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Temporal variation in stable isotope composition ( delta super(13)C, delta super(15)N and delta super(34)S) of a temperate Zostera marina food web
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Temporal variation in stable isotope composition ( delta super(13)C, delta super(15)N and delta super(34)S) of a temperate Zostera marina food web
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Temporal variation in stable isotope composition ( delta super(13)C, delta super(15)N and delta super(34)S) of a temperate Zostera marina food web
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Journal Article
Temporal variation in stable isotope composition ( delta super(13)C, delta super(15)N and delta super(34)S) of a temperate Zostera marina food web
2014
Overview
Simultaneous triple stable isotope analysis of carbon, nitrogen and sulphur was employed to study the temporal variation in the food web of a subtidal eelgrass Zostera marina bed in the western Baltic Sea. Samples of 3 potential food sources (eelgrass, epiphytes and seston) and consumer species were collected biweekly from March through September 2011. Temporal variation of stable isotope compositions was observed in primary producers and consumer species. However, variation between replicates, particularly omnivores, often exceeded variation over time. The high degree of omnivory among the generalist feeders in this eelgrass community allows for generalist feeders to flexibly switch food sources, thus enhancing food-web stability. As coastal systems are subject to seasonal changes, as well as alterations related to human disturbance and climate, these food webs may retain a certain resilience due to their plentiful omnivores.
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