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9 resultater
Oxygen Deficiency in Spartina alterniflora Roots: Metabolic Adaptation to Anoxia.
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The aerenchyma (air-space) tissue in the wetland macrophyte Spartina alterniflora conveys sufficient oxygen to roots for predominately aerobic respiration in moderately, but not highly, reduced substrates. Continuously flooded plants survive by respiring anaerobically, although growth is decreased.
Lacunal allocation and gas transport capacity in the salt marsh grass Spartina alterniflora.
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Lacunal allocation as the fraction of the total cross sectional area of leaves, stem bases, rhizomes, and roots was determined in both tall and short growth forms of Spartina alterniflora collected from natural monospecific stands. The results indicate that in both growth forms lacunal allocation is
Fiddler crabs facilitate Spartina alterniflora growth, mitigating periwinkle overgrazing of marsh habitat.
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Ecologists have long been interested in identifying and testing factors that drive top-down or bottom-up regulation of communities. Most studies have focused on factors that directly exert top-down (e.g., grazing) or bottom-up (e.g., nutrient availability) control on primary production. For example,
How will warming affect the salt marsh foundation species Spartina patens and its ecological role?
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Foundation species structure environments and create refuge from environmental stress. In New England high salt marsh, the grass Spartina patens is a foundation species that reduces salinity, anoxia, desiccation, and thermal stresses through canopy shading and root proliferation. In a factorial S.
Mechanisms generating modification of benthos following tidal flat invasion by a Spartina hybrid.
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Many coastal habitats are being substantially altered by introduced plants. In San Francisco Bay, California, USA, a hybrid form of the eastern cordgrass Spartina alterniflora is rapidly invading open mudflats in southern and central sections of the Bay, altering habitat, reducing macrofaunal
Abiotic stress mediates top-down and bottom-up control in a Southwestern Atlantic salt marsh.
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Increasing evidence has shown that nutrients and consumers interact to control primary productivity in natural systems, but how abiotic stress affects this interaction is unclear. Moreover, while herbivores can strongly impact zonation patterns in a variety of systems, there are few examples of this
[Effects of bio-mineral food additive on health].
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Spartina alterniflora, one kind of bio-mineral food additive and special nutrient liquid, rich in bioactive materials, was extracted from a marsh plant grown in beach. It can enhance immune function of animals and human bodies, increase the tolerance to hypoxia in rats, prolong life span of fruit
Sudden Vegetation Dieback in Atlantic and Gulf Coast Salt Marshes.
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Salt marshes rank as the most productive ecosystems on the planet. Biomass production can be greater than 3 kg dry matter/m2/year, which is 40% more biomass than tropical rainforests produce. Salt marshes provide multiple benefits to mankind. For example, coastal communities receive
Effects of Inundation, Nutrient Availability and Plant Species Diversity on Fine Root Mass and Morphology Across a Saltmarsh Flooding Gradient.
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Saltmarsh plants are exposed to multiple stresses including tidal inundation, salinity, wave action and sediment anoxia, which require specific root system adaptations to secure sufficient resource capture and firm anchorage in a temporary toxic environment. It is well known that many saltmarsh
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