Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems
Background and Aims: Melocactus violaceus an endemic cactus distributed in eastern Brazil, is classified as a vulnerable species in the IUCN Red List due to habitat loss. This research was conducted in two contrasting Brazilian ecosystems, caatinga (Serra de Itabaiana National Park) and restinga (Pi...
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| Materialtyp: | Online |
| Språk: | spa |
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Instituto de Ecología, A.C.
2019
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| Länkar: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1492 |
| _version_ | 1799771356978479104 |
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| author | Larios Ulloa, Mauricio Vinicius Meiado, Marcos Loza Cornejo, Sofía da Conceiҫão Santos, Katiane |
| author_facet | Larios Ulloa, Mauricio Vinicius Meiado, Marcos Loza Cornejo, Sofía da Conceiҫão Santos, Katiane |
| author_sort | Larios Ulloa, Mauricio |
| collection | ABM |
| description | Background and Aims: Melocactus violaceus an endemic cactus distributed in eastern Brazil, is classified as a vulnerable species in the IUCN Red List due to habitat loss. This research was conducted in two contrasting Brazilian ecosystems, caatinga (Serra de Itabaiana National Park) and restinga (Pirambu beach), with the aim of determining the distribution patterns, density, vegetative morphometric characters (height and diameter of the stem) and reproductive characters (presence of cephalium, morphology of flower, fruit and seed) of this subspecies and highlight the possible influence of the habitat on its populations.
Methods: For each of the study areas, patterns of distribution, density, mortality index, morphometric characters of vegetative (height and diameter stem) and reproductive structures (length and diameter of flower, fruit and seed) were analyzed through statistical analyses (ANOVA, Tukey multiple comparison tests and Pearson correlation coefficients).
Key results: The results showed a density of 0.52 and 0.44 individuals/m2 in caatinga and restinga, respectively. More than 65% of individuals establish themselves in vegetation-free patches in both zones. The average values of morphometric characters are within those established for the subspecies, although significant statistical differences were observed (p<0.05) when comparing the two study sites. The Pearson correlation coefficients were significant for the variables fruit length vs. fruit diameter (r=0.9909) and fruit length vs. flower diameter (r=0.9907).
Conclusions: In caatinga, there was a greater density and death rate, whereas a greater percentage of individuals with cephalium was registered in restinga. The registered differences would represent an indication of the probable environmental influence, particularly of microhabitat on some morphometric characters of individuals. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1492 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2019 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-14922022-11-17T22:20:55Z Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems Morfometría y patrones de distribución de Melocactus violaceus subsp. margaritaceus (Cactaceae), en dos ecosistemas contrastantes brasileños Larios Ulloa, Mauricio Vinicius Meiado, Marcos Loza Cornejo, Sofía da Conceiҫão Santos, Katiane Atlantic forest caatinga cactus endemism restinga. caatinga cactácea endemismo Mata Atlântica restinga. Background and Aims: Melocactus violaceus an endemic cactus distributed in eastern Brazil, is classified as a vulnerable species in the IUCN Red List due to habitat loss. This research was conducted in two contrasting Brazilian ecosystems, caatinga (Serra de Itabaiana National Park) and restinga (Pirambu beach), with the aim of determining the distribution patterns, density, vegetative morphometric characters (height and diameter of the stem) and reproductive characters (presence of cephalium, morphology of flower, fruit and seed) of this subspecies and highlight the possible influence of the habitat on its populations. Methods: For each of the study areas, patterns of distribution, density, mortality index, morphometric characters of vegetative (height and diameter stem) and reproductive structures (length and diameter of flower, fruit and seed) were analyzed through statistical analyses (ANOVA, Tukey multiple comparison tests and Pearson correlation coefficients). Key results: The results showed a density of 0.52 and 0.44 individuals/m2 in caatinga and restinga, respectively. More than 65% of individuals establish themselves in vegetation-free patches in both zones. The average values of morphometric characters are within those established for the subspecies, although significant statistical differences were observed (p<0.05) when comparing the two study sites. The Pearson correlation coefficients were significant for the variables fruit length vs. fruit diameter (r=0.9909) and fruit length vs. flower diameter (r=0.9907). Conclusions: In caatinga, there was a greater density and death rate, whereas a greater percentage of individuals with cephalium was registered in restinga. The registered differences would represent an indication of the probable environmental influence, particularly of microhabitat on some morphometric characters of individuals. Antecedentes y Objetivos: Melocactus violaceus una cactácea endémica que se distribuye en el este de Brasil, está categorizada como especie vulnerable en la Lista Roja de la IUCN debido a la pérdida de hábitat. Esta investigación se realizó en dos ecosistemas contrastantes brasileños, caatinga (Parque Nacional Sierra de Itabaiana) y restinga (Playa de Pirambu), con el objetivo de determinar los patrones de distribución, densidad, caracteres morfométricos vegetativos (altura y diámetro del tallo) y reproductivos (presencia de cefalio, morfología de flor, fruto y semilla) de esta subespecie y destacar la posible influencia del hábitat sobre sus poblaciones. Métodos: Para cada una de las áreas de estudio se analizaron y compararon patrones de distribución, densidad, porcentaje de mortalidad y caracteres morfométricos de estructuras vegetativas (altura y diámetro del tallo) y reproductivas (longitud y diámetro de flor, fruto y semilla), mediante análisis estadísticos (ANDEVA, pruebas de comparaciones múltiples de Tukey y coeficientes de correlación de Pearson). Resultados clave: Los resultados demostraron una densidad de 0.52 y 0.44 individuos/m2 en caatinga y restinga, respectivamente. Más de 65% de los individuos se establecen en parches libres de vegetación en ambas zonas. Los valores promedio de caracteres morfométricos están dentro de los establecidos para la subespecie, aunque se observaron diferencias estadísticas significativas (p<0.05) al comparar los dos sitios de estudio. Los coeficientes de correlación de Pearson más altos y significativos fueron para las variables longitud fruto vs. diámetro fruto (r=0.9909) y longitud fruto vs. diámetro flor (r=0.9907). Conclusiones: En caatinga se registró mayor densidad e índice de mortalidad, mientras que un porcentaje mayor de individuos con cefalio fue registrado en restinga. Las diferencias registradas representarían un indicativo de la probable influencia ambiental, particularmente el microhábitat sobre algunos caracteres morfométricos de los individuos. Instituto de Ecología, A.C. 2019-05-09 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf application/epub+zip application/xml https://abm.ojs.inecol.mx/index.php/abm/article/view/1492 10.21829/abm126.2019.1492 Acta Botanica Mexicana; No. 126 (2019) Acta Botanica Mexicana; Núm. 126 (2019) 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1492/4073 https://abm.ojs.inecol.mx/index.php/abm/article/view/1492/4074 https://abm.ojs.inecol.mx/index.php/abm/article/view/1492/1840 Derechos de autor 2018 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Larios Ulloa, Mauricio Vinicius Meiado, Marcos Loza Cornejo, Sofía da Conceiҫão Santos, Katiane Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title | Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title_full | Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title_fullStr | Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title_full_unstemmed | Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title_short | Morphometry and distribution patterns of Melocactus violaceus subsp. margaritaceus (Cactaceae), in two contrasting Brazilian ecosystems |
| title_sort | morphometry and distribution patterns of melocactus violaceus subsp. margaritaceus (cactaceae), in two contrasting brazilian ecosystems |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1492 |
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