Corals have evolved four lifestyles, study says

Sep 28, 2012
Pillar coral, Dendrogyra cylindricus. Image: NOAA

(—A new study by Simon Fraser University researchers will help scientists better understand and manage coral reef diversity by simplifying how to categorize coral species based on aspects of growth and reproduction.

"We hope that understanding and reducing the complexity of coral life histories can help scientists, managers, and stakeholders make better predictions about how their reefs will fare in the face of , , and other human disturbances," says Emily Darling, a PhD student in the Earth to group with SFU Biological Sciences.

The research study, Evaluating life-history strategies of reef corals from species traits, was recently published in the journal, . Five people collaborated in the study, including three from SFU: Lorenzo Alvarez-Filip, Isabelle M. Côté, and Darling.

Corals have evolved over millions of years and have a bewildering diversity of sizes, shapes, and colours. Darling and her group compiled existing information for 11 characteristics of corals and found these important reef architects have evolved four similar lifestyles despite their widespread distribution throughout the tropics.

The study identified four lifestyles to characterize the main ecological strategies of the corals:

· Competitive: Some corals are top competitors on reefs and can quickly grow and create canopies that over-top less competitive corals.

· Stress tolerant: Other corals that employ a different strategy and better cope with harsher environments by growing slowly and forming large colonies that can be hundreds of years old.

· Weedy: These pioneer species appear to be adapted for colonizing newly opened space on reefs by forming small colonies and investing in larvae through a type of reproduction called brooding.

· Generalist: Some species have a "grab bag" of characteristics and share features in common with all three of the other groups.

"What is also really interesting," says Darling, "is that corals appear to have evolved very similar ways of adapting to their environment as plants, despite being very different organisms."

Corals and plants are physically attached to their habitat and the research may explain why these organisms have evolved similar ways to cope with harsh conditions and periodic disturbances.

" are extremely biologically diverse, and this diversity provides a huge amount of free goods and services to people, not just in tropical areas but around the world," says Darling. "These goods and services include fish and seafood, coastal protection, and a huge tourism industry."

Explore further: HabCamV4 sees large numbers of young scallops off Delaware Bay

More information:

Related Stories

Sponge competition may damage corals

May 03, 2011

Sponges are a group of common and diverse aquatic creatures, very abundant in coral reefs where they are an important part of the ecosystem. But new research has found that if the balance is disturbed, sponges ...

Depth important in generating reef diversity

Jun 10, 2010

( -- A study by University of Queensland researchers reveals that corals are more adapted to smaller ecological niches than previously thought, and provides new insights into the processes that ...

Viruses linked to algae that control coral health

Jul 12, 2012

Scientists have discovered two viruses that appear to infect the single-celled microalgae that reside in corals and are important for coral growth and health, and they say the viruses could play a role in ...

Recommended for you

Grunter's life choices chronicled in fisheries study

1 hour ago

Research into populations of the western striped grunter (Pelates octolineatus) on the lower west coast shows the species has a highly seasonal growth pattern and migrate between coastal and estuarine environments ...

Baby seals that practice in pools make better divers

7 hours ago

Being able to dive is what matters most for seal pups, but how do they learn to do it? Grey seal pups that can play in pools may have better diving skills once they make the move to the sea, and this could ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.