{"id":5074,"date":"2026-11-09T22:04:45","date_gmt":"2026-11-09T22:04:45","guid":{"rendered":"https:\/\/www.andex-rhp.org\/?p=5074"},"modified":"2026-11-09T22:04:46","modified_gmt":"2026-11-09T22:04:46","slug":"las-cabeceras-andinas-de-la-patagonia-firmas-quimicas-y-senales-de-cambio-en-un-territorio-en-transformacion","status":"publish","type":"post","link":"https:\/\/www.andex-rhp.org\/?p=5074","title":{"rendered":"Las cabeceras andinas de la Patagonia: firmas qu\u00edmicas y se\u00f1ales de cambio en un territorio en transformaci\u00f3n"},"content":{"rendered":"\n

Roberto Daniel Garcia*; Ignacio Mizerit**; Patricia Elizabeth Garcia*<\/p>\n\n\n\n

Las cuencas de cabecera act\u00faan como corredores ecol\u00f3gicos que conectan las monta\u00f1as con los sistemas acu\u00e1ticos ubicados aguas abajo. Aunque representan la mayor parte de la red fluvial global, estos sistemas suelen estar subrepresentados en las redes de monitoreo biogeoqu\u00edmico. La cantidad de agua es solo una parte de la historia; la materia org\u00e1nica disuelta (MOD) transportada por los arroyos representa uno de los mayores reservorios de carbono en ecosistemas acu\u00e1ticos y constituye una huella de los procesos que ocurren en la cuenca. En los Andes patag\u00f3nicos, los arroyos de cabecera atraviesan paisajes muy diversos. Comprender c\u00f3mo responden estos sistemas es clave para reconocer se\u00f1ales tempranas de transformaci\u00f3n ambiental.<\/p>\n\n\n\n

En este estudio analizamos 29 cuencas de cabecera del noroeste de la Patagonia, ubicadas dentro del Parque Nacional Nahuel Huapi y en el entorno de San Carlos de Bariloche, Dina Huapi y Villa La Angostura, durante los veranos de 2017 y 2024. Se trata de una de las primeras evaluaciones integradas que combina el an\u00e1lisis geomorfol\u00f3gico mediante sistemas de informaci\u00f3n geogr\u00e1fica, mediciones f\u00edsico-qu\u00edmicas y caracterizaci\u00f3n \u00f3ptica de la MOD. Esta aproximaci\u00f3n permiti\u00f3 evaluar c\u00f3mo la forma del relieve, el cambio de uso del suelo y las variaciones clim\u00e1ticas regulan la qu\u00edmica de los arroyos patag\u00f3nicos. <\/p>\n\n\n\n

Las cuencas patag\u00f3nicas presentan una gran diversidad geomorfol\u00f3gica, identificando tres tipos: peque\u00f1as cuencas de alta monta\u00f1a con pendientes pronunciadas, cuencas peque\u00f1as con pendientes moderadas y densidad de drenaje m\u00e1s alta, y cuencas de tama\u00f1o mediano. Estas diferencias se reflejaron en caracter\u00edsticas como la temperatura del agua, la conductividad el\u00e9ctrica y los caudales. Esta diversidad en la forma de las cuencas no se tradujo en diferencias en la composici\u00f3n de la MOD. En todos los arroyos predomin\u00f3 una se\u00f1al de origen terrestre, asociada con materiales h\u00famicos provenientes de los suelos y la vegetaci\u00f3n, con un aporte m\u00ednimo de producci\u00f3n aut\u00f3ctona.<\/p>\n\n\n\n

Al comparar los registros entre 2017 y 2024 se observ\u00f3 un aumento en la temperatura del agua y una reducci\u00f3n marcada en los caudales, alineado con las tendencias regionales de menor precipitaci\u00f3n y calentamiento. A la par, se registr\u00f3 una ca\u00edda cercana al 50% en los compuestos org\u00e1nicos m\u00e1s complejos (materiales arom\u00e1ticos y derivados de la lignina), mientras que la concentraci\u00f3n de carbono org\u00e1nico disuelto se mantuvo estable. Esto sugiere que la menor conectividad h\u00eddrica entre los suelos y los arroyos est\u00e1 alterando la calidad y estructura del carbono que llega a los arroyos. Finalmente, los efectos del desarrollo urbano en las cuencas mostraron se\u00f1ales sutiles pero detectables. Un aumento en los \u00edndices de materia org\u00e1nica reciente en arroyos con cierta cobertura urbana advierte sobre las primeras alteraciones en estos ecosistemas. <\/p>\n\n\n\n

Comprender c\u00f3mo la forma de la tierra, la vegetaci\u00f3n y el clima se traducen en la firma qu\u00edmica de las cuencas de cabeceras es esencial. Al establecer datos de referencia en sistemas pr\u00edstinos, este estudio aporta una base cr\u00edtica para el monitoreo futuro y para comprender la vulnerabilidad de los ecosistemas de monta\u00f1a frente al cambio clim\u00e1tico y el desarrollo urbano. <\/p>\n\n\n\n

\"Extra\u00eddo
Extra\u00eddo de Garcia, R. D., I. Mizerit, and P. E. Garcia (2026)<\/figcaption><\/figure>\n\n\n\n
\n\n\n\n

Garcia,\u00a0R. D.,\u00a0\u00a0I. Mizerit, and\u00a0\u00a0P. E. Garcia. 2026. \u201cAn Integrated Assessment of Dissolved Organic Matter and Catchment Characteristics in Northern Patagonian Headwater Streams.\u201d\u00a0Hydrological Processes<\/em>40, no. 6: e70599.\u00a0https:\/\/doi.org\/10.1002\/hyp.70599<\/a>.<\/p>\n\n\n\n

\n\n\n\n

*Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA, CONICET\u2013UNComahue), San Carlos de Bariloche, R\u00edo Negro, Argentina<\/p>\n\n\n\n

**Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio (IIDYPCA, CONICET\u2013UNRN), San Carlos de Bariloche, R\u00edo Negro, Argentina\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

Roberto Daniel Garcia*; Ignacio Mizerit**; Patricia Elizabeth Garcia* Las cuencas de cabecera act\u00faan como corredores ecol\u00f3gicos que conectan las monta\u00f1as con los sistemas acu\u00e1ticos ubicados aguas abajo. Aunque representan la mayor parte de la red fluvial global, estos sistemas suelen estar subrepresentados en las redes de monitoreo biogeoqu\u00edmico. La cantidad de agua es solo una […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_front_end_style_editor":"no","ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[16],"tags":[235,206,229],"class_list":["post-5074","post","type-post","status-publish","format-standard","hentry","category-lecturas","tag-corredor-ecologico","tag-cuencas","tag-patagonia","entry"],"yoast_head":"\nLas cabeceras andinas de la Patagonia: firmas qu\u00edmicas y se\u00f1ales de cambio en un territorio en transformaci\u00f3n - Programa Hidroclim\u00e1tico Regional para los Andes<\/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:\/\/www.andex-rhp.org\/?p=5074\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Las cabeceras andinas de la Patagonia: firmas qu\u00edmicas y se\u00f1ales de cambio en un territorio en transformaci\u00f3n - Programa Hidroclim\u00e1tico Regional para los Andes\" \/>\n<meta property=\"og:description\" content=\"Roberto Daniel Garcia*; Ignacio Mizerit**; Patricia Elizabeth Garcia* Las cuencas de cabecera act\u00faan como corredores ecol\u00f3gicos que conectan las monta\u00f1as con los sistemas acu\u00e1ticos ubicados aguas abajo. 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