Elemental and isotopic assessment for Colombian orchids from a montane cloud forest: a baseline for global environmental change
| العنوان: | Elemental and isotopic assessment for Colombian orchids from a montane cloud forest: a baseline for global environmental change |
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| المؤلفون: | Edison A. Díaz-Álvarez, Erick de la Barrera, J. David Felix |
| المصدر: | Acta Physiologiae Plantarum. 41 |
| بيانات النشر: | Springer Science and Business Media LLC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Cloud forest, δ13C, Environmental change, Physiology, Ecology, Range (biology), Climate change, Plant Science, Vegetation, 01 natural sciences, 03 medical and health sciences, 030104 developmental biology, Environmental science, Ecosystem, Epiphyte, Agronomy and Crop Science, 010606 plant biology & botany |
| الوصف: | Orchidaceae is the largest family of plants, reaching its maximum diversity in Colombia where 4000 species have been registered. One particular ecosystem with high diversity of orchids is the tropical montane cloud forest characterized by high humidity and low air temperatures. However, due to anthropic pressure such as land use change its area has been reduced. This is not the only anthropic disturbance that can affect the continuity of this forest and orchids, climate change and nitrogen deposition also become threats. By means of elemental composition and isotopic measurements of carbon and nitrogen, we determined the photosynthetic pathway for orchids from a tropical cloud forest in Colombia, for which, we also evaluated the nutritional status of nitrogen and its relationship with atmospheric deposition. We found 46 species from 18 genera; of these, 19 species were epiphytic, 9 lithophytic and 18 terrestrials. The carbon content was not significantly different among the species evaluated, averaging 46.4 ± 0.41% (dry weight). In turn, only one terrestrial orchid had a nitrogen content above 2.2%, averaged 1.4 ± 0.07% for the remaining 45 species. The δ13C that averaged − 28.1 ± 0.4‰ for 45 species was typical of C3 plants, while only one species, whose δ13C of 18.8‰ can be considered CAM. The δ15N values for 44 orchids were negative, in total they ranged from − 8.1 to 4.5‰. It can be concluded that the temperatures in this area are not yet high enough to produce a noticeable change in photosynthesis as evidenced by the carbon content of orchids, however, the expected rise would bring harmful consequences for these populations of orchids, especially when considering that these orchids were collected at the highest altitudinal range of the region. Moreover, the rates of nitrogen deposition are not high enough yet to leave a significant signal in the vegetation. |
| تدمد: | 1861-1664 0137-5881 |
| DOI: | 10.1007/s11738-019-2893-y |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ab5106de637cb6d9ccbbe6e5ea781f24 https://doi.org/10.1007/s11738-019-2893-y |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........ab5106de637cb6d9ccbbe6e5ea781f24 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18611664 01375881 |
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| DOI: | 10.1007/s11738-019-2893-y |