{"id":9386,"date":"2025-08-12T15:13:25","date_gmt":"2025-08-12T14:13:25","guid":{"rendered":"https:\/\/afonyddcymru.cambrianweb.dev\/?p=9386"},"modified":"2026-10-17T22:44:35","modified_gmt":"2026-10-17T21:44:35","slug":"cymorth-astudio-phd","status":"publish","type":"post","link":"https:\/\/afonyddcymru.cambrianweb.dev\/cy\/cymorth-astudio-phd\/","title":{"rendered":"Cymorth Astudio PhD"},"content":{"rendered":"<p><div class=\"et_d4_element et_pb_section et_pb_section_0  et_pb_css_mix_blend_mode et_section_regular et_block_section\" >\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_d4_element et_pb_row et_pb_row_0  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_4_4 et_pb_column et_pb_column_0  et_pb_css_mix_blend_mode et-last-child et_block_column\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_0  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p>Mae Afonydd Cymru yn noddi dau PhD y bydd eu canfyddiadau yn helpu i reoli afonydd Cymru yn y dyfodol.<\/p>\n<p>Dechreuodd y cyntaf yn 2024 ac mae\u2019n defnyddio DNA amgylcheddol (eDNA) i nodweddu\u2019r berthynas rhwng dosbarthiad llygryddion a newidiadau mewn bioamrywiaeth yn afon El\u00e1i.<\/p>\n<p>Mae\u2019r astudiaeth yn defnyddio samplau d?r i edrych ar amrywiaeth planhigion, anifeiliaid a bacteria mewn ystod o safleoedd rhwng tarddle\u2019r afonydd hyn a Bae Caerdydd. Mae\u2019r samplau hyn hefyd yn cael eu dadansoddi i ganfod mathau o lygredd a\u2019u maint.<\/p>\n<p>Ynghyd \u00e2 Cyfoeth Naturiol Cymru, Llywodraeth Cymru a Trust Afonydd De Ddwyrain Cymru, rydym hefyd yn cefnogi PhD a fydd yn edrych ar ffyrdd o oresgyn yr heriau sy\u2019n gysylltiedig \u00e2 mesur halogiad cemegol mewn systemau d?r croyw ac yn gwerthuso risgiau newydd.<\/p>\n<p>Hyd yma, mae rhai cemegion mewn afonydd wedi bod yn anodd eu mesur, er gwaethaf eu gwenwyndra. Mae ymdrechion monitro wedi cynnwys samplu pysgod marw, a laddwyd yn benodol ar gyfer y rhaglen. Mae dulliau eraill wedi cynnwys defnyddio cyrff ysglyfaethwyr (yn aml dyfrgwn a laddwyd ar y ffyrdd), er bod y dull hwn \u00e2 chyfyngiadau amlwg.<\/p>\n<p>Felly, gallai defnyddio samplwyr goddefol i fesur bygythiadau cemegol gynnig manteision sylweddol, ond nid yw dulliau effeithiol wedi\u2019u sefydlu eto yng nghyd-destun afonydd a\u2019r amgylchedd d?r croyw. Trwy ddefnyddio samplu d?r gweithredol a goddefol, samplu gweithredol o organeddau byw, a meinweoedd dyfrgwn sydd wedi\u2019u cadw mewn banc bio, bydd yr astudiaeth hon yn gwerthuso cryfderau a chyfyngiadau\u2019r dulliau hyn.<\/p><\/div>\n\t\t\t<\/div><div class=\"et_pb_module et_d4_element et_pb_text et_pb_text_1  et_pb_text_align_left et_pb_bg_layout_light\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_pb_text_inner\"><p>Postio:<\/p><\/div>\n\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_section et_pb_section_1  et_pb_css_mix_blend_mode et_section_regular et_block_section\" >\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<div class=\"et_d4_element et_pb_row et_pb_row_1  et_pb_css_mix_blend_mode et_block_row\">\n\t\t\t\t<div class=\"et_d4_element et_pb_column_2_5 et_pb_column et_pb_column_1  et_pb_css_mix_blend_mode et_block_column et_pb_column_empty\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><div class=\"et_d4_element et_pb_column_3_5 et_pb_column et_pb_column_2  et_pb_css_mix_blend_mode et-last-child et_block_column et_pb_column_empty\">\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gan ddechrau ym mis Medi 2025, bydd Afonydd Cymru yn cefnogi dau astudiaeth PhD sy\u2019n edrych ar lygredd, bioamrywiaeth, a sut i fonitro bygythiadau cemegol sy\u2019n dod i\u2019r amlwg er mwyn helpu gyda rheolaeth afonydd yn y dyfodol&#8230;.<\/p>\n","protected":false},"author":3,"featured_media":9391,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[69],"tags":[],"class_list":["post-9386","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-projects-cy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - 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