Plankton time - space dynamics in German Bight - a systems approach.

Area of Science:

• Marine Ecology
• Plankton Dynamics
• Ecological Theory

Background:

• Continuous plankton measurements provide valuable data for ecological analysis.
• Prey-predator theory is a key framework for understanding marine food webs.
• Trophic interactions significantly influence plankton population dynamics.

Purpose of the Study:

• To analyze long-term plankton data using prey-predator theory.
• To investigate local trophic feedback and population dynamics.
• To understand plankton population waves in the German Bight.

Main Methods:

• Utilizing long-term continuous plankton measurement data from Helgoland.
• Applying ecological functional analysis to prey-predator relationships.
• Computer graphics to visualize and analyze population wave progression over 18,000 km².

Main Results:

• Observed trophic feedback between phytoplankton, copepods, Noctiluca miliaris, Pleurobrachia pileus, and Beroe gracilis.
• Local prey-predator cycles conform to theoretical assumptions.
• Population dynamics are better understood as traveling waves rather than averaged processes.

Conclusions:

• Prey-predator cycles in the German Bight manifest as population waves.
• Long-term data analysis supports the application of ecological theory to marine systems.
• Understanding these population waves is crucial for North Sea ecosystem dynamics.