This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Curtin University scientists have uncovered an important missing piece in the puzzle of how some coral reefs can recover from climate events, providing information that could help guide future conservation and restoration efforts. Researchers visited Ningaloo Reef off the Western Australian coast to investigate Porites corals, a group of reef-building corals that play a major role in creating and maintaining reef habitats throughout the Indo-Pacific.
For the first time, the team was able to determine when some of Ningaloo Reef's most important corals reproduce, creating a benchmark that will help scientists track the effects of marine heat waves, assess reef recovery and identify opportunities for restoration. The work is published in the journal Marine Biology. Lead author and Ph.D. candidate David Juszkiewicz, from Curtin's Coral Conservation and Research Group, said understanding coral reproduction was essential because reefs could not recover unless corals successfully produced the next generation.
"When people think about reef recovery, they often focus on whether corals survive a bleaching event, but survival is only part of the story," Juszkiewicz said. "A damaged reef doesn't recover simply because some corals stay alive: it recovers because those corals produce offspring that go on to replenish and rebuild the reef. "If we don't know when key reef-building corals reproduce, it's much harder to measure whether reefs are recovering successfully, understand the impacts of climate change or support restoration programs that rely on collecting coral eggs and larvae." The researchers examined 20 coral colonies from Ningaloo Reef and found evidence that two important reef-building species, Porites lutea and Porites lobata, were preparing to spawn during the reef's annual early fall mass spawning period.
The findings provide the first reproductive baseline for these species at Ningaloo. Researchers found no signs of reproduction in a third species, Porites australiensis, during either sampling period, suggesting it may spawn at a different time of year. The finding raises the possibility that some of Ningaloo's major reef-building corals do not follow typical reproductive schedules, highlighting the need for year-round monitoring of reproductive activity to better understand how different species respond to heat waves and contribute to reef recovery.
Juszkiewicz said the findings have practical implications for conservation programs that collect coral eggs and larvae for reef restoration projects. "Timing is everything in coral restoration," Juszkiewicz said. "If scientists miss a spawning event, they may have to wait another year for the next opportunity.
"Knowing when keystone corals reproduce helps scientists and managers plan restoration programs to ensure they are ready to collect reproductive material at the right time." Discover the latest in science, tech, and space with over 100,000 subscribers who rely on Phys.org for daily insights. d research that matter—daily or weekly. The study also found Ningaloo's Porites corals appear to reproduce in early fall, unlike populations of the same species recorded farther north near Dampier, where spawning has been observed in late spring and early summer. Senior author associate professor Zoe Richards, leader of the Coral Conservation and Research Group from the School of Molecular and Life Sciences at Curtin University, said these regional differences could influence how reefs recover and replenish themselves after disturbances such as marine heat waves.
Extract — continue reading at the source.
