Tree growth response to soil nutrients and neighborhood crowding varies between mycorrhizal types in an old-growth temperate forest

Ren Jing, Fang Sheng, Lin Guigang, Lin Fei, Yuan Zuoqiang, Ye Ji, Wang Xugao, Hao Zhanqing, Fortunel Claire. 2021. Tree growth response to soil nutrients and neighborhood crowding varies between mycorrhizal types in an old-growth temperate forest. Oecologia, 197 (2) : 523-535.

Quartile : Q2, Sujet : ECOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Forest dynamics are shaped by both abiotic and biotic factors. Trees associating with different types of mycorrhizal fungi differ in nutrient use and dominate in contrasting environments, but it remains unclear whether they exhibit differential growth responses to local abiotic and biotic gradients where they co-occur. We used 9-year tree census data in a 25-ha old-growth temperate forest in Northeast China to examine differences in tree growth response to soil nutrients and neighborhood crowding between tree species associating with arbuscular mycorrhizal (AM), ectomycorrhizal (EM), and dual-mycorrhizal (AEM) fungi. In addition, we tested the role of individual-level vs species-level leaf traits in capturing differences in tree growth response to soil nutrients and neighborhood crowding across mycorrhizal types. Across 25 species, soil nutrients decreased AM tree growth, while neighborhood crowding reduced both AM and EM tree growth, and neither soil nor neighbors impacted AEM tree growth. Across mycorrhizal types, individual-level traits were stronger predictors of tree growth than species-level traits. However, most traits poorly mediated tree growth response to soil nutrients and neighborhood crowding. Our findings indicate that mycorrhizal types strongly shape differences in tree growth response to local soil and crowding gradients, and suggest that including plant-mycorrhizae associations in future work offers great potential to improve our understanding of forest dynamics.

Mots-clés Agrovoc : croissance, arbre forestier, forêt tropicale, accroissement forestier, substance nutritive, facteur édaphique, champignon pathogène, forêt, forêt tropicale humide

Mots-clés géographiques Agrovoc : Chine, France

Mots-clés libres : Functional traits, Mycorrhizal type, Neighborhood crowding, Soil nutrients, Tree growth

Agences de financement hors UE : National Natural Science Foundation of China, Natural Science Foundation of Liaoning Province, Kwan Cheng Wong Education Foundation

Auteurs et affiliations

• Ren Jing, CIRAD-BIOS-UMR AMAP (FRA)
• Fang Sheng, CAS (CHN)
• Lin Guigang, CAS (CHN)
• Lin Fei, CAS (CHN)
• Yuan Zuoqiang, CAS (CHN)
• Ye Ji, CAS (CHN)
• Wang Xugao, CAS (CHN)
• Hao Zhanqing, CAS (CHN) - auteur correspondant
• Fortunel Claire, IRD (FRA) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/614311/)

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