Exotic asphyxiation: interactions between invasive species and hypoxia
James E Byers1, Julie A Blaze1, Alannah C Dodd1
1Odum School of Ecology, University of Georgia, 140 E. Green St., Athens, GA, 30602, USA.
Biological Reviews of the Cambridge Philosophical Society
|September 13, 2022
Summary
Non-indigenous species (NIS) often tolerate and thrive in low oxygen (hypoxia) conditions, outcompeting native species. While often passengers, some NIS can drive hypoxia, impacting aquatic ecosystems.
Area of Science:
- Marine biology
- Ecology
- Environmental science
Background:
- Non-indigenous species (NIS) and hypoxia are significant anthropogenic stressors restructuring aquatic communities.
- Understanding their interactive effects is crucial due to intensifying global change.
Approach:
- A comprehensive review of 100 studies investigating the interaction between hypoxia and NIS.
- Analysis of patterns, outcomes, and generalizations regarding their combined impacts.
Key Points:
- 64% of studies indicate NIS tolerance to hypoxia; 62% show NIS outperforming native species under hypoxic conditions.
- NIS are more frequently passengers than drivers of hypoxia, though some primary producers create it.
- Hypoxia impacts are most significant at community and ecosystem levels, influencing invasion success.
Conclusions:
- The interaction between hypoxia and NIS requires integrated management strategies, as they are often managed independently.
- Future research should address study variations and refine insights into the complex interplay of these stressors.
- Considering interactive effects is vital for effective resource management and mitigating ecological disruption.
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