Spot On!
August 20th, 2010 by Paul Richardson
A few months ago, on the BBC’s Springwatch programme, I watched an interview with a scientist. This was not a professional scientist, but an amateur with acute powers of observation who had acted on her instinct over several decades. This person has been recording the precise date of the annual spring bud-burst on one individual oak tree near her home for more than 40 years. This very simple but reliable set of observations is now helping scientists to test hypotheses about how climate change is affecting trees, and by extension all wildlife.
Trees act as useful indicators of environmental change, since their developmental responses like bud-burst are closely linked to climatic conditions. However, the value of this research goes deeper than this, since trees are also often key species in food webs. Sessile oak, for example, is thought to host some hundreds of species of insect. The herbivorous insects, such as aphids, are especially important as they act as a food source for birds. The timing of insect egg hatching with respect to bud-burst is thought to be crucial, and part of the debate around the impact of climate change on this ecosystem has centred on the possible differential effect on bud-burst in plants and egg hatch in insect herbivores. In other words, earlier bud-burst in the spring could mean that the aphids hatch too late to feed on the tender young leaves, and the young birds may also miss out on a crucial food source.
Detailed information to test ideas like this doesn’t always emerge quickly from laboratory experiments, or from field studies. This is one reason why the Open University and the BBC have set up a database called iSpot (http://ispot.org.uk/), to which naturalists can add their observations. Over time, this will become a huge dataset which will help scientists to answer all kinds of questions. In order to add your observations, you don’t need any specialised knowledge, simply an ability to make careful observations, and to add a digital photo if are able to take one. There are specialists ‘on hand’ to check your observations, and if you are unsure what you have seen, they may be able to identify species. The service is open to all, and anyone can download the data and use it for their own purposes, from university level research down to a school project. The service is a real boon to adult educators, and community groups interested in conservation.
Individual observations may not tell us very much, but added together they can paint a powerful picture. There are many experienced and knowledgeable naturalists in all of our cities, towns and villages, who are constantly monitoring plants and animals. Quite a number work for, or are friends of, our botanic gardens. Pooling our collective wisdom about the flora and fauna which abound in our gardens and countryside will help us to develop a deeper understanding of the changing patterns of wildlife in Wales. In the long term, that will make us all wiser, and help us to conserve biodiversity for future generations.
