Abundance, distribution, and diversity of buried seed populations in the Delta Marsh, Manitoba, Canada / Roger L. Pederson

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Pederson, Roger L

Material type: Text

TextSeries: Thesis. (Ph.D.)Publication details: Ames, IA : Iowa State University, 1983.Abstract: Germinable seed densities from surface (0 to 5 cm) soil samples, soil cores (0 to 8 cm), and annual seed rain (seed traps) were measured in relation to elevation, soil salinity, and vegetation type (open water sites, Scirpus acutus, Typha glauca, Scolochloa festucacea, Carex atherodes, Phragmites communis, upland sites) in ten experimental marshes in the Delta Marsh, Manitoba. Numbers of germinable seeds were determined by observing seedling emergence in seed bank and seed trap soil samples placed under two simulated environmental conditions (drawdown and shallow-flooded) in outdoor greenhouses. The drawdown treatment yielded four times as many seedlings and twice as many species (34) as the shallow-flooded treatment. The most abundant species in the drawdown treatment were Scirpus validus, Typha spp., Chenopodium rubrum,and Ranunculus sceleratus. The most abundant species in the shallow-flooded treatment were Scirpus validus, Zannichellia palustris,Typha ssp., and Scirpus maritimus

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Theses	Research Library Theses	Non-fiction	PED (Browse shelf(Opens below))	Available		1559

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Germinable seed densities from surface (0 to 5 cm) soil samples, soil cores (0 to 8 cm), and annual seed rain (seed traps) were measured in relation to elevation, soil salinity, and vegetation type (open water sites, Scirpus acutus, Typha glauca, Scolochloa festucacea, Carex atherodes, Phragmites communis, upland sites) in ten experimental marshes in the Delta Marsh, Manitoba. Numbers of germinable seeds were determined by observing seedling emergence in seed bank and seed trap soil samples placed under two simulated environmental conditions (drawdown and shallow-flooded) in outdoor greenhouses. The drawdown treatment yielded four times as many seedlings and twice as many species (34) as the shallow-flooded treatment. The most abundant species in the drawdown treatment were Scirpus validus, Typha spp., Chenopodium rubrum,and Ranunculus sceleratus. The most abundant species in the shallow-flooded treatment were Scirpus validus, Zannichellia palustris,Typha ssp., and Scirpus maritimus

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