Wasp-Waist Interactions in the North Sea Ecosystem
Author Information
Author(s): Per Fauchald, Henrik Skov, Mette Skern-Mauritzen, David Johns, Torkild Tveraa
Primary Institution: Norwegian Institute for Nature Research (NINA)
Hypothesis
How do fluctuations in the abundance of clupeid forage fish affect the zooplankton community and the abundance of seabirds in the North Sea?
Conclusion
The study suggests that herring plays a crucial role in regulating seabird populations through bottom-up interactions, while both herring and sprat regulate zooplankton populations through top-down interactions.
Supporting Evidence
- Seabirds were positively related to herring, indicating a bottom-up interaction.
- Zooplankton groups showed negative relationships with sprat and herring, suggesting top-down interactions.
- Positive relationships among zooplankton groups were observed, indicating selective foraging by clupeid fishes.
Takeaway
This study found that fish like herring help seabirds find food, while also affecting tiny sea creatures called zooplankton. If there are fewer fish, it can change the whole ocean food chain.
Methodology
The study used linear models to analyze the relationships between seabird abundance, pelagic fish, and zooplankton over several decades.
Potential Biases
Potential biases in seabird counts due to varying detectability and sampling methods.
Limitations
The time series for seabirds was relatively short (19 years), which may limit the ability to detect significant relationships.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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