Navigation Links
Sydney harbors deadly diet for sea creatures
Date:4/7/2008

Contaminated seaweeds in Sydney Harbour could be threatening the small animals that feed on them, according to a new study revealing that the harbour's seaweeds have the world's highest levels of copper and lead contamination.

Up to 75 percent of the offspring of small crustaceans that feed on a common brown seaweed, for example, are killed when they are exposed to copper at levels found in some parts of the harbour, UNSW laboratory and field experiments have shown.

The UNSW study sampled seaweed from 10 bays within the harbour, ranging from 3km to 11km from Sydney Heads. Concentrations of copper, lead and zinc in a species of brown seaweed found in Woolloomooloo Bay, Balls Head Bay and Rushcutters Bay equal or exceed levels found in the Hong Kong Islands and Brazil's Sepetiba Bay, which are among the world's most heavy metal-contaminated waterways.

Heavy metals such as copper, lead and zinc find their way into Sydney Harbour from stormwater runoff, industrial waters and motorised watercraft. These seaweeds "bioaccumulate" metals inside their tissues and scientists use them to monitor environmental pollutants.

Published in an upcoming issue of the journal Environmental Pollution, it is the first investigation of the geographic relationship between metal contamination in seaweeds and the crustaceans that feed on them.

The study reveals that high concentrations of copper in one seaweed species (Padinacrassa) were associated with a low abundance of grazing amphipods - small shrimp-like creatures - that feed on algae. These creatures are highly abundant in all marine habitats: on average there are some 6,000 animals per square metre of algal bed in Sydney Harbour.

"The habitats that we sampled within Sydney Harbour contain among the highest concentrations of metals yet identified in brown seaweeds," says study lead author, Dr David Roberts.

"In seven of the 10 sample harbour sites, we measured copper concentrations in one seaweed species that exceeded levels known to threaten small crustaceans. These concentrations exceed all previously scientifically reported levels."


'/>"/>

Contact: David Roberts
d.roberts@UNSWalumni.com
61-425-349-558
University of New South Wales
Source:Eurekalert

Related biology news :

1. Giant ocean eddy shadows Sydney
2. Popular apple variety harbors unusual cell growth
3. Ayurvedic nightshade deadly for dengue mosquito
4. Deadly genetic disease prevented before birth in zebrafish
5. Research unveils new hope for deadly childhood disease
6. Best treatment identified to reduce deadly Staph infections
7. Northwestern to expose most deadly infectious diseases in 3-D
8. Scripps research team blocks bacterial communication system to prevent deadly staph infections
9. Scientists find how amber becomes death trap for watery creatures
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/23/2017)... ARMONK, N.Y. , Aug. 23, 2017  The general public,s help ... the human microbiome—the bacteria that live in and on the human body ... ... bacteria in the human microbiome, starting with the gut. The project's goal ... in disease. Photo credit: IBM ...
(Date:6/23/2017)... ARMONK, N.Y. and ITHACA, N.Y. ... IBM ) and Cornell University, a leader in dairy ... combined with bioinformatics designed to help reduce the chances ... breaches. With the onset of this dairy project, Cornell ... the Consortium for Sequencing the Food Supply Chain, a ...
(Date:5/16/2017)... , May 16, 2017   Bridge Patient ... organizations, and MD EMR Systems , an ... partner for GE, have established a partnership to ... product and the GE Centricity™ products, including Centricity ... These new integrations will allow ...
Breaking Biology News(10 mins):
(Date:10/7/2017)... ... October 06, 2017 , ... ... genomic technologies, launched its ProxiMeta™ Hi-C metagenome deconvolution product, featuring the first ... accompanying cloud-based bioinformatics software to perform Hi-C metagenome deconvolution using their own ...
(Date:10/6/2017)... ... October 06, 2017 , ... ... healthcare and technology sector at their fourth annual Conference where founders, investors, innovative ... speakers and the ELEVATE pitch competition showcasing early stage digital health and med ...
(Date:10/5/2017)... ... ... LabRoots , the leading provider of educational and interactive virtual events ... cancer research with a month-long promotion supporting the advancement of breast cancer research with ... promo code PinkRibbon to get 10 percent off their purchase of every the “Cancer ...
(Date:10/5/2017)... ... October 05, 2017 , ... NIH ... of its Nanobind DNA/RNA extraction technology . Nanobind is a novel magnetic ... surface and that can be used for a wide variety of sample preparation ...
Breaking Biology Technology: