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Healthy coral populations produce a surprising number of offspring

Date:
October 18, 2017
Source:
Wiley
Summary:
Healthy coral populations can produce up to 200 times more juvenile corals than degraded coral populations nearby, according to a new study.
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Healthy coral populations can produce up to 200 times more juvenile corals than degraded coral populations nearby, according to a new study in Conservation Letters.

By studying one of the Caribbean's healthiest remaining coral reefs on the island of Curaçao, researchers found that healthy coral populations had a higher percentage of successful parents and each parent produced up to four times more offspring compared with corals in degraded populations. Combined with higher coral numbers overall, the healthy populations produced up 200 times more offspring per square meter of coral reef.

The conservation value of healthy coral reefs is therefore higher than previously thought because of their outsized contributions to coral reproduction and reef recovery. Traditionally, coral abundance was the most widely-used method for assessing reef health. This new study shows this measurement underestimates the hidden differences in reproduction between healthy and degraded reefs. Because coral offspring can swim and disperse to other reefs, the healthiest remaining coral reefs can help re-seed and regrow coral reefs on local and regional scales.

"Healthy reefs are critical nurseries for baby corals and they support the recovery of coral communities elsewhere," said lead author Dr. Aaron Hartmann.


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Materials provided by Wiley. Note: Content may be edited for style and length.


Journal Reference:

  1. Aaron C. Hartmann, Kristen L. Marhaver, Mark J. A. Vermeij. Corals in Healthy Populations Produce More Larvae Per Unit Cover. Conservation Letters, 2017; DOI: 10.1111/conl.12410

Cite This Page:

Wiley. "Healthy coral populations produce a surprising number of offspring." ScienceDaily. ScienceDaily, 18 October 2017. <www.sciencedaily.com/releases/2017/10/171018090203.htm>.
Wiley. (2017, October 18). Healthy coral populations produce a surprising number of offspring. ScienceDaily. Retrieved May 19, 2024 from www.sciencedaily.com/releases/2017/10/171018090203.htm
Wiley. "Healthy coral populations produce a surprising number of offspring." ScienceDaily. www.sciencedaily.com/releases/2017/10/171018090203.htm (accessed May 19, 2024).

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