Microdistribution des espèces végétales sur des affleurements rocheux de dolomie, dans une érablière du sud du Québec

1987 ◽  
Vol 65 (1) ◽  
pp. 1-11 ◽  
Author(s):  
André Cloutier
Keyword(s):  
Forest Floor ◽  
Woody Plants ◽  
Acer Saccharum ◽  
Primary Succession ◽  
Multivariate Analyses ◽  
Soil Depth ◽  
Tree Seedlings ◽  
Low Diversity ◽  
Small Cracks ◽  
Herbaceous And Woody Plants

The vegetation of dolomitic outcrops was sampled in a maple forest of southern Quebec. Multivariate analyses have demonstrated the influence of rockiness and size of outcrop on the distribution of herbaceous and woody plants. These results allow the description of five microcommunities. The flora of small cracks and hollows is exclusively herbaceous and of low diversity. Deeper soils support tree seedlings and saplings (mostly Acer saccharum) and also a diversified herbaceous stratum. The chemistry and mictotopography of outcrops produce mesic soils, rich in organic matter and nutrients. Soil depth segregates among plant species according to the size of their roots. Big outcrops have a more favorable microclimate. Dolomitic outcrops found in maple forests are biogeochemically rich microhabitats, which may support a more varied and abundant vegetation than does the surrounding forest floor. Primary succession on these outcrops is briefly discussed.

Microdistribution des espèces végétales au pied des troncs d'Acer saccharum dans une érablière du sud du Québec

1985 ◽  
Vol 63 (2) ◽  
pp. 274-276 ◽  
Author(s):  
André Cloutier
Keyword(s):  
Forest Floor ◽  
Acer Saccharum ◽  
Ecological Niche ◽  
Sugar Maple ◽  
Soil Depth ◽  
Herbaceous Plants ◽  
Forest Floor Vegetation ◽  
Nonrandom Pattern

This paper confirms the hypothesis that in a sugar maple – hickory forest, the forest floor vegetation growing near the base of Acer saccharum trunks is distributed following a nonrandom pattern. Bryophytes and herbaceous plants grow mostly near the trunk. In the same microhabitat, woody seedlings, dominated by Acer saccharum, seem unable to get established. This pattern is thought to be correlated with soil depth and the presence of stemflow. It is suggested that, in the community studied, the base of Acer saccharum trees constitutes an ecological niche essentially different from the rest of the forest floor.

Carbon dioxide transfer resistance as a factor in shade tolerance of tree seedlings

1970 ◽  
Vol 48 (3) ◽  
pp. 453-456 ◽  
Author(s):  
J. E. Wuenscher ◽  
T. T. Kozlowski
Keyword(s):  
Carbon Dioxide ◽  
Acer Saccharum ◽  
Net Photosynthesis ◽  
Tree Seedlings ◽  
Transfer Resistance ◽  
Quercus Velutina ◽  
Light Intensities ◽  
Quercus Species ◽  
Highly Correlated ◽  
Resistance Rates

Net photosynthesis and transpiration rates of single leaves of Quercus velutina Lam., Q. macrocarpa Michx. var. olivaeformis, and Acer saccharum Marsh. were measured at light intensities of 0.03 to 0.24 cal cm−2 min−1 (400–700 mμ). Resistance to water vapor and carbon dioxide transfer were calculated. Net photosynthesis of the Quercus species was not light saturated until light intensity was increased sufficiently to induce complete stomatal opening, indicating possible limitation of CO2 uptake at low light intensities by high CO2 transfer resistance. Rates of light-saturated net photosynthesis of all three species were highly correlated with CO2 transfer resistance.

scholarly journals Mosses Like It Rough—Growth Form Specific Responses of Mosses, Herbaceous and Woody Plants to Micro-Relief Heterogeneity

