English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Coral δ18O variations are used as a proxy for changes in seasurface temperature (SST) and seawater isotope composition. Skeletal δ13C of coral is frequently used as a proxy for solar radiation becausemost of its variability is controlled by an interrelationship between threeprocesses: photosynthesis, respiration, and feeding. Coral growth rate isknown to influence the δ18O and δ13C isotope record to alesser extent than environmental variables. Recent published data showdifferences in growth parameters between female and male coral in thegonochoric brooding coral Porites panamensis; thus, skeletalδ18O and δ13C are hypothesized to be different in eachsex. To test this, this study describes changes in the skeletalδ18O and δ13C record of four female and six malePorites panamensis coral collected in Bahía de La Paz, Mexico,whose growth bands spanned 12 years. The isotopic data were compared to SST,precipitation, photosynthetically active radiation (PAR), chlorophyll a,and skeletal growth parameters. Porites panamensis is a knowngonochoric brooder whose growth parameters are different in females andmales. Splitting the data by sexes explained 81 and 93 % of thedifferences of δ18O, and of δ13C, respectively, in theisotope record between colonies. Both isotope records were different betweensexes. δ18O was higher in female colonies than in male colonies,with a 0.31 ‰ difference; δ13C was lower in femalecolonies, with a 0.28 ‰ difference. A difference in the skeletalδ18O could introduce an error in SST estimates of  ≈  1.0to  ≈  2.6 °C. The δ18O records showeda seasonal pattern that corresponded to SST, with low correlationcoefficients (−0.45, −0.32), and gentle slopes (0.09,0.10 ‰ °C−1) of the δ18O–SST relation.Seasonal variation in coral δ18O represents only 52.37 and35.66 % of the SST cycle; 29.72 and 38.53 % can be attributed toδ18O variability in seawater. δ13C data did notcorrelate with any of the environmental variables; therefore, variations inskeletal δ13C appear to be driven mainly by metabolic effects. Ourresults support the hypothesis of a sex-associated difference in skeletalδ18O and δ13C signal, and suggest that environmentalconditions and coral growth parameters affect skeletal isotopic signalsdifferently in each sex. Although these findings relate to one gonochoricbrooding species, they may have some implications for the more commonly usedgonochoric spawning species such as Porites lutea andPorites lobata

biogeosciences

Sex-associated variations in coral skeletal oxygen and carbon isotopic composition of &amp;lt;i&amp;gt;Porites panamensis&amp;lt;/i&amp;gt; in the southern Gulf of California