Environmental and overgrazing effects on diatom communities in high mountain mires
High mountain mires are affected by anthropogenic activities such as livestock, which have changed land use, fragmented habitats, and affected the structure and functioning of aquatic communities such as diatoms. Diatoms in mires exhibit high diversity, with a significant proportion of rare and thre...
| Autores: | , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/223154 |
| Acceso en línea: | https://hdl.handle.net/2445/223154 http://hdl.handle.net/2445/223154 |
| Access Level: | acceso abierto |
| Palabra clave: | Diatomees Zones humides Pirineus Petjada ecològica Diatoms Wetlands Pyrenees Ecological footprint |
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Environmental and overgrazing effects on diatom communities in high mountain miresGonzalez-Saldias, FernandaPérez Haase, AaronPladevall Izard, EulàliaGomà Martínez, JoanDiatomeesZones humidesPirineusPetjada ecològicaDiatomsWetlandsPyreneesEcological footprintHigh mountain mires are affected by anthropogenic activities such as livestock, which have changed land use, fragmented habitats, and affected the structure and functioning of aquatic communities such as diatoms. Diatoms in mires exhibit high diversity, with a significant proportion of rare and threatened species, making them vulnerable to livestock pressure. Despite their common use as indicators of ecological status, little is known about how overgrazing and trampling affect diatom communities. To assess the impact of livestock pressure, we conducted experiments in six high-mountain mires in the Pyrenees, where livestock exclusion fences were installed. We identified a total of 370 species belonging to 60 genera, with a maximum diversity per site of 77 species. The variables most influencing diatom composition were pH, elevation, Bryophyta cover, water cover, livestock pressure, and mire area. Our results indicated an impact on diatom composition at the two locations with higher livestock pressure; however, we observed no effects on species richness or the Shannon index, suggesting that diatom communities are resistant to livestock pressure. The pH was the most important environmental variable for diatom community composition, demonstrating a positive relationship with diatom richness. Livestock pressure in high mountain mires causes habitat fragmentation and increased dry density of the soil, making diatom communities more vulnerable to environmental changes. However, these communities exhibit notable resistance to significant pressure, with pH emerging as the most critical factor influencing their structure. Our study showed that high livestock pressure affects diatom communities in mires. Considering that a high percentage of diatom species are red-listed as vulnerable or endangered, it is important to protect mires to avoid loss of diversity.Elsevier B.V.2025202520252025info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion8 p.application/pdfapplication/pdfhttps://hdl.handle.net/2445/223154http://hdl.handle.net/2445/223154Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1016/j.scitotenv.2025.178983Science of the Total Environment, 2025, vol. 969https://doi.org/10.1016/j.scitotenv.2025.178983cc-by-nc-nd (c) Elsevier B.V., 2025https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2231542026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| title |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| spellingShingle |
Environmental and overgrazing effects on diatom communities in high mountain mires Gonzalez-Saldias, Fernanda Diatomees Zones humides Pirineus Petjada ecològica Diatoms Wetlands Pyrenees Ecological footprint |
| title_short |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| title_full |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| title_fullStr |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| title_full_unstemmed |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| title_sort |
Environmental and overgrazing effects on diatom communities in high mountain mires |
| dc.creator.none.fl_str_mv |
Gonzalez-Saldias, Fernanda Pérez Haase, Aaron Pladevall Izard, Eulàlia Gomà Martínez, Joan |
| author |
Gonzalez-Saldias, Fernanda |
| author_facet |
Gonzalez-Saldias, Fernanda Pérez Haase, Aaron Pladevall Izard, Eulàlia Gomà Martínez, Joan |
| author_role |
author |
| author2 |
Pérez Haase, Aaron Pladevall Izard, Eulàlia Gomà Martínez, Joan |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Diatomees Zones humides Pirineus Petjada ecològica Diatoms Wetlands Pyrenees Ecological footprint |
| topic |
Diatomees Zones humides Pirineus Petjada ecològica Diatoms Wetlands Pyrenees Ecological footprint |
| description |
High mountain mires are affected by anthropogenic activities such as livestock, which have changed land use, fragmented habitats, and affected the structure and functioning of aquatic communities such as diatoms. Diatoms in mires exhibit high diversity, with a significant proportion of rare and threatened species, making them vulnerable to livestock pressure. Despite their common use as indicators of ecological status, little is known about how overgrazing and trampling affect diatom communities. To assess the impact of livestock pressure, we conducted experiments in six high-mountain mires in the Pyrenees, where livestock exclusion fences were installed. We identified a total of 370 species belonging to 60 genera, with a maximum diversity per site of 77 species. The variables most influencing diatom composition were pH, elevation, Bryophyta cover, water cover, livestock pressure, and mire area. Our results indicated an impact on diatom composition at the two locations with higher livestock pressure; however, we observed no effects on species richness or the Shannon index, suggesting that diatom communities are resistant to livestock pressure. The pH was the most important environmental variable for diatom community composition, demonstrating a positive relationship with diatom richness. Livestock pressure in high mountain mires causes habitat fragmentation and increased dry density of the soil, making diatom communities more vulnerable to environmental changes. However, these communities exhibit notable resistance to significant pressure, with pH emerging as the most critical factor influencing their structure. Our study showed that high livestock pressure affects diatom communities in mires. Considering that a high percentage of diatom species are red-listed as vulnerable or endangered, it is important to protect mires to avoid loss of diversity. |
| publishDate |
2025 |
| dc.date.none.fl_str_mv |
2025 2025 2025 2025 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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https://hdl.handle.net/2445/223154 http://hdl.handle.net/2445/223154 |
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https://hdl.handle.net/2445/223154 http://hdl.handle.net/2445/223154 |
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Inglés |
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Inglés |
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Reproducció del document publicat a: https://doi.org/10.1016/j.scitotenv.2025.178983 Science of the Total Environment, 2025, vol. 969 https://doi.org/10.1016/j.scitotenv.2025.178983 |
| dc.rights.none.fl_str_mv |
cc-by-nc-nd (c) Elsevier B.V., 2025 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess |
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cc-by-nc-nd (c) Elsevier B.V., 2025 https://creativecommons.org/licenses/by/4.0/ |
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openAccess |
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8 p. application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Elsevier B.V. |
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Elsevier B.V. |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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