Competition for water between beech seedlings and surrounding vegetation in different light and vegetation composition conditions

Coll, Lluís; Balandier, Philippe; Picon‐Cochard, Catherine; Prévosto, Bernard; Curt, Thomas

doi:10.1051/forest:2003051

Cited by 87 publications

(83 citation statements)

References 27 publications

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“…High plasticity of leaf traits has been proved to coincide with high relative growth rates (RGR) [42]. Morphological plasticity in belowground parts has received much less attention although overstory species and grasses can outcompete beech [8,10]. However, studies are frequently unable to discriminate ontogenic effects of beech age from biotic (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Plasticity in growth, biomass allocation and root morphology in beech seedlings as induced by irradiance and herbaceous competition

Curt

Coll²,

Prévosto³

et al. 2005

Ann. For. Sci.

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-Biomass increment, biomass allocation and fine-root morphology were compared on four-year old Fagus sylvatica seedlings growing under low (11% relative irradiance), medium (14-19%) or high (46%) irradiance under natural Pinus sylvestris canopies, and under full light in a weeded meadow in the French Massif Central. Significant differences in biomass increment were found among plots in relation to light regime and interspecific competition. Light regime had little effect on shoot-to-root ratio and biomass allocation, but had a clear impact on above-and belowground morphological variables. Beech seedlings displayed a lower specific root length (SRL) and a higher specific leaf area (SLA) under shade, thus indicating morphological adjustment to shade. Similarly, competition from herbaceous vegetation had a negligible effect on seedling growth and biomass allocation, but significant impact on fine-root morphology. Low SLA and high SRL values at high irradiance coincided with high growth increments. biomass allocation / European beech (Fagus sylvatica L.) / fine-root architecture / interspecific competition / irradianceRésumé -Plasticité de la croissance de l'allocation de biomasse et de la morphologie racinaire chez les semis de hêtre provoquée par l'éclairement et la compétition herbacée. L'accroissement de biomasse, les patrons d'allocation de biomasse et la morphologie des racines fines ont été comparés sur des plants de hêtre (Fagus sylvatica L.) de quatre ans installés sous un boisement naturel de pin sylvestre à faible, moyen et fort éclairement (11 %, 14-19 % et 46 % d'irradiance relative), et en pleine lumière dans une prairie désherbée du Massif Central français. Les plants ont montré des différences significatives d'accroissement en biomasse selon l'éclairement relatif et l'intensité de la compétition avec le pin et les herbacées. L'éclairement a peu affecté le ratio biomasse aérienne / biomasse racinaire et l'allocation de biomasse au sein des différents compartiments, mais a eu un impact clair sur la morphologie foliaire et racinaire des plants. Les hêtres subissant un fort ombrage présentaient des racines fines peu ramifiées (faible longueur spécifique racinaire, SRL) et des feuilles peu épaisses (forte surface spécifique foliaire, SLA), ce qui suggère une faible capacité d'accès aux ressources du sol et un ajustement à une faible énergie lumineuse. De même, la végétation herbacée a eu un faible impact sur la croissance des hêtres et l'allocation de biomasse, mais a affecté significativement la morphologie de leur racines fines. Au total, des valeurs de SLA faibles et de SRL fortes à fort éclairement correspondent à de forts taux d'accroissement en biomasse. allocation de biomasse / hêtre (Fagus sylvatica L.) / morphologie des racines fines / compétition interspécifique / éclairement sous forêt

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Section: Introductionmentioning

confidence: 99%

“…I) and it is unlikely that they would have a strong impact on beech growth [2]. Soil-water content was monitored weekly in the 0-20 cm soil layer with a TDR probe (Trime T3, IMKO, Ettlingen, Germany) beside four beech seedlings per plot (see [8,9]). …”

mentioning

confidence: 99%

Plasticity in growth, biomass allocation and root morphology in beech seedlings as induced by irradiance and herbaceous competition

Curt

Coll²,

Prévosto³

et al. 2005

Ann. For. Sci.

