Increased local retention of reef coral larvae as a result of ocean warming

2014 ◽  
Vol 4 (6) ◽  
pp. 498-502 ◽  
Author(s):  
Joana Figueiredo ◽  
Andrew H. Baird ◽  
Saki Harii ◽  
Sean R. Connolly
Keyword(s):  
Reef Coral ◽  
Ocean Warming ◽  
Coral Larvae

scholarly journals A step-down photophobic response in coral larvae: implications for the light-dependent distribution of the common reef coral, Acropora tenuis

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yusuke Sakai ◽  
Kagayaki Kato ◽  
Hiroshi Koyama ◽  
Alyson Kuba ◽  
Hiroki Takahashi ◽  
...  
Keyword(s):  
Reef Coral ◽  
Benthic Organisms ◽  
Light Conditions ◽  
Coral Larvae ◽  
Mathematical Simulations ◽  
Photophobic Response ◽  
Acropora Tenuis ◽  
The Common ◽  
Step Down ◽  
Planktonic Larval Stage

Abstract Behavioral responses to environmental factors at the planktonic larval stage can have a crucial influence on habitat selection and therefore adult distributions in many benthic organisms. Reef-building corals show strong patterns of zonation across depth or underwater topography, with different suites of species aggregating in different light environments. One potential mechanism driving this pattern is the response of free-swimming larvae to light. However, there is little experimental support for this hypothesis; in particular, there are few direct and quantitative observations of larval behavior in response to light. Here, we analyzed the swimming behavior of larvae of the common reef coral Acropora tenuis under various light conditions. Larvae exhibited a step-down photophobic response, i.e. a marked decrease in swimming speed, in response to a rapid attenuation (step-down) of light intensity. Observations of larvae under different wavelengths indicated that only the loss of blue light (wavelengths between 400 and 500 nm) produced a significant response. Mathematical simulations of this step-down photophobic response indicate that larvae will aggregate in the lighter areas of two-dimensional large rectangular fields. These results suggest that the step-down photophobic response of coral larvae may play an important role in determining where larval settle on the reef.

scholarly journals Temperature mediated acquisition of rare heterologous symbionts promotes survival of coral larvae under ocean warming

2021 ◽  
Author(s):  
Shayle B Matsuda ◽  
Leela J Chakravarti ◽  
Ross Cunning ◽  
Ariana S Huffmyer ◽  
Craig E Nelson ◽  
...  
Keyword(s):  
Ocean Warming ◽  
Coral Larvae

scholarly journals Abundance, size, and survival of recruits of the reef coral Pocillopora acuta under ocean warming and acidification

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0228168 ◽  
Author(s):  
Keisha D. Bahr ◽  
Tiana Tran ◽  
Christopher P. Jury ◽  
Robert J. Toonen
Keyword(s):  
Reef Coral ◽  
Ocean Warming

Photo-movement of coral larvae influences vertical positioning in the ocean

Coral Reefs ◽  
2021 ◽  
Author(s):  
Aziz J. Mulla ◽  
Che-Hung Lin ◽  
Shunichi Takahashi ◽  
Yoko Nozawa
Keyword(s):  
Coral Larvae ◽  
Vertical Positioning

scholarly journals Vegetative Reproduction Is More Advantageous Than Sexual Reproduction in a Canopy-Forming Clonal Macroalga under Ocean Warming Accompanied by Oligotrophication and Intensive Herbivory

Plants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1522
Author(s):  
Hikaru Endo ◽  
Toru Sugie ◽  
Yukiko Yonemori ◽  
Yuki Nishikido ◽  
Hikari Moriyama ◽  
...  
Keyword(s):  
Growth Rate ◽  
High Temperature ◽  
Nutrient Availability ◽  
Vegetative Reproduction ◽  
Ocean Warming ◽  
Regeneration Ability ◽  
Combined Effects ◽  
Regeneration Rate ◽  
Fish Herbivory ◽  
C 30

Ocean warming and the associated changes in fish herbivory have caused polarward distributional shifts in the majority of canopy-forming macroalgae that are dominant in temperate Japan, but have little effect on the alga Sargassum fusiforme. The regeneration ability of new shoots from holdfasts in this species may be advantageous in highly grazed environments. However, little is known about the factors regulating this in Sargassum species. Moreover, holdfast tolerance to high-temperature and nutrient-poor conditions during summer has rarely been evaluated. In the present study, S. fusiforme holdfast responses to the combined effects of temperature and nutrient availability were compared to those of sexually reproduced propagules. The combined effects of holdfast fragmentation and irradiance on regeneration were also evaluated. Propagule growth rate values changed from positive to negative under the combination of elevated temperature (20 °C–30 °C) and reduced nutrient availability, whereas holdfasts exhibited a positive growth rate even at 32 °C in nutrient-poor conditions. The regeneration rate increased with holdfast fragmentation (1 mm segments), but was unaffected by decreased irradiance. These results suggest that S. fusiforme holdfasts have a higher tolerance to high-temperature and nutrient-poor conditions during summer than propagules, and regenerate new shoots even if 1-mm segments remain in shaded refuges for fish herbivory avoidance.

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