Wednesday 30 November 2016

Funny place to find a chicken?

Kingdom: Fungi
Family: Fomitopsidaceae
Genus: Laetiporus
“The chicken of the woods”. This may sound like some wild species of chicken which roams freely in forests, but it is actually a fungus that grows on decaying deciduous trees (much less exciting, I know). The name comes from the fungus’ extraordinary resemblance to chicken meat when it is cooked, although not all parts of the mushroom is edible. It has the same texture and ‘peeling’ you get with chicken, and the taste resemblance is also said to be remarkable. It is even used as a vegetarian substitute for chicken as a delicacy. If not cooked properly, however, it can give you bad stomach pain, although not as bad as if you eat uncooked actual chicken meat! It can also give you swollen lips, nausea, vomiting, and dizziness, so double check the cooking instructions if you’re giving it a go.



The colour of chicken of the woods varies from species to species, ranging from an off-white colour to bright orange. This is one of the paler specimens, especially due to the time of year. They usually grow between May and November so this specimen is now likely very old, leading to it becoming paler and almost chalk-like. As it has passed is prime, it is likely that this specimen would give you some of the symptoms I mentioned earlier if you ate it, even if you cooked it properly. They are important in breaking down tough materials wood is made of and returning the nutrients from the decaying organism to the soil.




They can grow up to huge sizes, and as this is clearly a large bracket of the mushrooms it is likely that it has been cut back, which is why they lack the normal lobed structure. It is likely that it hasn’t been completely removed as this way it can continue decomposing the dead wood without creating an obstruction on the path, and it removes the need for the big task of removing the tree stump manually. What a useful little chicken!






Monday 28 November 2016

A splash of colour!

Kingdom: Plantae
Family: Cornaceae
Species: Cornus sanguinea
One of the most brightly coloured shrubs growing around the UEA broad is the red dogwood. Dogwoods produce creamy white flowers in the spring, followed by blue/white berries with dark green leaves, which redden in autumn. The leaves then fall to reveal beautifully brightly coloured stems due to being a deciduous species. They are an independent species, and need very little management although coppicing should take place every February/March, cutting them down to a woody base within 4” of the ground before they bud. They need full sun to partial shade and are in a good location for sunlight next to the UEA broad, in an area that has few trees to obscure sunlight. They most often grow on the margins of woodland so they fit right in! They aren’t fussy about their soil conditions and can grow in damp soil, which is usually where they grow if wild. They are wildly sold as plants for people to plant in their gardens too, usually to add colour in winter. Their flowers are hermaphrodite and are small at around 5-10 millimetres in diameter and are insect pollinated. They produce a black berry fruit containing a single seed, called "dogberries".


This species of dogwood is native to most of Europe and Western Asia. Its leaves provide food for some animals, and dogberries are eaten by some mammals and many birds. Other species of dogwood are native to North America and Eastern Asia, where they have been traditionally used for a variety of purposes. Native Americans use the inner bark in tobacco mixtures in their sacred pipe ceremony. Some tribes eat the sour berries (usually eaten by birds – up to 18 species) to treat colds and to slow bleeding, whereas others made arrow shafts and tools from the branches and shoots due to the wood being so hard. This lead to the origin of the name “dogwood” – this has nothing to do with dogs, instead it originated from an old word “dag” which refers to a sharp tool. The leaves, bark and roots were also used to make medicine, and it is widely used for basket weaving. If bark is gathered in early spring, it retains its deep red colour when dried.



Friday 18 November 2016

The many uses of Mullein

Kingdom: Plantae
Family: Scrophulariaceae
Species: Verbascum thapsus
Mullein is a plant also known as velvet dock. This is due to its velvety texture, which is its main distinguishable feature and is due to its soft, downy hairs. These help the leaves retain moisture. The leaves are large, sometimes up to a foot long, and a silvery-grey colour. The seeds are poisonous and are not used in herbal medicine. It is easily grown in Europe, North America and in parts of Asia. There are about 360 species of mullein. It can adapt to various environments.





The use of mullein in herbal medicine goes back to the Greek times, when the physician Dioscorides mentioned the benefits of Mullein against coughs. Mullein contains coumarin and rotenone, a natural insecticide and fish poison, which is supposed to be non-toxic to mammals. Uses include:

-    - Both external (ointment, compresses) and internal (tea, smoking) uses.
-    - When combined with matter, mullein produces a substance called mucilage, which coats and soothes the throat. Mullein tea is used for coughs and other respiratory illnesses, such as tuberculosis.
-    - It can sooth the intestine and be used to treat diarrhoea.
-    - The soothing mucilage has anti-inflammatory and antibacterial properties which help relieve haemorrhoid symptoms.
-    - Yellow flowers in certain species of mullein were once used as a source of yellow hair dye.
-    - Leaves can be applied to soften and protect the skin.
-    - Oil from the flowers can soothe earaches.
-    - Compresses made from mullein infusions can treat inflamed cold sores and herpes. There is one study where mullein seemed to help eliminate the herpes virus.
-    - Leaves can be used as toilet paper due to their soft texture.
-    - Can also be used to treat burns, bruises and gout.
-    - Has been used since Roman times for torches to repel witches.

Mullein is a very diverse plant and has many uses. It is often confused with lamb’s ear. Lamb’s ear produces pinkish-purple flowers, is much smaller and has softer leaves. The weeds found on campus are mullein as they grow as a rosette from a central stalk and have less soft leaves.

Due to the hair on the leaves, grazing animals do not eat them because they irritate their mucous membranes in the gut. It is an invasive plant, and once it is established in an area it is difficult to eradicate which is why it is so abundant on campus. The plants on campus have only recently being established, as they only have the base and have not gained height. The early structure of wide but short makes it possible for the most sunlight to fall on them.



