This week, with the weather getting cold and winter approaching, Roy decided it was time to show some of the pictures he took on his last trip to Gloucester Tops. Roy loves the Barrington and Gloucester Tops areas and is fascinated by the different types of plants which he sees there. One of the things which intrigues him most is the ‘life in miniature’ which he has noticed in the high, subalpine areas.
If you would like to visit Gloucester Tops you will need to follow Gloucester Tops Road. The road is sealed for some distance, but much of it is dirt and some even travels though farms – so watch out for cows! There are 6 river crossings to make, but they all have proper fords and we saw some quite small cars which had made the trip. Obviously, take care on these river crossings and NEVER enter flood waters. There is a flood detour which we saw signposted.
The areas which fascinate Roy in the Gloucester Tops are the subalpine areas. Subalpine areas are just under what is called the alpine area where it is too cold for trees to grow. In the subalpine areas it is cool all year round and much of the water which the plants receive comes from snow and ice. Until this snow and ice melts, the water is locked away and the plants can’t benefit. There is only a short growing season for plants in subalpine areas because of the cold and often it is also very windy and open. In Australia there are few species of tree which can grow in these harsh environments, and the main one is the Snow Gum. This tree is the hardiest of all of the eucalyptus. Unlike trees which grow in such cold conditions elsewhere in the world, the Snow Gum is an evergreen, adapting to have branches which droop under the weight of snow and allow the snow to fall off the leaves.
Other plants in the subalpine regions have made different adaptations. Plants in the subalpine areas have to grow quickly, with the time from flower to seed to germination being short because of the short growing season. Often the seeds can stay dormant in the winter and will not actually germinate until they detect a period of moist conditions which means the snow is melting and the warm growing season is starting. As water is not always easily available, the leaves are often tough, small and leathery to reduce the evaporation, and some are even rolled or covered with hairs! The most obvious adaptation though is in the size of plants. As you can see in the photos, there are plants which we see elsewhere growing in the subalpine zone, but they are very small! Even the Snow Gum is a small gum tree which only occasionally reaches 20 metres tall and usually only grows to between 4 and 8 metres tall!