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Global declines in human-driven mangrove loss.

Liza Goldberg^1,2,3, David Lagomasino^2,4, Nathan Thomas^2,3

¹Atholton High School, Columbia, MD, USA.

Global Change Biology

|July 13, 2020

Summary

This summary is machine-generated.

Human activities drove 62% of global mangrove loss from 2000-2016, mainly for agriculture and aquaculture, particularly in Southeast Asia. Natural causes are an increasing concern for coastal adaptation strategies.

Keywords:

Landsat climate change commodities deforestation mangrove shoreline erosion

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Area of Science:

Ecology
Environmental Science
Remote Sensing

Background:

Global mangrove ecosystems are highly threatened by human activities and natural processes.
Previous assessments lacked a global scale quantification of mangrove loss drivers.
Understanding these drivers is crucial for effective conservation and coastal adaptation.

Purpose of the Study:

To create the first global maps of mangrove loss drivers at 30m resolution from 2000-2016.
To quantify the contributions of human and natural stressors to mangrove loss worldwide.
To inform conservation and restoration initiatives with locally relevant data.

Main Methods:

Utilized a Random Forest-based analysis of over one million Landsat images.
Mapped mangrove loss drivers globally at 30m resolution for the period 2000-2016.
Differentiated between anthropogenic (land-use change) and natural (e.g., erosion) loss drivers.

Main Results:

Estimated that 62% of global mangrove losses resulted from land-use change (aquaculture, agriculture).
Identified Southeast Asia as a hotspot, accounting for up to 80% of human-driven losses.
Observed declines in both anthropogenic and natural losses, but natural loss increased in relative contribution.

Conclusions:

Conservation and restoration efforts show effectiveness over decadal timescales.
The increasing relative contribution of natural drivers presents an immediate challenge for coastal adaptation.
Globally mapped drivers provide crucial insights for targeted mangrove conservation and management strategies.