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Brenner CL, Valdez SR, Zhang YS, Shaver EC, Hughes BB, Silliman BR, Morton JP. Sediment carbon storage differs in native and non-native Caribbean seagrass beds. MARINE ENVIRONMENTAL RESEARCH 2024; 194:106307. [PMID: 38150787 DOI: 10.1016/j.marenvres.2023.106307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 12/29/2023]
Abstract
Non-native species are expanding globally and can alter ecosystem functions, including food web dynamics, community structure and carbon storage. Seagrass are foundation species that contribute a variety of ecosystem services in near-shore coastal ecosystems, including a significant sink of carbon. In the Caribbean, the rapidly expanding non-native Halophila stipulacea has unknown impacts on carbon storage. To investigate the impacts on carbon storage, we quantified organic carbon (Corg) content in sediment and seagrass tissues from monotypic H. stipulacea beds, mixed native seagrass beds dominated by Thalassia testudinum and Syringodium filiforme, and unvegetated substrate in St. John, USVI. We found native seagrass-vegetated sediment contained 1.3 times more Corg than sediment covered by H. stipulacea, and 1.6 times more Corg than unvegetated areas on average. Whereas, H. stipulacea-dominated substrate stored 1.2 times more Corg than unvegetated substrate. Likewise, native species contained 2.2 times more aboveground biomass and 6.0 times more belowground biomass than H. stipulacea. Since seagrasses are critical sources of carbon sequestration, our results suggest that invading H. stipulacea is associated with lower carbon stocks which has potential implications for conservation activities and climate change mitigation.
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Affiliation(s)
- Catherine L Brenner
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA.
| | - Stephanie R Valdez
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA
| | - Y Stacy Zhang
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA; Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Elizabeth C Shaver
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA; The Nature Conservancy, 4245 Fairfax Dr. #100, Arlington, VA 22203, USA
| | - Brent B Hughes
- Sonoma State University, Department of Biology, 1801 E Cotati Ave, Rohnert Park, CA 94928, USA
| | - Brian R Silliman
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA
| | - Joseph P Morton
- Division of Marine Science and Conservation, Nicholas School of the Environment, Duke University, 135 Duke Marine Lab Rd., Beaufort, NC 28516, USA; Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, 32611, USA
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2
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Zhang G, Bai J, Tebbe CC, Huang L, Jia J, Wang W, Wang X, Zhao Q, Wen L, Kong F, Xi M, He Q. Habitat-specific responses of soil organic matter decomposition to Spartina alterniflora invasion along China's coast. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2024; 34:e2741. [PMID: 36103141 DOI: 10.1002/eap.2741] [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: 04/30/2022] [Revised: 07/03/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
Plant invasions cause a fundamental change in soil organic matter (SOM) turnover. Disentangling the biogeographic patterns and key drivers of SOM decomposition and its temperature sensitivity (Q10 ) under plant invasion is a prerequisite for making projections of global carbon feedback. We collected soil samples along China's coast across saltmarshes to mangrove ecosystems invaded by the smooth cordgrass (Spartina alterniflora Loisel.). Microcosm experiments were carried out to determine the patterns of SOM decomposition and its thermal response. Soil microbial biomass and communities were also characterized accordingly. SOM decomposition constant dramatically decreased along the mean annual temperature gradient, whereas the cordgrass invasion retarded this change (significantly reduced slope, p < 0.05). The response of Q10 to invasion and the soil microbial quotient peaked at midlatitude saltmarshes, which can be explained by microbial metabolism strategies. Climatic variables showed strong negative controls on the Q10 , whereas dissolved carbon fraction exerted a positive influence on its spatial variance. Higher microbial diversity appeared to weaken the temperature-related response of SOM decomposition, with apparent benefits for carbon sequestration. Inconsistent responses to invasion were exhibited among habitat types, with SOM accumulation in saltmarshes but carbon loss in mangroves, which were explained, at least in part, by the SOM decomposition patterns under invasion. This study elucidates the geographic pattern of SOM decomposition and its temperature sensitivity in coastal ecosystems and underlines the importance of interactions between climate, soil, and microbiota for stabilizing SOM under plant invasion.
