Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest
Tropospheric ozone has been suspected to cause poor vitality and occasional massive mortality in sacred fir (Abies religiosa ( Kunth) Schltdl. & Cham) from Desierto de los Leones National Park, in Mexico City, Mexico, since 1980`s. This work searches for empirical evidences of ozone effects...
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| Formaat: | Online |
| Taal: | spa |
| Gepubliceerd in: |
Instituto de Ecología, A.C.
2016
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| Online toegang: | https://myb.ojs.inecol.mx/index.php/myb/article/view/1157 |
| _version_ | 1799769214616076288 |
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| author | González-Medina, Rebeca Eugenia Mendoza-Briseño, Martín Alvarado-Rosales, Dionicio |
| author_facet | González-Medina, Rebeca Eugenia Mendoza-Briseño, Martín Alvarado-Rosales, Dionicio |
| author_sort | González-Medina, Rebeca Eugenia |
| collection | MYB |
| description | Tropospheric ozone has been suspected to cause poor vitality and occasional massive mortality in sacred fir (Abies religiosa ( Kunth) Schltdl. & Cham) from Desierto de los Leones National Park, in Mexico City, Mexico, since 1980`s. This work searches for empirical evidences of ozone effects on health indicators of natural populations of sacred from August 2001 to January 2003. We monitored 31 selectively chosen sampling plots with passive monitors. Two additional fir forests with expected low exposure to ozone were used as control. Mean hourly ozone concentration per period (2 to 3 weeks each), fluctuated between 4,826 x10-7 and 0,0441 ppm. Most ozone readings were high, the mean hourly concentration in Desierto de Los Leones was 0,0186 ppm, but only three readings marginally exceeded a 0,0400 ppm toxic threshold. Ozone concentrations in control areas had a lower average (0 ,0145 ppm), with erratic wide fluctuations. We found no relationship between ozone concentrations and sampling plot location, elevation, temperature or region. Foliage retention, crown density, vigor and stand basal area follow weak, but constant and consistent worsening trends as ozone mean site concentration increases. This trend suggests fir health reduction with increasing ozone concentration; control values are consistent with this trend. This result differs from reports of ozone damages on fir, except the case of Switzerland where fir occurs at high elevations and shows clear anatomic damages due to chronic ozone exposure, just like the Mexican case. |
| format | Online |
| id | oai:oai.myb.ojs.inecol.mx:article-1157 |
| institution | Madera y Bosques |
| language | spa |
| publishDate | 2016 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.myb.ojs.inecol.mx:article-11572018-04-10T19:55:22Z Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest Exposición a ozono en relación a vitalidad en un bosque de oyamel (Abies religiosa ( Kunth) Schltdl. & Cham ) González-Medina, Rebeca Eugenia Mendoza-Briseño, Martín Alvarado-Rosales, Dionicio Fir air pollution urban-forest interface dieback national park forest health Abeto contaminación del aire interfase urbana-forestal muerte descendente parque nacional salud forestal Tropospheric ozone has been suspected to cause poor vitality and occasional massive mortality in sacred fir (Abies religiosa ( Kunth) Schltdl. & Cham) from Desierto de los Leones National Park, in Mexico City, Mexico, since 1980`s. This work searches for empirical evidences of ozone effects on health indicators of natural populations of sacred from August 2001 to January 2003. We monitored 31 selectively chosen sampling plots with passive monitors. Two additional fir forests with expected low exposure to ozone were used as control. Mean hourly ozone concentration per period (2 to 3 weeks each), fluctuated between 4,826 x10-7 and 0,0441 ppm. Most ozone readings were high, the mean hourly concentration in Desierto de Los Leones was 0,0186 ppm, but only three readings marginally exceeded a 0,0400 ppm toxic threshold. Ozone concentrations in control areas had a lower average (0 ,0145 ppm), with erratic wide fluctuations. We found no relationship between ozone concentrations and sampling plot location, elevation, temperature or region. Foliage retention, crown density, vigor and stand basal area follow weak, but constant and consistent worsening trends as ozone mean site concentration increases. This trend suggests fir health reduction with increasing ozone concentration; control values are consistent with this trend. This result differs from reports of ozone damages on fir, except the case of Switzerland where fir occurs at high elevations and shows clear anatomic damages due to chronic ozone exposure, just like the Mexican case. Ozono troposférico se sospecha es causa de pobre vitalidad y ocasional muerte masiva de oyamel (Abies religiosa (Kunth) Schltdl. & Cham) en el Parque Nacional Desierto de los Leones,Ciudad de México, DF, México, registrada desde 1980. Este trabajo relaciona indicadores de salud respecto a exposición a ozono en poblaciones naturales de oyamel de agosto 2001 a enero 2003, usando monitores pasivos en 31 sitios subjetivamente elegidos. Dos áreas de Abies con bajos niveles de ozono esperados sirvieron como testigos. La concentración media por hora de ozono se mantuvo de 4,826x10-7 a 0 ,0441 ppm por intervalo de medición (2 a 3 semanas), que si bien es alto, sólo tres lecturas excedieron ligeramente el umbral tóxico de 0,0400 ppm. La media general en Desierto de Los Leones de 0,0186 ppm superó ligeramente la media de los testigos (0,0145 ppm), habiendo amplias fluctuaciones erráticas entre periodos, sitios y regiones. No se vieron relaciones notorias entre ozono y temperatura, altitud, exposición o región. La retención del follaje, frondosidad de la copa, el vigor y el área basal de la masa mostraron tendencias débiles pero constantes y consistentes que sugieren deterioro de salud del oyamel conforme aumenta el nivel medio de ozono. Las cifras de los sitios de control reiteran esta tendencia. Este fenómeno es distinto de muchos reportes de daño por ozono en Abies, excepto el caso suizo, que es similar al mexicano en cuanto a los patentes daños anatómicos en abetos a gran altitud, atribuibles a exposición crónica a ozono. Instituto de Ecología, A.C. 2016-08-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo evaluado por pares application/pdf https://myb.ojs.inecol.mx/index.php/myb/article/view/1157 10.21829/myb.2010.1641157 Madera y Bosques; Vol. 16 No. 4 (2010): Invierno 2010; 7-19 Madera y Bosques; Vol. 16 Núm. 4 (2010): Invierno 2010; 7-19 2448-7597 1405-0471 spa https://myb.ojs.inecol.mx/index.php/myb/article/view/1157/1337 Derechos de autor 2016 Madera y Bosques |
| spellingShingle | González-Medina, Rebeca Eugenia Mendoza-Briseño, Martín Alvarado-Rosales, Dionicio Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title | Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title_full | Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title_fullStr | Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title_full_unstemmed | Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title_short | Ozone exposition in relation to vitality in a fir (Abies religiosa ( Kunth) Schltdl. & Cham) forest |
| title_sort | ozone exposition in relation to vitality in a fir (abies religiosa ( kunth) schltdl. & cham) forest |
| url | https://myb.ojs.inecol.mx/index.php/myb/article/view/1157 |
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