Diversity ◽  
2012 ◽  
Vol 4 (1) ◽  
pp. 59-73 ◽  
Author(s):  
Benjamin F. Leutner ◽  
Manuel J. Steinbauer ◽  
Carina M. Müller ◽  
Andrea J. Früh ◽  
Severin Irl ◽  
...  
Keyword(s):  
Woody Plants ◽  
Growth Form ◽  
Herbaceous And Woody Plants

scholarly journals Profiles of C- and N-trace gas production in N-saturated forest soils

2005 ◽  
Vol 2 (4) ◽  
pp. 1127-1157 ◽  
Author(s):  
K. Butterbach-Bahl ◽  
U. Berger ◽  
N. Brüggemann ◽  
J. Duyzer
Keyword(s):  
Forest Soils ◽  
Forest Floor ◽  
Soil Depth ◽  
Douglas Fir ◽  
Anaerobic Incubation ◽  
N2o Production ◽  
Time Activity ◽  
Soil Layers ◽  
Clear Cut ◽  
First Time

Abstract. This study provides for the first time data on the stratification of NO and N2O production with soil depth under aerobic and anaerobic incubation conditions for different temperate forest sites in Germany (spruce, beech, clear-cut) and the Netherlands (Douglas fir). Results show that the NO and N2O production activity is highest in the forest floor and decreases exponentially with increasing soil depth. Under anaerobic incubation conditions NO and N2O production was in all soil layers up to 2-3 orders of magnitude higher then under aerobic incubation conditions. Furthermore, significant differences between sites could be demonstrated with respect to the magnitude or predominance of NO and N2O production. These were driven by stand properties (beech or spruce) or management (clear-cut versus control). With regard to CH4 the most striking result was the lack of CH4 uptake activity in soil samples taken from the Dutch Douglas fir site at Speulderbos, which is most likely a consequence of chronically high rates of atmospheric N deposition. In addition, we could also demonstrate that CH4 fluxes at the soil surface are obviously the result of simultaneously occurring uptake and production processes, since even under aerobic conditions a net production of CH4 in forest floor samples was found. The provided dataset will be very useful for the development and testing of process oriented models, since for the first time activity data stratified for several soil layers for N2O, NO, and CH4 production/oxidation activity for forest soils are provided.

scholarly journals Determination of trace elements in the plants of Mt. Bozdag, Izmir, Turkey

2010 ◽  
Vol 62 (3) ◽  
pp. 731-738 ◽  
Author(s):  
D. Yildiz ◽  
I. Kula ◽  
G. Ay ◽  
S. Baslar ◽  
Y. Dogan
Keyword(s):  
Trace Elements ◽  
Woody Plants ◽  
Statistical Significance ◽  
Absorption Spectrometry ◽  
Dry Weight ◽  
Current Level ◽  
The Mean ◽  
Herbaceous And Woody Plants ◽  
Made In

The aim of this study was to determine the current level of atmospheric heavy metal content on the Bozdag Mountain of the Aegean Region, Turkey. Twenty nine different plants were selected to study their potential as biomonitors of trace elements such as Ni, Zn, Fe, Pb, Mn and Cd (?g g-1, dry weight). The samples were collected from two different altitudes of Mt. Bozdag. The concentrations of trace elements were determined by atomic absorption spectrometry. The mean concentrations determined at 1000 m altitude ranged from 0.025 to 1.609, 0.232 to 0.731, 0.578 to 5.983, 0.287 to 0.565 and 0.176 to 2.659 (?g g-1, dry weight), for Ni, Zn, Fe, Pb and Mn, respectively. At the altitude of 1600 m, the values ranged from 0.023 to 0.939, 0.258 to 1.254, 0.839 to 5.176, 0.301 to 1.341 and 0.405 to 3.351 (?g g-1, dry weight) for Ni, Zn, Fe, Pb and Mn, respectively. No Cd was detected at either altitude. Statistical significance was determined by the independent sample t-test and comparisons were made in order to determine if there were any differences between the averages of herbaceous and woody plants. .

