Academic Journal
Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia
| العنوان: | Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia |
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| المؤلفون: | E. G. Alves, J. Tóta, A. Turnipseed, A. B. Guenther, J. O. W. Vega Bustillos, R. A. Santana, G. G. Cirino, J. V. Tavares, A. P. Lopes, B. W. Nelson, R. A. de Souza, D. Gu, T. Stavrakou, D. K. Adams, J. Wu, S. Saleska, A. O. Manzi |
| المصدر: | Biogeosciences, Vol 15, Pp 4019-4032 (2018) |
| بيانات النشر: | Copernicus Publications, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Ecology LCC:Life LCC:Geology |
| مصطلحات موضوعية: | Ecology, QH540-549.5, Life, QH501-531, Geology, QE1-996.5 |
| الوصف: | Isoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of the seasonal patterns of isoprene fluxes and the associated mechanistic controls is still limited, especially in Amazonian evergreen forests. In this paper, we aim to connect intensive, field-based measurements of canopy isoprene flux over a central Amazonian evergreen forest site with meteorological observations and with tower-mounted camera leaf phenology to improve our understanding of patterns and causes of isoprene flux seasonality. Our results demonstrate that the highest isoprene emissions are observed during the dry and dry-to-wet transition seasons, whereas the lowest emissions were found during the wet-to-dry transition season. Our results also indicate that light and temperature cannot totally explain isoprene flux seasonality. Instead, the camera-derived leaf area index (LAI) of recently mature leaf age class (e.g., leaf ages of 3–5 months) exhibits the highest correlation with observed isoprene flux seasonality (R2 = 0.59, p R2 = 0.52, p |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1726-4170 1726-4189 |
| Relation: | https://www.biogeosciences.net/15/4019/2018/bg-15-4019-2018.pdf; https://doaj.org/toc/1726-4170; https://doaj.org/toc/1726-4189 |
| DOI: | 10.5194/bg-15-4019-2018 |
| URL الوصول: | https://doaj.org/article/f9dafc79ef1443d79319af2cd379d3a9 |
| رقم الانضمام: | edsdoj.f9dafc79ef1443d79319af2cd379d3a9 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 17264170 17264189 |
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| DOI: | 10.5194/bg-15-4019-2018 |