Role
Principal Investigator
Description
Coral reefs face dual threats of climate change and local anthropogenic stressors, with losses of live corals often resulting in proliferated macroalgae (seaweeds). My previous National Geographic-funded research showed that a low-tech, simple approach of “sea-weeding” (i.e. removing seaweeds by hand) is effective in rehabilitating degraded, macroalgae-dominated reefs. Specifically, my 5-year research program resulted in a >600% increase in coral cover post-seaweed removal since 2018. These promising outcomes offer a cost-effective strategy for reef management, particularly for economically constrained island nations. However, the success of sea-weeding may be species-specific. On the studied reefs, Sargassum was the dominant genus of seaweed. Hence further research is required across diverse algal taxa to gauge the broader applicability of sea-weeding to improve coral reef resilience. Many South Pacific island nations are facing increased seaweed abundance as reefs continue to degrade. The loss of corals is catastrophic, as reefs form an integral part of Pacific culture, providing a significant proportion of dietary protein through reef-associated fish. Additionally, coral reefs provide shoreline protection for low-lying islands, and losses of reefs could contribute to oceanic inundation. The PALA and PAPA voyage locations are ideal candidates for implementing sea-weeding as a low-cost restoration and management technique. However, these reefs are relatively unexplored, with little recent quantitative documentation of reef community composition. Indeed, even where surveys exist, the taxonomic resolution of seaweed communities is lacking (i.e., all algae are grouped together as “algae” rather than genus- or species-level observations). Hence, the primary objective of this project is to explore the distribution and diversity of reef communities around the tropical South Pacific. The data collected will form a baseline understanding over a large geographic area of w
Date
25 Feb 2024 - 01 Oct 2024
Project Type
N/A
Keywords
coral reefs;south pacific;tropical macroalgae;seaweed
Funding Body
National Geographic Society - USA
Amount
20000
Project Team
Hillary Smith;David Bourne