Pet Gazette June 2019 | Page 15

SOAPBOX | PET GAZETTE | 15 THE IMPACT OF EXTREME WEATHER ON PONDS By Dave Hulse, technical consultant at Tetra T he Met Office recently revealed that the UK is experiencing hotter days and more “tropical nights”. This is in addition to the country being exposed to more weather extremes over the last 10 years than previous decades. With this in mind, it’s safe to say that extreme summers and winters are becoming increasingly challenging for pondkeepers. Dave Hulse, technical consultant at Tetra UK offers advice for fish keepers on how to cope with severe seasonal weather conditions. The summer of 2018 was a real scorcher. According to the Met Office, it was the joint hottest on record, shared with the infamous summer of 1976. However, we should not confuse this extreme ‘weather’, (short term temperature, pressure, precipitation www.petgazette.biz conditions), with ‘climate’ – the average of these values over a long period of time. There is no doubt that the climate of the UK is shifting. The Met Office reports that the Central England Temperature has risen by about a degree Celsius since 1980, with 2006 being the warmest year on record. HOW DOES POND WATER REACT TO EXTREME SEASONAL WEATHER CHANGES? With the prevalence of warmer summers on the rise, pondkeepers should consider the impact of this on their garden pond. Interestingly, a considerable amount of heat is required to raise the temperature of liquid water. In fact, the amount of energy required to increase the temperature of one gram of a substance by one degree Celsius is called the ‘specific heat capacity’, and water has the highest specific heat capacity of any June 2019