It has a honey-like scent and local insects become pollinators of common mullein which leads to its development. A single common mullein plant can produce between 100,000 and 180,000 seeds which can lay dormant yet viable in the soil for many years, which is why its so hard to eradicate.

Friday 11 November 2016

Shetland pony behaviour observations

One of the many underrated features of the campus which I have only just discovered - fields behind the lake full of horses, ponies and donkeys! I went for 7 weeks without knowing they were here so thought I'd write about some of the behaviour I saw in the hour or so that I was there.

Grooming




Ponies partake in social grooming. It can be used for bonding, to reconcile or resolve conflicts, as well as to clean themselves. This includes removal of items including dead skin, foreign objects, insects, ectoparasites, leaves dirt etc. 


Itching on the fence



This particular pony in the image was itching itself extensively on the wire fence by rubbing its body and head up and down against the wire. This could be a sign of lice. In the summer this could also be suffering from sweet itch. This happens when a horse is bitten by a midge and the horse's immune system recognises foreign proteins and overreacts, similar to hayfever in humans. This leads to release of substances including histamine, which causes itching.



Feeding

Ponies are grazing animals, designed to eat little and often, and they have evolved to eat in 18 out of every 24 hours. They feed on grass in a natural environment, but when kept they are fed hay or hard feeds. They can also eat carrots, but due to having a relatively high sugar content, they should not be fed them too often. People feeding ponies carrots or human food can cause ponies to become addicted to eating human food, and can lead to them being aggressive in the wild with people who do not want to share their food. Human food also gives them bad stomach ache.



Lying down

Ponies lie down to get REM sleep - they can nap while standing but to deeply sleep they need to lie down. They sleep for about two and a half hours in a 24-hour period, in short periods of 15 to 30 minutes at a time. This is an adapted predator-prey response as in the wild it allows fast escape if they are already standing. Horses have a 'stay apparatus' in their legs which means they can relax their leg muscles and sleep without collapsing. They often do this when it is sunny as they find it relaxing. Ponies don't tend to lie down and sleep if they are on their own as there is no one to keep watch and their instincts tell them to watch out for danger. If horses don't lie down, they become sleep deprived after a few days.

Thursday 10 November 2016

Myths of the magpies



Kingdom: Animalia
Family: Corvidae
Species: Pica pica
Magpies are common birds in the UK, and have quadrupled in numbers in the last 35 years. This increase is thought to be due to the amount of carrion from road kills available today, providing a year-round food source. They live in nests of sticks, mud, plant fibre and hair, which are usually situated in trees or bushes and love areas with scattered trees and shrub which include suburban areas. This makes the UEA campus a perfect environment, with plenty of trees and shrubs while still being a suburban area. The magpie builds its home "V" shapes in trees. Forks or V's in nature are symbolic of gateways or paths into the spirit realm and this is meant to ask us about our level of spiritual perception. They rarely travel more than 10 km from where they are born so most magpies born on the university grounds will stay here.



There are many myths and rumours about magpies and I thought I’d do them a favour and sort a few of them out:

1) They steal our jewellery!
Magpies are known for stealing sparkly and shiny objects such as jewellery, which is meant to be symbolic of our tendency to chase after false ideas or perceptions. However, recent research by the University of Exeter has shown that magpies don’t steal shiny objects, and are actually scared of them! This research may lead to a change in the definition of magpies in the Collins English Dictionary for a magpie as a ‘person who hoards small objects’. This may also have wider impacts, such as on the opera ‘La Gazza Ladra’ which is based on a servant girl being held responsible for a series of thefts which were actually committed by a magpie. This is now incorrect, and therefore makes little sense.

2) One for sorrow, two for joy…
Magpies are strongly associated with superstition, and has been since time as early as the sixteenth century, when the popular rhyme was first sung. The song has developed since these times with different numbers being given completely different meanings. There is clearly no truth in it, but it still remains a popular tradition in British culture today. There was once a tradition of raising your hat to a magpie, but as so few people wear hats these days, tradition has died out, although some people do still salute. They are associated with different superstitions in different areas of Britain – in Yorkshire they are associated with evil and you should make a sign of the cross to ward off evil, and in Scotland a single magpie is a sign of impending death!

3) They are responsible for songbird decline.
As we go into winter, the many magpies on the university grounds will be living off a primarily vegetarian diet, whereas in the summer it consists predominantly of ground invertebrates. In the spring, the magpie becomes a major predator as it has to provide for its young and it actually raids other songbirds’ nests and eats their eggs. It is often thought that this may be linked to decline in songbird numbers in the last 25 years, but research by the British Trust for Ornithology has found no evidence that increased numbers of magpies have caused declines in songbirds. It confirms that populations of prey species are not determined by the numbers of their predators, but instead by availability of food and suitable nesting sites are probably the main factors limiting songbird populations.

4) Magpies mate for life.
This is true, but is slightly more complicated than it seems. Magpies have a home territory of around five hectares, and between 25% and 60% of magpies in this area do not breed because nest sites are limited. They therefore form flocks with a home range of up to 20 hectares and then may pair up within the flock.

5) They have huge communal nests.
A typical magpie nest has a roof, and up to two entrances. Their nests are often adopted by long-eared owls. In the winter, these nests are shared by up to 200 magpies as they take part in communal roosting. This allows them to share body heat and decrease the thermoregulatory demands on the individuals within the roost. This is a behaviour also displayed in many other birds such as Jackdaws.


So some of the rumours are true, some of them not. Magpies do eat other birds’ eggs, but this is to feed their young and is not causing decline in songbird numbers. However, most impacts that magpies supposedly have on humans are not true – they don’t give us bad luck and they don’t steal our stuff. So maybe they’re not all that bad.