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Changing phenologies and climate change

Changing phenologies and climate change

by Chris ~ 16 July, 2019 ~ comments welcome

Phenology is about the observation of natural events, recording when things happen, for example, when horse chestnut and ash trees come into leaf, or when the first swifts or bumblebees are seen. These timings vary from year to year. Through the recording of natural events over many years, one can look for trends and see if they are correlated with changes in the weather or other phenomena. Read more...

Insect Pollinators in decline

Insect Pollinators in decline

by Lewis ~ 13 April, 2019 ~ one comment

The science journal Nature has published the results of another insect survey, specifically of pollinating insects.   The UK pollinator monitoring scheme looked at some 353 species of bees, bumblebees and hoverflies.  The survey analysed 700,000+ sightings of pollinating insects over thirty years or more (1980 to 2013).  The survey yielded information about the changes in the range of these different pollinators - that is the different parts of the countryside that these insects were found in.  The survey did not attempt to determine actual numbers of bees etc in an area.   There were “winners and losers’ in the survey but the overall picture was somewhat depressing. Read more...

The loss of big trees

The loss of big trees

by Chris ~ 10 August, 2018 ~ 2 comments

The world's larger and older trees are dying at in unprecedented numbers, according to Professor David Lindenmayer (Australian National University). One of the first clues to this phenomenon was a Swedish study of their forestry records - dating back some 150 years.  Then an Australian study of (their) Mountain Ash (Eucalyptus regnans) forest confirmed that the bigger and older trees were not only dying in forest fires, but were also dying at a higher rate (than normal) in non-fire years.

There has been a similar loss of large, old pines in the forests of (western) North America - partly through selective logging but also through very severe wild fires.    Read more...

Solid fuels and wood burning stoves,

Solid fuels and wood burning stoves,

by Lewis ~ 30 April, 2018 ~ 3 comments

During the last decade, a market has developed for wood burning stoves. and sales have soared to 200,000 a year.   Wood burning stoves are marketed as ‘eco friendly’, ‘low emission’ and as offering ‘savings on fuel costs’.   Indeed, not only has the woodlands blog written about the pros and cons of different woods in stoves, but Angus has written enthusiastically about the installation of his wood burning stove (it keeps the house warm and reduces carbon emissions).

However, some are beginning to question the wisdom of installing wood stoves.    The market for wood fuel has grown in parallel with the installation of these stoves.   To meet the demand for wood fuel, even some areas of natural woodland have been felled.    For example, mature oaks from Ryton Wood near Coventry were felled to provide fuel for log burning.   Indeed, more wood from British woodland is being burnt now than at any time since the industrial revolution.     Read more...

Woodlands and biodiversity

Woodlands and biodiversity

by Lewis ~ 29 March, 2018 ~ one comment

Most regard woodlands as a beautiful and important part of our countryside, and feel that they can exert a profound and positive influence on our emotional state.    Time spent wandering through the woods can have a relaxing and calming effect. Woodland only forms a small percentage of our countryside (about 13%), and some of that is dominated by conifers planted in the post-war period for timber production; however, the area covered by broad leaved trees is now increasing.    Despite this, our woodlands do harbour a wonderful variety of wildlife (think of the red squirrel, the nightingale, the dormouse) but there is concern that woodland plants and animals face a number of threats - many species are in decline.   Why is this ? Read more...

old forest

Białowieża- “a national treasure for Poland and an international treasure for us all”

by Lewis ~ 19 March, 2017 ~ 2 comments

Białowieża is a forested area that lies on the border of Poland and Belarus.  It includes some 1500 sq km of some of the tallest trees to be found in Europe, including towering hornbeams.  It is a species-rich area, with carnivores such a lynx and wolves, 120 bird species (including the three toed woodpecker and pygmy owl), 60+ mammal species including the bison!  The area has been described as a “national treasure for Poland and an international treasure for us all”.

The tracts of forest are special as they have never been felled, though it would be wrong to think of the woodland as ‘primaeval’  like the original ‘wildwood’. The woodland / forest supports a community through tourism, timber, hunting, honey and mushrooms, not to mention scientific researchers and the staff associated with the National Park.  However, only 105 square km of the forest has been designated as National Park or a Unesco Heritage Site. Read more...

Trees and flood mitigation

Trees and flood mitigation

by Chris ~ 10 March, 2017 ~ comments welcome

With the changing nature of our climate, so extreme events have become more frequent.  The last fifteen or so years has seen significant episodes of flooding.  Flooding used to be a relatively unusual event in the U.K.   In consequence,  efforts are now being directed at finding ways of mitigating the effects of extreme rainfall.

The risk of flooding is associated with changes in our climate (notably rainfall patterns) and the techniques of land management have changed with the mechanisation of agriculture,  the creation of simplified (larger) field systems, land drainage, increased stock densities etc.  The U.K. landscape / countryside has altered significantly over the last fifty years.   Read more...

Woodlands, climate and robustness.

Woodlands, climate and robustness.

by Lewis ~ 13 January, 2017 ~ comments welcome

Climate change is a fact, though not one always accepted by certain politicians.   Greenhouse gas emissions have been growing since the C18th, and particularly in the period 1970 - 2004.   The warming of the world climate system is certain; air and ocean temperatures have increased.  

Though we cannot say how climate will change in any specific area with certainty, we can be sure that extreme weather events will become more common - droughts, heat waves, heavy rainfall, high winds and cyclones. Read more...

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