Mechanisms and potential immune tradeoffs of accelerated coral growth induced by microfragmentation

PeerJ

article

Louis Schlecker¹  Christopher Page²  Mikhail Matz³  Rachel M. Wright¹ 

[1] Smith College;Mote Marine Laboratory;University of Texas at Austin

关键词: Microfragmentation;    Coral immunity;    Growth and immunity;    Immunity tradeoffs;    Orbicella faveolata;    Montastraea cavernosa;    Innate immunity;    Reef restoration;    Coral genomics;    Outplanting;   

DOI  :  10.7717/peerj.13158

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Microfragmentation is the act of cutting corals into small pieces (~1 cm2) to accelerate the growth rates of corals relative to growth rates observed when maintaining larger-sized fragments. This rapid tissue and skeletal expansion technique offers great potential for supporting reef restoration, yet the biological processes and tradeoffs involved in microfragmentation-mediated accelerated growth are not well understood. Here we compared growth rates across a range of successively smaller fragment sizes in multiple genets of reef-building corals, Orbicella faveolata and Montastraea cavernosa. Our results confirm prior findings that smaller initial sizes confer accelerated growth after four months of recovery in a raceway. O. faveolata transcript levels associated with growth rate include genes encoding carbonic anhydrase and glutamic acid-rich proteins, which have been previously implicated in coral biomineralization, as well as a number of unannotated transcripts that warrant further characterization. Innate immunity enzyme activity assays and gene expression results suggest a potential tradeoff between growth rate after microfragmentation and immune investment. Microfragmentation-based restoration practices have had great success on Caribbean reefs, despite widespread mortality among wild corals due to infectious diseases. Future studies should continue to examine potential immune tradeoffs throughout the microfragmentation recovery period that may affect growout survival and disease transmission after outplanting.

【 授权许可】

CC BY