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Data from the publication: Drought decreases water storage capacity of two arboreal epiphytes with differing ecohydrological traits
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| Type: | Resource | |
| Storage: | The size of this resource is 31.9 KB | |
| Created: | Jun 20, 2023 at 3 p.m. | |
| Last updated: | Jun 28, 2023 at 9:55 p.m. | |
| DOI: | 10.4211/hs.4e9723d9937f4adfa7e6f588a2f77ba4 | |
| Citation: | See how to cite this resource |
| Sharing Status: | Published |
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Abstract
The attached datasets are from the publication: Drought decreases water storage capacity of two arboreal epiphytes with differing ecohydrological traits. Canopy epiphytes, plants that grow on trees, can have a significant influence on canopy water storage, interception, and precipitation fluxes. However, the drought response of the plants at a foliar level may influence their ability to store and capture rainfall. We experimentally tested the effects of leaf desiccation on water storage (Smax) and relevant leaf properties of two canopy epiphytes common in coastal maritime forests in Georgia, U.S.A. Full methodological information can be found in the publication listed under "Related Resources."
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Content
Related Resources
| The content of this resource references | Althea F.P. Moore, Jalayna Antoine, Laura I. Bedoya, Ann Medina, Clifton S. Buck, John T. Van Stan, Sybil G. Gotsch, Drought decreases water storage capacity of two arboreal epiphytes with differing ecohydrological traits, Science of The Total Environment, Volume 894, 2023, 164791, ISSN 0048-9697, https://doi.org/10.1016/j.scitotenv.2023.164791. (https://www.sciencedirect.com/science/article/pii/S0048969723034149) Abstract: Arboreal epiphytes, plants that grow on trees, can significantly increase rainwater storage and evaporation (i.e., “interception”) within canopies. Drought conditions may affect this hydrological role, as epiphytes' physiological responses change leaf properties that affect water retention. Drought-induced changes in epiphyte water storage capacity could substantially alter canopy hydrology, but have not been studied. We tested the effects of drought on the water storage capacity (Smax) of leaves and leaf properties of two epiphytes with distinct ecohydrological traits: resurrection fern (Pleopeltis polypodioides), and Spanish moss (Tillandsia usneoides). Both species are common in maritime forests of the Southeastern USA, where climate change is expected to decrease precipitation in spring and summer. To simulate drought, we dried leaves to 75 %, 50 %, and ~25 % of fresh weight, and quantified their Smax in fog chambers. We measured relevant leaf properties: hydrophobicity, minimum leaf conductance (gmin; a measure of water loss under drought), and Normalized Difference Vegetative Index (NDVI). We found that drought significantly reduced Smax and increased leaf hydrophobicity for both species, indicating that lower Smax may be due to shedding of droplets. While the overall reduction in Smax did not differ between the two species, they exhibited distinct drought responses. Dehydrated T. usneoides leaves had lower gmin, demonstrating the ability to limit water loss under drought. P. polypodioides increased gmin when dehydrated, consistent with its extraordinary ability to withstand water loss. NDVI decreased with dehydration in T. usneoides but not P. polypodioides. Our results suggest that increased drought may have a dramatic effect on canopy water cycling by reducing the Smax of epiphytes. Reduced rainfall interception and storage in forest canopies could have widespread effects on hydrological cycling, thus understanding the potential feedbacks of plant drought response on hydrology is crucial. This study highlights the importance of connecting foliar-scale plant response with broader hydrological processes. Keywords: Canopy hydrology; Ecohydrology; Hydrophobicity; Interception capacity; Pleopeltis polypodioides; Tillandsia usneoides; Water storage capacity |
Credits
Funding Agencies
This resource was created using funding from the following sources:
| Agency Name | Award Title | Award Number |
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| National Science Foundation | EAR 2209775 to J. Van Stan, EAR 1954538 to S. Gotsch, and EAR 1954322 to C. Buck |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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