Sea-weeding enhances early coral survival on seeding devices, but benefits of seeding diminish after one year DOI Creative Commons
Hillary A. Smith, Genevieve Dallmeyer-Drennen, David G. Bourne

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 383, P. 125322 - 125322

Published: April 22, 2025

Borrowing from principles of aerial seeding in terrestrial reforestation, coral utilises "devices" designed to increase spat survival. However, device-assisted survival has not been compared natural survivorship, nor have devices trialled environments with strong competitors such as macroalgae. Herein, we deployed seeded alongside terracotta tiles, a proxy for recruitment dynamics. Tiles and were plots examining ongoing macroalgae removal ("sea-weeding"), was monitored over two years. First-year enhanced on survival, conferred the greatest benefit when areas where "sea-weeding" undertaken. second year, benefits sea-weeding lost, no significant difference control versus weeded plots. On average, retained 1.3 surviving colonies at years, which lower than naturally-occurring juvenile density plots, but higher Several factors influenced including starting density, orientation deployment surface, site. After 50 % yielded one live coral, site-based varied between 37 93 %. The estimated cost per accounting (high survival: $334 coral-1; low $577 coral-1), could be reduced via future efficiencies. results this study inform potential outcomes dominated reefs, highlight that assessing up year is sufficient measure long-term restoration goals.

Language: Английский

Optimizing in vitro fertilization in four Caribbean coral species DOI Creative Commons
Valérie F. Chamberland, Matthew‐James Bennett, Thomas Speck

et al.

PeerJ, Journal Year: 2025, Volume and Issue: 13, P. e18918 - e18918

Published: Jan. 31, 2025

Larval propagation and seeding of scleractinian corals for restoration is a rapidly expanding field, with demonstrated applications to assist the recovery declining populations on reefs. The process typically involves collecting coral reproductive material, facilitating in vitro fertilization (IVF), settling outplanting resulting offspring. Optimizing IVF can reduce gamete wastage increase larval yields propagation, therefore improving efficiency this intervention. In study we tested three conditions four Caribbean broadcast-spawning species (i.e., Diploria labyrinthiformis, Colpophyllia natans, Pseudodiploria strigosa, Orbicella faveolata) determine sperm concentration, age, co-incubation time highest success. For each species, exposed eggs from single dam pooled samples sires (1) at concentrations ranging zero 109 cell mL-1, (2) after letting gametes age 2 6 h, (3) period 15 120 min. These experiments revealed longevity least 4 h clear minimum concentration thresholds (>105 106 mL-1) all species. Fertilization took place much faster than expected (≤15 min) brain under study, whereas O. faveolata required 60 min achieve maximum We present these results context data available other hermaphroditic scleractinians. then provide recommendations breeding practitioners maximize production collections, finally, discuss our findings' potential implications dynamics during natural spawning events.

Language: Английский

Citations

1
Understanding the role of micro-organisms in the settlement of coral larvae through community ecology DOI Creative Commons
Abigail C. Turnlund, Paul A. O’Brien, Laura Rix

et al.

Marine Biology, Journal Year: 2025, Volume and Issue: 172(3)

Published: Feb. 7, 2025

Abstract Successful larval recruitment is essential to the growth of coral reefs and therefore plays a key role in recovery degraded worldwide. The rising intensity frequency environmental disturbance events their effect on establishment new corals outpacing natural capacity recover. To counter this, restoration programmes are increasingly turning interventionist approaches enhance recruitment, including mass-breeding aquaria for subsequent deployment field. Coral sexual propagation has potential generate large numbers genetically diverse recruits, but widespread application still limited by ability reliably guarantee successful settlement larvae. Identifying origins biochemical cues that prerequisite improving locations substrates. Microbial biofilms microbes associated with crustose coralline algae have been shown induce settlement, yet specific taxa mechanisms involved poorly understood. In this review we synthes current literature microbial challenges untaizengling origin individual originating within complex communities. Furthermore, call attention importance interrogating interactions holistic community approach further our knowledge both inducers inhibitors. Obtaining better understanding will lead more effective restoration, from engineering inductive communities synthesising can support aquaculture reef recovery.

Language: Английский

Citations

0
A comparison of in situ and on‐vessel larval rearing for coral seeding DOI Creative Commons
Carly J. Randall, Valérie F. Chamberland, Christine Giuliano

et al.

Restoration Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Coral sexual recruitment is critical to reef recovery yet often fails on degraded reefs. seeding one approach artificially increase the densities of coral settlers reefs and can be applied in many ways. A thorough comparison seeding‐method performance needed inform restoration decisions difficult undertake given cost complexities around employing multiple methods simultaneously. Here, we first designed a vessel‐based coral‐spawning aquaculture system. Then undertook an experimental larvae reared on‐vessel system with those situ rearing pools (SECORE basins [CRIBs]). We parameterized survival estimates assessed post‐deployment spat generated using each method. also quantified deployed across six sites inshore Great Barrier Reef. Larval was lower when than vessel (3.8 vs. 66.1%, respectively), but settlement behavior post‐settlement were comparable between treatments, yield averaging 66 72% after 3 months deployment, from CRIBs culture tanks, respectively. Spat 5 ± 8%. On‐vessel more costly supported higher survival, increased portability, enabled control manipulation conditions. By contrast, low‐cost, deployable shore, low‐maintenance. Armed this information, managers practitioners determine most appropriate method(s) for project.

Language: Английский

Citations

0
An improved CNN model in image classification application on water turbidity DOI Creative Commons
Ying Nie, Yuqiang Chen, Jianlan Guo

et al.

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 2, 2025

Language: Английский

Citations

0
Sea-weeding enhances early coral survival on seeding devices, but benefits of seeding diminish after one year DOI Creative Commons
Hillary A. Smith, Genevieve Dallmeyer-Drennen, David G. Bourne

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 383, P. 125322 - 125322

Published: April 22, 2025

Borrowing from principles of aerial seeding in terrestrial reforestation, coral utilises "devices" designed to increase spat survival. However, device-assisted survival has not been compared natural survivorship, nor have devices trialled environments with strong competitors such as macroalgae. Herein, we deployed seeded alongside terracotta tiles, a proxy for recruitment dynamics. Tiles and were plots examining ongoing macroalgae removal ("sea-weeding"), was monitored over two years. First-year enhanced on survival, conferred the greatest benefit when areas where "sea-weeding" undertaken. second year, benefits sea-weeding lost, no significant difference control versus weeded plots. On average, retained 1.3 surviving colonies at years, which lower than naturally-occurring juvenile density plots, but higher Several factors influenced including starting density, orientation deployment surface, site. After 50 % yielded one live coral, site-based varied between 37 93 %. The estimated cost per accounting (high survival: $334 coral-1; low $577 coral-1), could be reduced via future efficiencies. results this study inform potential outcomes dominated reefs, highlight that assessing up year is sufficient measure long-term restoration goals.

Language: Английский

Citations

0