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Climate Change Damaging To Soil Phosphorus, Increased Water Toxicity Results

by Tanya Thomas on  April 18, 2009 at 10:22 AM Environmental Health   - G J E 4
 Climate Change Damaging To Soil Phosphorus, Increased Water Toxicity Results
Climate change is a potential threat to natural resources too, after a recent research revealed that it leads to a devastating loss of phosphorus from soil.
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The research was done by scientists from the Biotechnology and Biological Sciences Research Council (BBSRC)-funded North Wyke Research.

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They found for the first time that the rate at which a dried soil is rewetted impacts on the amount of phosphorus lost from the soil into surface water and subsequently into the surrounding environment.

According to Dr Martin Blackwell who is one of the project leaders, "Our preliminary results show that despite best efforts, the changing climate may limit our ability to mitigate phosphorus losses at certain times of the year, especially summer."

"This is really worrying because high phosphorus concentrations in surface waters can lead to harmful algal blooms which can be toxic, cause lack of oxygen during their decay and disrupt food webs. This can also affect the quality of water for drinking and result in the closure of recreational water sport facilities," he said.

Under laboratory conditions, Dr Blackwell and his team re-wet dried samples of UK grassland soil over different time periods, ranging from two hours to 24 hours using the same quantity of water.

The leachate - water that has washed through the soil - was then analyzed for phosphorus.

The study showed that the rate at which a dried soil is rewetted affects the concentration and forms of phosphorus lost in leachate which could potentially contaminate surface water bodies, like rivers and lakes.

The current research looked at only one soil type so it is not yet known whether other soil types would react in the same way.

This is what Dr Blackwell and his team will look at next.

Source: ANI
TAN
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