Forests, Год журнала: 2024, Номер 15(10), С. 1729 - 1729

Опубликована: Сен. 29, 2024

Studying the altitudinal variation and driving factors of soil acid phosphomonoesterase (ACP) activity in subalpine regions is crucial for understanding nutrient cycling processes within mountainous ecosystems. This study focused on fir (Abies fabri (Mast.) Craib) forests located at three altitudes (2781 m, 3044 3210 m) eastern slope Mt. Gongga southwest China. We measured ACP alongside climate, nutrients, microorganisms various depths elevations to investigate how these influence activity. The results indicated that organic matter horizons (Oe Oa horizons), gradually decreased with elevation. However, surface mineral horizon (A horizon) did not show a decline increasing elevation, which could be attributed significantly lower recorded 2781 m sample site compared site. Variance partitioning analysis revealed among microorganisms, nutrients had most substantial impact across all horizons, particularly high contribution 89.4% observed A horizon. Random forest model further demonstrated total carbon (TC) played role determining Oe importance values 8.5% 7.3%, respectively. Additionally, nitrogen (TN) was identified as primary factor influencing horizon, an value 12.6%. Furthermore, positively regulated by TC:TP TN:TP ratios, indicating stoichiometric control Abies Craib Gongga.

Язык: Английский