When lava flows and glaciers recede, predicting how species take over

May 23, 2007
Receding Glacier in Alaska
Primary succession following a receding glacier in Alaska. Credit: K.J. Anderson

When fire, clearcutting, lava or receding glaciers create empty habitat, species arrive to form a new ecological community. Adverse conditions -- such as isolation of the new community or an unfavorable climate -- may hinder the arrival of new species and change the pattern of succession. This study provides a framework to understand why communities mature at different rates, which is fundamental to managing clear cuts or fire.

Whenever an event such as a fire, clear cut, or lava flow creates an empty habitat, species arrive, interact, and assemble to form a new ecological community—a process known as "succession." How quickly does succession proceed?

Most ecologists might expect change to be rapid at first and then decline as the community ages, but there was no systematic analysis of this idea until recently. In a study published in the June issue of the American Naturalist, ecologist Kristina Anderson of the University of New Mexico showed that in many communities—ranging from plants in abandoned agricultural fields to arthropods on carcasses—species do indeed turn over most rapidly early in succession, when many new species arrive to take advantage of available resources.

However, she also found that certain adverse conditions—such as isolation of the new community or an unfavorable climate—may hinder the arrival of new species, thereby slowing the rate at which the community fills with species and sometimes causing peak rates of change to occur later in succession.

Anderson's study provides a framework to understand why communities mature at different rates. According to the author, "Understanding how quickly new ecological communities develop is fundamental to numerous ecological questions ranging from, 'How often should fires or clear cuts be allowed on landscapes?' to 'What determines how many species are found on an island?' yet we were unable to make many generalizations about succession rate. That is what motivated this study."

In her study, Anderson first developed a method for quantifying rates of community change and how these vary as the community ages. She then collected data on over 60 different communities—a novel approach in succession research—and documented the changes in species composition throughout succession. Using these results, she was able to relate temporal patterns in rates of community change to processes that limit colonization and persistence of species: competition, harsh environmental conditions, and difficulty getting to the site.

The author states, "We still have many unanswered questions regarding rates of succession. My hope is that this study will inspire and inform future research on succession rate."

Source: University of Chicago

Explore further: Researchers prove complex connection between plants and what soil microbes eat

Related Stories

Making intricate images with bacterial communities

March 19, 2018

Working with light and genetically engineered bacteria, researchers from Stanford University are able to shape the growth of bacterial communities. From polka dots to stripes to circuits, they can render intricate designs ...

Predators learn to identify prey from other species

March 21, 2018

Wolves purportedly raised Romulus and Remus, who went on to rule Rome. Is there good scientific evidence for learning across species? Researchers at the Smithsonian Tropical Research Institute (STRI) in Panama wanted to know ...

How animal parasites find a home in humans

March 21, 2018

There has been a lot of buzz recently about a video shared by Oregon woman Abby Beckley removing worms from her eye. Researchers at the Centers for Disease Control and Prevention released a case report documenting Beckley's ...

Leaving fossils behind for the future of transport

March 21, 2018

One of the key challenges we face as a species in the 21st century is how to co-exist with nature in a sustainable manner whilst maintaining our way of life and extending these benefits across the developing world. This basic ...

Recommended for you

Wood pellets: Renewable, but not carbon neutral

March 22, 2018

A return to firewood is bad for forests and the climate. So reports William Schlesinger, President Emeritus of the Cary Institute of Ecosystem Studies, in an Insights article published today in the journal Science.


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.