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San-Emeterio L, Zavala LM, Jiménez-Morillo NT, Pérez-Ramos IM, González-Pérez JA. Effects of Climate Change on Soil Organic Matter C and H Isotope Composition in a Mediterranean Savannah ( Dehesa): An Assessment Using Py-CSIA. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:13851-13862. [PMID: 37682017 PMCID: PMC10515479 DOI: 10.1021/acs.est.3c01816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 09/09/2023]
Abstract
Dehesas are Mediterranean agro-sylvo-pastoral systems sensitive to climate change. Extreme climate conditions forecasted for Mediterranean areas may change soil C turnover, which is of relevance for soil biogeochemistry modeling. The effect of climate change on soil organic matter (SOM) is investigated in a field experiment mimicking environmental conditions of global change scenarios (soil temperature increase, +2-3 °C, W; rainfall exclusion, 30%, D; a combination of both, W+D). Pyrolysis-compound-specific isotope analysis (Py-CSIA) is used for C and H isotope characterization of SOM compounds and to forecast trends exerted by the induced climate shift. After 2.5 years, significant δ13C and δ2H isotopic enrichments were detected. Observed short- and mid-chain n-alkane δ13C shifts point to an increased microbial SOM reworking in the W treatment; a 2H enrichment of up to 40‰ of lignin methoxyphenols was found when combining W+D treatments under the tree canopy, probably related to H fractionation due to increased soil water evapotranspiration. Our findings indicate that the effect of the tree canopy drives SOM dynamics in dehesas and that, in the short term, foreseen climate change scenarios will exert changes in the SOM dynamics comprising the biogeochemical C and H cycles.
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Affiliation(s)
- Layla
M. San-Emeterio
- Instituto
de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas
(IRNAS-CSIC), Av. Reina
Mercedes 10, 41012 Sevilla, Spain
- Universidad
de Sevilla, MED Soil Res. Group,
Dpt. Cristalografía, Mineralogía y Química Agrícola,
Facultad de Química, C/Prof Garcia Gonzalez 1, 41012 Sevilla, Spain
| | - Lorena M. Zavala
- Universidad
de Sevilla, MED Soil Res. Group,
Dpt. Cristalografía, Mineralogía y Química Agrícola,
Facultad de Química, C/Prof Garcia Gonzalez 1, 41012 Sevilla, Spain
| | - Nicasio T. Jiménez-Morillo
- Instituto
de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas
(IRNAS-CSIC), Av. Reina
Mercedes 10, 41012 Sevilla, Spain
- University
of Évora, Instituto Mediterrâneo
para a Agricultura, Ambiente e Desenvolvimento (MED), Núcleo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Ignacio M. Pérez-Ramos
- Instituto
de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas
(IRNAS-CSIC), Av. Reina
Mercedes 10, 41012 Sevilla, Spain
| | - José A. González-Pérez
- Instituto
de Recursos Naturales y Agrobiología de Sevilla, Consejo Superior de Investigaciones Científicas
(IRNAS-CSIC), Av. Reina
Mercedes 10, 41012 Sevilla, Spain
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Cui G, Pugnaire FI, Yang L, Zhao W, Ale R, Shen W, Luo T, Liang E, Zhang L. Shrub-mediated effects on soil nitrogen determines shrub-herbaceous interactions in drylands of the Tibetan Plateau. FRONTIERS IN PLANT SCIENCE 2023; 14:1137365. [PMID: 36844071 PMCID: PMC9950575 DOI: 10.3389/fpls.2023.1137365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
INTRODUCTION Shrub promotes the survival, growth and reproduction of understory species by buffering the environmental extremes and improving limited resources (i.e., facilitation effect) in arid and semiarid regions. However, the importance of soil water and nutrient availability on shrub facilitation, and its trend along a drought gradient have been relatively less addressed in water-limited systems. METHODS We investigated species richness, plant size, soil total nitrogen and dominant grass leaf δ13C within and outside the dominant leguminous cushion-like shrub Caragana versicolor along a water deficit gradient in drylands of Tibetan Plateau. RESULTS We found that C. versicolor increased grass species richness but had a negative effect on annual and perennial forbs. Along the water deficit gradient, plant interaction assessed by species richness (RIIspecies) showed a unimodal pattern with shift from increase to decrease, while plant interaction assessed by plant size (RIIsize) did not vary significantly. The effect of C. versicolor on soil nitrogen, rather than water availability, determined its overall effect on understory species richness. Neither the effect of C. versicolor on soil nitrogen nor water availability affected plant size. DISCUSSION Our study suggests that the drying tendency in association with the recent warming trends observed in drylands of Tibetan Plateau, will likely hinder the facilitation effect of nurse leguminous shrub on understories if moisture availability crosses a critical minimum threshold.
