[et_pb_section fb_built=”1″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#F0F0F0″ global_colors_info=”{}”][et_pb_row _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_heading title=”Rhywogaethau estron goresgynnol morol yng Nghymru” _builder_version=”4.27.5″ _module_preset=”default” title_font=”|600|||||||” global_colors_info=”{}”][\/et_pb_heading][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”]<\/p>\n
Isod mae rhai enghreifftiau o rywogaethau estron goresgynnol morol sy\u2019n peri risg i foroedd Cymru. Mae\u2019n hysbys eisoes bod rhai o\u2019r rhywogaethau estron goresgynnol yn <\/span> <\/span><\/span>ac yn bridio yng Nghymru. <\/span><\/span>Nid yw eraill wedi\u2019u cofnodi yng Nghymru ar hyn o bryd ond dylid eu monitro; gelwir y rhain yn \u2018rhywogaethau ar y gorwel\u2019 (wedi\u2019u hamlygu mewn oren) . <\/span><\/span>Mae\u2019n bwysig nodi <\/span><\/span>rhywogaethau a allai fod ar y gorwel fel y gellir rhoi camau bioddiogelwch ar waith i atal eu cyflwyno, neu fel y gellir rhoi rhaglenni monitro ar waith <\/span><\/span>i gynorthwyo <\/span><\/span>canfod ac ymateb yn amserol.<\/span><\/span> <\/span><\/p>\n <\/span><\/span><\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_4,1_4,1_4,1_4″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Cragen blisgyn America” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Ensis-leei-VLIZ-Delva-CC-BY-NC-SA-4.0.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Ensis leei)<\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n <\/span>Pam eu bod nhw’n broblem:<\/span><\/b> <\/span><\/p>\n I gael rhagor o wybodaeth, gweler Porth Gwybodaeth Ysgrifenyddiaeth Rhywogaethau Estron Prydain Fawr<\/a><\/span> ac<\/span> Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol<\/a>.<\/span> <\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Ewin mochyn America” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Slipper-limpet-stack_Chloe-Powell-Jennings.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Crepidula fornicata) <\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n Pam eu bod nhw’n broblem:<\/span><\/b> <\/span><\/p>\n I gael rhagor o wybodaeth, gweler Porth Gwybodaeth Ysgrifenyddiaeth Rhywogaethau Estron Prydain Fawr<\/a><\/span> ac Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol<\/a><\/span>. Mae dolen i\u2019r cynllun gweithredu ar gyfer rhywogaethau i\u2019w chael yma.<\/span> <\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Chwistrell f\u00f4r garped” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Carpet-sea-squirt-Didemnum-vexillum-3-Joe-Ironside.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Didemnum vexillum) <\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n Pam eu bod nhw’n broblem:<\/span><\/b> <\/span><\/p>\n I gael rhagor o wybodaeth, gweler Porth Gwybodaeth Ysgrifenyddiaeth Rhywogaethau Estron Prydain Fawr<\/a><\/span> ac Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol<\/a><\/span>. Mae dolen i\u2019r cynllun gweithredu ar gyfer rhywogaethau i\u2019w chael yma.<\/span> <\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Cranc manegog Tsieina” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Mitten-crab-2_Chester-c-Chloe-Powell-Jennings.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Eriocheir sinensis) <\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n Pam eu bod nhw’n broblem:<\/span><\/b> <\/span><\/p>\n I gael rhagor o wybodaeth, gweler Porth Gwybodaeth Ysgrifenyddiaeth Rhywogaethau Estron Prydain Fawr<\/a><\/span> ac Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol<\/a><\/span>. Mae dolen i\u2019r cynllun gweithredu ar gyfer rhywogaethau i\u2019w chael yma.<\/span> <\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_4,1_4,1_4,1_4″ _builder_version=”4.27.5″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Chwistrell f\u00f4r gwmpawd” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Asterocarpa-J-Bishop.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Asterocarpa humilis) <\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n Pam eu bod nhw’n broblem:<\/span><\/b> <\/span><\/p>\n I gael rhagor o wybodaeth, gweler Porth Gwybodaeth Ysgrifenyddiaeth Rhywogaethau Estron Prydain Fawr<\/a><\/span> ac<\/span> Atlas y Rhwydwaith Bioamrywiaeth Cenedlaethol<\/a>.<\/span> <\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_4″ _builder_version=”4.27.5″ _module_preset=”default” background_color=”#ffffff” custom_padding=”15px|15px|15px|15px|false|false” border_radii=”on|10px|10px|10px|10px” global_colors_info=”{}”][et_pb_blurb title=”Gwymon tafod y cythraul” image=”https:\/\/wildseas.wales\/wp-content\/uploads\/2026\/03\/Grateloupia-turuturu-Chris-Wood-MBA.jpg” module_class=”pa-toggle-blurb” _builder_version=”4.27.5″ _module_preset=”default” header_text_color=”#00080c” header_font_size=”24px” body_font_size=”17px” body_line_height=”1.4em” body_ul_font=”–et_global_body_font|300|||||||” hover_enabled=”0″ custom_css_free_form=”selector .et_pb_main_blurb_image img {|| display: block;|| width: 100% !important;|| height: 200px !important;|| object-fit: cover !important;||}||selector .et_pb_main_blurb_image {|| width: 100%;|| overflow: hidden;||}” global_colors_info=”{}” sticky_enabled=”0″]<\/p>\n (Grateloupia turuturu) <\/em><\/p>\n Sut maent yn ymledu:<\/span><\/b> <\/span><\/p>\n\n
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