Factors influencing tree colonization in fragmented forests: an experimental study of introduced seeds and seedlings

Hewitt, Nina; Kellman, Martin

doi:10.1016/j.foreco.2003.11.003

Cited by 32 publications

(31 citation statements)

References 54 publications

(62 reference statements)

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“…First-year seedling density increased with distance from the edge, as has been found in other temperate forests (Goldblum and Beatty, 1999). But species are expected to respond differently to edge influence according to their shade tolerance (Harper et al, 2005), with abundance of seedlings of early successional (shade-intolerant) species decreasing and abundance of late-successional (shadetolerant) species increasing with distance from the edge (Gehlhausen et al, 2000;Hewitt and Kellman, 2004;Matlack, 1993;Ranney et al, 1981). The patterns found here for mid and mid-to-late successional groups (Fig.…”

Section: Spatial Pattern According To the Distance From The Forest Edgementioning

confidence: 70%

“…This is an important intra-forest factor, which has been previously shown to influence the spatial pattern of seedlings and saplings in fragmented forests (Gehlhausen et al, 2000;Hewitt and Kellman, 2004;Matlack, 1993;Ranney et al, 1981). Opposed spatial patterns for successional groups according to the distance from the edge have been observed: "early successional species or disturbancetolerant (shade-intolerant) species have higher seedling densities at the forest edge, while the seedling densities of "interior" species (shade-tolerant) abruptly diminish near the edge" (Marchand and Houle, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Diversity of woody plant seedling banks under closed canopy in fragmented coppice forests

et al. 2008

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-• Seedling banks of woody species established under closed canopy have received little consideration in coppice forests despite their potential importance for natural regeneration.• This study aimed to evaluate the influences of canopy composition and of distance from the nearest forest edge on the abundance and species richness of the seedling bank, for different ecological groups of seedlings (age, successional status and dispersal vector) in 68 fragmented coppice stands.• Seedlings were found in 67 stands, with 19 species identified. Eight species present as older seedlings were lacking as first-year old seedlings, suggesting temporal variability of species recruitment. Seedling abundances of species with low-dispersal ability were positively correlated with the abundances of their conspecific adults. Seedling abundance of mid-successional species was negatively correlated with the distance from the nearest forest edge, while mid-to-late successional species seedling abundance presented the opposite pattern.• Our results showed that woody species were able to establish frequently under closed canopy in these fragmented coppices and form a seedling bank which may be used for natural regeneration.woody seedling bank / Quercus spp. / forest edge / Southwest France / coppices Résumé -Une banque de semis diversifiée sous canopée fermée dans des taillis fragmentés.• Peu d'études ont porté sur les banques de semis de ligneux installés sous canopée fermée dans des taillis, malgré leur importance potentielle pour la régénération naturelle.• Nous avons exploré le lien entre l'abondance et la richesse des semis de ligneux, et la composition de la canopée et la distance à la lisière la plus proche, dans 68 peuplements gérés en taillis. Les semis ont été regroupés en fonction de leur âge, et les espèces en fonction de leur mode de dispersion et de leur place a priori dans la succession forestière.• Nous avons trouvé des semis dans 67 peuplements, appartenant à 19 espèces distinctes. Huit espèces présentes sous forme de semis plus âgés, manquent sous forme de semis de l'année, suggérant une variabilité temporelle du recrutement des espèces. L'abondance des semis des espèces à dispersion limitée est corrélée à celle des adultes. L'abondance des semis des espèces post-pionnières nomades, capable de s'installer en pleine lumière, est négativement corrélée à la distance à la lisière, tandis que celle des semis des espèces post-pionnières, plus sciaphiles présente le patron opposé.• Nos résultats indiquent que plusieurs espèces de plantes ligneuses sont capables de s'établir fréquemment sous canopée fermée dans ces taillis fragmentés, formant ainsi une banque de semis potentiellement utilisable pour la régénération naturelle de ces forêts. banque de semis de plantes ligneuses / Quercus spp. / lisière forestière / Sud-Ouest de la France / taillis

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Section: Spatial Pattern According To the Distance From The Forest Edgementioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Diversity of woody plant seedling banks under closed canopy in fragmented coppice forests

et al. 2008

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“…However higher frequency of severe drought may increase plant mortality, which may occur in rapid pulses rather than gradual declines (GITLIN et al 2006). Hence high plant mortality may inhibit the ability of local populations to recover and expand into more hospitable environments (HEWITT and KELLMAN 2004).…”

Section: Survival Pathways Within Populationsmentioning

confidence: 99%

Is drought altering plant populations in the mountainous region of Northeastern Mexico?

