. Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . FIGURE 1. Marsh west of the bridge at lie Grande. Area without vegetation is due to removal of oil and vegetation during Amoco Cadiz cleanup operations. material which was sandy loam in texture and low in nitrogen and phosphorus. Marsh vegetation adjacent to the disturbed sites indicated that prior to the oil spill the natural marsh was composed primarily of Juncus maritimus, Puccinellia maritima, Triglochin maritima, Limonium yulgare, with lesser amounts of Spartina maritima. Halimione por
. Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . FIGURE 1. Marsh west of the bridge at lie Grande. Area without vegetation is due to removal of oil and vegetation during Amoco Cadiz cleanup operations. material which was sandy loam in texture and low in nitrogen and phosphorus. Marsh vegetation adjacent to the disturbed sites indicated that prior to the oil spill the natural marsh was composed primarily of Juncus maritimus, Puccinellia maritima, Triglochin maritima, Limonium yulgare, with lesser amounts of Spartina maritima. Halimione portulacoides was dominant along the creek banks. We noted considerable variation in the relative dominance of these species and others within marshes in the vicinity. Spartina anglica C E. Hubbard was present only at a single site at lie Grande as a small clump less than 3 m in diameter. This species is abundant in the Bay of Mt. St. Michel some 125 km to the east of lie Grande. Juncus stands generally occupied the highest elevations of the marsh relative to the other species mentioned. Subsequent observations indicated that the Juncus marsh is flooded for about 3 days each spring tide cycle. Above the level of Juncus there was in some areas a narrow fringe of Festuca rubra and Agropyron pungens with associated species. Many salt marsh ecologists consider this vegetation to be a part of the marsh. This higher zone of vegetation which extends up to ca. 1m above the Juncus marsh is flooded relatively infrequently on extremely high storm tides and spring tides. It lies above the marsh impacted by Amoco Cadiz oil and cleanup operations. Our marsh rehabilitation efforts were confined to elevations from m below to m above that of the Juncus marsh. 365
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