Date: October 23, 2026
Xi'an, China: Researchers have uncovered how two key biological factors, mycorrhizal type and life form, jointly but independently determine plant functional trait combinations in temperate mountain forests. The investigation was carried out at the Qinling Huangguan Forest Dynamics Plot, where scientists quantified seven core functional traits across 113 woody species, including 96 arbuscular mycorrhizal (AM) and 17 ectomycorrhizal (ECM) species, alongside 62 tree and 51 shrub taxa.
Field sampling collected standardized leaf and branch material from mature individuals. The team measured morphological traits such as specific leaf area, leaf thickness and leaf dry matter content, as well as chemical traits including leaf carbon, nitrogen and phosphorus concentrations, plus wood density. Multiple statistical approaches were applied: Student's t‑test for intergroup trait comparison, Spearman correlation for relationships between pairwise leaf traits, multiple linear regression to test main and interactive effects, and principal component analysis (PCA) to visualize multivariate trait differentiation.
Results showed that AM species exhibited acquisitive trait signatures with higher specific leaf area and leaf phosphorus concentration. In contrast, ECM plants followed conservative resource use strategies, marked by elevated leaf dry matter content, wood density and leaf carbon concentration. For life forms, shrubs possessed higher specific leaf area to maximize light capture under dim understory conditions, while trees developed thicker leaves and greater leaf dry matter content to endure canopy level high light and transpiration stress.
Notably, no significant interactive effect existed between mycorrhizal types and life forms across all seven measured traits. PCA clearly separated AM–ECM groups along the primary resource trade‑off axis, while trees and shrubs diverged within each mycorrhizal cluster. Life forms primarily modulated leaf morphological traits, whereas mycorrhizal types regulated both morphological and chemical leaf attributes.
These findings demonstrate a two dimensional niche partitioning pattern: belowground mycorrhizal types drive nutrient acquisition divergence, and aboveground life forms mediate light adaptation differentiation. This dual independent regulation expands community functional spectra and mitigates interspecific competition. For mountain forest conservation, preserving complete mycorrhizal assemblages together with tree–shrub vertical hierarchies is essential for sustaining carbon sequestration and nutrient cycling functions.
Original Source
B. Xue, M. Gao, N. Liu, et al., "Life Forms and Mycorrhizal Types Shape Resource-Use Strategies Reflected by Different Functional Traits in Woody Plants of the Qinling Mountains," Biological Diversity (2026): 1–10, https://doi.org/10.1002/bod2.70038 .
Keywords
ecological adaptation, functional traits, life forms, mycorrhizal types, resource strategy
About the Author
Qiulong Yin (Corresponding author), PhD in Science, Northwestern Polytechnical University. His main research interests focus on plant functional traits and plant environmental adaptability.
About the Journal
Biological Diversity (ISSN: 2994-4139) is a peer-reviewed, international, open-access journal sponsored by the South China Botanical Garden, Chinese Academy of Sciences ((SCBG, CAS), and published in partnership with John Wiley & Sons Australia, Ltd. It is dedicated to advancing biodiversity conservation, safeguarding ecosystem functions and services, and promoting the sustainable utilization of biological resources under global environmental change. The journal welcomes original research, reviews, commentaries, and short communications across a broad spectrum of disciplines, including botany, zoology, microbiology, taxonomy, phylogenetics, genomics, cytology, ecology, climatology, economics, sociology, and real-time policy theory. The journal is indexed in Chemical Abstracts Service (CAS) and Directory of Open Access Journals (DOAJ).