scholarly journals Cellular and Genetic Regulation of Coniferaldehyde Incorporation in Lignin of Herbaceous and Woody Plants by Quantitative Wiesner Staining

2020 ◽  
Vol 11 ◽  
Author(s):  
Leonard Blaschek ◽  
Antoine Champagne ◽  
Charilaos Dimotakis ◽  
Nuoendagula ◽  
Raphaël Decou ◽  
...  
Keyword(s):  
Woody Plants ◽  
Genetic Regulation ◽  
Herbaceous And Woody Plants

Living long by staying small: stem layering as an adaptive life-history trait in shade-tolerant tree seedlings

2008 ◽  
Vol 38 (3) ◽  
pp. 480-487 ◽  
Author(s):  
Kerry D. Woods
Keyword(s):  
Population Dynamics ◽  
Acer Saccharum ◽  
Life Histories ◽  
Adventitious Roots ◽  
Shade Tolerance ◽  
Stem Growth ◽  
Life History Trait ◽  
Tree Seedlings ◽  
Canopy Trees ◽  
Successional Forests

Suppressed seedling banks are important in replacement dynamics in late-successional forests. However, demographic properties of seedling populations are poorly known, and there has been little attention to traits that might affect fitness in suppressed seedlings. Acer saccharum Marsh., a shade-tolerant dominant in eastern North American forests, frequently develops adventitious roots along prostrate portions of stems (“layering”). Measurements of Acer seedlings in old-growth forests in Michigan indicate that layered seedlings proportionally reduce structural allocations to older layered stem tissues, retain leaf area / height ratios of younger unlayered seedlings, and tend to survive longer. In tree seedlings, allometric consequences of normal stem growth lead to declining ratios of photosynthetic to nonphotosynthetic biomass, which potentially reduces shade tolerance and limiting age. The layering habit may defer this penalty by changing the allometry of growth. Resulting increases in life expectancy should increase chance of access to increased light and of reaching the canopy. Thus, because flowering is generally restricted to canopy trees, the tendency to layer may increase fitness. Properties of individuals in suppressed seedling banks may be selectively and ecologically important, shaping life histories and population dynamics.

scholarly journals Floristic and geobotanic features of the renaturalization process of Ust’-Sokskiy quarry

2016 ◽  
Vol 5 (4) ◽  
pp. 54-60
Author(s):  
Nataliya Vladimirovna Prokhorova ◽  
Yulia Vladimirovna Makarova ◽  
Aleksei Alekseevich Golovlyov ◽  
Maria Vyacheslavovna Samykina ◽  
Anzhelika Mikhailovna Pankevich
Keyword(s):  
Species Composition ◽  
Woody Plants ◽  
Vascular Plants ◽  
Abiotic Conditions ◽  
Middle Volga ◽  
Testing Field ◽  
Herbaceous And Woody Plants

Studies devoted to artificial reclamation and natural renaturalization of the open cuts are important because of the distribution of the nonmetallic open-cut mining in the Middle Volga. The following article contains the results of floristic and geobotanical study of the Ust-Sokskiy quarry, where the secondary plantation has been forming for the last 40 years after calciferous stock mining and quarrying. At present overgrowing Ust-Sokskiy quarry is used as a natural testing field for exploration of the secondary anthropogenic successions, ecological, anatomical, morphological, physiological, biochemical and biogeochemical peculiarities of plants. 107 species of the vascular plants belonging to 83 genera, 35 families, 5 classes and 4 phyla were fixed in the quarry. 6 species from the Red Book of Samara Region were found in the composition of the local flora. Species penetration to the quarry is realized by dissemination from the nearest natural phytocenoses of Sokolii Mountains. Local flora of the quarry is significantly poorer than that of the Sokolii Mountains and differed by species composition that is explained by abiotic conditions specifics which are inherent to the technologically disturbed territory. Herbaceous and woody plants of the quarry are characterized by depressed vital condition. Modern local flora of the quarry is unbalanced and the process of its forming is continued.

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