Friday, July 17, 2009

Marine Ecotoxicology

Marine ecotoxicology is the study of the harmful effects of chemical pollutants on marine organisms and ecosystems such as corals, fish, oysters, mangroves and microalgae.

Significant proportions of pollutants from the Great Barrier Reef’s catchment reach the in-shore waters of the GBR during the intense flooding events that dominate north Queensland rainfall and river flows. Nitrogen levels in flood plumes are between 10 to 100 times higher than normal marine concentrations.

Coastal waters are also at risk from pollution derived from normal ship operations (such as waste disposal, vessel sewage, introduction of marine pests through ballast water and hull fouling, toxic compounds released from anti-fouling paints) and pollution caused by shipping accidents (such as vessel groundings and oil spills).

Apart from directly killing marine organisms, pollutants have the potential to cause sub-lethal effects such as disrupting symbioses and interfering with chemical cues responsible for key biological processes, including reproduction and recruitment.

Friday, July 10, 2009


Biological systematics is considered to be the study of the diversity of life on the planet earth, both past and present, and the relationships among living things through time. Systematics, is used to understand the evolutionary history of life on earth.

Systematics is often used synonymously with "taxonomy" and scientific classification." However, taxonomy is the describing, identifying, classifying, and naming of organisms. Classification is focused on categorizing organisms within specific groups that show their relationships to other organisms.

Systematics uses taxonomy as a means to understand organisms, as nothing about an organism's relationships with other living things can be understood without it first being properly studied and described in sufficient detail to identify and classify it correctly. Scientific classifications are aids in recording and reporting information to other scientists and to laymen.

A scientist who specializes in systematics is called a systematist. A systematist must be able to use existing classification systems to insure proper identification and classification of species.

Thursday, July 02, 2009

William sisters in final

WIMBLEDON— Venus and Serena Williams won in distinct fashion.
Two time winner Serena saved a match point and overcame Elena Dementieva 6-7 (4), 7-5, 8-6 in 2 hours, 49 minutes this is the longest women's semifinal at Wimbledon in last 40 years. Five time winner Venus, meanwhile, took only 51 minutes to knock down Dinara Safina 6-1, 6-0 and reach her eighth Wimbledon final.

"Oh my God, this is my eighth final, and it's a dream come to true to be here again and have the opportunity to hold the plate up," Venus said.The sisters, who hold 17 Grand Slam titles between them, will face each other Saturday on the Fourth of July in the finals.If Venus wins the title she will become the first woman since Steffi Graf in 1991-93 to win Wimbledon three years in a row.

"The more we play, the better it gets," Serena said. "When we play our match on Saturday, you know, it's for everything. This is what we dreamed of when we were growing up in Compton (California) 20-something years ago. This is what we worked for, and this is what we want. Like I wanted her to win today and she wanted me to win today. It's all come down to this."

Serena's father Richard Williams, who watched the match on Thursday, was the happiest man.