Gregarious larval settlement mediates the responses of new recruits of the reef coral Acropora austera to ocean warming and acidification DOI Creative Commons
Lei Jiang,

Yuyang Zhang,

Chengyue Liu

et al.

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: Sept. 15, 2022

Gregarious larval settlement represents an important window for chimera formation in reef corals, yet it remains largely unknown how aggregated and early chimerism could modify the performance responses of coral recruits under elevated temperature p CO 2 . In this study, single broadcast spawning Acropora austera were exposed to contrasts two temperatures (28 versus 30.5°C) levels (~500 1000 μatm) weeks, algal symbiont infection success, survivorship growth assessed. Results showed that success was mainly affected by recruit type, with reduced at increased consistently higher chimeric compared recruits. Furthermore, although larger areal size had significantly all treatments, polyp-specific rates considerably lower entities than individual More importantly, type influenced temperature, chimeras exhibiting lowered skeletal lateral temperature. These results demonstrate benefits costs associated gregarious juvenile corals ocean warming acidification, highlight ecological role behavior mediating climate change stressors.

Language: Английский

The diversity and ecology of Symbiodiniaceae: A traits-based review DOI
Matthew R. Nitschke, Sabrina L. Rosset, Clinton A. Oakley

et al.

Advances in marine biology, Journal Year: 2022, Volume and Issue: unknown, P. 55 - 127

Published: Jan. 1, 2022

Language: Английский

Citations

38
The use of experimentally evolved coral photosymbionts for reef restoration DOI Creative Commons
Matthew R. Nitschke,

David Abrego,

Corinne E. Allen

et al.

Trends in Microbiology, Journal Year: 2024, Volume and Issue: unknown

Published: June 1, 2024

Language: Английский

Citations

8
Whole-genome duplication in an algal symbiont bolsters coral heat tolerance DOI Creative Commons
Katherine E. Dougan, Anthony J. Bellantuono, Tim Kahlke

et al.

Science Advances, Journal Year: 2024, Volume and Issue: 10(29)

Published: July 19, 2024

The algal endosymbiont Durusdinium trenchii enhances the resilience of coral reefs under thermal stress. D. can live freely or in endosymbiosis, and analysis genetic markers suggests that this species has undergone whole-genome duplication (WGD). However, evolutionary mechanisms underpin thermotolerance are largely unknown. Here, we present genome assemblies for two isolates, confirm WGD these taxa, examine how selection shaped duplicated regions using gene expression data. We assess free-living versus endosymbiotic lifestyles have contributed to retention divergence genes, processes enhanced . Our combined results suggest lifestyle is driver post-WGD evolution , with phase being most important, followed by endosymbiosis. Adaptations both likely enabled provide stress protection host coral.

Language: Английский

Citations

8
Whole-genome duplication in an algal symbiont bolsters coral heat tolerance DOI Creative Commons
Katherine E. Dougan, Anthony J. Bellantuono, Tim Kahlke

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2022, Volume and Issue: unknown

Published: April 11, 2022

Abstract The algal endosymbiont Durusdinium trenchii enhances the resilience of coral reefs under thermal stress 1,2 . As an endosymbiont, D. is generally expected to have a reduced genome compared its free-living relatives, due in part lack selective pressure for maintaining redundant gene functions stable intracellular environment within host 3 However, can live freely or endosymbiosis, and analysis genetic markers 4 suggests that this species has undergone whole-genome duplication (WGD). Here we present assemblies two isolates, confirm WGD these taxa, examine how selection shaped duplicated regions. We assess competing versus endosymbiotic lifestyles contributed retention divergence genes, processes enhanced thermotolerance corals hosting symbionts. find lifestyle driver post-WGD evolution , with phase being most important, followed by endosymbiosis. Adaptations both collectively result increased cellular fitness which provides protection coral. Beyond corals, polyploid alga valuable model understanding genome-wide forces act balance often, divergent constraints imposed lifestyles.

Language: Английский

Citations

26
Evolutionary Responses of a Reef-building Coral to Climate Change at the End of the Last Glacial Maximum DOI Creative Commons
Jia Zhang, Zoe T. Richards, Arne A. S. Adam

et al.

Molecular Biology and Evolution, Journal Year: 2022, Volume and Issue: 39(10)

Published: Oct. 1, 2022

Abstract Climate change threatens the survival of coral reefs on a global scale, primarily through mass bleaching and mortality as result marine heatwaves. While these short-term effects are clear, predicting fate over coming century is major challenge. One way to understand longer-term effect rapid climate examine response populations past shifts. Coastal shallow-water ecosystems such have been reshaped many times by sea-level changes during Pleistocene, yet few studies directly linked this with its consequences population demographics, dispersal, adaptation. Here we use powerful analytical techniques, afforded haplotype-phased whole-genomes, establish links for reef-building coral, Acropora digitifera. We show that three genetically distinct present in northwestern Australia, their divergence since last glacial maximum (LGM) can be explained combination founder-effects restricted gene flow. Signatures selective sweeps, too strong demographic history, all overlap genes different patterns functional enrichment between inshore offshore habitats. In contrast host, find photosymbiont communities largely undifferentiated corals from locations, spanning almost 1000 km, indicating selection host genes, not acquisition novel symbionts, has primary driver adaptation species Australia.

