<div><p><span style="color:rgb(0, 51, 102); font-family:arial,helvetica,sans-serif; font-size:13.718px">These data are from 5-9 m depth and describe the density of small corals ≤ 40 mm diameter.</span></p></div>
Temperature and rainfall data for St. John USVI.
<div><p>Coral larvae are selective with regards to the surfaces upon which they settle, but little is known about the outcome of these choices. In this study, we explored the implications for juvenile scleractinians (less than 40-mm diameter) of growing on igneous versus carbonate rock on the shallow reefs (5-m depth) of St. John, US Virgin Islands. Surveys revealed that juvenile corals occurred at densities of 16 colonies m− 2 and were distributed on igneous and carbonate rocks in proportion to the abundance of these surfaces, suggesting that larvae do not discriminate between rock types at settlement. Repeated surveys demonstrated that all juvenile corals (i.e., pooled among taxa) grew 41% slower on igneous versus carbonate rock between January and August, but not between August and January when the growth was statistically indistinguishable between rock types. Although the growth of the most common juvenile coral, Porites astreoides, was similar on both substrata, the photophysiology of this species was affected by the type of rock. The maximum relative electron transfer rate (rETR, a proxy for photosynthesis) of P. astreoides was down-regulated 30% on igneous compared to carbonate rock. Phylogenetic analyses of the Symbiodinium community sequence profiles within P. astreoides revealed significant differences between substrata, with a greater diversity of co-occurring ITS-2 sequences in corals growing on carbonate compared to igneous rock. While substratum-dependent patterns in the characteristics of juvenile corals suggested there is selective value to the settlement choices made by larvae, these trends did not translate into differences in survival, at least over the time scale investigated. It remains uncertain what features of the rocks affected coral performance, but differences in the temperature of the rock may be an important feature during the warmest period of the year.</p></div>
Long-term juvenile coral data
<div><p><strong>BCO-DMO Processing Notes:</strong></p>
<p>-Reformatted column names to comply with BCO-DMO standards.<br />
-Added latitude and longitude to data</p></div>
736783
Long-term juvenile coral data
2018-05-17T14:50:41-04:00
2018-05-17T14:50:41-04:00
2023-07-07T16:10:26-04:00
urn:bcodmo:dataset:736783
Long-term juvenile coral density data from St. John USVI starting in 1994.
false
Edmunds, P. J. (2018) Long-term juvenile coral density data from St. John USVI starting in 1994. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2018-05-17 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/736783 [access date]
false
1
false
scleractinia
corals
populations
carbonate rocks
coral reefs
fringing reefs
polyps
larvae
community dynamics
demographics
2018-05-17
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736783
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1994-01 - 2016-09
1994-01
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2016-09
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2016
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