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Ionawr 2015

Newid yn y tymhorau

Postiwyd gan Penny Tomkins ar 30 Ionawr 2015

Ddaear ar ei echel (gan wefan BBC Bitesize)

Helo Gyfeillion y Gwanwyn,

Diolch i bawb wnaeth yrru data tywydd ata i'r wythnos ddiwethaf. Yn enwedig y rhai ohonoch wnaeth yrru jôcs – daliwch ati, mae nhw’n gwneud i mi chwerthin!

Roedd rhai o sylwadau’r wythnos yma yn dweud bod y tymheredd yn codi a’r dyddiau’n mynd yn hirach, sy’n esgus perffaith i mi siarad rhywfaint am y tymhorau!

Mae yna bedwar tymor mewn blwyddyn: gaeaf, gwanwyn, haf a hydref. Mae hi’n dal yn aeaf ar hyn o bryd, y tymor oeraf.

Mae’r gwanwyn yn dechrau o gwmpas Mawrth yr 20fed (Cyhydnos y Gwanwyn) a dyma’r tymor lle bydd y rhan fwyaf o blanhigion yn blodeuo ac anifeiliaid bach yn cael eu geni wrth i’r tywydd gynhesu. Mae ŵyn bach yn y caeau yn arwydd da bod y gwanwyn wedi cyrraedd!

O fis Mehefin tan fis Medi bydd hi’n haf – y dyddiau’n hir a’r tywydd yn gynnes. Yn lwcus i chi, byddwch yn cael gwyliau hir o’r ysgol!

Bydd yr hydref yn gafael o ddiwedd Medi ymlaen – y dyddiau yn byrhau, y tywydd yn oeri, a’r dail yn troi’n oren, coch a brown cyn syrthio o’r coed. Daw’r gaeaf unwaith eto ym mis Rhagfyr a bydd yn aros efo ni tan ganol Mawrth.

Ydych chi’n gwybod pam ein bod yn cael tymhorau? Beth sy’n achosi i’r tywydd newid mor ddramatig yn ystod y flwyddyn? Mae’n digwydd achos bod y Ddaear yn troi o amgylch yr Haul ar ongl. Mae’r llun isod yn dangos y Ddaear a’r Haul. Mae’r Ddaear yn cylchdroi ar echel (dychmygwch linell yn cysylltu Pegwn y Gogledd â Phegwn y De) wrth symud o amgylch yr Haul.

Mae’n cymryd 365 diwrnod i’r Ddaear deithio unwaith o amgylch yr Haul. Hyd blwyddyn ar blaned yw’r amser mae’n gymryd i deithio o amgylch ei seren unwaith. Felly mae blwyddyn ar y Ddaear yn para 365 diwrnod.

Y Tymhorau (gan wefan BBC Bitesize)

Mae’r llun uchod yn dangos llwybr y Ddaear o amgylch yr Haul. Yr echel yw’r llinell goch trwy’r ddau begwn. Mae’r echel ar ongl wahanol i lwybr y Ddaear o amgylch yr Haul (y llinell wen doredig). Mae hyn yn golygu ein bod ar ongl fymryn yn wahanol i’r Haul bob dydd. Dyma sy’n achosi’r newid yn hyd y dydd. Mae dyddiau byrrach (gaeaf) yn golygu llai o olau a llai o wres, sy’n gwneud y gaeaf yn oerach. Mae dyddiau hirach (haf) yn golygu mwy o olau a gwres, sy’n ei gwneud yn gynhesach!

Mae’r DU yn ‘Hemisffer y Gogledd’ sy’n golygu ein bod yn nes at Begwn y Gogledd nag at Begwn y De. Yn y llun, mae Pegwn y Gogledd (y llinell goch sy’n pwyntio am i fyny) yn gwyro i gyfeiriad yr Haul ym mis Mehefin ac oddi wrth yr Haul ym mis Rhagfyr. Yr ongl hon sy’n achosi’r newid yn hyd y dyddiau wrth i’r Ddaear droi o amgylch yr Haul.

