Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina
Wetland ecosystems have experienced several ecological and hydrological impacts in recent decades determined by human activities and natural disturbances. The Lower Delta of the Paraná River, one of the most important wetland ecosystems of South America, has seen significant losses in both the struc...
| Main Authors: | , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Elsevier
2025
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/22254 https://www.sciencedirect.com/science/article/abs/pii/S2352938524001630 https://doi.org/10.1016/j.rsase.2024.101299 |
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| author | Aquino, Diego Sebastián Schivo, Facundo Gavier Pizarro, Gregorio Ignacio Quintana, Rubén Dario |
| author_browse | Aquino, Diego Sebastián Gavier Pizarro, Gregorio Ignacio Quintana, Rubén Dario Schivo, Facundo |
| author_facet | Aquino, Diego Sebastián Schivo, Facundo Gavier Pizarro, Gregorio Ignacio Quintana, Rubén Dario |
| author_sort | Aquino, Diego Sebastián |
| collection | INTA Digital |
| description | Wetland ecosystems have experienced several ecological and hydrological impacts in recent decades determined by human activities and natural disturbances. The Lower Delta of the Paraná River, one of the most important wetland ecosystems of South America, has seen significant losses in both the structural and functional components of wetland vegetation. These losses promoted not only a widespread conversion of freshwater marshes into grasslands between 1997 and 2013, but also a decline in ecosystem functional diversity between 2001 and 2015. These processes manifested as abrupt shifts in long-term vegetation dynamics, a distorted, transient, spatially heterogeneous relationship with the hydrologic regime, and altered plant communities. However, recent field observations (2015–2023) have partially challenged previous findings and assumptions. Thus, we ask whether previously observed wetland losses are part of a long-term periodic process, rather than a permanent change. To address this question, we studied land use and land cover conversions through an object-based supervised classification of yearly Landsat composites between 1985 and 2023, trained on 935 ground-truth points. To study the spatial and temporal patterns of wetland gain and loss, we implemented an Intensity Analysis (IA), as well as analyses that capture frequency-specific variations and identify significant shifts in linear trends. We produced a total of 39 land cover maps. The IA revealed non-stationarity at all levels of analysis: interval, category, and transition. The study area exhibited resilient patterns through significant and increasingly short-term, periodic dynamics guiding the gain and loss of freshwater marshes. On the opposite, long-term, negative trends depicted an absolute, sustained loss. These contrasting patterns suggest that despite experiencing absolute loss and degradation, wetland ecosystems thrive by exhibiting transient recovery or adaptation mechanisms. Our study unraveled the complexity of wetland ecosystem dynamics, emphasizing how resilience and degradation interplay in the context of land use intensification. |
| format | info:ar-repo/semantics/artículo |
| id | INTA22254 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA222542025-05-13T14:07:29Z Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina Aquino, Diego Sebastián Schivo, Facundo Gavier Pizarro, Gregorio Ignacio Quintana, Rubén Dario Tierras Húmedas Resiliencia Marisma Degradación Ecosistema Wetlands Resilience Marshes Degradation Ecosystems Delta del Río Paraná Wetland ecosystems have experienced several ecological and hydrological impacts in recent decades determined by human activities and natural disturbances. The Lower Delta of the Paraná River, one of the most important wetland ecosystems of South America, has seen significant losses in both the structural and functional components of wetland vegetation. These losses promoted not only a widespread conversion of freshwater marshes into grasslands between 1997 and 2013, but also a decline in ecosystem functional diversity between 2001 and 2015. These processes manifested as abrupt shifts in long-term vegetation dynamics, a distorted, transient, spatially heterogeneous relationship with the hydrologic regime, and altered plant communities. However, recent field observations (2015–2023) have partially challenged previous findings and assumptions. Thus, we ask whether previously observed wetland losses are part of a long-term periodic process, rather than a permanent change. To address this question, we studied land use and land cover conversions through an object-based supervised classification of yearly Landsat composites between 1985 and 2023, trained on 935 ground-truth points. To study the spatial and temporal patterns of wetland gain and loss, we implemented an Intensity Analysis (IA), as well as analyses that capture frequency-specific variations and identify significant shifts in linear trends. We produced a total of 39 land cover maps. The IA revealed non-stationarity at all levels of analysis: interval, category, and transition. The study area exhibited resilient patterns through significant and increasingly short-term, periodic dynamics guiding the gain and loss of freshwater marshes. On the opposite, long-term, negative trends depicted an absolute, sustained loss. These contrasting patterns suggest that despite experiencing absolute loss and degradation, wetland ecosystems thrive by exhibiting transient recovery or adaptation mechanisms. Our study unraveled the complexity of wetland ecosystem dynamics, emphasizing how resilience and degradation interplay in the context of land use intensification. Instituto de Fisiología y Recursos Genéticos Vegetales Fil: Aquino, Diego Sebastián. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina. Fil: Aquino, Diego Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación e Ingeniería Ambiental; Argentina Fil: Aquino, Diego Sebastián. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Schivo, Facundo. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina. Fil: Schivo, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación e Ingeniería Ambiental; Argentina Fil: Schivo, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gavier Pizarro, Gregorio Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Gavier Pizarro, Gregorio Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Fisiología y Recursos Genéticos Vegetales; Argentina Fil: Gavier Pizarro, Gregorio Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Unidad de Estudios Agropecuarios (UDEA); Argentina Fil: Quintana, Ruben Dario. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental; Argentina Fil: Quintana, Ruben Dario. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigación e Ingeniería Ambiental; Argentina Fil: Quintana, Ruben Dario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina 2025-05-13T14:04:59Z 2025-05-13T14:04:59Z 2024-11 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/22254 https://www.sciencedirect.com/science/article/abs/pii/S2352938524001630 2352-9385 https://doi.org/10.1016/j.rsase.2024.101299 eng info:eu-repograntAgreement/INTA/PNNAT-1128052/AR./Desarrollo de herramientas y validación de metodologías para el estudio, gestión y manejo de los sistemas productivos, contribuyendo a su resiliencia socio agroambiental. info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Elsevier Remote Sensing Applications: Society and Environment 36 : 101299. (November 2024) |
| spellingShingle | Tierras Húmedas Resiliencia Marisma Degradación Ecosistema Wetlands Resilience Marshes Degradation Ecosystems Delta del Río Paraná Aquino, Diego Sebastián Schivo, Facundo Gavier Pizarro, Gregorio Ignacio Quintana, Rubén Dario Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title | Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title_full | Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title_fullStr | Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title_full_unstemmed | Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title_short | Unraveling resilience amidst degradation: Recurring loss of freshwater marshes in the Paraná River Delta, Argentina |
| title_sort | unraveling resilience amidst degradation recurring loss of freshwater marshes in the parana river delta argentina |
| topic | Tierras Húmedas Resiliencia Marisma Degradación Ecosistema Wetlands Resilience Marshes Degradation Ecosystems Delta del Río Paraná |
| url | http://hdl.handle.net/20.500.12123/22254 https://www.sciencedirect.com/science/article/abs/pii/S2352938524001630 https://doi.org/10.1016/j.rsase.2024.101299 |
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