Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity

Autores
Pietrek, Alejandro G.; Cockle, Kristina L.; Izquierdo, Andrea E.; Berrios, Viviana S.; Lyon, Bruce E.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.
Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.
Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.
Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.
Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.
Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Many habitat-specialist organisms occur in distinct, patchy habitat, yet do not occupy all patches, and an important question is why apparently suitable habitat remains unoccupied. We examined factors influencing patch occupancy in near-threatened, little-known Diademed Plovers (Phegornis mitchellii), arguably the bird most specialized to life in High Andean peatlands. Andean peatlands are well-suited to occupancy modelling because they are discrete patches of humid habitat within a matrix of high-altitude steppe. We hypothesized that Diademed Plovers occupy preferably larger and more humid peatlands, and avoid peatlands used for grazing by llamas and vicuñas, which may trample vegetation and nests. From December 2021 to February 2022 (breeding season), we conducted plover occupancy surveys (2–4) on 40 peatlands at Lagunas de Vilama, a landscape of arid steppe and wetlands above 4,500 m in NW Argentina. We measured peatland size, grazing pressure, topographic and remotely-sensed variables that correlate with humidity, and incorporated these as covariates in occupancy models. Occupancy models showed that more than 50% of the studied peatlands were used by Diademed Plovers and most showed signs of reproduction, highlighting the importance of the Vilama Wetlands for Diademed Plover conservation. Within peatlands, Diademed Plovers were most often associated with headwaters. The top ranked occupancy model included constant detection, random spatial effects, and a single occupancy covariate: mean NDWI (Normalized Difference Water Index, an index correlated with water content and humidity) over the previous three years. Contrary to our prediction, Diademed Plovers preferred less water-saturated peatlands (lower NDWI), possibly to avoid nest flooding. This may be especially important in wet years, like the year when we conducted our surveys. Neither peatland size nor grazing by llamas and vicuñas affected peatland use by Diademed Plovers, suggesting that llama grazing at current levels may be compatible with plover conservation. For organisms that specialize on humid habitats, such as peatlands, factors affecting occupancy may vary temporally with variation in climate, and we recommend follow-up surveys across multi-year timescales to untangle the impact of climate on animals’ use of humid habitats.
info:eu-repo/semantics/publishedVersion
Fil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.
Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.
Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.
Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.
Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.
Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Materia
Phegornis mitchellii (bird)
Reproduction and conservation
Habitat
High Andean peatlands
Lagunas de Vilama
Nivel de accesibilidad
acceso abierto
Condiciones de uso
Repositorio
Repositorio Digital Universitario (UNC)
Institución
Universidad Nacional de Córdoba
OAI Identificador
oai:rdu.unc.edu.ar:11086/553053
Acceder
id RDUUNC_ff94982282649cc51c246fb18edf76ae
oai_identifier_str oai:rdu.unc.edu.ar:11086/553053
network_acronym_str RDUUNC
repository_id_str 2572
network_name_str Repositorio Digital Universitario (UNC)
spelling Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidityPietrek, Alejandro G.Cockle, Kristina L.Izquierdo, Andrea E.Berrios, Viviana S.Lyon, Bruce E.Phegornis mitchellii (bird)Reproduction and conservationHabitatHigh Andean peatlandsLagunas de VilamaFil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.Many habitat-specialist organisms occur in distinct, patchy habitat, yet do not occupy all patches, and an important question is why apparently suitable habitat remains unoccupied. We examined factors influencing patch occupancy in near-threatened, little-known Diademed Plovers (Phegornis mitchellii), arguably the bird most specialized to life in High Andean peatlands. Andean peatlands are well-suited to occupancy modelling because they are discrete patches of humid habitat within a