Video Transect-Based Coral Demographic Investigation DOI Creative Commons
Mohsen Kayal,

Eva Mevrel,

Jane Ballard

et al.

Coasts, Journal Year: 2023, Volume and Issue: 3(4), P. 370 - 382

Published: Nov. 6, 2023

Demographic studies that quantify species’ performances for survival, growth, and reproduction are powerful means to characterize sources of demographic bottlenecks predict community dynamics. However, they require fine-scale surveys populations in the field, often too effort-intensive be replicable at a large scale long term. We developed standardized digital approach extracting data on abundances, sizes, positions within video transects, enabling back-from-the-field acquisition therefore optimizing time spent field. The is based manual species identification, size measurements, mapping mimicking what traditionally performed though it can automated future with deployment artificial intelligence. illustrate our using reef-building coral New Caledonia. results composition as key ecological indicators reef health, shed light life strategies constraints their demographics, open paths further quantitative investigations. Key findings include diversity contrasting levels investment found among six taxa dominating (Acropora, Montipora, Porites, Galaxea, Favia, Millepora), indicating success. Our also indicate several have adapted mechanisms prevail under limiting hydrodynamic environments through propagation fragments. facilitates image-based investigations, supporting endeavors ecology ecosystem management.

Language: Английский

Coral recruitment: patterns and processes determining the dynamics of coral populations DOI Creative Commons
Peter J. Edmunds

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 98(6), P. 1862 - 1886

Published: June 20, 2023

Coral recruitment describes the addition of new individuals to populations, and it is one most fundamental demographic processes contributing population size. As many coral reefs around world have experienced large declines in cover abundance, there has been great interest understanding factors causing vary conditions under which can support community resilience. While progress these areas being facilitated by technological scientific advances, best tools quantify remains humble settlement tile, variants use for over a century. Here I review biology ecology recruits process, largely as resolved through tiles, by: (i) defining how terms 'recruit' 'recruitment' used, explaining why loose terminology impeded advancement; (ii) describing measured tiles value this purpose; (iii) summarizing previous efforts quantitative analyses recruitment; (iv) advances from hypothesis-driven studies determining refuges, seawater flow, grazers modulate (v) reviewing small corals (i.e. recruits) understand better they respond environmental conditions; (vi) updating compilation extending 1974 present, thus revealing long-term global density recruits, juxtaposed with apparent resilience bleaching. Finally, future directions study recruitment, highlight need expand deliver taxonomic resolution, explain time series tile deployments are likely remain pivotal quantifying recruitment.

Language: Английский

Citations

25
Early post-settlement events, rather than settlement, drive recruitment and coral recovery at Moorea, French Polynesia DOI
Peter J. Edmunds, Stéphane Maritorena, Scott C. Burgess

et al.

Oecologia, Journal Year: 2024, Volume and Issue: 204(3), P. 625 - 640

Published: Feb. 28, 2024

Language: Английский

Citations

5
Multi-year coral recruitment study across the Florida Reef Tract reveals boom-or-bust pattern among broadcast spawners and consistency among brooders DOI Creative Commons

LM Harper,

Lindsay K. Huebner,

ED O’Cain

et al.

Marine Ecology Progress Series, Journal Year: 2023, Volume and Issue: 721, P. 39 - 58

Published: Aug. 25, 2023

Scleractinian coral populations are in global decline, and successful recruitment is fundamental to community persistence recovery, but may vary by reproductive mode. Using settlement tiles, we assessed over 3 consecutive years across 4 regions (~300 km) of the Florida Reef Tract (FRT) determine whether spatio-temporal variation differs between brooding broadcast spawning corals recruit distributions correlate with adult live tissue area, site temperature, or depth. We deployed 32 tiles each 30 sites depths ranging from 2 18 m; were retrieved replaced annually. From 2016-2018, counted 11633 scleractinian recruits, most which belonged Siderastreidae, Agariciidae, Poritidae, Faviidae families. Faviid recruits rare (<1%). While agariciids poritids was relatively stable yr, siderastreids increased an unprecedented 70.7-fold 2017 2018, a boom that spanned 19 FRT. Elevated temperature during preceding season significant predictor low for all groups except faviids, taxa positively linked confamilial area. For siderastreids, area also related recruitment, direction relationship differed year region. The high Florida, preceded yr comparatively demonstrates broadcast-spawning scleractinians among marine capable employing boom-and-bust cycles geographically widespread areas.

