Drought legacies and ecosystem responses to subsequent drought

Area of Science:

• Ecology
• Climate Science
• Environmental Science

Background:

• Climate change intensifies drought frequency and severity.
• Droughts cause significant ecosystem perturbations with lasting effects, termed 'drought legacies'.
• Immediate drought impacts are known, but drought legacies require further study.

Purpose of the Study:

• To synthesize current knowledge on drought legacies and their underlying mechanisms.
• To highlight the relevance of legacy duration on ecosystem processes like carbon cycling and community composition.
• To propose future research directions for understanding drought legacies and their implications.

Main Methods:

• Literature synthesis of drought legacy research.
• Analysis of mechanisms driving drought legacies.
• Hypothesizing the influence of intrinsic and extrinsic factors on resilience.

Main Results:

• Drought legacies affect ecosystem structure and function at species, community, and soil levels.
• Legacy duration influences ecosystem processes, impacting carbon cycling and community composition.
• Intrinsic and extrinsic factors modulate ecosystem resilience to recurrent droughts.

Conclusions:

• A comprehensive understanding of drought legacies is crucial for predicting ecosystem responses to future droughts.
• Further research is needed to assess the long-term consequences of droughts on ecosystem structure and functioning.
• Understanding drought legacies is vital for effective ecosystem management under climate change.