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Affiliation(s)
- Guangliang Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, People's Republic of China
| | - Junhong Bai
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, People's Republic of China
| | | | - Laibin Huang
- Department of Land, Air and Water Resources, University of California-Davis, Davis, California, USA
| | - Jia Jia
- Henan Key Laboratory of Ecological Environment Protection and Restoration of Yellow River Basin, Yellow River Institute of Hydraulic Research, Zhengzhou, People's Republic of China
| | - Wei Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, People's Republic of China
| | - Xin Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, People's Republic of China
| | - Qingqing Zhao
- Qilu University of Technology (Shandong Academy of Sciences), Ji'nan, People's Republic of China
- Ecology Institute of Shandong Academy of Sciences, Ji'nan, People's Republic of China
| | - Lixiang Wen
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, People's Republic of China
| | - Fanlong Kong
- College of Environmental Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Min Xi
- College of Environmental Science and Engineering, Qingdao University, Qingdao, People's Republic of China
| | - Qiang He
- Coastal Ecology Lab, MOE Key Laboratory for Biodiversity Science and Ecological Engineering, National Observation and Research Station for Wetland Ecosystems of the Yangtze Estuary (Shanghai), School of Life Sciences, Fudan University, Shanghai, People's Republic of China
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Romero-Blanco A, Castro-Díez P, Lázaro-Lobo A, Molina-Venegas R, Cruces P, Pyšek P. Searching for predictors of the variability of impacts caused by non-native trees on regulating ecosystem services worldwide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 877:162961. [PMID: 36958556 DOI: 10.1016/j.scitotenv.2023.162961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 05/06/2023]
Abstract
Humans have introduced non-native trees (NNT) all over the world to take advantage of the plethora of benefits they provide. However, depending on the context, NNT may present a diverse range of effects on ecosystem services (ES), from benefits to drawbacks, which may hinder the development of policies for these species. Unfortunately, the attempts so far to understand the impacts of NNT on ES only explained a low proportion of their variation. Here we analyze the variation in impacts of NNT on regulating ecosystem services (RES) by using a global database, which covers the effect size of multiple NNT species on six RES (climate regulation, soil erosion regulation, soil fertility, soil formation, hydrological cycle regulation, and fire protection). We used a wide range of predictors to account for the context-dependency of impacts distributed in five groups: the RES type, functional traits of both the NNT and the dominant NT of the recipient ecosystem, phylogenetic and functional distances between NNT and NT, climatic context, and human population characteristics. Using boosted regression trees and regression trees, we found that the most influential predictors of NNT impacts on RES were annual mean temperatures and precipitation seasonality, followed by the type of RES, human population density, and NNT height. In regions with warm temperatures and low seasonality, NNT tended to increase RES. NNT impacts were greater in densely populated regions. Smaller NNT exerted greater positive impacts on climate regulation and soil erosion regulation in tropical regions than in other climates. We highlight that benign climates and high population density exacerbate the effects of NNT on RES, and that soil fertility is the most consistently affected RES. Knowledge of the factors that modulate NNT impacts can help to predict their potential effects on RES in different parts of the world and at various environmental settings.
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Affiliation(s)
- Alberto Romero-Blanco
- Universidad de Alcalá, Facultad de Ciencias, Department of Life Sciences, Unidad de Ecología, Biological Invasions Research Group, Plaza de San Diego S/N, Alcalá de Henares, 28805 Madrid, Spain.