Language: Английский

Citations

22
Temperature‐mediated acquisition of rare heterologous symbionts promotes survival of coral larvae under ocean warming DOI Creative Commons
Shayle B. Matsuda, Leela J. Chakravarti, Ross Cunning

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(6), P. 2006 - 2025

Published: Dec. 27, 2021

Reef-building corals form nutritional symbioses with endosymbiotic dinoflagellates (Symbiodiniaceae), a relationship that facilitates the ecological success of coral reefs. These symbionts are mostly acquired anew each generation from environment during early life stages ("horizontal transmission"). Symbiodiniaceae species exhibit trait variation directly impacts health and performance host under ocean warming. Here, we test capacity for larvae horizontally transmitting coral, Acropora tenuis, to establish in four genera have varying thermal thresholds (the common symbiont genera, Cladocopium Durusdinium, less Fugacium Gerakladium). Over 2-week period January 2018, series both no-choice four-way choice experiments were conducted at three temperatures (27, 30, 31°C). Symbiont acquisition cell proliferation measured individual larvae. Larvae successfully maintained all experiments, >80% infected least when offered choice. Unexpectedly, Gerakladium increased dominance over time, high outcompeted which is regarded as thermally tolerant. Although displayed highest tolerance culture reached similar densities other 31°C, it remained background suggesting preference species. Larval survivorship 1 week was associated 27 30°C, however mortality treatments. We hypothesize currently rare (e.g., Gerakladium) may become more widespread climate Uptake such function survival strategy wild, has implications reef restoration practices use sexually produced stock.

Language: Английский

Citations

24
Symbiont Community Changes Confer Fitness Benefits for Larvae in a Vertically Transmitting Coral DOI Creative Commons
Daniel Olivares‐Cordero,

Courtney Timmons,

Carly D. Kenkel

et al.

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 1, 2025

ABSTRACT Coral reefs worldwide are threatened by increasing ocean temperatures because of the sensitivity coral‐algal symbiosis to thermal stress. Reef‐building corals form symbiotic relationships with dinoflagellates (family Symbiodiniaceae), including those species which acquire their initial symbiont complement predominately from parents. Changes in composition communities, through mechanisms shuffling or switching, can modulate host's limits. However, role coral acclimatization heat is understudied offspring and date has largely focused on adults. To quantify potential fitness benefits consequences changes communities under a simulated heatwave early life‐history stages, we exposed larvae juveniles widespread, vertically transmitting coral, Montipora digitata , stress (32°C) tracked growth, survival, photosynthetic efficiency, community over time relative controls. We found negative impacts warming all fitness‐related traits, varied significantly among larval families across stages. Larvae that survived exposure exhibited favored symbionts canonically more tolerant. Compared larvae, showed rapid mortality were fixed regardless temperature treatment, suggesting an inability alter as acclimatory response Taken together, these findings suggest capacity for may be modified ontogeny, juvenile life stage less flexible at risk climate this species.

Language: Английский

Citations

0
Interactions among wildtype and heat-evolved photosymbionts shape performance of coral recruits DOI Creative Commons
Elizabeth A. Ivory, Jos C. Mieog, Matthew R. Nitschke

et al.

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

Published: Feb. 25, 2025

Language: Английский

Citations

0
50 years of invertebrate conservation under the United States Endangered Species Act—history and threats to species DOI Creative Commons
Vaughn Shirey, Jayme M. M. Lewthwaite, Ann Marie Gawel

et al.

Frontiers in Conservation Science, Journal Year: 2025, Volume and Issue: 6

Published: April 1, 2025

Introduction The United States Endangered Species Act celebrated its 50th anniversary in 2023. As a hallmark piece of environmental legislation, the has successfully prevented extinction hundreds species. During these last 50 years, we have observed decline many species invertebrates, resulting listing 356 Methods Here, summarize state endangered invertebrates using text mining to review all documents, including decisions, status assessments, critical habitat designations, and reviews. In our review, evaluate most prevalent threats for aquatic terrestrial invertebrates. Results We found that been assessed listed consistently past eight years seen an uptick Further, find pollution, natural system modifications (such as dams), intrinsic factors small population sizes or number populations) are major contributing On other hand, problematic biotic invasive species), climate change, residential commercial development, pollution Discussion Overall, study reviews current provides baseline next face shifting threat conservation arena.

Language: Английский

Citations

0
Assessing the potential for “assisted gene flow” to enhance heat tolerance of multiple coral genera over three key phenotypic traits DOI Creative Commons
Alex Macadam,

Carys Morgans,

Jessica Cheok

et al.

Biological Conservation, Journal Year: 2025, Volume and Issue: 306, P. 111155 - 111155

Published: April 14, 2025

Language: Английский

Citations

0