Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.flora.2021.151962 http://hdl.handle.net/11449/229884 |
Resumo: | Fire is one of the most important factors driving community assembly and ecosystem functioning in tropical savannas. However, few studies have evaluated the physiological responses of ground layer plant communities to fire disturbance. Here we used different fire regimes to investigate possible changes in leaf maximum gas exchange (Amax and gs) and leaf nutritional content (N, P, K, Ca and Mg) among different plant growth forms in savanna ground layer communities. We compared responses of ground layer plant communities under two different fire regimes: (1) no recent fire occurrence; and (2) two recurrent fire events in the last 20 years. We estimated canopy cover, soil chemical properties and species abundance on burned and unburned plots in order to calculate abundance-weighted species average trait values for gas exchange and leaf nutrient content. We found that burned plots exhibited lower canopy cover and soil organic matter content, and an overall higher soil macronutrients availability compared to unburned plots. These environmental differences clearly influenced the ground layer plant communities, which depicted higher Amax and gs in burned areas regardless of growth form. We found no significant differences among leaf nutrient traits, except for a lower Mg concentration in the burned site species. Our results support the hypothesis that distinct fire regimes select for a different set of leaf functional traits, with fire occurrence acting as an important driver increasing the maximum photosynthetic rate on the ground layer. While nutrient use seems not to be affected by medium-term recurrent fires, physiological plasticity on carbon and water use processes in response to changes in resource availability can promote the persistence of savanna species under frequent fire. |
id |
UNSP_51e129dfe5cd75bdcdf1ed01cda4ac5d |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/229884 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire eventsCerradoFire frequencyHerbaceous plantsPhotosynthesisSpecific leaf areaFire is one of the most important factors driving community assembly and ecosystem functioning in tropical savannas. However, few studies have evaluated the physiological responses of ground layer plant communities to fire disturbance. Here we used different fire regimes to investigate possible changes in leaf maximum gas exchange (Amax and gs) and leaf nutritional content (N, P, K, Ca and Mg) among different plant growth forms in savanna ground layer communities. We compared responses of ground layer plant communities under two different fire regimes: (1) no recent fire occurrence; and (2) two recurrent fire events in the last 20 years. We estimated canopy cover, soil chemical properties and species abundance on burned and unburned plots in order to calculate abundance-weighted species average trait values for gas exchange and leaf nutrient content. We found that burned plots exhibited lower canopy cover and soil organic matter content, and an overall higher soil macronutrients availability compared to unburned plots. These environmental differences clearly influenced the ground layer plant communities, which depicted higher Amax and gs in burned areas regardless of growth form. We found no significant differences among leaf nutrient traits, except for a lower Mg concentration in the burned site species. Our results support the hypothesis that distinct fire regimes select for a different set of leaf functional traits, with fire occurrence acting as an important driver increasing the maximum photosynthetic rate on the ground layer. While nutrient use seems not to be affected by medium-term recurrent fires, physiological plasticity on carbon and water use processes in response to changes in resource availability can promote the persistence of savanna species under frequent fire.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Programa de Pós-Graduação em Ecologia e Conservação Universidade Federal do ParanáDepartamento de Biologia Faculdade de Ciências Agrárias e Veterinárias Univ. Estadual Paulista Campus de Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, Vila IndustrialDepartamento de Biologia Faculdade de Ciências Agrárias e Veterinárias Univ. Estadual Paulista Campus de Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, Vila IndustrialUniversidade Federal do Paraná (UFPR)Universidade Estadual Paulista (UNESP)Scalon, Marina CorrêaRossatto, Davi Rodrigo [UNESP]2022-04-29T08:36:22Z2022-04-29T08:36:22Z2021-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.flora.2021.151962Flora: Morphology, Distribution, Functional Ecology of Plants, v. 285.0367-2530http://hdl.handle.net/11449/22988410.1016/j.flora.2021.1519622-s2.0-85119053989Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFlora: Morphology, Distribution, Functional Ecology of Plantsinfo:eu-repo/semantics/openAccess2024-06-06T13:04:44Zoai:repositorio.unesp.br:11449/229884Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-06T13:04:44Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
title |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
spellingShingle |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events Scalon, Marina Corrêa Cerrado Fire frequency Herbaceous plants Photosynthesis Specific leaf area |
title_short |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
title_full |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
title_fullStr |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
title_full_unstemmed |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
title_sort |
Ground layer Cerrado plants sustain higher maximum photosynthetic rates after medium-term fire events |
author |
Scalon, Marina Corrêa |
author_facet |
Scalon, Marina Corrêa Rossatto, Davi Rodrigo [UNESP] |
author_role |
author |
author2 |
Rossatto, Davi Rodrigo [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Federal do Paraná (UFPR) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Scalon, Marina Corrêa Rossatto, Davi Rodrigo [UNESP] |
dc.subject.por.fl_str_mv |
Cerrado Fire frequency Herbaceous plants Photosynthesis Specific leaf area |
topic |
Cerrado Fire frequency Herbaceous plants Photosynthesis Specific leaf area |
description |
Fire is one of the most important factors driving community assembly and ecosystem functioning in tropical savannas. However, few studies have evaluated the physiological responses of ground layer plant communities to fire disturbance. Here we used different fire regimes to investigate possible changes in leaf maximum gas exchange (Amax and gs) and leaf nutritional content (N, P, K, Ca and Mg) among different plant growth forms in savanna ground layer communities. We compared responses of ground layer plant communities under two different fire regimes: (1) no recent fire occurrence; and (2) two recurrent fire events in the last 20 years. We estimated canopy cover, soil chemical properties and species abundance on burned and unburned plots in order to calculate abundance-weighted species average trait values for gas exchange and leaf nutrient content. We found that burned plots exhibited lower canopy cover and soil organic matter content, and an overall higher soil macronutrients availability compared to unburned plots. These environmental differences clearly influenced the ground layer plant communities, which depicted higher Amax and gs in burned areas regardless of growth form. We found no significant differences among leaf nutrient traits, except for a lower Mg concentration in the burned site species. Our results support the hypothesis that distinct fire regimes select for a different set of leaf functional traits, with fire occurrence acting as an important driver increasing the maximum photosynthetic rate on the ground layer. While nutrient use seems not to be affected by medium-term recurrent fires, physiological plasticity on carbon and water use processes in response to changes in resource availability can promote the persistence of savanna species under frequent fire. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-01 2022-04-29T08:36:22Z 2022-04-29T08:36:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.flora.2021.151962 Flora: Morphology, Distribution, Functional Ecology of Plants, v. 285. 0367-2530 http://hdl.handle.net/11449/229884 10.1016/j.flora.2021.151962 2-s2.0-85119053989 |
url |
http://dx.doi.org/10.1016/j.flora.2021.151962 http://hdl.handle.net/11449/229884 |
identifier_str_mv |
Flora: Morphology, Distribution, Functional Ecology of Plants, v. 285. 0367-2530 10.1016/j.flora.2021.151962 2-s2.0-85119053989 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Flora: Morphology, Distribution, Functional Ecology of Plants |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803045338159775744 |