Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2022 Dec 12;13:1062055. doi: 10.3389/fpls.2022.1062055

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2022 Liu, Chen, Yu, Yang, Zhang, Zhang and Han

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

(A) Structure equation modeling exploring the direct and indirect effects of the different factors on the ecosystem carbon use efficiency (CUEe) and (B) standardized effects of the different factors on the CUEe. The blue and red arrows indicate negative and positive relationships, respectively. The dashed line represents a nonsignificant relationship (p > 0.05). The arrow width is proportional to the strength of the relationship. The numbers adjacent to the arrows are standardized path coefficients. * indicates the significance level is less than 0.05. MAT, mean annual temperature; MAP, mean annual precipitation; LAI, leaf area index; SOC, soil organic carbon; NEP, net ecosystem productivity; GPP, gross primary productivity.