What does this research mean for the field?

Wide intertidal zones amplify nutrient subsidies to shoreline invertebrates, with each additional meter of intertidal width increasing wrack biomass by approximately 1.5% and doubling wrack biomass leading to a ~2.4-fold increase in invertebrate biomass. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

The research aims to identify how intertidal zone width influences macrophyte wrack and invertebrate abundance on beaches.

March 10, 2026Estuaries and CoastsOpen Access

The Fucus Flow: Wide Intertidal Zones Amplify Rockweed Wrack Subsidies to Shoreline Invertebrates

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The research aims to identify how intertidal zone width influences macrophyte wrack and invertebrate abundance on beaches.
Analyzed macrophyte wrack and invertebrate abundance across 15 gravel beaches in Sitka Sound, Southeast Alaska.
Measured the width of intertidal zones and related it to wrack biomass and invertebrate numbers.
Quantified changes in biomass in relation to intertidal zone width.
Beaches with wider intertidal zones showed a 1.5% increase in wrack biomass per additional meter of width.
Doubling the macrophyte wrack biomass resulted in a 2.4-fold increase in invertebrate biomass.
Over 95% of the wrack biomass was from Fucus distichus, indicating its vital role in nutrient flow.

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Implication

Finds that wider intertidal zones boost nutrient subsidies to invertebrates, suggesting ecological significance.

Cite This Study

Francis D. Gerraty (2026) studied this question.

synapsesocial.com/papers/69af95de70916d39fea4df04 https://doi.org/10.1007/s12237-026-01680-y

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The Fucus Flow: Wide Intertidal Zones Amplify Rockweed Wrack Subsidies to Shoreline Invertebrates

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Discussion

Implication

Cite This Study

The Fucus Flow: Wide Intertidal Zones Amplify Rockweed Wrack Subsidies to Shoreline Invertebrates

Key Points

Discussion

Implication

Cite This Study

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