Language: Английский

Citations

12
Coral recruitment in mesophotic coral ecosystems is lower and taxonomically distinct from shallow environments at Reunion Island, southwestern Indian Ocean DOI
Ludovic Hoarau, François Guilhaumon,

Sophie Bureau

et al.

Coral Reefs, Journal Year: 2025, Volume and Issue: unknown

Published: April 5, 2025

Language: Английский

Citations

0
High‐frequency variability dominates potential connectivity between remote coral reefs DOI Creative Commons
Noam Vogt-Vincent, Satoshi Mitarai,

Helen L. Johnson

et al.

Limnology and Oceanography, Journal Year: 2023, Volume and Issue: 68(12), P. 2733 - 2748

Published: Nov. 29, 2023

Abstract Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2‐km‐resolution ocean model, we simulate spawning events 1993 2019 and assess the potential all reefs in tropical southwest Indian Ocean. Although there is significant seasonal cycle connectivity, day‐to‐day variability generally dominates. Larval pathways on any particular day provide limited information about few days later. The magnitude of this high‐frequency depends local geography oceanography, with small isolated subject most Stochastic introduces considerable uncertainty predictions, imposing fundamental limitations what simulations can tell us inter‐reef connectivity. Protracted only significantly reduce associated likelihood larva settling. duration therefore more important parameter modeling coral than exact timing onset. Finally, find that proportion account for majority settling larvae, particularly at remote islands, demonstrate time‐mean picture may be inappropriate predicting demographic genetic Given diversity reef environments Ocean, expect these results will apply across tropics broadly, as well other weakly swimming taxa long‐distance dispersal.

Language: Английский

Citations

7
Coral recruitment in the Toliara region of southwest Madagascar: Spatio‐temporal variability and implications for reef conservation DOI Creative Commons
Radonirina Lebely Botosoamananto, Gildas Todinanahary,

Lahitsiresy Max Gasimandova

et al.

Marine Ecology, Journal Year: 2024, Volume and Issue: 45(2)

Published: Jan. 31, 2024

Abstract Investigating coral recruitment is critical to better understand replenishment and resilience capacities of reef ecosystems improve their conservation. Here, we examined the spatio‐temporal patterns influence confamilial adult cover in region Toliara, southwest Madagascar. Terracotta tiles were immersed from October late January over a 3‐year period (2018–2021) at 10 stations located on major habitats. Overall rates relatively high compared those other reefs Southwestern Indian Ocean, ranging 219.20 recruits.m −2 2018–2019 156.30 2020–2021. Recruit assemblages dominated by Acroporidae (45.5%) Pocilloporidae (45.0%), whereas Poritidae (1.9%) “other” recruits (3.6%) rarely recorded. Recruitment varied among habitats, with higher patch (187.06 ) outer slope (156.99 inner (108.04 ). With exception recruits, decreased between 2018 2019 2020, followed an increase 2020–2021 that reached or even exceeded initial values some stations. The abundance was positively correlated corals, highlighting potential stock–recruitment recruitment–limitation relationships, aggregative settlement young stages near established colonies, no such relationships recorded for family categories. This study identified sites consider prioritizing protection as hotspots, well degraded could benefit restoration, important caveat any measures should be accompanied alternative income‐generating activities through local involvement suits Malagasy context, locally marine managed areas.

Language: Английский

Citations

1
High-frequency variability dominates potential connectivity between remote coral reefs DOI Creative Commons
Noam Vogt-Vincent, Satoshi Mitarai, H. L. Johnson

et al.

