Vertical variation in autumn leaf phenology of Fagus sylvatica L. in southern Germany

Gressler, Eliana; Jochner, Susanne; Capdevielle-Vargas, Renée Monserrat; Morellato, Leonor Patrícia Cerdeira; Menzel, Annette

doi:10.1016/j.agrformet.2014.10.013

Cited by 40 publications

(31 citation statements)

References 65 publications

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“…During our observational period, the local environmental conditions in terms of air temperature and relative humidity at the study site did not show any significant differences among three vertical transects (30 m high) with 6 levels each (data not shown, see Gressler et al (2015) for data on autumn 2012). Trees at the site showed a similar canopy cover (0.98 m 2 m −2 ± 0.012) and a similar diameter at breast height (62.96 cm ± 8.26).…”

Section: Discussionmentioning

confidence: 81%

Multiple-year assessment of phenological plasticity within a beech (Fagus sylvatica L.) stand in southern Germany

Capdevielle-Vargas

Estrella

Menzel

2015

Agricultural and Forest Meteorology

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Section: Discussionmentioning

confidence: 81%

Multiple-year assessment of phenological plasticity within a beech (Fagus sylvatica L.) stand in southern Germany

Capdevielle-Vargas

Estrella

Menzel

2015

Agricultural and Forest Meteorology

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“…The GLI during leaf expansion was only calculated for the fourteen plots that were measured weekly. Julian day 286, 12 October, was considered as the end of the growing season and this date coincides with the onset of leaf coloration in trees (Gressler, Jochner, Capdevielle-Vargas, Morellato, & Menzel, 2015).…”

Section: Quantifying Light Transmittancementioning

confidence: 99%

How tree species identity and diversity affect light transmittance to the understory in mature temperate forests

Sercu

Baeten

Coillie

et al. 2017

Ecology and Evolution

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Light is a key resource for plant growth and is of particular importance in forest ecosystems, because of the strong vertical structure leading to successive light interception from canopy to forest floor. Tree species differ in the quantity and heterogeneity of light they transmit. We expect decreases in both the quantity and spatial heterogeneity of light transmittance in mixed stands relative to monocultures, due to complementarity effects and niche filling. We tested the degree to which tree species identity and diversity affected, via differences in tree and shrub cover, the spatiotemporal variation in light availability before, during, and after leaf expansion. Plots with different combinations of three tree species with contrasting light transmittance were selected to obtain a diversity gradient from monocultures to three species mixtures. Light transmittance to the forest floor was measured with hemispherical photography. Increased tree diversity led to increased canopy packing and decreased spatial light heterogeneity at the forest floor in all of the time periods. During leaf expansion, light transmittance did differ between the different tree species and timing of leaf expansion might thus be an important source of variation in light regimes for understory plant species. Although light transmittance at the canopy level after leaf expansion was not measured directly, it most likely differed between tree species and decreased in mixtures due to canopy packing. A complementary shrub layer led, however, to similar light levels at the forest floor in all species combinations in our plots. Synthesis. We find that a complementary shrub layer exploits the higher light availability in particular tree species combinations. Resources at the forest floor are thus ultimately determined by the combined effect of the tree and shrub layer. Mixing species led to less heterogeneity in the amount of light, reducing abiotic niche variability.

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“…The moderating effect of subcanopy is also suggested by studies which measure the 406 vertical air humidity profile in various stands (Elias et al, 1989;Gressler et al, 2015).…”

mentioning

confidence: 99%

Stand structural drivers of microclimate in mature temperate mixed forests

Kovács

Tinya

Odór

2017

Agricultural and Forest Meteorology

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Vertical variation in autumn leaf phenology of Fagus sylvatica L. in southern Germany

Cited by 40 publications

References 65 publications

Multiple-year assessment of phenological plasticity within a beech (Fagus sylvatica L.) stand in southern Germany

Multiple-year assessment of phenological plasticity within a beech (Fagus sylvatica L.) stand in southern Germany

How tree species identity and diversity affect light transmittance to the understory in mature temperate forests

Stand structural drivers of microclimate in mature temperate mixed forests

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