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Affiliation(s)
- Guangshuai Cui
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Almería, Spain
| | - Francisco I. Pugnaire
- Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Almería, Spain
| | - Liu Yang
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wanglin Zhao
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Rita Ale
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Wei Shen
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Tianxiang Luo
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Eryuan Liang
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
| | - Lin Zhang
- State Key Laboratory of Tibetan Plateau Earth System Science, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
- Institute of Science and Technology Information of Tibet Autonomous Region, Lhasa, China
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Miao C, Bai Y, Zhang Y, She W, Liu L, Qiao Y, Qin S. Interspecific interactions alter plant functional strategies in a revegetated shrub-dominated community in the Mu Us Desert, China. ANNALS OF BOTANY 2022; 130:149-158. [PMID: 35311887 PMCID: PMC9445594 DOI: 10.1093/aob/mcac039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/17/2022] [Indexed: 06/02/2023]
Abstract
BACKGROUND AND AIMS Previous studies investigating plant-plant interactions have focused on plant growth, context dependence and shifts in interactive outcomes. However, changes in functional traits in the context of interactions have been inadequately explored; few studies have focused on the effects of interactions on the plasticity of functional strategies. METHODS We conducted a 4-year removal experiment for the xeric shrub Artemisia ordosica and perennial graminoids (PGs) in the Mu Us Desert, northern China. Soil nutrient content, biomass and 12 functional traits related to plant morphology and nutrient status were measured for the shrub species and a dominant PG species (i.e. Leymus secalinus) in the presence and absence of shrubs and PGs. KEY RESULTS Shrubs affected the functional traits of L. secalinus, reducing leaf dry matter content and increasing plant height, which probably promoted the functional strategy of L. secalinus towards a more resource-acquisitive and competitive strategy. In contrast, when the shrubs were affected by PGs, they shifted towards a resource-conservative and stress-tolerative strategy, by increasing leaf dry matter content and decreasing specific leaf area. Moreover, the shrub species relied more on internal nutrient recycling (higher nitrogen resorption efficiency) rather than on external nitrogen uptake under nitrogen competition; instead, L. secalinus tended to exhibit higher external nitrogen uptake from soil during nitrogen shortages. CONCLUSIONS This study indicated that the functional strategies and nutrient cycling of the shrub species and the dominant PG were altered by each other. The shifts in functional traits may help plants to coexist in the community for a relatively long time. Our findings highlighted that interspecific interactions alter plant functional strategies and provided new insights into community assembly and succession mechanisms in a revegetated shrubland for ecological restoration of drylands.
