‘Dedicated Naturalist’: Sessile or pedunculate?

03 Saturday Sep 2016

Posted by sconzani in 'Dedicated Naturalist' Project, nature, trees

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Dr Mary Gillham, Durmast oak, Lowland oak, Mary Gillham Archive Project, Pedunculate Oak, Quercus pedunculata, Quercus petraea, Quercus robur, Quercus sessiliflora, Sessile oak, Upland oak, volunteering

A snippet from my volunteer work on the ‘Dedicated Naturalist’ Project, helping to decipher and digitise, record and publicise the life’s work of naturalist extraordinaire, Dr Mary Gillham. This is an extract from a piece called ‘The British Oak’, written for the Cardiff Naturalists’ Society newsletter, September 1991.

Oak is Britain’s national tree. Hearts of oak were our ships and an oak tree appears on the head of the Cardiff Naturalists’ Society notepaper. Yet how many of us can tell the two native British oaks apart – or even realise that there are two? …

We have the Lowland Oak, [in Wales] predominantly in the Vale of Glamorgan, and the Upland Oak, predominantly on the Coalfield hills. If you live along the South Border Ridges backing Cardiff – Pentyrch or thereabouts – you will have both, and also a wide range of hybrids between, so you may be excused a certain degree of confusion.

Mary Gillham’s 1962 watercolour of a hybrid oak

The Lowland or Pedunculate Oak has stalked acorns and unstalked leaves [as in my photo, left below]. (A peduncle is a flower of fruit talk and the name applies to these.) The ‘proper’ name was formerly a neatly descriptive Quercus pedunculata until some egg-headed boffin decided to change it to Quercus robur, which seems to mean very little.

The Upland, Durmast or Sessile Oak has stalkless acorns, sessile, or sitting directly on the woody twig, and stalks to the leaves, which taper to the base instead of terminating in two ear flaps [as in Mary’s photo, below right]. The ‘proper’ name of this was Quercus sessiliflora until (probably the same) taxonomist changed it to a meaningless Quercus petraea.

These scientists do so like to make things difficult for us. Well, yes, so does Mother Nature. I, too, live on the Border Ridges, so my oaks have stalks to both acorns and leaves. That’s the sort of thing which happens with all this indiscriminate sexual intercourse!

For the full story about the Mary Gillham Archive Project, check out our website, https://marygillhamarchiveproject.wordpress.com/ and follow our progress on Facebook and on Twitter.

Parc Slip Reptile ramble

18 Thursday Aug 2016

Posted by sconzani in 'Dedicated Naturalist' Project, nature, reptiles

≈ 7 Comments

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adder, British reptiles, Common lizard, grass snake, Mary Gillham Archive Project, Parc Slip, Parc Slip Nature Reserve, slow-worm, volunteering, Wildlife Trust, Wildlife Trust for South & West Wales, WTSWW

Partly as a training exercise in wildlife identification, partly as a reward for all our hard work to date, and partly as a fun way for our team to get together, our Mary Gillham Archive Project volunteers were treated to a reptile ramble at Parc Slip Nature Reserve yesterday. And it was fantastic!

160818 reptile ramble (4)

Led by friendly and knowledgeable Wildlife Trust officer Lorna, we explored the research and conservation areas where members of the public don’t normally get to wander. With the excitement palpable and a huge sense of anticipation from us onlookers, Lorna used her trusty snake stick to lift up the reptile refugia (sheets of corrugated iron or heavy plastic under which the reptiles frequently shelter) to see what we could find. Though her initial efforts proved unsuccessful, we did eventually get lucky and were very excited to see one very small, young Common lizard (which scuttled away far too quickly for a photo so my lizard photo here is from another day), a Grass snake (which also slithered away far too quickly to photograph), an Adder and 4 Slow-worms. Success! And a great day out, thanks to the conservation efforts of the wonderful folks who work and volunteer at the Wildlife Trust of South & West Wales.

‘Dedicated Naturalist’: Crafty grey squirrels

02 Tuesday Aug 2016

Posted by sconzani in 'Dedicated Naturalist' Project, animals, nature

≈ 6 Comments

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acorn, acorn weevil, Dr Mary Gillham, grey squirrel, Mary Gillham Archive Project, oak tree

A snippet from my volunteer work on the ‘Dedicated Naturalist’ Project, helping to decipher and digitise, record and publicise the life’s work of naturalist extraordinaire, Dr Mary Gillham. This is an extract from a piece called ‘Oak trees and rabbits helped by those crafty grey squirrels’, written by Mary for the Cardiff Naturalists’ Society newsletter, June 1997:

We hear a lot about the squirrels’ intelligence in overcoming man’s best efforts to deter them from appropriating victuals put out for others. Recent work … has revealed their native wisdom in dealing with more natural foods.

160802 grey squirrel (1)

Many acorns are invaded by weevils, which are as acceptable as squirrel food as is the surrounding nut, but which shorten the life and viability of the fruit. Acorns collected are assessed for longevity by the squirrels, the infected ones eaten and the sound ones buried for another day. This guarantees them a surer food supply for winter and benefits the oak population by giving a higher than average viability of the acorns left to germinate and provide tender shoots for rabbits, rodents and sheep.

The squirrels’ ability … [is] from a high level of intellect evolved to better their own lot and – as part of the general wider plan governing the complex web of nature – to benefit others. Natural mechanisms of behaviour have more repercussions than are at first apparent!