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NCCOS Assessment: Fertilization cross results examining genetic relatedness impact on successful reproduction in three species of reef building corals in the Florida Reef Tract in 2019 and 2022 (NCEI Accession 0289357)
Acropora cervicornis, A. palmata and Orbicella faveolata are important reef-building coral species in the Florida Reef Tract (FRT). These species have experienced alarming declines throughout the FRT, resulting in an increased risk of inbreeding depression and susceptibility to decreased fitness in surviving colonies. Acropora cervicornis, A. palmata and O. faveolata are broadcast spawners, introducing genetic diversity through sexual recombination of gametes during annual spawning events. Successful reproduction during this time is critical for curbing the deleterious effects of inbreeding depression, and in successfully restoring wild colonies to self-sustaining levels of genetic diversity. A critical step in the reproductive cycle of these species is the success of gamete fertilization following mass spawning events. Several abiotic causes of gametic incompatibilities have been reliably observed in these species, and incompatibility between certain genotypes has been shown to occur. This dataset represents the collection of gametes from three coral species following nine spawning events in the Florida Keys during two spawning years (2019 and 2022), reciprocal fertilization trials with gametes from each parent and determined fertilization success for each cross. Additionally, tissue fragments were collected from each A. cervicornis parent, DNA was isolated from the tissue and single nucleotide polymorphism analyses were performed using the Axiom Coral-Algae Genotyping array (Axiom AcropSNP, ThermoFisher Scientific). This data package contains images of coral eggs post fertilization trial and the results in spreadsheet format. The raw A. cervicornis single nucleotide polymorphism (SNP) data are also provided.
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Fertilization compatibility of spawning corals NCEI Accession 0160349
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This data set includes experimental results of fertilization assays to characterize genetic compatibility between individual parental genotypes. Targeted species include Acropora palmata and Orbicella faveolata. Microsatellite multi-locus genotypes for the O.faveolata parental population are included.
Fertilization compatibility of spawning corals in the Upper Florida Keys from 2014 to 2015 (NCEI Accession 0160349)
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This data set includes experimental results of fertilization assays to characterize genetic compatibility between individual parental genotypes. Targeted species include Acropora palmata and Orbicella faveolata. Microsatellite multi-locus genotypes for the O.faveolata parental population are included.
Experimental data comparing two coral grow-out methods in nursery-raised Acropora cervicornis
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Staghorn coral, Acropora cervicornis, is a threatened species and the primary focus of western Atlantic reef-restoration efforts to date. As part of the USGS Coral Reef Ecosystems Studies project (http://coastal.er.usgs.gov/crest/), scientists investigated skeletal characteristics of nursery-grown staghorn coral reared using two commonly used grow-out methods at Mote Tropical Research Laboratory’s offshore nursery. USGS staff compared linear extension, calcification rate, and skeletal density of nursery-raised A. cervicornis branches reared for six months either on blocks attached to substratum or hanging from monofilament line (on PVC “trees”) in the water column. The results demonstrated that branches grown on the substratum had significantly higher skeletal density, measured using computerized tomography (CT), and lower linear extension rates compared to water-column fragments. Calcification rates determined with buoyant weighing were not statistically different between the two grow-out methods, but did vary among coral genotypes. Whereas skeletal density and extension rates were plastic traits that depended on environment, the calcification rate was conserved. Results show that the two rearing methods generate the same amount of calcium-carbonate skeleton but produce colonies with different skeletal characteristics, and suggest that genetically based variability in coral-calcification performance exists. The data resulting from this experiment are provided in this data release and are interpreted in Kuffner et al. (2017).