| | - Pilar Castro-Díez
- Universidad de Alcalá, Facultad de Ciencias, Department of Life Sciences, Unidad de Ecología, Biological Invasions Research Group, Plaza de San Diego S/N, Alcalá de Henares, 28805 Madrid, Spain
| | - Adrián Lázaro-Lobo
- Universidad de Alcalá, Facultad de Ciencias, Department of Life Sciences, Unidad de Ecología, Biological Invasions Research Group, Plaza de San Diego S/N, Alcalá de Henares, 28805 Madrid, Spain
| | - Rafael Molina-Venegas
- Departamento de Ecología, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain; Universidad de Alcalá, Facultad de Ciencias, Department of Life Sciences, Unidad de Ecología, Global Change Ecology and Evolution Group, Plaza de San Diego S/N, Alcalá de Henares, 28805 Madrid, Spain
| | - Paula Cruces
- Universidad de Alcalá, Facultad de Ciencias, Department of Life Sciences, Unidad de Ecología, Biological Invasions Research Group, Plaza de San Diego S/N, Alcalá de Henares, 28805 Madrid, Spain
| | - Petr Pyšek
- Czech Academy of Sciences, Institute of Botany, Department of Invasion Ecology, CZ-252 43 Průhonice, Czech Republic; Department of Ecology, Faculty of Science, Charles University, Viničná 7, CZ-128 44 Prague, Czech Republic
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4
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An invasive species spread by threatened diurnal lemurs impacts rainforest structure in Madagascar. Biol Invasions 2020. [DOI: 10.1007/s10530-020-02293-7] [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]
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Drivers of Foliar Fungal Endophytic Communities of Kudzu (Pueraria montana var. lobata) in the Southeast United States. DIVERSITY 2020. [DOI: 10.3390/d12050185] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fungal endophytes play important roles in plant fitness and plant–microbe interactions. Kudzu (Pueraria montana var. lobata) is a dominant, abundant, and highly aggressive invasive plant in the Southeast United States. Kudzu serves as a pathogen reservoir that impacts economically important leguminous crops. We conducted the first investigations on kudzu fungal endophytes (Illumina MiSeq—ITS2) to elucidate drivers of endophytic communities across the heart of the invasive range in the Southeast United States (TN, MS, AL, GA). We tested the impacts of multiple environmental parameters (Chlorophyll, NO3−, K+, soil pH, leaf area, host genotype, traffic intensity, and geographic location) on foliar endophyte communities. Endophytic communities were diverse and structured by many factors in our PerMANOVA analyses, but location, genotype, and traffic (proxy for pollution) were the strongest drivers of community composition (R2 = 0.152, p < 0.001, R2 = 0.129, p < 0.001, and R2 = 0.126, p < 0.001, respectively). Further, we examined the putative ecological interactions between endophytic fungi and plant pathogens. We identify numerous OTUs that are positively and strongly associated with pathogen occurrence, largely within the families Montagnulaceae and Tremellales incertae sedis. Taken together, these data suggest location, host genetics and local pollution play instrumental roles in structuring communities, and integrative plant management must consider these factors when developing management strategies.
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Kumar Rai P, Singh JS. Invasive alien plant species: Their impact on environment, ecosystem services and human health. ECOLOGICAL INDICATORS 2020; 111:106020. [PMID: 32372880 PMCID: PMC7194640 DOI: 10.1016/j.ecolind.2019.106020] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 10/03/2019] [Accepted: 12/15/2019] [Indexed: 05/18/2023]
Abstract
Ecological perturbations caused by biotic invasion have been identified as a growing threat to global sustainability. Invasive alien plants species (IAPS) are considered to be one of the major drivers of biodiversity loss and thereby altering the ecosystem services and socio-economic conditions through different mechanisms. Although the ecological impacts of IAPS are well documented, there is a dearth of studies regarding their economic quantification, livelihood considerations, biotechnological prospects (phytoremediation, bioenergy, phyto-synthesis of nanoparticles, biomedical, industrial applications etc.) and human health risk assessments of IAPS. In this context, the current panoramic review aimed to investigate the environmental, socio-ecological and health risks posed by IAPS as well as the compounded impact of IAPS with habitat fragmentation, climate and land use changes. To this end, the need of an integrated trans-disciplinary research is emphasized for the sustainable management of IAPS. The management prospects can be further strengthened through their linkage with geo-spatial technologies (remote sensing and GIS) by mapping and monitoring the IAPS spread. Further, the horizon of IAPS management is expanded to ecological indicator perspectives of IAPS, biosecurity, and risk assessment protocols with critical discussion. Moreover, positive as well as negative implications of the IAPS on environment, health, ecosystem services and socio-economy (livelihood) are listed so that a judicious policy framework could be developed for the IAPS management in order to mitigate the human health implications.