García

Jurado²

2015

Acta Botanica Croatica

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-Mortality in six plant species was examined in the vegetation of a mountain region in Northeastern Mexico and hypotheses of survival pathways within populations in the ecosystem were tested. Signifi cant differences in the general mortality pattern were found among species indicating species-specifi c responses to stress gradients. Average mortality differed among species: Yucca carnerosana, 33.8%; Pinus cembroides, 29.9%; Larrea tridentata, 25.9%; Hechtia podantha, 13.7%; Agave lechuguilla, 13.0%; and Thelocactus santaclarensis, 9.0%. Within populations, mortality increased with water stress and survivorship increased with less stressful environments. Results from this study may be useful for the development of a management plan to support the conservation and sustainable use of forest vegetation in this mountain community.

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“…As Aubin et al (2011) point out, however, the establishment of a translocated tree species would imply that it had been successfully naturalized, not that it was invasive. Furthermore, the inertia of intact forests against non-endemic tree species establishing themselves appears to be quite high (Hewitt and Kellman 1998). This may be one reason why Winder et al (2011) found few examples of native North American species becoming invasive.…”

Section: Negatives and Positives Of Assisted Migrationmentioning

confidence: 99%

Assisted migration: uncertainty, risk and opportunity

Park

Talbot

2012

The Forestry Chronicle

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The recent Forestry Chronicle special section on the subject of Assisted Migration (AM) did a great service to the Canadian forestry community by summarizing the risks, opportunities and ecological aspects of this forest management strategy. In this paper, we expand on some aspects of AM that were discussed in the special section, as well as discussing additional dimensions of AM that should be considered and debated. We expand on the theme of scientific uncertainties around future warming, emphasizing the full extent of uncertainty in estimates of climate sensitivity. We also expand upon and summarize a number of recent ecophysiological results that have implications for the adaptation and acclimation of trees to climate change. We also discuss opportunities for innovative forest management, the influence of economic trends on the future of the Canadian forest industry, and limitations on public knowledge of climate change, all of which are factors that will influence the feasibility of AM schemes in the future.Key words: assisted migration, managed relocation, climate change scenarios, uncertainty, ecophysiology, epigenetics RÉSUMÉLa section spéciale publiée dernièrement dans le Forestry Chronicle portant sur le sujet de la migration assistée (MA) a rendu un fier service à la communauté forestière canadienne en résumant les risques, les opportunités et les questions écologiques liés à cette stratégie d'aménagement forestier. Nous approfondissons dans cet article certains aspects de la MA qui ont été abordés dans la section spéciale et nous discutons également des dimensions additionnelles de la MA qui devraient être considérées et débattues. Nous nous attardons sur le thème portant sur les incertitudes scientifiques entourant le réchauffement climatique, mettant en évidence la portée complète de l'incertitude touchant les estimés de la sensitivité climatique. Nous résumons et nous discutons également de certains résultats écophysiologiques récents qui ont des répercussions sur l'adaptation et l'acclimatation des arbres face aux changements climatiques. Nous discutons aussi des opportunités d'innovation en matière d'aménagement forestier, de l'influence des tendances économiques sur l'avenir de l'industrie forestière canadienne et des limites des connaissances du public sur les changements climatiques, tous constituant des facteurs qui influenceront la faisabilité des schémas de MA dans le futur.

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Factors influencing tree colonization in fragmented forests: an experimental study of introduced seeds and seedlings

Cited by 32 publications

References 54 publications

Diversity of woody plant seedling banks under closed canopy in fragmented coppice forests

Diversity of woody plant seedling banks under closed canopy in fragmented coppice forests

Is drought altering plant populations in the mountainous region of Northeastern Mexico?

Assisted migration: uncertainty, risk and opportunity

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