Woody Plant Regeneration in Four Floodplain Forests

Jones, Robert H.; Sharitz, Rebecca R.; Dixon, Philip M.; Segal, Debra S.; Schneider, Rebecca L.

doi:10.2307/2937166

Cited by 192 publications

(137 citation statements)

References 45 publications

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“…In temperate fioodplain forests, seedling density and survival were greater in elevated microsites (Jones et al 1994). Similarly, seed deposition and germination of temperate bottomland and tropical swamp species was greater in elevated sites such as stumps, logs or mounded soils than in depressions (Schneider and Sharitz 1988;Imbert et al 2000).…”

Section: Drought Severity Differential Mortality and Changes In Forementioning

confidence: 86%

Interannual variation in rainfall, drought stress and seedling mortality may mediate monodominance in tropical flooded forests

López

Kursar

2007

Oecologia

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Flood tolerance is commonly regarded as the main factor explaining low diversity and monodominance in tropical swamps. In this study we examined seedling mortality in relation to seasonally, i.e., flooding versus drought, of the dominant tree species (Prioria copaifera), and three associated species (Pterocarpus ojficinalis, Carapa guianensis and Pentaclethra macroloba), in seasonally flooded forests (SFF) in Darien, Panama. Seedling mortality differed among species, years and seasons. Prioria seedlings experienced the lowest overall mortality, and after 3 years many more Prioria seedlings remained alive than those of any of the associated species. In general, within species, larger seedlings had greater survival. Seed size, which can vary by close to 2 orders of magnitude in Prioria, had a confounding effect with that of topography. Large-seeded Prioria seedlings experienced 1.5 times greater mortality than small-seeded seedlings, as large-seeded Prioria seedlings were more likely to be located in depressions. This finding suggests that seed size, plant size and topography are important in understanding SFF regeneration. For all species, seedling mortality was consistently greater during the dry season than during flooding. For Prioria, dry season seedling mortality was correlated with drought stress, that is, high mortality during the long El Nino dry season of 1998 and the normal dry season of 2000, but very low dry season mortality during the mild dry season of 1999. Prioria's ability to dominate in seasonally flooded forest of Central America is partly explained by its low drought-related mortality in comparison to associated species.

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Section: Drought Severity Differential Mortality and Changes In Forementioning

confidence: 86%

Interannual variation in rainfall, drought stress and seedling mortality may mediate monodominance in tropical flooded forests

López

Kursar

2007

Oecologia

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“…Resulting in marked heterogeneity in terms of irradiance beneath the lantana bush and affects species diversity beneath its canopy. Light availability on the forest floor has been recognized as a key factor that influences intrinsic traits of inhabiting species (Jones et al, 1994;Walters and Reich, 1996). The dense cover created by vertical stratification of lantana may reduce the intensity or duration of light under its canopy and thus decrease the herbaceous cover.…”

Section: Discussionmentioning

confidence: 99%

Lantana Camara L. Invasion and Impact on Herb Layer Diversity and Soil Properties in a Dry Deciduous Forest of India

Sharma¹

2011

Appl Ecol Env Res

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Abstract. Invasion of lantana (Lantana camara L.) in dry deciduous forest is capable of causing changes in micro sites (soil properties and species composition) in which they invade. As lantana is most conspicuous invader in the Vindhyan dry deciduous forests of India. We analyzed the effect of this invasive species on the composition of herbaceous layer and on soil properties. Habitats with different level of canopy cover were analyzed. And the canopy cover was significantly related to the lantana cover. Results indicate that different levels of lantana cover affect soil properties and herbaceous species composition. We found as the lantana cover increases some of the species get locally extinct and some are favored by lantana invasion. Principal Component Analysis (PCA) ordination indicated that the quadrates with nil and differently covered lantana were unique with herb species composition, especially the sites with no lantana cover had native species which were not present in site with differently covered lantana. The distinctness of herb species composition is indicative of marked spatial dynamics with regard to nil and differently covered lantana. Concentration of organic carbon (OC) and total nitrogen (TN) were significantly higher in habitats having large lantana cover. Thus we may conclude that lantana modifies the spatial pattern of herbaceous plant species and the nutrient levels of soil.

