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Bylbiau'r Gwanwyn i Ysgolion: Canlyniadau 2005-2015

Penny Dacey, 1 Mehefin 2015

Mae project Bylbiau'r Gwanwyn i Ysgolion yn gyfle i filoedd o wyddonwyr ysgol weithio gydag Amgueddfa Cymru i archwilio newid yn yr hinsawdd a'i ddeall. Ers mis Hydref 2005, mae gwyddonwyr ysgol wedi bod yn cadw cofnod o'r tywydd a phryd mae eu blodau'n agor fel rhan o astudiaeth hirdymor o effeithiau'r tymheredd ar fylbiau'r gwanwyn.

Mae tystysgrifau wedi cael eu hanfon at yr holl ddisgyblion yn 4,596 a gwblhaodd y prosiect eleni. Mae rhagor o fanylion yn adroddiadau Athro'r Ardd: Adroddiad Athro'r Ardd i weld y canlyniadau hyd yn hyn.

  • Gwnewch siartiau amlder a graffiau i ganfod y cymedrau.
  • A wnaeth blodau agor yn hwyr mewn ysgolion oedd yn cofnodi tywydd oer?.
  • Sut wnaeth tymheredd, heulwen a glaw effeithio ar ddyddiadau blodeuo ar gyfartaledd?.
  • Chwiliwch am dueddiadau mewn gwahanol lefydd yng Nghymru..

Hoffwn ddiolch i bob un o'r Gwyddonwyr Gwych a chymrodd ran eleni! Mae ar gyfer prosiect Bylbiau'r Gwanwyn 2015-16.

Ceisiadau yn agored ar gyfer prosiect Bylbiau'r Gwanwyn 2015-16.

Professor Plant www.amgueddfacymru.ac.uk/bylbiau-gwanwyn/

Twitter http://twitter.com/Professor_Plant

Trwy'r Twll Clo yn Kennixton

Bryony Spurway, 22 Mai 2015

Mae'r blog yma'n dilyn blog Marsli Owen.

Pan benderfynom ni wneud digwyddiad o’r enw ‘Trwy’r Twll Clo’ meddyliais am y gwahanol bethau y buaswn yn gallu dangos i bobl yn adeiladau hanesyddol Sain Ffagan. Roeddwn i eisiau rhywbeth oedd yn cysylltu’r gorffennol a’r presennol, felly dewisais hanes yfed te a lleoli fy hun yn y parlwr yn ffermdy Kennixton.

Mae’r parlwr yn Kennixton wedi ei addurno yn steil y 1750au - efallai eich bod yn ei adnabod fel tŷ Capten Blamey oddi ar y gyfres deledu ddiweddar Poldark. Penderfynais fod mewn gwisg ar gyfer y digwyddiad er mwyn ceisio dod a’r tŷ yn fyw, a gosod y bwrdd ar gyfer te fel y buasent nhw wedi gwneud yn y 18fed ganrif.  

Mae gan de hanes gyffroes iawn yn ysbrydoli ffasiynau, ffortiynau, chwyldroadau a throseddau. Daeth i Brydain yn 1657 gyda Catrin o Fracança, gwraig Siarl yr 2il o Bortiwgal. Daeth yn ddiod ffasiynol iawn yn sydyn, ychydig fel y ‘Kate-effect’ heddiw,

Fel llawer o bethau poblogaidd, rhoddwyd treth uchel arno gan y llywodraeth. Roedd rhai delwyr diegwyddor yn ceisio gwneud i’r te fynd ychydig pellach gan ei amhuro gyda dail y ddraenen wen neu hyd yn oed baw defaid! Er mwyn goresgyn y dreth uchel ar de, buasai llawer o bobl yng Nghymru wedi prynu eu te gan smyglwyr. Mae’n bosib y buasai preswylwyr Kennixton wedi cael gafael ar de yn yr un ffordd. Roedd yn wreiddiol wedi ei adeiladu ar arfordir Gŵyr a buasai te wedi ei smyglo wedi bod ar gael yn hawdd. 

NId y Cymry’n unig oedd yn gwrthwynebu talu treth mor uchel ar de; doedd yr Americanwyr ddim yn gweld pam y dylen nhw chwaith. Er mwyn dangos eu teimladau, taflon nhw de Prydeinig i mewn i'r harbwr yn Boston - y Boston Tea Party - gicdaniodd Rhyfel Annibyniaeth America yn 1775.

