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Related Experiment Video

Updated: Jun 25, 2026

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

Published on: July 2, 2018

Historical baselines for large marine animals.

Heike K Lotze¹, Boris Worm

¹Department of Biology, Dalhousie University, Halifax, NS B3H 4J1, Canada. hlotze@dal.ca

Trends in Ecology & Evolution

|March 3, 2009

Summary

This summary is machine-generated.

Marine historical ecology reveals that exploited populations have declined by 89% due to overexploitation and climate change. Conservation efforts are showing recent recoveries, providing context for ocean management.

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Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

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Last Updated: Jun 25, 2026

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

Methods for Image-based Surveys of Benthic Macroinvertebrates and Their Habitat Exemplified by the Drop Camera Survey for the Atlantic Sea Scallop

Published on: July 2, 2018

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging

Published on: April 18, 2025

Area of Science:

Marine Biology
Ecology
Historical Ecology

Background:

Understanding current marine ecosystem trends requires knowledge of past changes.
Marine historical ecology is an emerging interdisciplinary field reconstructing sea changes over time.

Purpose of the Study:

To review diverse approaches in marine historical ecology.
To identify historical patterns of change in marine megafauna and fish populations.

Main Methods:

Systematic review of 256 records in marine historical ecology.
Analysis of population changes in marine mammals, birds, reptiles, and fish.

Main Results:

Exploited marine populations show an 89% decline from historical abundance.
Long-term fluctuations correlate with climate variation; rapid declines linked to overexploitation.
Recent population recoveries are attributed to conservation measures.

Conclusions:

Historical ecology provides crucial context for contemporary marine ecosystem management.
Past changes in marine populations offer insights into ecosystem dynamics and resilience.