Mae gwledydd eraill yn profi’r newidiadau hyn ar wahanol adegau. Yn Awstralia mae’n haf ym mis Rhagfyr! Ac yng Ngwlad yr Iâ mae’n olau dydd am ddyddiau ar y tro yn yr haf, ac yn dywyll am ddyddiau yn y gaeaf... dychmygwch yr Haul yn tywynnu am hanner nos!

Daliwch ati Gyfeillion y Gwanwyn,

Athro’r Ardd

A non-biologist’s perspective

Postiwyd gan Teresa Darbyshire ar 30 Ionawr 2015

Here is the last in this series of blogs from the Falkland Islands, for now. An account of the trip by husband Brendan:

A non-biologist’s perspective on fieldwork and worm hunting

I remember having a conversation with my careers advisor when I was 16 about my A-Level choices, at the time I was really interested in Sharks and wanted to be a Marine Biologist. My ‘careers advisor’ then cheerfully informed me that to achieve this goal I would need to continue my Chemistry studies, at which point my heart sank and my visions of playing with Great Whites became distant fantasies.  

My interest in the underwater world never really left me but I also never really got to understand what being a Marine Biologist would actually entail.  This trip in many ways has been an eye opener as it has provided me with an insight into what it is actually like to pursue Marine Biology and the level of dedication required.

My first lesson in advanced rock pooling began at a place called Rincon Grande in the north of the Falkland Islands.  The excitement I felt as I started picking my way through the pools and looking under rocks and actually being more successful than Teresa in finding a range of worms, including my first scale worm quickly led to stoic perseverance as I then went on to find a succession of ragworms for what felt like hours.  There was at least one stage when I wished we were looking for starfish as these seemed to be everywhere but were apparently not of interest.

One of the key things that Teresa was trying to do was identify the diversity of worms in any location and that meant trying to find as much as possible and ideally a sample of more than one of each.  In many of the locations we went to, this meant spending 2 or 3 hours persistently combing the rocks and digging through what sediment there was to try and find as much as possible in the short window the tides provided us with (photo 1).  This tried both of our patience on several occasions as travel in the Falklands over what is considered roads, which we would consider simply a pot holed gravel drive, means that you arrive feeling battered and bruised before you then spend a couple of hours crouched on a beach in weather that seemed to vary from one extreme to another hunting an, at times, elusive prey.

Whilst collecting on a beach where you can stand on something solid whilst holding a piece of rock in one hand and using the forceps in your other hand to pick off a worm that might be only a few millimeters long is challenging. Trying to do this underwater, whilst you have one hand on the rock to try and steady yourself against the rolling ground swell that is trying to alternately tangle you in the kelp or pound you against the rock that you are trying to prize a sample off with the dive knife that you are holding in your other hand is a different matter altogether (photos 2 & 3)! The really challenging thing was that after you had managed to prize the sample off the rock you need to get it into a plastic sample bag (ziplock freezer bag) without losing everything – apparently I failed in this respect. Whilst I can’t hide the fact that the trowel and the all important brass snap lock (yes she has mentioned it more than once) did get left behind my argument is still that the sample was more important and that was recovered! I also never realised just how difficult it could be to open, put something into and then reseal a zip lock bag whilst wearing neoprene gloves that are 5mm thick!

Whilst the beach sampling and the diving both presented challenges the rewards do come when you get to view your catch down the microscope. What on the beach looks like a small orange blob is transformed into an elegant looking worm with a flowing mane of orange hair (a cirratulid – photo 4).  If you’re really lucky you get rewarded with a scale worm, resplendent in its glistening armour (photo 5), if you’re unlucky, well it’s just another ragworm…..

All in all whilst ‘rock pooling for adults’ may not be entirely accurate, I have to admire the persistence and knowledge required to do what I dreamed of doing as a young man in Leeds.

