Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...
This resource contains some files/folders that have non-preferred characters in their name. Show non-conforming files/folders.
This resource contains content types with files that need to be updated to match with metadata changes. Show content type files that need updating.
| Authors: |
|
|
|---|---|---|
| Owners: |
|
This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource. |
| Type: | Resource | |
| Storage: | The size of this resource is 16.8 MB | |
| Created: | Jan 27, 2026 at 6:01 a.m. (UTC) | |
| Last updated: | Jan 27, 2026 at 8:03 a.m. (UTC) | |
| Citation: | See how to cite this resource | |
| Content types: | CSV Content |
| Sharing Status: | Public |
|---|---|
| Views: | 16 |
| Downloads: | 0 |
| +1 Votes: | Be the first one to this. |
| Comments: | No comments (yet) |
Abstract
In the Pacific Northwest, two iconic trees—one native and one invasive—demonstrate opposing trends that may portend meaningful shifts in forest structure. Over recent decades, western redcedar (\textit{Thuja plicata}), characteristic of the region's ordinarily damp and productive coastal forests, has experienced a marked decline. Meanwhile, English holly (\textit{Ilex aquifolium}), known for its adaptability and vigor, has proliferated, and is now designated "invasive" by multiple government agencies. This contrast may reflect underexplored differences between the species' ability to access limited subsurface water supplies during intensifying summer droughts. To assess this possibility, we examined interlinked environmental and tree physiological metrics at two sites in coastal British Columbia. We measured soil moisture, groundwater level, tree shoot water potential and sap flow in the field during a drought period. We supplemented these field measurements with lab-based turgor loss point estimates and analysis of long-term hydroclimate patterns. Results reveal converging evidence of a water-relations advantage for the invasive species, including more sustained water uptake even as shallow soil moisture diminished. We also find that subsurface water was replenished early in the wet season, and significant indicators that wet-season precipitation meaningfully exceeds subsurface storage capacity. This limitation, alongside a widening seasonal moisture deficit, is likely to favor species with the best aligned hydrological niche, regardless of origin, with implications for stewardship.
Subject Keywords
Coverage
Spatial
Content
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
Comments
There are currently no comments
New Comment