A report in Global Ecology and Biogeography (Global Ecology and Biogeography) by researchers of the Scientific and Industrial Research Organization (CSIRO) said the movement of many fish species to the south will is a hot spot of ongoing climate change.
The movement of many fish species to the south will be a hot spot of climate change. (Photo: Internet).
According to the report, in Australia 45 species of fish account for 30% of the total number of near-shore species in the region having major climate-related migrations.
The researcher Alistair Hobday of CSIRO, who contributed to drafting the report, said: " The study is based on materials, surveys, statistics on fishing, trade statistics, but the underwater photos from the late 19th century to the present '.
Temperature rise is happening
According to Hobday waters in southeastern Australia are undergoing a temperature change process: " Observations over the past 40 years show that along the east coast the temperature is constantly increasing, four times the average of that The world is 0.6 degrees Celsius in a hundred years, and the current flows to the south, so the level of heating is doubled, and as a result, some fish migrate south to find new places of residence .
This means that fish that previously lived in Queensland are now moving to New South Wales, from New South Queensland to Victoria, and from Victoria to Tasmania. The temperature of seasonal fluctuating water from 12 to 22 degrees Celsius is the biggest impact.
Causes and consequences
A 2006 report mentioned the cause of fish migration.
This latest study has shown: pollution and temperature rise over time. According to Hobday, " the 40-year recorded data demonstrate that the temperature rises continuously along with the increased amount of dissolved CO2, which causes the pH of the seawater to fall ." sensitive to the environment.
That movement is beneficial in this respect, on the other side of the waters in Australia. For example, marine fish passing through the Bass Bay into the Tasmanian area have destroyed the seaweed layer which is harmful to some species, but creates habitat for other species. Fish species in New South Wales moving to Tasmanian are also good news for fishermen.
However, after that, where will the fish move? The future will answer that.