Sea Lion Island

Postiwyd gan Teresa Darbyshire ar 29 Ionawr 2015

26-28.01.15

For the last 2 days, we have been out on Sea Lion Island, the southern-most outpost of all of the islands. Once again, we ended up on a flight that landed over an hour after low tide, even though the tide was at 4pm! This was very frustrating but we were straight out as soon as we could, and down on the nearest patch of shoreline to see what we could do. My trusty trowel had been replaced with a coal shovel, the best I could manage at short notice but it would have to do. Although the shore was the kind I knew would be poor for worms (favoured by penguins) we had a go. No luck. At the end of the bay were some rock ledges with a few rock pools with some sand and algae not yet being affected by the rising tide. We suddenly started finding a (very) few worms under the sand in the pools and then I also noticed some small casts as well (see photo 1). This spurred us on to keep looking and at least come away with something (photo 2). We eventually ended up with a small pot that turned out to be slightly more diverse than expected with at least four different species represented (not bad for a fairly bare rock pool and only just over a dozen animals). The most common animal in the pot was an animal known as Boccardia, which is very hardy and often found in the higher shore environments here (photo 3).

The following day dawned windy and wet and the tide was not until nearly 5pm. This gave us plenty of time to peruse the island, see the sights and check out the coastline as the island is only around 5 miles long. I had been here before a few years ago and had already sampled some of the rocky shores on the south side so was more interested in trying to get something from the northern coasts. Shortly after we set off the rain started, although not too heavily. On one of the first shores we visited we found a male sea lion (photo 4), fast asleep. A fantastic sight and one I had not seen before so that improved our mildly damp spirits. By lunchtime, the rain had become persistent and not so light anymore. Our waterproofs were holding out but both pairs of feet were increasingly squelchy. As we turned to follow the north coast back up the island, we found ourselves heading into the wind. Suddenly life felt a little unfair. Most of the shores we had seen were either inaccessible below vertical cliffs, clean boulders in equally clean mobile sand with no life beneath or solid rock ledges, scoured clean by sea and weather. We eventually fought our way back to the bay we had started at the night before, but this time a couple of hours before low tide to find it being pounded by waves. We dug a few holes but there was nothing apparent. After a brief sit down to stare vacantly at the shore while being eyed up by an obviously nesting pair of caracaras who just as obviously didn’t want us there, we decided to head directly across the island to the opposite, sheltered shore and try there instead. We then walked the length of the shore, digging small holes every so often like itinerant squirrels, as the tide slowly ebbed out. Still nothing. We crossed back to the other shore and walked the length of that too, just to say we tried. Salvation came in the form of washed up kelp bladders that were encrusted with the small coiled tubes of spirorbid worms that were still alive (photo 5). We finally allowed ourselves to retire to the lodge, peel off our boots and wring out our socks.

Today was even windier and I have to admit the will and strength to fight my way through it had gone. Our flight back after lunch was short with an even shorter take-off and landing thanks to the wind. Tomorrow I have to pack all of my samples up and make sure they are ready for sending home before doing the same for myself.

Brendan is tasked with the job of finishing off the blog for you, giving a non-biologist’s view of fieldwork and worms and the delights of getting involved with both for the first time. Then it’s an early start on Friday before the long haul home.

A Window into the Industry Collections - January 2015

Postiwyd gan Mark Etheridge ar 29 Ionawr 2015

The New Year has seen a number of interesting objects enter the industry collections.

This teddy bear was manufactured by Wendy Boston (Crickhowell) Ltd. The company was founded in 1941 in Crickhowell (near Abergavenny) by husband and wife Wendy and Ken Williams. They had moved from Birmingham during the Blitz, and Wendy started making toys for friends and family whilst her husband was away. This bear was purchased circa 1963/64 for the donor when he was a baby, and living in Llanelli. It wears a home knitted cardigan, and the donor as a young child had a matching larger version. We also have in the collections a poodle pyjama/nightdress case manufactured by the same company. However, teddy bears were the dominant and by far the best know product and so we are fortunate to have been donated an example with a good Welsh provenance.

