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Protecting our trees and woodlands.

Protecting our trees and woodlands.

by Chris ~ 27 September, 2019 ~ comments welcome

Globalisation is the process by which economies and cultures are drawn together; they become more inter-connected through the flow of trade, capital, people and technology.  This has occurred in part due to the rapid growth of air travel, container shipping etc. so that there are now massive movements of people and goods (both raw and manufactured).   One positive aspect of globalisation is that we have access to foods and materials from all over the world.  A downside is that disease, parasites and pests can ‘hitch a ride’ with people or materials and goods as they move across the world.   Plants and animals can also change their geographical range / distribution as a result of climate change.  The woodlands blog has outlined some of the problems associated with various ‘alien or invasivespecies, for example,

Asian hornets, Read more...

leaves of tree of heaven

Unusual or exotic trees – the tree of heaven

by Lewis ~ 13 December, 2018 ~ comments welcome

The Tree of Heaven or Ailanthus altissima is a species which was introduced to the U.K in 1751 from China.  It arrived in the United States somewhat later, circa 1785 to the Philadelphia area.  It was brought in as an ornamental or exotic tree.  The first introductions were cuttings from male trees.  Ailanthus is a dioecious species, i.e. a tree produces either male or female flowers. So these first trees could not spread or colonise.  However, seeds were then introduced and grown so that there were both male and female trees, and reproduction was possible.

The tree has been grown in gardens, parks and civic settings for many years and is ‘valued’ for its rapid growth, attractive foliage [and colourful, winged fruits]. It flowers and fruits well in hot summers. Read more...

The 'spread' of the grey squirrel.

The ‘spread’ of the grey squirrel.

by Chris ~ 4 January, 2017 ~ comments welcome

DNA profiling has many uses, notably in criminal investigations.  It often allows the identification of a victim, or can 'tie' a suspect to the scene of a crime.  However, it does have other uses.  When applied to animal populations, it can give information as to the origins of the population, the extent of inbreeding / outbreeding etc.  Recently, Dr Lisa Signorile (Imperial College, London) has applied DNA technology to the grey squirrel populations of the U.K. and Italy. Read more...

Fennel, another umbellifer

Fennel, another umbellifer

by Chris ~ 22 January, 2016 ~ comments welcome

There are a number of plants that have ‘fennel’ in their name.   For example, :

  • Dog Fennel : Eupatorium capillifolium
  • Giant Fennel : Ferula communis
  • Fennel, Sweet Fennel : Foeniculum vulgare
  • Florence Fennel : Foeniculum vulgare azoricum
  • Hog's Fennel : Peucedanum officinale
  • Wild Fennel : Nigella arvensis
  • Bronze Fennel : Foeniculum vulgare 'Purpureum'

However, it is the various forms of Foeniculum :-  Fennel, Sweet Fennel or Florence Fennel that are ‘best known’ through their use in cooking and / or the making of absinthe.  Such fennel plants are often garden escapes, but Foeniculum vulgare has naturalised, being particularly associated with disturbed ground. and the banks of streams and rivers.  Read more...

Spraying - herbicide and pesticide application

Spraying – herbicide and pesticide application

by Chris Langford ~ 14 January, 2016 ~ comments welcome

I recently undertook a Knapsack Sprayer PA1 and PA6a (NPTC) 2 day course. The course is aimed at anyone using, or purchasing pesticides, herbicides or fungicides, and applying them with a knapsack sprayer on land. The courses cover the correct preparation of equipment as well as its maintenance, safe operation and calibration. The course was broken down into the following sections:- Read more...

Himalayan Balsam - nemesis is nigh ?

Himalayan Balsam – nemesis is nigh ?

by Chris ~ 26 September, 2014 ~ 8 comments

Himalayan Balsam (or Impatiens glandulifera) is a not unattractive plant; it was introduced as a garden plant to the U.K sometime in the mid-nineteenth century. It is an annual plant and probably the tallest annual in the country - growing to heights of six foot. The flowers are somewhat variable in colour from a striking pink / purple to almost white. The shape has been likened to a policeman's helmet - hence it is sometimes known by that name. It flowers from June right through to October - which is quite late in the year; i.e. still producing seeds long after most other annuals. The black seeds form in capsules - which open explosively when mature, dispersing the seeds. Read more...

Native dominants or botanical 'thugs’ in woodland.

Native dominants or botanical ‘thugs’ in woodland.

by Lewis ~ 28 March, 2014 ~ 2 comments

Much has been written  recent in recent years about the ‘dangers’ posed to our native flora & ecosystems by ‘alien’ invasive species.  Introduced species such Himalayan Balsam (Impatiens glandulifera), Giant Hogweed (Heracleum mantegazzianum), and Rhododendron (Rhododendron ponticum) have been cited as ‘drivers’ of ecosystem change – alongside habitat loss, pollution and over-exploitation.

However, voices have been raised to express concern over certain native species that can grow rapidly producing large amount of biomass (or indeed necromass – think bracken dying down in late autumn) and how they may be impacting on our flora, particularly plants of the woodland herb or field layer.  Read more...

Cats as predators

Cats as predators

by Lewis ~ 14 March, 2014 ~ Comments Off on Cats as predators

Cats have been been 'domesticated' for many thousands of years, and currently stand as the most popular pet in the world (according to Wikipedia).  It has been suggested that the Egyptians were the first to domesticate the wild cat.   Though the association with humans probably pre-dates their domestication, recent research suggests that cats were attracted to ancient farming villages - perhaps by the supply of rodents  (rats / mice).  It is possible that cats are descended from african wildcats that 'self - domesticated' somewhere in the Near East.  A kitten has been found buried alongside human remains in Cyprus; this dates from some nine and half thousand years ago.

However, more recently, the BBC’s Wildlife program focused on domestic cats and wildlife.

Read more...

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