Shifting seas: understanding deep-time human impacts on marine ecosystems

Area of Science:

• Marine biology
• Paleoceanography
• Environmental history

Background:

• Marine ecosystems have faced degradation for millennia due to human activities like harvesting, pollution, and climate change.
• Despite extensive research on recent impacts, ancient marine biodiversity and human exploitation patterns remain poorly understood in many regions.
• This theme issue explores past oceans through diverse disciplinary lenses to illuminate long-term human-marine interactions.

Discussion:

• Integrates material remains, historical records, and palaeoenvironmental archives to reconstruct past ocean conditions.
• Highlights how marine environments have shifted in response to both natural climate variability and cumulative human pressures.
• Emphasizes the value of interdisciplinary and cross-cultural collaborations for a comprehensive understanding of ocean change over deep time.

Key Insights:

• Reveals shifting seas shaped by millennia of human activities and natural climate shifts.
• Demonstrates how diverse approaches provide novel insights into ancient marine anthropogenic exploitation.
• Establishes the importance of understanding deep-time human impacts for effective marine conservation and restoration.

Outlook:

• Future marine restoration programs can benefit from deep-time baseline data for measuring recovery.
• Learning from past human-ocean stewardship practices, both effective and ineffective, can inform present-day conservation strategies.
• Diverse human-ocean interactions are essential for resilient and flourishing marine ecosystems in the future.