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Gargallo-Garriga A, Sardans J, Alrefaei AF, Klem K, Fuchslueger L, Ramírez-Rojas I, Donald J, Leroy C, Langenhove LV, Verbruggen E, Janssens IA, Urban O, Peñuelas J. Tree Species and Epiphyte Taxa Determine the " Metabolomic niche" of Canopy Suspended Soils in a Species-Rich Lowland Tropical Rainforest. Metabolites 2021; 11:718. [PMID: 34822376 PMCID: PMC8621298 DOI: 10.3390/metabo11110718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/23/2021] [Accepted: 09/28/2021] [Indexed: 11/18/2022] Open
Abstract
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.
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Affiliation(s)
- Albert Gargallo-Garriga
- Global Change Research Institute of the Czech Academy of Sciences, The Czech Academy of Sciences, Bělidla 986/4a, CZ-60300 Brno, Czech Republic; (J.S.); (K.K.); (O.U.)
- Global Ecology Unit CREAF-CSIC-UAB, Consejo Superior de Investigaciones Científicas (CSIC), Bellaterra, 08193 Catalonia, Spain;
- CREAF, Cerdanyola del Vallès, 08193 Catalonia, Spain
| | - Jordi Sardans
- Global Change Research Institute of the Czech Academy of Sciences, The Czech Academy of Sciences, Bělidla 986/4a, CZ-60300 Brno, Czech Republic; (J.S.); (K.K.); (O.U.)
- Global Ecology Unit CREAF-CSIC-UAB, Consejo Superior de Investigaciones Científicas (CSIC), Bellaterra, 08193 Catalonia, Spain;
- CREAF, Cerdanyola del Vallès, 08193 Catalonia, Spain
| | - Abdulwahed Fahad Alrefaei
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Karel Klem
- Global Change Research Institute of the Czech Academy of Sciences, The Czech Academy of Sciences, Bělidla 986/4a, CZ-60300 Brno, Czech Republic; (J.S.); (K.K.); (O.U.)
| | - Lucia Fuchslueger
- Centre of Microbiology and Environmental Systems Science, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria;
- Department of Biology, University of Antwerp, BE-2610 Wilrijk, Belgium; (I.R.-R.); (L.V.L.); (E.V.); (I.A.J.)
| | - Irene Ramírez-Rojas
- Department of Biology, University of Antwerp, BE-2610 Wilrijk, Belgium; (I.R.-R.); (L.V.L.); (E.V.); (I.A.J.)
| | - Julian Donald
- Centre for Ecology and Conservation, University of Exeter, Penryn TR10 9FE, UK;
| | - Celine Leroy
- AMAP, University Montpellier, CIRAD, CNRS, INRAE, IRD, 34000 Montpellier, France;
- ECOFOG, CNRS, CIRAD, AgroParisTech, INRAE, Université des Antilles, Université de Guyane, 97310 Kourou, France
| | - Leandro Van Langenhove
- Department of Biology, University of Antwerp, BE-2610 Wilrijk, Belgium; (I.R.-R.); (L.V.L.); (E.V.); (I.A.J.)
| | - Erik Verbruggen
- Department of Biology, University of Antwerp, BE-2610 Wilrijk, Belgium; (I.R.-R.); (L.V.L.); (E.V.); (I.A.J.)
| | - Ivan A. Janssens
- Department of Biology, University of Antwerp, BE-2610 Wilrijk, Belgium; (I.R.-R.); (L.V.L.); (E.V.); (I.A.J.)
| | - Otmar Urban
- Global Change Research Institute of the Czech Academy of Sciences, The Czech Academy of Sciences, Bělidla 986/4a, CZ-60300 Brno, Czech Republic; (J.S.); (K.K.); (O.U.)
| | - Josep Peñuelas
- Global Ecology Unit CREAF-CSIC-UAB, Consejo Superior de Investigaciones Científicas (CSIC), Bellaterra, 08193 Catalonia, Spain;
- CREAF, Cerdanyola del Vallès, 08193 Catalonia, Spain
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Ventre-Lespiaucq AB, Delgado JA, Ospina-Calderón NH, Otero JT, Escudero A, Sánchez MA, Balaguer L, Flanagan NS. A tropical epiphytic orchid uses a low-light interception strategy in a spatially heterogeneous light environment. Biotropica 2017. [DOI: 10.1111/btp.12425] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Juan A. Delgado
- Department of Ecology; Universidad Complutense de Madrid; C/ José Antonio Nováis 2 28040 Madrid Spain
| | - Nhora H. Ospina-Calderón
- Department of Natural Sciences and Mathematics; Pontificia Universidad Javeriana-Cali; Calle 18 No. 118-250 Cali Colombia
| | - Joel T. Otero
- Department of Biological Sciences; Universidad Nacional de Colombia; Palmira Campus Carrera 32 No. 12 - 00 Palmira Colombia
| | - Adrián Escudero
- Department of Biology and Geology; Universidad Rey Juan Carlos; Calle Tulipán, s/n 28933 Móstoles Spain
| | - María A. Sánchez
- Faculty of Ecology; Fundación Universitaria de Popayán; Vereda Los Robles Km 8 Vía Panamericana al Sur Popayán Colombia
| | - Luis Balaguer
- Department of Plant Biology I; Universidad Complutense de Madrid; C/ José Antonio Nováis 2 28040 Madrid Spain
| | - Nicola S. Flanagan
- Department of Natural Sciences and Mathematics; Pontificia Universidad Javeriana-Cali; Calle 18 No. 118-250 Cali Colombia
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Wang Z, Liu X, Bao W. Higher photosynthetic capacity and different functional trait scaling relationships in erect bryophytes compared with prostrate species. Oecologia 2015; 180:359-69. [PMID: 26552378 DOI: 10.1007/s00442-015-3484-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 10/14/2015] [Indexed: 11/28/2022]
Abstract
Ecophysiological studies of bryophytes have generally been conducted at the shoot or canopy scale. However, their growth forms are diverse, and knowledge of whether bryophytes with different shoot structures have different functional trait levels and scaling relationships is limited. We collected 27 bryophyte species and categorised them into two groups based on their growth forms: erect and prostrate species. Twenty-one morphological, nutrient and photosynthetic traits were quantified. Trait levels and bivariate trait scaling relationships across species were compared between the two groups. The two groups had similar mean values for shoot mass per area (SMA), light saturation point and mass-based nitrogen (N(mass)) and phosphorus concentrations. Erect bryophytes possessed higher values for mass-based chlorophyll concentration (Chl(mass)), light-saturated assimilation rate (A(mass)) and photosynthetic nitrogen/phosphorus use efficiency. N(mass), Chl(mass) and A(mass) were positively related, and these traits were negatively associated with SMA. Furthermore, the slope of the regression of N(mass) versus Chl(mass) was steeper for erect bryophytes than that for prostrate bryophytes, whereas this pattern was reversed for the relationship between Chl(mass) and A(mass). In conclusion, erect bryophytes possess higher photosynthetic capacities than prostrate species. Furthermore, erect bryophytes invest more nitrogen in chloroplast pigments to improve their light-harvesting ability, while the structure of prostrate species permits more efficient light capture. This study confirms the effect of growth form on the functional trait levels and scaling relationships of bryophytes. It also suggests that bryophytes could be good models for investigating the carbon economy and nutrient allocation of plants at the shoot rather than the leaf scale.
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Affiliation(s)
- Zhe Wang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, 610041, Sichuan, People's Republic of China
| | - Xin Liu
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, 610041, Sichuan, People's Republic of China
| | - Weikai Bao
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, 610041, Sichuan, People's Republic of China.
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