{"id":10039,"date":"2026-01-22T08:18:19","date_gmt":"2026-01-22T08:18:19","guid":{"rendered":"https:\/\/afonyddcymru.cambrianweb.dev\/?p=10039"},"modified":"2026-10-17T22:44:47","modified_gmt":"2026-10-17T21:44:47","slug":"asesiad-newydd","status":"publish","type":"post","link":"https:\/\/afonyddcymru.cambrianweb.dev\/cy\/asesiad-newydd\/","title":{"rendered":"Asesiad Newydd o Gyflwr Rhywogaethau a Chynefinoedd Cymru"},"content":{"rendered":"

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Mae adroddiad diweddaraf Cyfoeth Naturiol Cymru yn rhoi gwell dealltwriaeth inni o gyflwr gwael amgylchedd naturiol Cymru, gan gynnwys ei hafonydd.<\/span><\/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>

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Dydd Iau 22 Ionawr 2026<\/strong><\/h2><\/div>\n\t\t\t<\/div>
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Mae Cyfoeth Naturiol Cymru heddiw wedi cyhoeddi\u2019r asesiad cyntaf ar lefel gwlad o amgylcheddau daearol, d?r croyw a morol Cymru.<\/p>\n

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Yn cwmpasu\u2019r cyfnod 2019\u20132024 ac wedi\u2019i gynhyrchu o dan Reoliad 9A o Reoliadau Cadwraeth Cynefinoedd a Rhywogaethau 2017, mae\u2019r asesiad yn rhoi gwell dealltwriaeth inni o gyflwr gwael amgylchedd naturiol Cymru, gan gynnwys ei hafonydd.<\/p>\n

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Dylid llongyfarch y rheoleiddiwr am gynhyrchu adroddiad sy\u2019n glir, yn gryno, wedi\u2019i ysgrifennu\u2019n dda ac wedi\u2019i gyflwyno\u2019n broffesiynol.<\/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>

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Rhagor o Newyddion Drwg i\u2019n Hafonydd<\/h3><\/div>\n\t\t\t<\/div>
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Fel y gellid disgwyl, mae\u2019r asesiad yn peri pryder mawr ar gyfer cynefinoedd a rhywogaethau d?r croyw Cymru. Ac i bysgod yn arbennig, nid yw\u2019r adroddiad hwn yn cynnig unrhyw ryddhad o\u2019r asesiadau digalon a wnaed eisoes ar boblogaethau eog a sewin Cymru.<\/p>\n

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O\u2019r naw poblogaeth o rywogaethau pysgod a aseswyd (lampreys m\u00f4r, afon a nant; si\u00e2d allis a thwaite; eog yr Iwerydd; grugieir d?r, gwyniaid [Gwyniad] a phenwaig), roedd pob un mewn cyflwr anfafriol, gyda thair yn cael eu dosbarthu fel \u201cdrwg\u201d.<\/p>\n

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Ni wnaeth rhywogaethau dyfrol eraill wneud yn well. Cafodd cregyn perl d?r croyw a chrancod d?r croyw crafangau gwynion eu dosbarthu fel anfafriol\/drwg, a\u2019r llysiau\u2019r afon fel anfafriol\/annigonol.<\/p>\n

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Yr unig rywogaethau d?r croyw a aseswyd a gafodd eu dosbarthu fel ffafriol oedd dyfrgwn a brogaod cyffredin.<\/p>\n

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Ac o\u2019r chwe chynefin d?r croyw a aseswyd, roedd pedwar yn anfafriol\/drwg ac un yn anfafriol\/annigonol. Dim ond un a gafwyd mewn statws da.<\/p><\/div>\n\t\t\t<\/div>

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Pwysau ar Rhywogaethau a Chynefinoedd D?r Croyw<\/h3><\/div>\n\t\t\t<\/div>
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Yn ogystal \u00e2 chyflwr, edrychodd yr asesiad hefyd ar y pwysau sy\u2019n effeithio ar y rhywogaethau a\u2019r cynefinoedd hyn. Ac roedd yn amlwg pa sector oedd fwyaf amlwg yn hyn o beth.<\/p>\n

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Canfuwyd mai amaethyddiaeth oedd y pwysau a adroddwyd amlaf ar rywogaethau. O ran pwysau a raddiwyd yn uchel ac yn ganolig, roedd arferion amaethyddol yn effeithio ar 44 o\u2019r 53 o rywogaethau a aseswyd.<\/p>\n

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Yn benodol ar gyfer pysgod, roedd amaethyddiaeth yn bwysau a raddiwyd yn uchel ar gyfer chwech o\u2019r naw rhywogaeth.<\/p><\/div>\n\t\t\t<\/div>

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Roedd coedwigaeth a newid hinsawdd hefyd yn bwysau mawr, gan effeithio ar 29 a 26 o rywogaethau yn y drefn honno pan gyfuniwyd pwysau a raddiwyd yn uchel ac yn ganolig.<\/p>\n