My last month’s Blog featured a Lesbians & Gaymen Support the Miners fund badge from 1985. This ‘Pits and Perverts’ t-shirt compliments this, and was manufactured to promote the film ‘Pride’ (it has ‘In Cinemas 12th September’ printed on the back). The film tells the amazing true story of how a group of gay men and women raised funds to help families affected by the miners’ strike.


Towards the end of last year we were donated this First World War memorial plaque. It commemorates men who had worked at Guest Keen & Nettlefold's Rogerstone Steel Works and the adjacent HP Wire Nail Works. The plaque is currently on display, until 15th March 2015, in the exhibition ‘Working for Victory’ at the National Waterfront Museum, Swansea (see photograph below).

Finally these two metal plates were recovered from Cardiff Docks in the 1990s. They both come from an early 20th century crane manufactured by John Williams & Sons (Cardiff) Ltd. at Globe Foundry, Cardiff for use in the docks. These are an important pair of makers’ plates, as we only have a small number of plates from Welsh-manufactured machinery. They also complement a set of foundry tools from this company and an electric battery delivery truck used by the company for local deliveries.


Mark Etheridge
Curator: Industry & Transport
Follow us on Twitter - @IndustryACNMW

Leafhopper identification

Postiwyd gan Mike Wilson ar 28 Ionawr 2015

Saad Metwali is visiting the museum for a few months. He is an Egyptian studying in Saudi Arabia at King Saud University, Riyadh towards a Masters thesis on leafhopper taxonomy. He is spending time in Natural Sciences working with Dr Mike Wilson on leafhopper identification and taxonomy. This is his first time outside of the Middle East - it might have been better to come in the summer! He has carried out fieldwork in the mountains of SW Arabia and found many species not previously known in Arabia. Our insect collections at National Museum Cardiff are important for the study of this region.

Natural Talent Apprenticeship Scheme

Postiwyd gan Mike Wilson ar 28 Ionawr 2015

Liam Olds has joined the Department of Natural Sciences for a year as part of the Natural Talent apprenticeship scheme. This scheme is now funded by the Esmée Fairbairn Foundation, and has operated in Scotland for some years and been successful in training people in identification skills associated with wildlife and conservation.  The scheme has now widened to the rest of the UK and six apprenticeships have started this year. Liam will be working with us on Colliery Spoil Invertebrates and learning how to survey and identify a wide range of species that might be found on these iconic Welsh habitats, as well as working with others who are interested in preserving some of these sites.

@Dyddiadur Kate – “Tywydd mawr iawn”

Postiwyd gan Richard Edwards ar 28 Ionawr 2015

Un o’r ychydig luniau o dywydd garw yn Archif Sain Ffagan. Dyma Fferm Blaen-cwm, ger Boncath, yn ystod eira mawr 1963.

Tudalen o ddyddiadur Kate, 10 - 16 Ionawr 1915. Sylwer ar y cyfeiriadau at y "tywydd pur arw."

Rhoddir llawer o sylw i’r tywydd yn wythnosau cyntaf @DyddiadurKate. Cymysgedd o law ac eira trwm sy’n disgyn yn ardal y Sarnau yn Ionawr 1915 – tywydd nodweddiadol ar gyfer yr amser yma o’r flwyddyn.

7 Ionawr: Tywydd mawr iawn. Disgwyl Mr + Mrs Hughes Parc yma ond yn ormod tywydd. Ein tri yn mynd ir Cyf. Gweddi. Pwyllgor "Cymdeithas y Tarw" ar ol y Cyf. Gweddi. Mam a finnau yn galw yn Penffordd wrth ddod adref.

Difyr yw gweld nad oedd y tywydd garw yn atal pobl rhag mynychu’r capel!

Mewn erthygl ym mhapur newydd Baner Ac Amserau Cymru ar 16 Ionawr 1915 fe ddywedir mai “Rhagolygon pur annaddawol sydd i’r tywydd yn ystod y pedwar mis cyntaf…”

Felly, fel Kate, edrychwn ymlaen at y gwanwyn!

