifolia (Vahl.)

Annual Variation in Seedfall, Postdispersal Predation, and Recruitment of a Neotropical Tree

Variation in seed production among years and among individuals in 11 broadleaf tree species in northern Japan

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