Experimental data comparing two coral grow-out methods in nursery-raised Acropora cervicornis
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Staghorn coral, Acropora cervicornis, is a threatened species and the primary focus of western Atlantic reef-restoration efforts to date. As part of the USGS Coral Reef Ecosystems Studies project (http://coastal.er.usgs.gov/crest/), scientists investigated skeletal characteristics of nursery-grown staghorn coral reared using two commonly used grow-out methods at Mote Tropical Research Laboratory’s offshore nursery. USGS staff compared linear extension, calcification rate, and skeletal density of nursery-raised A. cervicornis branches reared for six months either on blocks attached to substratum or hanging from monofilament line (on PVC “trees”) in the water column. The results demonstrated that branches grown on the substratum had significantly higher skeletal density, measured using computerized tomography (CT), and lower linear extension rates compared to water-column fragments. Calcification rates determined with buoyant weighing were not statistically different between the two grow-out methods, but did vary among coral genotypes. Whereas skeletal density and extension rates were plastic traits that depended on environment, the calcification rate was conserved. Results show that the two rearing methods generate the same amount of calcium-carbonate skeleton but produce colonies with different skeletal characteristics, and suggest that genetically based variability in coral-calcification performance exists. The data resulting from this experiment are provided in this data release and are interpreted in Kuffner et al. (2017).
Growth rates of Acropora cervicornis corals used in Florida restoration from 2023-08-14 to 2023-10-27 (NCEI Accession 0301924)
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Six replicate fragments from each of twelve A. cervicornis genotypes from the University of Miami (UM) and twelve genotypes from the Nova Southeastern University (NSU) nurseries were collected and brought to the Experimental Reef Lab (ERL). At ERL, the growth rates of all the fragments were assessed using buoyant weight. For the UM genotypes, the maximum photosynthetic yield of the algal symbionts (Fv/Fm) was additionally measured.
NCCOS Assessment: Use of Omics to Support Coral Interventions: Proteomics of gametes collected from Acropora cervicornis, Acropora palmata, Orbicella faveolata to Optimize Sexual Reproduction in corals from Key Largo, FL, from 2022-08-13 to 2022-08-17, 2023-08-04 to 2023-08-05, and 2023-09-05
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This dataset is comprised of proteomics results to better understand gamete compatibility factors. The dataset includes gametes from three species, Acropora cervicornis, Acropora Palmata, Orbicella faveolate, which were collected in three locations near Key Largo, Florida (Ofav: Horseshoe Reef, Apal: North Dry Rocks, Acer: Carysfort) during three different time periods (August 2022, August 2023, and September 2023).
Raw light data, coral host genotypic information and zooxanthellae type and relative abundance from coral reefs in the Florida Keys 2015-09-21 to 2016-05-26 (NCEI Accession 0175572)
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Several parameters were used to assess coral bleaching in the Florida Keys as part of NOAA’s Coral Reef Conservation Program (CRCP). The data described in this package are light, seawater pH, and coral symbiont assemblage data collected from the upper and lower Florida Keys. Light data was collected using a PAR sensor which measures light as photosynthetically active radiation (PAR, umol m-2 s-1). Seawater pH was collected using a SAMI pH sensor or a SeaBird SeaFET pH sensor. These sensors were located at the same sites as the PAR sensors and recorded pH hourly. During peak bleaching (22-25 September 2015), 20 colonies of O. faveolata were sampled with a hammer and chisel from 10 sites (n=200 total coral samples). All corals were sampled from the top of the colony given that symbiont types can change with colony orientation. A small subsample was immediately preserved in 95% ethanol for genetic analysis. Genomic DNA was extracted using the organic extraction protocol described in Rowan and Power (1991). Quantitative PCR (qPCR) assays were used to understand patterns of algal symbiont community structure to detect the presence of background symbiont types. Zooxanthellae type and abundance data are described in this package to understand the relationship between O. faveolata and Symbiodinium to assess coral bleaching responses. Symbiont assemblages in the data set are described by clades A, B, C and D since O. faveolata has been shown to associate with members from all these clades.
Gene flow, recruitment and disturbance in two coral species on coastal and offshore reefs of north-western Australia
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Gene flow, recruitment and disturbance in two coral species on coastal and offshore reefs of north-western Australia