Os hoffech ddarganfod mwy am hanes y tywydd yn eich ardal, cymerwch bip ar y ‘Tywyddiadur’ sydd i’w gweld ar wefan Prosiect Llen Natur.

Paddleworms and Trowels

Postiwyd gan Teresa Darbyshire ar 26 Ionawr 2015

24.01.15

Today was packed full. Brendan managed to get a dive in before we had to head down to Walker Creek for an afternoon tide. The shore dive went from near Gypsy Cove, not far out of Stanley and involved a short off-road drive to the shore before the divers had to pick their way down across the rocks to get into the water (photo 1). Apparently visibility was reasonable at around 6m and Brendan’s present to me this time consisted of a bag of sand and a couple of bags of ‘stuff’ scraped off the rocks. Unfortunately, Brendan found his way into my bad books by admitting to have lost my ‘dive trowel’. This tool has been great for sediment sampling while diving, as well as shore sampling when not possible to take a spade. Admittedly, the trowel was a cheap plastic one, however the not so cheap brass clip attached to it was another matter!

After the dive, we headed straight off to Walker Creek, which was a 2.5 hour drive south, almost to the opposite end of the island. The shore turned out to be another hard-ish one (photo 2), which was a little disappointing at first, but the collecting turned out to be quite productive. We found some very large orbiniid worms (20-30 cm in length) and an area where there were abundant scaleworms, under more than two thirds of the stones turned over. With the drive back a long and bumpy one, we stopped after an hour so that I could sort through and ‘fix’ (with formaldehyde) the worms and label pots. I have learnt in the past that worms do not enjoy long, bumpy car journeys and break up (particularly more fragile specimens) by the journey end if this is not done.

25.01.15

No shore sampling was planned for today, however, Brendan has managed to get out on 2 different shore dives while I sorted through previous samples, changed formaldehyde to alcohol (a better, less toxic, long term preservative but not as good for the initial fixation) and generally caught up on fieldwork and specimen notes. At lunchtime, the divers returned bearing gifts (even without a trowel). The dive had been on a local Phragmatopoma reef. This is a type of marine bristle worm called a sabellariid (photo 3) that builds hard tubes of sand and can create a reef-like environment around itself. In the UK, other worms of the same family create reefs both on and offshore and are known as ‘honeycomb worms’ due to the appearance of the reef they create. Many other species often inhabit these reefs as well. I was presented with some examples of the reef, some scrapings from rocks and a very large, green paddleworm (photo 4: Eulalia magalhaensis) over 20 cm in length. Another two species of paddleworm, not yet identified, were also found within the samples. These often-colourful worms are very photogenic and I managed to get some good photos of these as well (photos 5 & 6). All in all, a successful day, even without any shore sampling. Loss of the trowel was forgiven!

@DyddiadurKate – Willie Jones a’r “hen elyn marwol”

Postiwyd gan Elen Phillips ar 26 Ionawr 2015
Blwch casglu gyda label papur gyda'r geiriau 'Crusade Against Consumption' arno. Er budd Cymdeithas Goffa Genedlaethol y Brenin Edward VII, Gorffennaf 1914.

Blwch casglu er budd ymgyrch 'Crusade Against Consumption' Cymdeithas Goffa Genedlaethol y Brenin Edward VII, Gorffennaf 1914.

 

 

Blwch casglu er budd ymgyrch 'Crusade Against Consumption' Cymdeithas Goffa Genedlaethol y Brenin Edward VII, Gorffennaf 1914.

Yn ei dyddiadur ddoe, soniodd Kate am farwolaeth gwr ifanc o Landderfel:

25 Ionawr 1915 – Diwrnod braf iawn. Marwolaeth Willie Jones Llandderfel yn 35 oed. Bob Price yma min nos. David Roberts Pentre ag Humphrey Davies yma min nos.