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“…While there is evidence of small-scale gap dynamics in the few old-growth remnants left [1,5,16], it is likely that flooding also played a role in these ecosystems. For example, in North America both flooding and windthrow have been noted as important disturbance agents in bottomland hardwood forests [4,15].…”

Section: Introductionmentioning

confidence: 99%

Response of Quercus robur L. seedlings to north-south asymmetry of light within gaps in floodplain forests of Slovenia

Diaci

Gyoerek²,

Janez³

et al. 2008

Ann. For. Sci.

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-To examine Quercus robur establishment and growth in low to intermediate light levels, we analysed regeneration in different microsites created by light asymmetry within gaps in two main floodplain forest regions of Slovenia: Dolinsko and Krakovo. Four years after a mast year in 1995, we installed systematic grids of 1×1 m plots in 11 gaps (0.03-0.40 ha) on wet and dry site variants. In 256 plots, seedling species, cover, density, height, height increment, browsing damage, tree architecture, understory vegetation species and cover, and direct and diffuse light were measured. The average seedling density in all gaps was 15/m 2 , but the highest densities were found in gap positions with low diffuse light levels (10-20%). Competing understory vegetation was more abundant in positions with high diffuse light. In gaps on dry site variants a combination of low diffuse and high direct light was favourable for regeneration. The results indicated that Q. robur can successfully establish in gaps. Here, both light components were sources of within gap resource heterogeneity, therefore knowledge of light asymmetry can improve regeneration success. Quercus robur / Carpinus betulus / natural regeneration / canopy gaps / north-south asymmetry of light in gapsRésumé -Réponse des semis de Quercus robur L. à l'asymétrie de lumière Nord-Sud dans les trouées des forêts inondables en Slovénie. Pour examiner l'installation et la croissance de Quercus robur, sous des niveaux d'éclairement faibles à moyens, nous avons analysé la régénération dans différents microsites affectés par l'asymétrie da la lumière dans des trouées en forêts inondables en Slovénie : Dolinsko et Krakovo. Quatre années après une forte glandée en 1995, nous avons installé des placettes d'observation suivant une grille de 1×1 m dans 11 trouées (0.03-0.40 ha) de stations sèches et humides. Les paramètres suivants ont été mesurés sur 256 emplacements : l'espèce des semis, l'abondance relative, la densité, la hauteur l'accroissement en hauteur, les dommages d'abroutissement, l'architecture des arbres, les espèces du sous-bois, l'éclairement direct et diffus. La densité moyenne des semis de toutes les trouées était de 15/m 2 , mais les plus fortes densités ont été trouvées dans les trouées aux expositions caractérisées par des faibles niveaux d'éclairement diffus (10-20%). La végétation compétitrice du sous-bois était plus abondante dans les situations à niveau élevé de lumière diffuse. Dans les variantes sèches des trouées, une combinaison de faible niveau de lumière diffuse et de fort éclairement direct était favorable à la régénération. Les résultats indiquent que Quercus robur peut s'installer avec succès dans les trouées. Ici, les deux composantes de l'éclairement ont été sources d'hétérogénéité dans les ressources des trouées, par conséquent la connaissance de l'asymétrie de l'éclairement peut améliorer le succès de la régénération.Quercus robur / Carpinus betulus / régénération naturelle / trouées dans la canopée / asymétrie de lumière Nord-Sud dans d...

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Woody Plant Regeneration in Four Floodplain Forests

Cited by 192 publications

References 45 publications

Interannual variation in rainfall, drought stress and seedling mortality may mediate monodominance in tropical flooded forests

Interannual variation in rainfall, drought stress and seedling mortality may mediate monodominance in tropical flooded forests

Lantana Camara L. Invasion and Impact on Herb Layer Diversity and Soil Properties in a Dry Deciduous Forest of India

Response of Quercus robur L. seedlings to north-south asymmetry of light within gaps in floodplain forests of Slovenia

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