2020
Díaz-Álvarez, E. A.; de la Barrera, E.; Barrios-Hernández, E. Y.; Arróniz-Crespo, M.
Morphophysiological screening of potential organisms for biomonitoring nitrogen deposition Journal Article
In: Ecological Indicators, vol. 108, pp. 105729, 2020, ISSN: 1470-160X.
Abstract | Links | BibTeX | Tags: atmospheric pollution, CAM, global change, Latin America, Mexico, neotropical, nitrogen
@article{Díaz-Álvarez2020,
title = {Morphophysiological screening of potential organisms for biomonitoring nitrogen deposition},
author = {E. A. Díaz-Álvarez and E. de la Barrera and E. Y. Barrios-Hernández and M. Arróniz-Crespo},
url = {https://www.sciencedirect.com/science/article/pii/S1470160X19307228},
doi = {10.1016/j.ecolind.2019.105729},
issn = {1470-160X},
year = {2020},
date = {2020-01-06},
journal = {Ecological Indicators},
volume = {108},
pages = {105729},
abstract = {The intensification of different anthropic activities has led to a doubling of the emitted reactive nitrogen species since the second half of the XX century, resulting in the increase of nitrogen deposition. This poses a major threat to global biodiversity. However, in developing countries the monitoring of atmospheric deposition has shown to be difficult. For these reasons, the aim of this study was to assess, by means of a greenhouse dose-response experiment, the biomonitoring potential of two mosses, Braunia secunda and Thuidium delicatulum, and two epiphytic bromeliads, Tillandsia recurvata and Tillandsia usneoides, which are widely distributed in Latin America. A significant increase of the phosphomonoesterase activity was observed for the mosses, particularly under a High-nitrogen treatment, a parameter that decreased for the bromeliads. In turn, the nitrate reductase activity decreased over the course of the experiment for the mosses, but it remained almost unchanged for both tillandsias. While the nitrogen content for the mosses increased, it fluctuated for the bromeliads. Braunia secunda became greener under the Low-nitrogen than under the other treatments, while the coloration for T. delicatulum turned to brown under all treatments. The tillandsias remained visually unchanged under all treatments. The mosses had a clear response to the simulated nitrogen deposition, with B. secunda being more tolerant than T. delicatulum. Neither tillandsia presented a clear response to the treatments. Thus, the moss B. secunda is a very suitable species for biomonitoring nitrogen deposition, while the other species evaluated were deemed unsuitable.},
keywords = {atmospheric pollution, CAM, global change, Latin America, Mexico, neotropical, nitrogen},
pubstate = {published},
tppubtype = {article}
}
2015
Díaz-Álvarez, E. A.; Lindig-Cisneros, R.; de la Barrera, E.
Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa Journal Article
In: PeerJ, vol. 3, pp. e1021, 2015.
Abstract | Links | BibTeX | Tags: acid rain, biodiversity, CAM, conservation physiology, d15N, global change, Laelia, neotropical, nitrogen, orchid, plant nutrition, pollution, stable isotopes
@article{Díaz-Álvarez2015,
title = {Responses to simulated nitrogen deposition by the neotropical epiphytic orchid Laelia speciosa},
author = {E. A. Díaz-Álvarez and R. Lindig-Cisneros and E. de la Barrera},
url = {https://peerj.com/articles/1021/
http://agro.mx/wp-content/uploads/2015/06/031-Díaz-Alvarez-et-al-2015-PeerJ-Laelia.pdf},
doi = {10.7717/peerj.1021},
year = {2015},
date = {2015-06-18},
journal = {PeerJ},
volume = {3},
pages = {e1021},
abstract = {Potential ecophysiological responses to nitrogen deposition, which is considered to be one of the leading causes for global biodiversity loss, were studied for the endangered endemic Mexican epiphytic orchid, Laelia speciosa, via a shadehouse dose-response experiment (doses were 2.5, 5, 10, 20, 40, and 80 kg N ha-1 yr-1) in order to assess the potential risk facing this orchid given impending scenarios of nitrogen deposition. Lower doses of nitrogen of up to 20 kg N ha yr–1, the dose that led to optimal plant performance, acted as fertilizer. For instance, the production of leaves and pseudobulbs were respectively 35% and 36% greater for plants receiving 20 kg N ha yr–1 than under any other dose. Also, the chlorophyll content and quantum yield peaked at 0.66 ± 0.03 g m-2 and 0.85 ± 0.01, respectively, for plants growing under the optimum dose. In contrast, toxic effects were observed at the higher doses of 40 and 80 kg N ha yr–1. The δ13C for leaves averaged –14.7 ± 0.2‰ regardless of the nitrogen dose. In turn, δ15N decreased as the nitrogen dose increased from 0.9 ±0.1‰ under 2.5 kg N ha-1 yr-1 to – 3.1 ± 0.2 ‰ under 80 kg N ha-1 yr-1, indicating that orchids preferentially assimilate NH4+ rather than NO3– of the solution under higher doses of nitrogen. Laelia speciosa showed a clear response to inputs of nitrogen, thus, increasing rates of atmospheric nitrogen deposition can pose an important threat for this species.},
keywords = {acid rain, biodiversity, CAM, conservation physiology, d15N, global change, Laelia, neotropical, nitrogen, orchid, plant nutrition, pollution, stable isotopes},
pubstate = {published},
tppubtype = {article}
}