Yn ei harddull arferol, dyw Kate ddim yn ymhelaethu am farwolaeth Willie Jones. Ond gyda diolch i adnoddau digidol gwych y Llyfrgell Genedlaethol, gallwn wneud hynny heddiw. Cyhoeddwyd ysgrif goffa i Willie Jones yn Baner Ac Amserau Cymru ar 6 Chwefror 1915. O’r erthygl hon, cawn wybod iddo farw o’r diciâu – un Cymro ymysg y 41,800 a fu farw o’r haint yng Nghymru a Lloegr yn y flwyddyn honno.

“Wele un etto o feibion Cymru wedi disgyn i’r bedd yn gynnar trwy yr hen elyn marwol, y darfodedigaeth. Cafodd bob gofalaeth a allasai cyfeillion a pherthynasau eu hestyn iddo. Bu am ysbaid mewn ‘Sanatorium’ ac i bob golwg dynol gallesid meddwl ei fod wedi troi ar wella, ond amser byr a fu cyn dechrau diboeni drachefn.”

Roedd y diciâu yn ofid mawr yng Nghymru ar ddechrau’r 20fed ganrif, ac ar gynnydd yn ystod y Rhyfel Byd Cyntaf. Penderfynodd yr Aelod Seneddol David Davies – Yr Arglwydd Davies o Landinam yn ddiweddarach – bod angen “crwsâd” yn erbyn yr haint. I’r diben hwn, yn 1910 sefydlwyd Cymdeithas Goffa Genedlaethol Cymru (Edward VII Welsh National Memorial Association), gyda Davies yn llywydd arni. Gallwch ddarllen mwy am hanes y Gymdeithas ar wefan Archifau Cymru.

Yma yn Sain Ffagan, mae blwch yn y casgliad a ddefnyddwyd yng Ngorffennaf 1914 i gasglu arian er budd y Gymdeithas. O’i amgylch mae’r adysgrif The King Edward VII Welsh National Memorial Association – Crusade againt Consumption – No Change – 21 July 1914, 22 July 1914, 23 July 1914.

merched y sied

Postiwyd gan Bernice Parker ar 23 Ionawr 2015

Mae’r defaid beichiog yn dod mewn o’r caeau'n syth ar ôl y Nadolig er mwyn cael lloches, bwyd a gofal ychwanegol – sy’n bwysig ar gyfer datblygiad yr wyn. Wnaethon nhw gael eu sganio yn y flwyddyn newydd er mwyn eu gwahanu i ddau grwp: y rhai sydd yn disgwyl oen sengl, a’r lleill sydd yn disgwyl gefeilliad neu dripledi. Mae’r marciau glas ar eu cefnau nhw yn dangos i’r ffermwyr pwy sy’n mynd i gael beth.


Ar hyn o bryd mae gennym tua 100 o ddefaid magu felly dyn ni’n disgwyl 150+ o wyn. Mae ein defaid 2 blwydd oed yn wyna am y tro cyntaf. Mae dafad yn feichiog am 5 mis - mae’n dod i’w thymor ym mis Medi, wedyn mae’r hyrddod yn mynd mewn gyda'r merched ar y cyntaf o Hydref. Felly bydd wyna yn cychwyn dechrau mis Mawrth. Ni sy’n dewis y drefn yma er mwyn cael wyn i'w gweld yng nghaeau'r Amgueddfa dros y Pasg. Dros yr wythnosau nesaf mi fydden nhw’n cicio eu sodlau yn y sied, yn bwyta ac yn cysgu…

Yn torheulo ac yn cael eu maldodi.

Rhywle yn eu phlith nhw mae Poopsie, oen llywaeth o ddwy flynedd yn ol. Mi gafodd yr enw ar ol iddi wneud pw-pw drostai wrth i mi fwydo hi!

Weithiau mae wyn llywaeth yn aros yn ddof ond mae Poopsie wedi ail ymuno a’r ddiadell erbyn hyn. Ond jyst weithiau mae na rhyw edrychiad sy’n dal fy sylw a dwi’n tybio ‘A ti di Poopsie…..?

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