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Biogeodynamics: bridging the gap between surface and deep Earth processes.

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Plate tectonics recycles essential elements between Earth's mantle and surface, supporting life. Understanding this biogeodynamic link is key to exploring habitability on exoplanets and Earth.

Keywords:
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Area of Science:

  • Geosciences
  • Astrobiology
  • Biogeochemistry

Background:

  • Life depends on essential elements cycled between Earth's crust and mantle.
  • Plate tectonics is crucial for recycling these elements, supporting the biosphere.
  • Nutrient supply to ecosystems relies on tectonic uplift and erosion.

Purpose of the Study:

  • To explore the biogeodynamic connection between Earth's deep processes and the biosphere.
  • To discuss methods for bridging the gap between deep Earth and biosphere research.
  • To focus on the long-term cycling and bioavailability of nitrogen and phosphorus.

Main Methods:

  • Review of plate tectonic processes and their role in element cycling.
  • Discussion of challenges in testing biosphere-geosphere feedbacks.
  • Focus on the global cycling of nitrogen and phosphorus over geologic time.

Main Results:

  • Plate tectonics is vital for recycling bioactive elements lost to the mantle.
  • Tectonic processes supply essential rock-bound nutrients to ecosystems.
  • The evolution of plate tectonics and continents was critical for Earth's biosphere.

Conclusions:

  • Plate tectonics and deep Earth processes are fundamental to life's sustainability.
  • Understanding these biogeodynamic links is essential for assessing exoplanet habitability.
  • Further research is needed to directly test feedbacks between the deep Earth and biosphere.