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British Summer Time ? ~ by Lewis

British Summer Time ?

We have now switched over to British Summer Time but the weather is still decidedly ‘wintery’.  We have experienced the coldest March in decades, and the coldest end to March in over a hundred years.  Indeed, March has been colder than the preceding winter months. A blackthorn winter if there ever was.  The impact of this weather on wildlife could be far reaching.

Bird populations are likely to suffer – migratory birds are scarce (such as the swallow) and for those that do arrive, there is little food .  There are few insects, beetles, slugs, worms or caterpillars.  The lack of food will also affect resident birds, such as robin and blackbird.   Barn owls are particularly affected by extended winter periods – as they cannot find prey. The breeding season for most birds will probably be reduced , only one brood of young will be possible in a truncated Spring and Summer period. Sea birds have not escaped unscathed - due to storms at sea, there have been increased mortalities of  birds, such as puffins.

frosty-yew-1The extended period of cold temperature will affect the hibernation of mammals such as hedgehogs; they will not have the reserves to see them through the ‘prolonged cold spell’.  The same may apply to certain amphibians.  Though some frogs have laid spawn – sub-zero temperatures and ice formation have killed off the eggs.

However, orchard owners are looking forward to a better harvest than last year.  Last year, the early warmth (20oC in March) encouraged the fruit trees into flower, but the subsequent wet and colder weather meant that pollinators were not active (bumblebees in particular require warm, dry weather) and fruit formation was poor.   The present cold weather means flowering / blossom is delayed and hopefully there will be greater synchrony between flowers and (pollinating) insects.

Posted in: Flora & Fauna ~ On: 31 March, 2013

2 comments so far

Blogs
1 April, 2013

Butterflies have suffered.
CEH / Butterfly Conservation have reported dramatic falls in populations of High Brown fritillary and the Black hairstreak. Even ‘common’ species such as Large Whites and Small Whites (=cabbage whites) did not do well, nor did the Small Tortoiseshell.
http://www.ceh.ac.uk/news/news_archive/UK-butterflies-decade-decline_2011_72.html
http://planetearth.nerc.ac.uk/blogs/post.aspx?id=1037&pid=389

Tony Powell
1 April, 2013

Nature is resilient and the UK climate should eventually settle down into some sort of seasonality. However, the issues you mention are increasing in number, year after year. For many bird species, especially those on farmland, lack the invertebrate food to help them towards a sustainable population. Woodland birds are also suffering, perhaps due to non or mismanagement of these habitats. Last year, largely due to the fact the UK climate was horrendously cold and wet, we saw our Butterfly population reach new lows. With 52 of the 56 species, down in number from the previous cool Summer of 2011. Inevitably, I find that the whole ecosystem is failing, in spite of our greatest efforts, with all the fantastic environmental research and ongoing but dwindling investment. Now has to be the time for global powers to embrace wildlife-friendly environmental practices, rather than go looking for short-term economic pick me ups. Climate change is real and we need to adapt and adapt quickly.

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