matrix of high-altitude steppe. We hypothesized that Diademed Plovers occupy preferably larger and more humid peatlands, and avoid peatlands used for grazing by llamas and vicuñas, which may trample vegetation and nests. From December 2021 to February 2022 (breeding season), we conducted plover occupancy surveys (2–4) on 40 peatlands at Lagunas de Vilama, a landscape of arid steppe and wetlands above 4,500 m in NW Argentina. We measured peatland size, grazing pressure, topographic and remotely-sensed variables that correlate with humidity, and incorporated these as covariates in occupancy models. Occupancy models showed that more than 50% of the studied peatlands were used by Diademed Plovers and most showed signs of reproduction, highlighting the importance of the Vilama Wetlands for Diademed Plover conservation. Within peatlands, Diademed Plovers were most often associated with headwaters. The top ranked occupancy model included constant detection, random spatial effects, and a single occupancy covariate: mean NDWI (Normalized Difference Water Index, an index correlated with water content and humidity) over the previous three years. Contrary to our prediction, Diademed Plovers preferred less water-saturated peatlands (lower NDWI), possibly to avoid nest flooding. This may be especially important in wet years, like the year when we conducted our surveys. Neither peatland size nor grazing by llamas and vicuñas affected peatland use by Diademed Plovers, suggesting that llama grazing at current levels may be compatible with plover conservation. For organisms that specialize on humid habitats, such as peatlands, factors affecting occupancy may vary temporally with variation in climate, and we recommend follow-up surveys across multi-year timescales to untangle the impact of climate on animals’ use of humid habitats.info:eu-repo/semantics/publishedVersionFil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.https://orcid.org/0000-0002-4783-0680https://orcid.org/0000-0003-0520-32482024-07-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfPietrek AG, Cockle KL, Izquierdo AE, Berrios VS, Lyon BE (2024) Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity. PLoS ONE 19(7): e0305462. https://doi.org/ 10.1371/journal.pone.03054621544-9173http://hdl.handle.net/11086/5530531545-7885https://doi.org/10.1371/journal.pone.0305462enginfo:eu-repo/semantics/openAccessreponame:Repositorio Digital Universitario (UNC)instname:Universidad Nacional de Córdobainstacron:UNC2025-09-29T13:42:07Zoai:rdu.unc.edu.ar:11086/553053Institucionalhttps://rdu.unc.edu.ar/Universidad públicaNo correspondehttp://rdu.unc.edu.ar/oai/snrdoca.unc@gmail.comArgentinaNo correspondeNo correspondeNo correspondeopendoar:25722025-09-29 13:42:07.828Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdobafalse
dc.title.none.fl_str_mv Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
title Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
spellingShingle Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
Pietrek, Alejandro G.
Phegornis mitchellii (bird)
Reproduction and conservation
Habitat
High Andean peatlands
Lagunas de Vilama
title_short Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
title_full Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
title_fullStr Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
title_full_unstemmed Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
title_sort Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity
dc.creator.none.fl_str_mv Pietrek, Alejandro G.
Cockle, Kristina L.
Izquierdo, Andrea E.
Berrios, Viviana S.
Lyon, Bruce E.
author Pietrek, Alejandro G.
author_facet Pietrek, Alejandro G.
Cockle, Kristina L.
Izquierdo, Andrea E.
Berrios, Viviana S.
Lyon, Bruce E.
author_role author
author2 Cockle, Kristina L.
Izquierdo, Andrea E.
Berrios, Viviana S.
Lyon, Bruce E.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv https://orcid.org/0000-0002-4783-0680
https://orcid.org/0000-0003-0520-3248
dc.subject.none.fl_str_mv Phegornis mitchellii (bird)
Reproduction and conservation
Habitat
High Andean peatlands
Lagunas de Vilama
topic Phegornis mitchellii (bird)
Reproduction and conservation
Habitat
High Andean peatlands
Lagunas de Vilama
dc.description.none.fl_txt_mv Fil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.
Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.
Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.
Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.
Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.
Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Many habitat-specialist organisms occur in distinct, patchy habitat, yet do not occupy all patches, and an important question is why apparently suitable habitat remains unoccupied. We examined factors influencing patch occupancy in near-threatened, little-known Diademed Plovers (Phegornis mitchellii), arguably the bird most specialized to life in High Andean peatlands. Andean peatlands are well-suited to occupancy modelling because they are discrete patches of humid habitat within a matrix of high-altitude steppe. We hypothesized that Diademed Plovers occupy preferably larger and more humid peatlands, and avoid peatlands used for grazing by llamas and vicuñas, which may trample vegetation and nests. From December 2021 to February 2022 (breeding season), we conducted plover occupancy surveys (2–4) on 40 peatlands at Lagunas de Vilama, a landscape of arid steppe and wetlands above 4,500 m in NW Argentina. We measured peatland size, grazing pressure, topographic and remotely-sensed variables that correlate with humidity, and incorporated these as covariates in occupancy models. Occupancy models showed that more than 50% of the studied peatlands were used by Diademed Plovers and most showed signs of reproduction, highlighting the importance of the Vilama Wetlands for Diademed Plover conservation. Within peatlands, Diademed Plovers were most often associated with headwaters. The top ranked occupancy model included constant detection, random spatial effects, and a single occupancy covariate: mean NDWI (Normalized Difference Water Index, an index correlated with water content and humidity) over the previous three years. Contrary to our prediction, Diademed Plovers preferred less water-saturated peatlands (lower NDWI), possibly to avoid nest flooding. This may be especially important in wet years, like the year when we conducted our surveys. Neither peatland size nor grazing by llamas and vicuñas affected peatland use by Diademed Plovers, suggesting that llama grazing at current levels may be compatible with plover conservation. For organisms that specialize on humid habitats, such as peatlands, factors affecting occupancy may vary temporally with variation in climate, and we recommend follow-up surveys across multi-year timescales to untangle the impact of climate on animals’ use of humid habitats.
info:eu-repo/semantics/publishedVersion
Fil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Pietrek, Alejandro G. Universidad Nacional de Salta; Argentina.
Fil: Pietrek, Alejandro G. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
Fil: Cockle, Kristina L. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología Subtropical, Puerto Iguazú, Misiones; Argentina.
Fil: Izquierdo, Andrea E. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.
Fil: Izquierdo, Andrea E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.
Fil: Berrios, Viviana S. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina.
Fil: Berrios, Viviana S. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Fil: Lyon, Bruce E. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
Fil: Lyon, Bruce E. Universidad Nacional de Salta; Argentina.
Fil: Lyon, Bruce E. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Bio y Geociencias del NOA; Argentina.
description Fil: Pietrek, Alejandro G. University of California Santa Cruz. Ecology and Evolutionary Biology Department. Santa Cruz, CA; United States of America.
publishDate 2024
dc.date.none.fl_str_mv 2024-07-11
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
status_str publishedVersion
format article
dc.identifier.none.fl_str_mv Pietrek AG, Cockle KL, Izquierdo AE, Berrios VS, Lyon BE (2024) Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity. PLoS ONE 19(7): e0305462. https://doi.org/ 10.1371/journal.pone.0305462
1544-9173
http://hdl.handle.net/11086/553053
1545-7885
https://doi.org/10.1371/journal.pone.0305462
identifier_str_mv Pietrek AG, Cockle KL, Izquierdo AE, Berrios VS, Lyon BE (2024) Habitat occupancy of the threatened Diademed Plover (Phegornis mitchellii) is not affected by llama grazing or peatland size, but declines with peatland humidity. PLoS ONE 19(7): e0305462. https://doi.org/ 10.1371/journal.pone.0305462
1544-9173
1545-7885
url http://hdl.handle.net/11086/553053
https://doi.org/10.1371/journal.pone.0305462
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositorio Digital Universitario (UNC)
instname:Universidad Nacional de Córdoba
instacron:UNC
reponame_str Repositorio Digital Universitario (UNC)
collection Repositorio Digital Universitario (UNC)
instname_str Universidad Nacional de Córdoba
instacron_str UNC
institution UNC
repository.name.fl_str_mv Repositorio Digital Universitario (UNC) - Universidad Nacional de Córdoba
repository.mail.fl_str_mv oca.unc@gmail.com
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