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Affiliation(s)
- Chun Miao
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Yuxuan Bai
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | | | - Weiwei She
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
- Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Liang Liu
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Yangui Qiao
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Shugao Qin
- Yanchi Research Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
- Engineering Research Center of Forestry Ecological Engineering, Ministry of Education, Beijing Forestry University, Beijing, China
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Navarro‐Cano JA, Goberna M, Valiente‐Banuet A, Verdú M. Phenotypic structure of plant facilitation networks. Ecol Lett 2020; 24:509-519. [DOI: 10.1111/ele.13669] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 11/23/2020] [Accepted: 12/06/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Jose Antonio Navarro‐Cano
- Departamento de Ecología Vegetal Centro de Investigaciones sobre Desertificación (CSIC‐UVEG‐GV) Carretera Moncada ‐ Náquera km 4.5 Moncada Valencia46113Spain
- Departamento de Medio Ambiente y Agronomía Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA Ctra. de la Coruña, km 7.5 Madrid28040
| | - Marta Goberna
- Departamento de Medio Ambiente y Agronomía Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria INIA Ctra. de la Coruña, km 7.5 Madrid28040
| | - Alfonso Valiente‐Banuet
- Departamento de Ecología de la Biodiversidad Instituto de Ecología Universidad Nacional Autónoma de México A.P. 70‐275 México D.FC.P. 04510México
- Centro de Ciencias de la Complejidad Universidad Nacional Autónoma de México Ciudad UniversitariaMéxico D.F04510México
| | - Miguel Verdú
- Departamento de Ecología Vegetal Centro de Investigaciones sobre Desertificación (CSIC‐UVEG‐GV) Carretera Moncada ‐ Náquera km 4.5 Moncada Valencia46113Spain
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Chaieb G, Wang X, Abdelly C, Michalet R. Shift from short‐term competition to facilitation with drought stress is due to a decrease in long‐term facilitation. OIKOS 2020. [DOI: 10.1111/oik.07528] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ghassen Chaieb
- Faculty of Sciences of Bizerte, Univ. of Carthage Zarzouna Tunisia
- Univ. of Bordeaux, UMR CNRS 5805 EPOC, Allée Geoffroy Saint‐Hilaire – CS 50023 FR‐33615 Pessac France
| | - Xiangtai Wang
- State Key Laboratory of Grassland and Agro‐ecosystems, School of Life Sciences, Lanzhou Univ., Lanzhou Gansu PR China
| | - Chedly Abdelly
- Laboratory of Extremophiles Plants, Center of Biotechnology of Borj Cedria, 2050 Tunisia
| | - Richard Michalet
- Univ. of Bordeaux, UMR CNRS 5805 EPOC, Allée Geoffroy Saint‐Hilaire – CS 50023 FR‐33615 Pessac France
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Wang C, Michalet R, Liu Z, Jiang X, Wang X, Zhang G, An L, Chen S, Xiao S. Disentangling Large- and Small-Scale Abiotic and Biotic Factors Shaping Soil Microbial Communities in an Alpine Cushion Plant System. Front Microbiol 2020; 11:925. [PMID: 32528430 PMCID: PMC7262953 DOI: 10.3389/fmicb.2020.00925] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/20/2020] [Indexed: 12/20/2022] Open
Abstract
Microorganisms play a crucial role in biogeochemical cycles and ecosystem processes, but the key factors driving microbial community structure are poorly understood, particularly in alpine environments. In this study, we aim to disentangle the relative contribution of abiotic and biotic factors shaping bacterial and fungal community structure at large and small spatial and integration scales in an alpine system dominated by a stress-tolerant cushion species Thylacospermum ceaspitosum. These effects were assessed in two mountain ranges of northwest China and for two contrasting phenotypes of the cushion species inhabiting two different microtopographic positions. The large- and small-scale abiotic effects include the site and microhabitat effects, respectively, while the large- and small-scale biotic effects include the effects of cushion presence and cushion phenotype, respectively. Soil microbial communities were characterized by Illumina Miseq sequencing. Uni- and multivariate statistics were used to test the effects of abiotic and biotic factors at both scales. Results indicated that the site effect representing the soil pH and abiotic hydrothermal conditions mainly affected bacterial community structure, whereas fungal community structure was mainly affected by biotic factors with an equal contribution of cushion presence and cushion phenotype effects. Future studies should analyze the direct factors contributing to shaping microbial community structure in particular of the cushion phenotypes.
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Affiliation(s)
- Chenyue Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Richard Michalet
- Environnements et Paléoenvironnements Océaniques et Continentaux, University of Bordeaux, Bordeaux, France
| | - Ziyang Liu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Xingpei Jiang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Xiangtai Wang
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Gaosen Zhang
- Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Extreme Environmental Microbial Resources and Engineering, Lanzhou, China
| | - Lizhe An
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Shuyan Chen
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
| | - Sa Xiao
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, Lanzhou University, Lanzhou, China
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