English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Carbon isotope ratio (δ13C) has been used as an indicator of water stress because plants discriminate less against 13C when under stress. The depth-to-water (DTW) topographic index provides an estimation of soil moisture based on topographic position and other characteristics of a site. To evaluate whether DTW and carbon isotope discrimination were related and to determine if these relationships are influenced by climate, we sampled three time periods, which differed in the amount of annual precipitation (MAP), from tree cores collected from 42 trembling aspen and 43 white spruce trees growing along DTW gradients at two locations in central Alberta, Canada. Increasing MAP led to lower δ13C, indicating less drought stress as water availability increases, while δ13C increased with DTW up to a threshold value, after which the relationship levelled off, suggesting that higher DTW values represent stress-inducing soil conditions. DTW and MAP were then combined into models (aspen, R2 = 0.72; spruce, R2 = 0.44) ...

Carbon isotope discrimination by Picea glauca and Populus tremuloides is related to the topographic depth to water index and rainfall