Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy
Background and Aims: Temperate forests suffer continuous deforestation and other anthropogenic disturbances. Additionally, some types of forest management, such as secondary vegetation removal ("chaponeo"), can be another disturbance that negatively affects the values of some environmental...
| Autores principales: | , , , , |
|---|---|
| Formato: | Online |
| Lenguaje: | eng |
| Publicado: |
Instituto de Ecología, A.C.
2019
|
| Acceso en línea: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1458 |
| _version_ | 1799771353371377664 |
|---|---|
| author | Martínez Orea, Yuriana Castillo-Argüero, Silvia Orozco-Segovia, Alma Zavala-Hurtado, J. Alejandro Bonilla-Valencia, Leticia |
| author_facet | Martínez Orea, Yuriana Castillo-Argüero, Silvia Orozco-Segovia, Alma Zavala-Hurtado, J. Alejandro Bonilla-Valencia, Leticia |
| author_sort | Martínez Orea, Yuriana |
| collection | ABM |
| description | Background and Aims: Temperate forests suffer continuous deforestation and other anthropogenic disturbances. Additionally, some types of forest management, such as secondary vegetation removal ("chaponeo"), can be another disturbance that negatively affects the values of some environmental variables important for seed germination. Light, soil temperature and moisture characterize microsites and determine germination percentages. These variables are also affected by slope orientation and vegetation structure. The aim of this study was to characterize microsites for Symphoricarpos microphyllus seed germination in a temperate forest, its response to light qualities in germination cameras, and seed viability during two years.Methods: Twenty-four microsites that differed according to their position in north/south (N/S) facing slopes, and by the presence/absence of secondary vegetation (“chaponeo”) due to forest management (U-undisturbed/P-perturbed) were characterized for light, soil temperature, moisture, pH and nitrogen. We also studied germination under different light qualities (white light, red light, far red light -FRL-, darkness) in germination cameras and seed viability for two years.Key results: All microsites were different in light, temperature and soil moisture. Microsites with the highest germination percentages were those US (undisturbed south) and UN (undisturbed north), where higher soil moisture and lower temperatures were registered, favoring embryo growth of seeds, since they possess morphophysiological dormancy. In cameras, germination percentages were the highest in FRL (32%). Seeds of S. microphyllus can remain viable for two years (60%).Conclusions: We do not recommend secondary vegetation removal because it affects variables of soil moisture (decreasing it) and temperature (increasing it) in microsites. This negatively influences this species germination, which needs a filtering of light and an alternation of high-low temperatures for dormancy breaking. These findings are important if we consider that the populations of this species are reducing due to overexploitation. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1458 |
| institution | Acta Botanica Mexicana |
| language | eng |
| publishDate | 2019 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-14582022-11-25T21:30:14Z Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy Micrositios seguros para la germinación de Symphoricarpos microphyllus (Caprifoliaceae), una especie arbustiva con latencia Martínez Orea, Yuriana Castillo-Argüero, Silvia Orozco-Segovia, Alma Zavala-Hurtado, J. Alejandro Bonilla-Valencia, Leticia light quality morphophysiological dormancy snowberry shrub temperate forest bosque templado calidad de luz latencia morfofisiológica vara perlilla Background and Aims: Temperate forests suffer continuous deforestation and other anthropogenic disturbances. Additionally, some types of forest management, such as secondary vegetation removal ("chaponeo"), can be another disturbance that negatively affects the values of some environmental variables important for seed germination. Light, soil temperature and moisture characterize microsites and determine germination percentages. These variables are also affected by slope orientation and vegetation structure. The aim of this study was to characterize microsites for Symphoricarpos microphyllus seed germination in a temperate forest, its response to light qualities in germination cameras, and seed viability during two years.Methods: Twenty-four microsites that differed according to their position in north/south (N/S) facing slopes, and by the presence/absence of secondary vegetation (“chaponeo”) due to forest management (U-undisturbed/P-perturbed) were characterized for light, soil temperature, moisture, pH and nitrogen. We also studied germination under different light qualities (white light, red light, far red light -FRL-, darkness) in germination cameras and seed viability for two years.Key results: All microsites were different in light, temperature and soil moisture. Microsites with the highest germination percentages were those US (undisturbed south) and UN (undisturbed north), where higher soil moisture and lower temperatures were registered, favoring embryo growth of seeds, since they possess morphophysiological dormancy. In cameras, germination percentages were the highest in FRL (32%). Seeds of S. microphyllus can remain viable for two years (60%).Conclusions: We do not recommend secondary vegetation removal because it affects variables of soil moisture (decreasing it) and temperature (increasing it) in microsites. This negatively influences this species germination, which needs a filtering of light and an alternation of high-low temperatures for dormancy breaking. These findings are important if we consider that the populations of this species are reducing due to overexploitation. Antecedentes y Objetivos: Los bosques templados sufren continua deforestación y otros disturbios antropogénicos. Además, algunos tipos de manejo forestal, como la remoción de la vegetación secundaria (chaponeo) pueden representar otro disturbio que afecta negativamente algunas variables ambientales importantes en la germinación de las semillas. La luz, temperatura y humedad del suelo caracterizan micrositios y determinan los porcentajes de germinación de las especies. Estas variables también son afectadas por la orientación de la ladera y la estructura de la vegetación. El objetivo de este estudio fue caracterizar micrositios para la germinación de Symphoricarpos microphyllus en un bosque templado, y su respuesta a calidades de luz en cámaras de germinación, y la viabilidad de las semillas en dos años.Métodos: Se caracterizaron 24 micrositios diferentes de acuerdo a su posición en laderas orientadas al norte/sur (N/S), y por la presencia/ausencia de vegetación secundaria -chaponeo- (U-sin disturbio/P-perturbados) en sus variables de luz, temperatura, humedad, pH y nitrógeno del suelo. Estudiamos la germinación bajo diferentes calidades de luz (luz blanca, luz roja, luz rojo lejano -FRL-, oscuridad) en cámaras de germinación y la viabilidad de las semillas por dos años.Resultados clave: Todos los micrositios fueron diferentes en luz, temperatura y humedad del suelo. Los micrositios con los mayores porcentajes de germinación fueron los US (no perturbados al sur) y UN (no perturbados al norte), registrando los mayores valores de humedad del suelo y menores de temperatura, favoreciendo el crecimiento del embrión, dado que poseen una latencia morfofisiológica. En las cámaras, los mayores porcentajes de germinación de Symphoricarpos microphyllus ocurrieron en FRL (32%), la viabilidad se mantuvo en 60% por dos años.Conclusiones: No recomendamos la eliminación de la vegetación secundaria porque afecta la humedad (disminuyéndola) y temperatura del suelo (incrementándola). Esto tiene una influencia negativa sobre la germinación de las semillas que necesitan una filtración de la luz y una alternancia de altas y bajas temperaturas para romper la latencia. Estos hallazgos son importantes si consideramos que las poblaciones de esta especie están reduciéndose debido a sobreexplotación. Instituto de Ecología, A.C. 2019-03-08 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/1458 10.21829/abm126.2019.1458 Acta Botanica Mexicana; No. 126 (2019) Acta Botanica Mexicana; Núm. 126 (2019) 2448-7589 0187-7151 eng https://abm.ojs.inecol.mx/index.php/abm/article/view/1458/4057 https://abm.ojs.inecol.mx/index.php/abm/article/view/1458/4058 https://abm.ojs.inecol.mx/index.php/abm/article/view/1458/1792 Derechos de autor 2019 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | Martínez Orea, Yuriana Castillo-Argüero, Silvia Orozco-Segovia, Alma Zavala-Hurtado, J. Alejandro Bonilla-Valencia, Leticia Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title | Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title_full | Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title_fullStr | Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title_full_unstemmed | Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title_short | Safe microsites for Symphoricarpos microphyllus (Caprifoliaceae) germination, a shrub species with seed dormancy |
| title_sort | safe microsites for symphoricarpos microphyllus (caprifoliaceae) germination, a shrub species with seed dormancy |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1458 |
| work_keys_str_mv | AT martinezoreayuriana safemicrositesforsymphoricarposmicrophylluscaprifoliaceaegerminationashrubspecieswithseeddormancy AT castilloarguerosilvia safemicrositesforsymphoricarposmicrophylluscaprifoliaceaegerminationashrubspecieswithseeddormancy AT orozcosegoviaalma safemicrositesforsymphoricarposmicrophylluscaprifoliaceaegerminationashrubspecieswithseeddormancy AT zavalahurtadojalejandro safemicrositesforsymphoricarposmicrophylluscaprifoliaceaegerminationashrubspecieswithseeddormancy AT bonillavalencialeticia safemicrositesforsymphoricarposmicrophylluscaprifoliaceaegerminationashrubspecieswithseeddormancy AT martinezoreayuriana micrositiossegurosparalagerminaciondesymphoricarposmicrophylluscaprifoliaceaeunaespeciearbustivaconlatencia AT castilloarguerosilvia micrositiossegurosparalagerminaciondesymphoricarposmicrophylluscaprifoliaceaeunaespeciearbustivaconlatencia AT orozcosegoviaalma micrositiossegurosparalagerminaciondesymphoricarposmicrophylluscaprifoliaceaeunaespeciearbustivaconlatencia AT zavalahurtadojalejandro micrositiossegurosparalagerminaciondesymphoricarposmicrophylluscaprifoliaceaeunaespeciearbustivaconlatencia AT bonillavalencialeticia micrositiossegurosparalagerminaciondesymphoricarposmicrophylluscaprifoliaceaeunaespeciearbustivaconlatencia |