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“…Light availability under forest canopies is a key factor for understanding biological and ecological processes such as forest regeneration [46,54], vegetation dynamics [15,55,65], soil biological activity [61] and many others [28,35,38]. In order to characterise light regimes and make comparisons between different stands and climatic conditions, many studies use Relative Light Intensity (RLI), which is also known as the Percentage of Above Canopy Light (PACL), in a forest context.…”

Section: Introductionmentioning

confidence: 99%

Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations

et al. 2005

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-Light models provide an interesting way to analyse the influence of the forest canopy on understory biological processes but need a detailed description of tree crowns, requiring many field measurements. This study proposes supplying light models with only stem diameter and tree position and reconstructing crowns using diameter-related allometric relations. First, the diameter-related relations for total height, crown base height and mean crown radius were established for each species. Second, two reconstruction methods were compared: a simple isotropic method and a more sophisticated method, the Crown Reconstruction by Overlap Minimisation method. The latter method gave better results than the simpler one, even if some small bias was not completely resolved in the darkest areas. However, using crown centre position instead of stem position resolved this bias. crown reconstruction / crown competition / light model / heterogeneous forest / broadleavesRésumé -Reconstruction de la forme des houppiers à partir du diamètre des arbres et de leur position pour alimenter un modèle de lumière. I. Algorithmes et comparaison des simulations de l'éclairement. Les modèles de lumière constituent un bon moyen pour analyser l'influence du couvert forestier sur les processus biologiques sous-couvert. Malheureusement ils nécessitent une description détaillée des houppiers des arbres, ce qui implique des mesures de terrain assez lourdes. Cet article propose d'alimenter les modèles de lumière uniquement avec le diamètre et la position des arbres, et de reconstituer les houppiers en utilisant des relations allométriques en fonction du diamètre à 1,30 m. Les relations allométriques sont tout d'abord établies pour la hauteur totale, la hauteur de base de houppier et le rayon moyen du houppier, pour chaque espèce. Ensuite deux méthodes de reconstruction des houppiers sont comparées : une méthode simple dite isotrope et une plus sophistiquée, la méthode de reconstruction des houppiers par minimisation des chevauchements. Cette dernière donne de meilleurs résultats, même si un léger biais subsiste dans les zones les plus sombres. Cependant le fait d'utiliser la position des centres de houppiers au lieu de celle des troncs permet de complètement supprimer ce biais. reconstruction des houppiers / compétition des houppiers / modèles de lumière / forêt hétérogène / feuillus

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“…Height of weeds were similar on ploughed berms and mounds (Suchockas et al, 2014). Grasses had been noted as most signifi cant competitors, capable to reduce height-growth of seedlings, primarily due to fast root growth and consequently intensive water uptake by graminoids (Coll et al, 2003). In order to reduce this impact, need for tending was similar in both disctrenched and spot-mounded sites.…”

Section: Tending In Relation To Soil Preparation Methodsmentioning

confidence: 99%

Influence of spot mounding on height growth and tending of Norway spruce: case study in Latvia

et al. 2016

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A., Jansons, J., Neimane, U., Jansons, Ā. 2016. Infl uence of spot mounding on height growth and tending of Norway spruce: case study in Latvia. -Forestry Studies | Metsanduslikud Uurimused 65, 24-33. ISSN 1406-9954. Journal homepage: http://mi.emu.ee/forestry.studies Abstract. Norway spruce is commonly regenerated by planting and disc trenching is by far the most widely used soil preparation method in Latvia; however, in specifi c site conditions other methods might be benefi cial. Therefore aim of our study was to assess infl uence of spot mounding on early growth and tending of Norway spruce in hemiboreal forests. Spot mounding was compared with disc trenching or no soil preparation in central part of Latvia (57° N 24° E) in fi ve different forest types, where two-year-old containerized Norway spruce seedlings were planted. Infl uence of soil preparation method on tending was assessed in the same region in two different sites in a single forest type on drained fertile mineral soil. Spot mounding had positive effect on the height increment of the dominant trees at the 6 th to 8 th growing season. Mean height of Norway spruce at the end of 8 th growing season on mounds signifi cantly exceeded that on unprepared soil: 179 ± 6.5 and 152 ± 6.2 cm, respectively. Similarly mean height on mounds was signifi cantly larger than on furrows: 209 ± 3.9 and 154 ± 4.0 cm, respectively. Projective vegetation cover before the tending was signifi cantly higher in spot-mounded, but after -in disc trenched sites. Networking time for brashsaw operators in spot-mounded (478 min/ha -1 ) and disc trenched (462 min/ha -1 ) sites was similar (p > 0.05). Overall, spot mounding ensured more suitable microenvironment resulting in higher productivity of planted trees and had no negative effect on quality or effi ciency of tending, therefore its wider use is recommended.

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Competition for water between beech seedlings and surrounding vegetation in different light and vegetation composition conditions

Cited by 87 publications

References 27 publications

Plasticity in growth, biomass allocation and root morphology in beech seedlings as induced by irradiance and herbaceous competition

Plasticity in growth, biomass allocation and root morphology in beech seedlings as induced by irradiance and herbaceous competition

Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations

Influence of spot mounding on height growth and tending of Norway spruce: case study in Latvia

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