Tree Species and Epiphyte Taxa Determine the Metabolomic niche of Canopy Suspended Soils in a Species-Rich Lowland Tropical Rainforest

0549331 - ÚVGZ 2022 RIV CH eng J - Článek v odborném periodiku
Gargallo-Garriga, Albert - Sardans, Jordi - Alrefaei, A. F. - Klem, Karel - Fuchslueger, L. - Ramirez-Rojas, I. - Donald, J. - Leroy, C. - Langenhove, L. V. - Verbruggen, E. - Janssens, I. A. - Urban, Otmar - Penuelas, J.
Tree Species and Epiphyte Taxa Determine the Metabolomic niche of Canopy Suspended Soils in a Species-Rich Lowland Tropical Rainforest.
Metabolites. Roč. 11, č. 11 (2021), č. článku 718. E-ISSN 2218-1989
Grant CEP: GA MŠMT(CZ) EF16_019/0000797
Výzkumná infrastruktura: CzeCOS III - 90123
Institucionální podpora: RVO:86652079
Klíčová slova: montane cloud forest * vascular epiphytes * plant diversity * edaphic variation * nutrient status * french-guiana * floor soil * heterogeneity * abundance * biomass * bacteria * canopy soils * epiphyte * French Guiana * metabolomics
Obor OECD: Organic chemistry
Impakt faktor: 5.581, rok: 2021
Způsob publikování: Open access
https://www.researchgate.net/publication/355510284_Tree_Species_and_Epiphyte_Taxa_Determine_the_Metabolomic_niche_of_Canopy_Suspended_Soils_in_a_Species-Rich_Lowland_Tropical_Rainforest

Tropical forests are biodiversity hotspots, but it is not well understood how this diversity is structured and maintained. One hypothesis rests on the generation of a range of metabolic niches, with varied composition, supporting a high species diversity. Characterizing soil metabolomes can reveal fine-scale differences in composition and potentially help explain variation across these habitats. In particular, little is known about canopy soils, which are unique habitats that are likely to be sources of additional biodiversity and biogeochemical cycling in tropical forests. We studied the effects of diverse tree species and epiphytes on soil metabolomic profiles of forest floor and canopy suspended soils in a French Guianese rainforest. We found that the metabolomic profiles of canopy suspended soils were distinct from those of forest floor soils, differing between epiphyte-associated and non-epiphyte suspended soils, and the metabolomic profiles of suspended soils varied with host tree species, regardless of association with epiphyte. Thus, tree species is a key driver of rainforest suspended soil metabolomics. We found greater abundance of metabolites in suspended soils, particularly in groups associated with plants, such as phenolic compounds, and with metabolic pathways related to amino acids, nucleotides, and energy metabolism, due to the greater relative proportion of tree and epiphyte organic material derived from litter and root exudates, indicating a strong legacy of parent biological material. Our study provides evidence for the role of tree and epiphyte species in canopy soil metabolomic composition and in maintaining the high levels of soil metabolome diversity in this tropical rainforest. It is likely that a wide array of canopy microsite-level environmental conditions, which reflect interactions between trees and epiphytes, increase the microscale diversity in suspended soil metabolomes.
Trvalý link: http://hdl.handle.net/11104/0325349