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Facts about badgers, a Woodlands TV film

Facts about badgers, a Woodlands TV film

by The blog at woodlands.co.uk, 15 October, 2024, 0 comments

The badger (strictly speaking the european badger) arrived in this country,  like everything else, as the ice retreated some thousands of years ago.  It is our largest land predator, others such as the wolf are no longer with us - though some would support their reintroduction as part of rewilding programs. Whilst badgers are predators, they are, in fact, omnivores - eating both plant and animal material.  Much of their diet is earthworms, though they are not averse to small mammals such as mice, rats and hedgehogs!  Whilst badgers tend to make their home (setts) in woodlands, they will travel to open fields and pastures in search of food, digging for grubs [for example, chafer larvae]. A badger sett is a complex, extensive engineering feat accomplished by using their powerful front limbs and claws.  They dig down and then drag the earth out of the tunnels by moving backwards with the soil under their chin and then deposit it in a ‘spoil heap’.   The presence of a spoil heap is a good indication of a badger sett in your woodland.   If a colony is well established there will be a main sett, but also an ‘annex sett', and possibly even smaller setts away from the main sett.  Recently Woodland TV filmed Adrian Coward from the Somerset Badger Group, who explains in details the nature and relationship of these setts and how badgers recognise their ‘family members’ and how they mark their territory.  They move around their territory along well defined paths. [embed]https://youtu.be/vv3CK1hVM2o?si=_TmpkcXhKoxqy24A[/embed] Whilst we know a lot about how badgers move through their home territories, little was known about any long distance movements. To investigate such movements, scientists set up a study in County Kilkenny (Ireland).  It was one of the largest badger studies of its type,  The study spanned a large area and some four years ,and 'followed' some 900+ badgers.  They found that whilst most badgers only moved 2 to 3 kilometres from their sett, some travelled 7.5 km and the longest distance travelled by a badger was 22 km.  If animals can move around and meet with other populations, this can promote outbreeding. Learning about these 'lengthier' movements may be a useful contribution in the discussion of badgers and bovine tuberculosis - which is also discussed in the Woodlands TV film ‘Facts about badgers’, and the topic has featured in other woodland blogs. Curious fact : The French call a wet shaving brush blaireau or “badger", because quality brushes use badger hair. Apart from viewing Woodlands TV on this site, it may also be viewed on YouTube : www.youtube.com/@WOODLANDSTV 82K subscribers 482 videos 15,896,142 views Joined 9 Jul 2008 United Kingdom
A problem with plastic. 

A problem with plastic. 

by The blog at woodlands.co.uk, 21 April, 2022, 3 comments

In the C19th, many objects were made from ivory.  The ivory came from the slaughter of elephants.  As elephant populations fell, so the search for a suitable substitute began.   Celluloid was one of the first materials used but it was easily combustible. It was soon replaced by other materials like Bakelite,  this was the first entirely synthetic plastic.  It was made from phenol and formaldehyde.  It was used for toys, radios, telephones etc.   Bakelite  was tough, heat resistant and  did not conduct electricity.  Other materials followed, and many different plastics are produced today; for example, polyethylene (which is widely used in product packaging) and polyvinyl chloride [PVC] (which is used in construction and pipes because of its strength and durability).  The trouble is that plastics are just so useful.  Plastics are cheap, lightweight and durable.  Durability is a good quality when the plastic is being used but not when it is discarded, for example, into landfill where it may take centuries to degrade.  Sadly, many consumers leave empty bottles / containers / wrappers in the streets, on the beach, at picnic sites etc.  As most plastics are made from fossil fuels / oil, the manufacture of plastic is also a driver of climate change. Since the middle of the twentieth century, it is estimated that some 8.3 billion tonnes of plastic has been produced. Sadly much of this has ended up in landfill, in rivers, the soil, and the oceans - with significant effects of wildlife. Plastic pollution is ubiquitous. For example, the Great Pacific Garbage Patch, which is a collection of large areas of plastic and other debris in the North Pacific Ocean. It has been estimated that it contains some 1.8 trillion pieces of plastic .  It is a serious threat to marine life such as whales, sea turtles, fish, and birds.  Plastic items are discarded with little thought to the consequences.  Bottles etc can end up as traps for many animals and a few years back we (at woodlands) found a child’s plastic boat dumped in a woodland (see featured image above).  Sometimes, we see the distorted remains of plastic tree guards ‘strangling’ young trees. Plastic carrier bags (sometimes filled with dog faeces)  can end ups suspended from trees / shrubs in woodland, or caught on wire fencing, waving n the wind. Discarded plastic items come in all shapes and sizes; those that are 5mm or smaller are termed “microplastics.”  Microplastics come in part from larger plastic pieces that degrade into smaller pieces; but also from microbeads.  Microbeads are very small pieces of polyethylene plastic that are added to health and beauty products, such as some skin cleansers and toothpastes. Now microplastics are to be found everywhere from deep oceans, to Arctic snow and Antarctic ice.  They are found in foodstuffs and drinking water.  One investigation found that if parents prepare baby formula by shaking it up in hot water inside a plastic bottle, their child might swallow tens of thousands of these microplastic particles each day.  The movement of these particles through ecosystems is  graphically summarised in this article.   There is currently much discussion and research about how these microplastics will impact on the environment and different organisms, including us.  Because they are so small and to be found widely in the environment,  they enter organisms and food chains.  Apart from the plastic in these particles, they may also contain chemical residues of  plasticisers, drugs, and pharmaceuticals, and heavy metals may stick to them.  Sometimes, sewage sludge may be used as fertiliser and this can contain nanoplastics.   Also, treated wastewater is used for irrigation  purposes and this again may be a source of plastic.  Research indicates that earthworms in microplastic ‘enriched’ plant litter grow more slowly and have a shorter life span, and there is evidence that the gut of earthworms becomes inflamed after exposure to microplastics.   Earthworms are important in aerating the soil and transporting materials such as dead leaves from the surface to deeper in the soil, they also 'inadvertently' transport micro-plastics.  Springtails, a group of soil micro-arthropods (Collembola) can also help move micro-plastics in the soil.  The movement of microplastics through the soil makes these materials ‘accessible’ to other soil dwellers but it is not clear if they pass along food chains (as has been the case with pesticides). Whether nano-plastics are taken up by or affect plants - again is not yet clear.  However, the chemicals released by plastics such as phthalates may taken up by plants. There is a significant risk of physical and physiological damage to organisms and ecosystems by these micro-plastics *. The particles also get into the human body and the consequences for our health are, as yet,  unknown. further information on nanoparticles etc : https://www.sciencedaily.com/releases/2022/04/220420133533.htm