Carais wneud y digwyddiad yma, a chynhyrchiodd rai sgyrsiau diddorol iawn gydag ymwelwyr. Roedd yn dŷ yn teimlo llawer mwy fel cartref wrth wneud ychydig o weithgareddau dydd i ddydd. Ond mae’n rhaid i mi gyfaddef, mi oeddwn i’n falch iawn o ddod allan o’r ffrog ar ddiwedd y dydd - roedd y sgert fawr a llewys tynn yn gyfyngedig iawn. Gorffennais y dydd yn gwisgo jeans cyfforddus a’n mwynhau paned o de yn dorch ar y sofa!

Bydd blog arall wythnos nesaf gan Heulwen, a fydd yn trafod y Prefab.

Good things come in small packages

Christian Baars, 6 Mai 2015

Why are we concerned with boxes whose lids don’t close properly?

This is not just curators and conservators being pernickety; we really do have very good reasons to make sure that every closed box stays shut.

Museum collections contain a lot of valuable things that are easily perishable. Swords are made to be tough, but - believe it or not - even swords are not indestructible.

Iron rusts when it gets wet. Iron also rusts because of moisture in the atmosphere. Other metals can corrode in much the same way. If we are not careful we would end up with merely a bag of rust!

Therefore, we store all manner of sensitive objects (including cannonballs!) in what we call “micro-environments”. While many of our stores and galleries are air-conditioned, the humidity in the air is often too high to prevent these delicate objects from rusting.

Micro-environments are boxes or plastic pouches that contain one or several objects, plus a chemical that regulates the humidity within the box or pouch. This chemical is silica gel – if you have ever bought an electrical item the packaging probably contained a little sachet saying “Do not eat!”. The little granules in this sachet are silica gel. It is very widely used to keep things dry. Including in museums.

Once we have packaged our objects with silica gel we do not want moisture from the atmosphere to get into the box; that’s why we make sure the box closes properly. Only then will the objects be safe and dry, and ready for display or study.

To read more about our collections care work, go to our Preventive Conservation blog.

Adrian in the Amazon - final part

Adrian Plant, 1 Mai 2015

Our expedition has now drawn to a successful close. Our collections of several thousand specimens have (mostly) been successfully exported from Ecuador and initial analysis of them has started. Entomological expeditions to remote areas are great fun of course. However the less glamorous but harder work comes later, involving months or years of detailed study during which new species are described, evolutionary trees constructed, and ecological or biogeographic conclusions etc. are developed.

In the field there may be great excitement about finding a particular insect but to a scientist, the level of excitement can only grow as the real significance of the finding is revealed subsequently through painstaking study and reference to our already extensive collections. Already we have glimpses of results that might tell us more about how the insect fauna of the upper Amazon Basin came about. For example the unexpected presence of Cladodromia (a classic ‘Gondwanan’ genus) suggests there has been immigration from Patagonia whereas the high diversity of Neoplasta (which is essentially North American) hints at a south-bound migration along the Andes. On the other hand, an almost complete absence of Hemerodromia puzzles us as it is widespread in the lower Amazon so why didn’t we find it higher up? We suspect that the answer may be that it has only recently arrived in South America and is still spreading to Ecuador. Then again the unseasonal rains (due to a strong El Niño this year) may be a factor. Investigations continue.

In the field, our successes were often hard-won; difficult slogging through trying terrain, inclement weather, frustrating officialdom and many other factors sometimes worked against us it seemed, and intermittent access to the internet made writing these blogs challenging at times. We have been very fortunate in that our expedition was entirely and well-funded by the Brazilian Government as a part of their noble and ambitious efforts to understand the biodiversity of the Amazon. Our own exertions will plug one significant hole in knowledge and contribute to greater appreciation of Amazon biodiversity.

To read all of Adrian's entries, go to our Natural History Blog

Adrian in the Amazon - part 9

Adrian Plant, 30 Ebrill 2015

Back to civilization again - the regional capital of Loja, a small town nestled under forested Andean slopes and home to the regional Ministry of Environment where we must go once again, to obtain permission to move the samples we have collected back to Quito.

Unlike our previous brush with officialdom in Tena (our samples from there still have not been released!... but we have some local support to ensure that they eventually will be), the officials in Loja were helpful, polite and efficient! We had allowed 2 days to process the permissions in Loja, but in the event, we received our permits within 30 minutes, leaving us the best part of 2 days to explore the town and sample the local culture and cuisine.

Meanwhile, here are some more photos from our time in the field.

To read more about Adrian's travels, go to our Natural History blog page