Published: April 25, 2023

Abstract. Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2 km-resolution ocean model, we simulate spawning events 1993–2019 (for total of almost 10,000 events) across all coral reefs in the tropical southwest Indian Ocean. Although there is significant seasonal cycle potential at many day-to-day variability generally dominates. The importance this depends on local geography and oceanography. Stochastic introduces considerable uncertainty predictions, imposing limitations what simulations can tell us about connectivity. Protracted only few days significantly reduce associated with likelihood larva settling successfully. duration therefore likely more important parameter modelling than exact timing onset. Finally, find that small proportion account for majority successfully larvae, particularly remote islands, demonstrate time-mean picture may be inappropriate predicting demographic genetic

Language: Английский

Citations

2
Coral demographic performances in New Caledonia, a video transect approach to operationalize imagery-based investigation of population and community dynamics DOI Creative Commons
Mohsen Kayal,

Eva Mevrel,

Jane Ballard

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: May 14, 2023

Abstract Demographic studies that quantify species performances for survival, growth, and reproduction are powerful means to understand predict how communities respond environmental change through the characterization of population dynamics sources demographic bottlenecks. However, require fine-scale surveys populations in field, often too effort-intensive be replicable at large scale long-term. To surpass this obstacle, we developed a digital approach extracting data on abundances, sizes, positions within video-transects, facilitating back-from-the-field acquisitions community from video surveys. The is based manual coral identification, size-measurements, mapping along mimicking what traditionally performed thought it can automated future with deployment artificial intelligence. We illustrate our characterizations using reef-building New Caledonia recorded underwater cameras, therefore optimizing time spent field. results provide quantitative measures composition as key ecological indicators reef health, shed light life strategies constraints their demographics, open paths further investigations. Key findings include diversity terms relative investment found among taxa dominating community, indicating success several have adapted mechanisms prevail under limiting hydrodynamic environments. Our facilitates image-based extractions data, helping accelerate empirical endeavors ecology ecosystem management. Author summary Sustainable management requires comprehension processes affect resilience. Accurate reoccurring measurements helps us they responding various environments might happen future. mimics field measure abundance, size, distributions records ecosystems. This transition imagery-based researchers managers acquire while particularly studying remote extreme where access limited. application by characterizing vast tropical system Caledonia, such evaluations controlling resilience inexistent but necessary.

Language: Английский

Citations

2
High-frequency variability dominates potential connectivity between remote coral reefs DOI Creative Commons
Noam Vogt-Vincent, Satoshi Mitarai, H. L. Johnson

et al.

Published: April 25, 2023

Abstract. Coral larval dispersal establishes connectivity between reefs, but fluxes vary over timescales from daily to multidecadal due oceanographic variability. Using a 2 km-resolution ocean model, we simulate spawning events 1993–2019 (for total of almost 10,000 events) across all coral reefs in the tropical southwest Indian Ocean. Although there is significant seasonal cycle potential at many day-to-day variability generally dominates. The importance this depends on local geography and oceanography. Stochastic introduces considerable uncertainty predictions, imposing limitations what simulations can tell us about connectivity. Protracted only few days significantly reduce associated with likelihood larva settling successfully. duration therefore likely more important parameter modelling than exact timing onset. Finally, find that small proportion account for majority successfully larvae, particularly remote islands, demonstrate time-mean picture may be inappropriate predicting demographic genetic

Language: Английский

Citations

2
Video Transect-Based Coral Demographic Investigation DOI Creative Commons
Mohsen Kayal,

Eva Mevrel,

Jane Ballard

et al.

Coasts, Journal Year: 2023, Volume and Issue: 3(4), P. 370 - 382

Published: Nov. 6, 2023

Demographic studies that quantify species’ performances for survival, growth, and reproduction are powerful means to characterize sources of demographic bottlenecks predict community dynamics. However, they require fine-scale surveys populations in the field, often too effort-intensive be replicable at a large scale long term. We developed standardized digital approach extracting data on abundances, sizes, positions within video transects, enabling back-from-the-field acquisition therefore optimizing time spent field. The is based manual species identification, size measurements, mapping mimicking what traditionally performed though it can automated future with deployment artificial intelligence. illustrate our using reef-building coral New Caledonia. results composition as key ecological indicators reef health, shed light life strategies constraints their demographics, open paths further quantitative investigations. Key findings include diversity contrasting levels investment found among six taxa dominating (Acropora, Montipora, Porites, Galaxea, Favia, Millepora), indicating success. Our also indicate several have adapted mechanisms prevail under limiting hydrodynamic environments through propagation fragments. facilitates image-based investigations, supporting endeavors ecology ecosystem management.

Language: Английский

Citations

1