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Roedd arferion sy\u2019n gysylltiedig ag amaethyddiaeth hefyd yn bwysau mawr ar gynefinoedd. Fe wnaethant effeithio ar 52 o\u2019r 61 o gynefinoedd a aseswyd pan gyfuniwyd pwysau a raddiwyd yn uchel ac yn ganolig. Roedd pwysau amaethyddol a raddiwyd yn uchel yn effeithio ar bump o\u2019r chwe chynefin d?r croyw a aseswyd.<\/p><\/div>\n\t\t\t<\/div>\n\t\t\t<\/div>

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Roedd grugieir d?r (Thymallus thymallus<\/em>) ymhlith y rhywogaethau pysgod a gafodd eu dosbarthu fel anfafriol\/annigonol. Fodd bynnag, mae Cyfoeth Naturiol Cymru wedi barnu bod y poblogaethau yng Nghymru (Dyfrdwy, Hafren a Gwy) yn sefydlog.<\/strong><\/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>

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A yw\u2019r Mesurau i Leihau Effaith Amaethyddiaeth ar Afonydd yn Llwyddo<\/h3><\/div>\n\t\t\t<\/div>
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Er bod amaethyddiaeth wedi\u2019i nodi fel pwysau mawr, y sector hwn hefyd oedd yn gyfrifol am y nifer fwyaf o fesurau cadwraeth ar gyfer rhywogaethau a chynefinoedd.<\/p>\n

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Mae hyn yn codi cwestiwn: a yw\u2019r mesurau a weithredwyd i fynd i\u2019r afael ag effeithiau\u2019r sector ffermio ar gynefinoedd d?r croyw Cymru yn effeithiol? Ac a yw\u2019r gofynion cyfreithiol i sicrhau diogelu Ardaloedd Cadwraeth Arbennig yn cael eu bodloni? Byddai\u2019r dystiolaeth yn yr asesiad hwn yn awgrymu nad ydynt.<\/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>

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Statws Cadwraeth Cyffredinol Rhywogaethau nad ydynt yn Awyrennol yng Nghymru, heb gynnwys rhywogaethau morol (Adrodd 2019\u20132024). Ffynhonnell: CNC<\/strong><\/p><\/div>\n\t\t\t<\/div>\n\t\t\t<\/div>

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Statws Cadwraeth Cyffredinol Rhywogaethau yng Nghymru yn \u00f4l Gr?p Rhywogaeth, heb gynnwys rhywogaethau morol (Adrodd 2019\u20132024). Ffynhonnell: CNC<\/strong><\/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>

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Seithfed Uwchgynhadledd yr Afonydd<\/h3><\/div>\n\t\t\t<\/div>
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Gyda\u2019r Seithfed Uwchgynhadledd Afonydd Llywodraeth Cymru yn cael ei chynnal heddiw, mae\u2019r adroddiad yn atgoffa Llywodraeth Cymru a Cyfoeth Naturiol Cymru o\u2019r angen i fynd i\u2019r afael \u00e2\u2019r sector sydd, ar gyfer y rhan fwyaf o afonydd yng Nghymru, yn cael yr effaith andwyol fwyaf.<\/p>\n

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Mae mentrau ar y gweill. Mae\u2019r rheoliadau ar reoli llygredd amaethyddol yn cael eu gwella ac mae\u2019r rheoleiddiwr wedi hogi ei orfodaeth. Daw\u2019r Cynllun Ffermio Cynaliadwy i rym eleni (er bod amheuon ynghylch faint o effaith a gaiff hyn ar lygredd d?r), mae deddfwriaeth newydd yn cael ei chyflwyno i osod targedau llygredd d?r ac mae rheoleiddiwr d?r newydd i Gymru ar y ffordd.<\/p>\n

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A fydd hyn yn ddigon i wella\u2019r sefyllfa ar gyfer rhywogaethau a chynefinoedd Cymru? Y prawf, wrth gwrs, fydd a ellir cyflawni statws ffafriol erbyn yr asesiad nesaf. Y ffactor arall fydd a yw cyfran gymharol y sector amaethyddol o\u2019r pwysau ar rywogaethau a chynefinoedd yn lleihau o\u2019r lefelau pryderus a nodwyd yn yr adroddiad hwn.<\/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>

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Dolenni:<\/strong><\/p>\n

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Habitats Regulations Summary Report for the reporting period 2019-2024<\/a>
Wales. Natural Resources Wales, January 2026.<\/a><\/p><\/div>\n\t\t\t<\/div>

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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>

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\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>
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Mae adroddiad diweddaraf Cyfoeth Naturiol Cymru yn rhoi gwell dealltwriaeth inni o gyflwr gwael amgylchedd naturiol Cymru….<\/p>\n","protected":false},"author":3,"featured_media":10044,"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":[61],"tags":[],"class_list":["post-10039","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-newyddion"],"yoast_head":"\nAsesiad Newydd o Gyflwr Rhywogaethau a Chynefinoedd Cymru - Afonydd Cymru<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/afonyddcymru.cambrianweb.dev\/assessment-species-habitats\/\" \/>\n<meta property=\"og:locale\" content=\"cy_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Asesiad Newydd o Gyflwr Rhywogaethau a Chynefinoedd Cymru - 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