Notes sur la vegetation du sud-ouest de la France: V: Les peuplements de Scirpus americanus Pers. dans le departement des Landes

1967 ◽  
Vol 37 (3) ◽  
pp. 335 ◽  
Author(s):  
C. Vanden Berghen
Keyword(s):  
Scirpus Americanus

The role of waterlogging and sand accretion in modulating the morphology of the dune slack plant Scirpus americanus

1990 ◽  
Vol 68 (8) ◽  
pp. 1780-1787 ◽  
Author(s):  
Denise M. Seliskar
Keyword(s):  
Sand Dune ◽  
Plant Morphology ◽  
Common Garden ◽  
Stem Growth ◽  
Reciprocal Transplant ◽  
Dune Slack ◽  
Coastal Sand Dune ◽  
Scirpus Americanus ◽  
Common Garden Experiments

Scirpus americanus Pers., a major dune slack plant in coastal sand dune ecosystems, differs in height along transects ranging between the lowest and highest elevational areas of slacks located along the coast of Delaware, U.S.A. Using reciprocal transplant and common garden experiments, results suggest that environmental factors rather than hereditary traits are more important in accounting for the differences in plant morphology expressed in the field. Dune slack plants are exposed to stresses of waterlogging and sand accretion in their natural environment. In controlled greenhouse experiments waterlogging was shown to inhibit stem growth and cause an increase in aerenchymatous tissue, whereas periodic sand deposition caused an increase in the plant height of Scirpus.

Effects of simulated feeding by snow geese on Scirpus americanus rhizomes

Oecologia ◽  
1987 ◽  
Vol 74 (1) ◽  
pp. 137-143 ◽  
Author(s):  
J. -F. Giroux ◽  
J. B�dard
Keyword(s):  
Scirpus Americanus ◽  
Snow Geese ◽  
Simulated Feeding

The influence of salinity on Scirpus americanus tidal marshes in the St. Lawrence River estuary, Québec

1985 ◽  
Vol 63 (5) ◽  
pp. 920-927 ◽  
Author(s):  
J. Deschênes ◽  
J.-B. Sérodes
Keyword(s):  
Fresh Water ◽  
Lower Limit ◽  
Brackish Water ◽  
Saline Water ◽  
River Estuary ◽  
Considerable Effect ◽  
Tidal Marshes ◽  
Brackish Waters ◽  
Scirpus Americanus ◽  
St Lawrence River

The amount of sodium in the aboveground part of the stalks of Scirpus americanus taken at the peak of biomass is a good indicator of the amount of salinity in the waters flooding the tidal marshes of an estuary. In fresh water, the Na concentrations remain below 10 000 and then increase sharply up to 20 000 – 30 000 mg/kg in brackish waters. Even though this plant can grow under brackish conditions, salinity has a considerable effect on the percentage of submersion it can withstand. Consequently, in the presence of saline water, the lower limit of the vegetation regresses towards the shore. In the case of fresh water, Scirpus americanus occupies the lower part of marshes up to an average of 75% of submersion, while in brackish water it extends to about 35% and then disappears when waters are more saline.

The essential oil in Scirpus americanus

1974 ◽  
Vol 13 (9) ◽  
pp. 2027-2029 ◽  
Author(s):  
Naresh V. Mody ◽  
Edward J. Parish ◽  
J. Bhattacharyya ◽  
D.Howard Miles ◽  
Paul A. Hedin
Keyword(s):  
Essential Oil ◽  
Scirpus Americanus

Effects of goose grazing on the quality of Scirpus americanus rhizomes

1990 ◽  
Vol 68 (5) ◽  
pp. 1012-1014 ◽  
Author(s):  
L. Bélanger ◽  
J.-F. Giroux ◽  
J. Bédard
Keyword(s):  
Standing Crop ◽  
Nutritional Value ◽  
Structural Characteristics ◽  
Chen Caerulescens ◽  
Scirpus Americanus ◽  
Snow Geese ◽  
Chen Caerulescens Atlantica ◽  
Nutritional Constituents ◽  
St Lawrence River

We investigated whether repeated intensive grazing of rhizomes of three-square bulrush (Scirpus americanus) by greater snow geese (Chen caerulescens atlantica) staging in a tidal brackish marsh along the St. Lawrence River in Québec can induce changes in the nutritional value and structural characteristics of the rhizomes. We compared rhizomes growing on heavily used sites with those growing in ungrazed sites (exclosures) for 3 years. The belowground standing crop of S. americanus was greater in ungrazed than in grazed plots, but no difference was observed in the nutritional constituents (nitrogen and fiber) of rhizomes between the two types of plot. Moreover, S. americanus did not increase the deposition of phenolics (chemical defense) in its rhizomes following grazing. Our results lead us to conclude that goose grubbing decreases quantity without affecting quality of S. americanus rhizomes.

scholarly journals Induction of in vitro roots cultures of Thypha latifolia and Scirpus americanus and study of their capacity to remove heavy metals

2007 ◽  
Vol 10 (3) ◽  
pp. 0-0 ◽  
Author(s):  
Maria del Socorro Santos-Diaz ◽  
Maria del Carmen Barron-Cruz ◽  
Maria Catalina Alfaro-De la Torre
Keyword(s):  
Heavy Metals ◽  
Scirpus Americanus ◽  
In Vitro Roots

scholarly journals Nature lithologique et origine des cailloux de l’anse Hamilton, Saint-Romuald, Québec

2007 ◽  
Vol 45 (2) ◽  
pp. 229-240 ◽  
Author(s):  
Jean-Claude Dionne
Keyword(s):  
Scirpus Americanus

RÉSUMÉ Le substrat meuble de l'anse Hamilton à Saint-Romuald, sur la rive sud du Saint-Laurent dans la région de Québec, est composé d'un dépôt sableux et caillouteux du type diamicton, comprenant des éléments grossiers de taille et de nature lithologique variées ainsi que de formes et de degrés d'émoussé divers. La zone intertidale d'environ 300 m de largeur comprend un marais (schorre) à scirpe (Scirpus americanus) dans la moitié supérieure et un estran dénudé dans la moitié inférieure. La nature lithologique des cailloux a été déterminée à la fois sur les blocs à la surface de l'estran, sur les petits cailloux (3-8 cm) du diamicton et sur les galets d'une petite plage sise au pied de la micro-falaise du schorre. Sur un total de 2725 blocs examinés, on a trouvé 49,9 % de précambriens, 47,6 % de grès et 1,3 % de calcaires. Les 2976 cailloux du diamicton sableux comptés ont donné les proportions moyennes suivantes: 16,9 % de précambriens, 36,1 % de grès, 25,5 % de calcaires, 12,4 % de schistes, 7,7 % de quartz et 1,3 % de quart-zites. Sur un total de 1201 galets d'une petite plage, on a obtenu: 25,8 % de précambriens, 26 % de grès, 37,4 % de calcaires,7,5 % de schistes et 2,4 % de quartz. Les cailloux de l'estran sableux de Saint-Romuald proviennent à la fois des trois grandes unités géologiques entourant Québec, soit le Bouclier laurentidien à une vingtaine de kilomètres au nord, les basses terres du Saint-Laurent à une trentaine de kilomètres au sud-ouest et les formations appalachiennes sises à proximité de l'anse Hamilton. L'essentiel du matériel grossier a été apporté dans ce site par les glaces flottantes, au cours de l'Holocène, surtout pendant le dernier millénaire. Il s'agit donc d'un diamicton glaciel récent et non d'un till remanié.

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