About Sponges

Videos

DEEP SEA

Monterey Bay Aquarium Research Institute (MBARI) scientists discovered new carnivorous sponges: Four new species of carnivorous sponges: Adapting to life in the deep sea.

Monterey Bay Aquarium Research Institute (MBARI) discovers a new species: The harp sponge: an extraordinary new species of carnivorous sponge.

 

MULTICELLULARITY

screenshot of CreatureCast video

CreatureCast - The Unexpected World of Biology: This video illustrates in animation how multicelluarity works - Multicellularity.

screenshot of Sponge Reaggregation video image

Extract from the BBC 's "First Life" Documentary: Sponge Reaggregation". Sponge cells can recombine after being separated into separate cells.

 

CLIMATE CHANGE AND OCEAN ACIDIFICATION

Effects of ocean acidification and temperature rise on the boring rates of spongesWatch this video about a scientist who studies the effect of ocean acidification on boring sponges.

Some sponges are adapting to a warming ocean much better than corals on coral reefs.

 

Reading

ORIGINS Animal Eve: Sponges

Excerpt from the Shape of Life book.

 

GENERAL INFORMATION ABOUT SPONGES

Were sponges the first animal?

Description of sponges with illustrations: Sponges - The Simplest Animals.

All about sponges: Ocean Animals - Sponges from the Missouri Botanical Garden.

Sponges have a very complex microbiome—a community of microorganisms—and each species has a very distinct set of microorganisms: Different Sponge Species Have Highly Specific and Stable Microbiomes from The Marine Biological Laboratory.

Genetic analysis showed that sponges were the first animals. Other scientists later argued that Ctenophore (comb jellies) were the first animals. In 2019 it seemed sponges were indeed the first but the argument likely will continue. 

The complete analysis of a sponges (2010) shows that it has “same core building blocks for multicellular form and function that still sits at the heart of all living animals, including humans: Read more in the Berkeley News.

 

FEATURED CREATURE

Carnivorous Sponges

Goiter Sponge

Barrel Sponge

 

DEEP SEA

New York Times article about carnivorous sponges: SpongeBob, the Carnivore.

 

MULTICELLULARITY

Sponges are multicellular and were the first animals. Multicellularity evolved in animals, starting with the sponge, and also evolved independently in other groups. “Simple multicellularity has evolved numerous times within the Eukarya, but complex multicellular organisms belong to only six clades: animals, land plants, some red algae, laminarialean brown algae, and two groups of fungi. Phylogeny and genomics suggest a generalized trajectory for the evolution of complex multicellularity.… The fossil records of animals and plants document key stages of this trajectory." Read full abstract at: Annual Reviews - Earth and Planetary Sciences, The Multiple Origins of Complex Multicellularity.

 

ROLE IN ECOSYSTEM

photo of a sponge

BBC Science and Environment article - "Sponges help coral reefs thrive in ocean deserts". Explains sponges' role in the ecosystem. The mystery of how coral reefs thrive in "ocean deserts" has been solved, scientists say. You can also download a pdf of this on-line article.

New York Times article - Researchers think that sponges helped oxygenate the deep ocean: This story is about “the first animals bootstrapping the environment into one where more complex animals could evolve. Read “Take a breath and thank a sponge".

Science Daily article "Scientists have found that some sponges can live and thrive on little oxygen".

Science News article - Read how sponges are taking over some coral reefs in the Caribbean (2015). Giant barrel sponges are hijacking Florida’s coral reefs.

Read About Sponges on Caribbean reefs: Sponges play a key role in the cycling of carbon and nitrogen on coral reefs 

Sponges have always been an important component of Caribbean coral reef communities, but they have become increasingly dominant as reef-building corals have declined because of stressors associated with climate change, disease, and pollution. Read about this change on reefs.

Sponge poop plays a key role in tropical reef ecosystems. Read more in the article: "Sponge feces as the driving force behind tropical coral reefs".

From the University of Michigan Museum of Zoology: Giant barrel sponges play an important role in coral reef ecosystems because they filter large quantity of water and provide habitat for other organisms. Read about one species giant barrel sponge.

Sponges harbor a large community of bacteria. These bacteria capture phosphorus, a key nutrient, in the water and turn it into a form that is available for the coral reef community. Read about how the bacteria in sponges contribute to the reef community.

Read about deep sea sponges and corals and the role they play in deep sea ecosystems in this article: "NOAA Deep Sea Sponges and Corals".

Sponges in the Ross Sea in the Antarctic play a key role in the ecosystem. Read the article here.

 

PHARMACEUTICALS

Sponges can’t move away from predators and they must compete for space in dense communities like coral reefs. So sponges have evolved an arsenal of chemicals for defense. Pharmaceuticals from natural products often are derived from these kind of defensive chemicals. So scientists have tested many compounds in sponges and several drugs have been developed with more being tested. Read more from Science Daily: "Bacteria From Sponges Make New Pharmaceuticals".

Researchers have tested compounds in sponges for medicines, called bioprospecting, and have found many useful compounds including antiviral drugs, like AZT used to fight HIV-AIDS, and the anticancer agents, were developed from extracts of sponges. Other compounds are being tested for anti-inflammatory and anti-bacterial drugs. Read more on the NOAA website: "Coral Reef Conservation Program".

Half of the body of sponges is made of bacteria. The relationship between sponges and bacteria may be very old. Scientists are conducting research on some of these bacteria to see what useful pharmaceuticals might be derived from the bacteria. 

Read about a scientist who “bio-prospects” for medicines from sponges in the Ocean Portal article: Five Questions for Shirley Pomponi, Medical Sponge Hunter.

 

BIOMIMICRY

Strong, but flexible sponges inspire new materials. Scientists created their own spicules, imitating the support structure of sponges. Read more in Science Daily: "Inspired by Deep Sea Sponges: Creating Flexible Minerals".

Read about how the structural strength of glass sponges has inspired design in the Wyss Institute article: Glass sponges hold internal secrets to structural strength.

From NPR "All Things Considered" - listen to story and read the article "Deep Sea Sponges Are Master Builders in Glass" that accompanies the story.

 

CLIMATE CHANGE AND OCEAN ACIDIFICATION

These sponges may benefit from increasing ocean acidification. Boring sponges – “boring” means excavating – break down and recycle the calcium carbonate of the reefs. These sponges play a key role in that recycling. And with increasing ocean acidification the calcium carbonate on the reef will be easier for the barrel sponge to excavate. From The Smithsonian Ocean Portal: "Ocean Acidification Excites Boring Sponges".

Images

Diver with a basket sponge Image icon Download basketsponge.jpg (1.7 MB)
Diver with a basket sponge Image icon Download basketsponge2.jpg (1.76 MB)
Vase sponge Image icon Download vase-sponge.jpg (1000.66 KB)
Sponge Image icon Download sponge2.jpg (1013.81 KB)
drawing of a Collarcell Image icon Download sponge-collarcell.png (78.25 KB)
Drawing of Proterospongia Image icon Download proterospongia.png (132.53 KB)