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Affiliation(s)
- Prabhat Kumar Rai
- Phyto-technologies and Invasion Lab, Department of Environmental Science, School of Earth Sciences and Natural Resources Management, Mizoram University, Aizawl, Mizoram, India
| | - J S Singh
- Ecosystem Analysis Lab, Centre of Advanced Study in Botany, Banaras Hindu University (B.H.U.), Varanasi, 221005, India
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Plant Invasion Has Limited Impact on Soil Microbial α-Diversity: A Meta-Analysis. DIVERSITY 2020. [DOI: 10.3390/d12030112] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Plant invasion has proven to be a significant driver of ecosystem change, and with the increased probability of invasion due to globalization, agricultural practices and other anthropogenic causes, it is crucial to understand its impact across multiple trophic levels. With strong linkages between above and belowground processes, the response of soil microorganisms to plant invasion is the next logical step in developing our conceptual understanding of this complex system. In our study, we utilized a meta-analytical approach to better understand the impacts of plant invasion on soil microbial diversity. We synthesized 70 independent studies with 23 unique invaders across multiple ecosystem types to search for generalizable trends in soil microbial α-diversity following invasion. When possible, soil nutrient metrics were also collected in an attempt to understand the contribution of nutrient status shifts on microbial α-diversity. Our results show plant invasion to have highly heterogenous and limited impacts on microbial α-diversity. When taken together, our study indicates soil microbial α-diversity to remain constant following invasion, contrary to the aboveground counterparts. As our results suggest a decoupling in patterns of below and aboveground diversity, future work is needed to examine the drivers of microbial diversity patterns following invasion.
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Abgrall C, Forey E, Chauvat M. Soil fauna responses to invasive alien plants are determined by trophic groups and habitat structure: a global meta‐analysis. OIKOS 2019. [DOI: 10.1111/oik.06493] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
| | - Estelle Forey
- Normandie Univ, UNIROUEN, IRSTEA, ECODIV FR‐76000 Rouen France
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9
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Boltovskoy D, Sylvester F, Paolucci EM. Invasive species denialism: Sorting out facts, beliefs, and definitions. Ecol Evol 2018; 8:11190-11198. [PMID: 30519436 PMCID: PMC6262740 DOI: 10.1002/ece3.4588] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 07/11/2018] [Accepted: 09/13/2018] [Indexed: 11/24/2022] Open
Abstract
In the last decades, thousands of investigations confirmed the detrimental effects of species translocated by man outside of their native ranges (nonindigenous species, or NIS). However, results concluding that many NIS have null, neutral, or positive impacts on the biota and on human interests are as common in the scientific literature as those that point at baneful impacts. Recently, several scholars confronted the stand that origin per se is not a reliable indicator of negative effects, suggesting that such conclusions are the expression of scientific denialism, often led by spurious purposes, and that their numbers are increasing. When assessed in the context of the growing interest in introduced species, the proportion of academic publications claiming that NIS pose no threats to the environment and to social and economic interests is extremely low, and has not increased since 1990. The widely prevailing notion that many NIS are effectively or potentially harmful does not conflict with the fact that most have mixed (negative, neutral, and positive) impacts. When based on solid grounds, reports of positive or neutral impacts should not be labeled as manipulative or misleading unless proven otherwise, even if they may hamper interest in- and funding of research and control bioinvasion programs.
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Affiliation(s)
- Demetrio Boltovskoy
- IEGEBA (CONICET‐UBA), Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
| | - Francisco Sylvester
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
- Instituto para el Estudio de la Biodiversidad de Invertebrados (IEBI), Facultad de Ciencias NaturalesUniversidad Nacional de SaltaSaltaArgentina
| | - Esteban M. Paolucci
- IEGEBA (CONICET‐UBA), Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
- Consejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina
- Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (CONICET‐MACN)Buenos AiresArgentina
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10
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Davidson IC, Cott GM, Devaney JL, Simkanin C. Differential effects of biological invasions on coastal blue carbon: A global review and meta-analysis. GLOBAL CHANGE BIOLOGY 2018; 24:5218-5230. [PMID: 30270555 DOI: 10.1111/gcb.14426] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 04/17/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
Human-caused shifts in carbon (C) cycling and biotic exchange are defining characteristics of the Anthropocene. In marine systems, saltmarsh, seagrass, and mangrove habitats-collectively known as "blue carbon" and coastal vegetated habitats (CVHs)-are a leading sequester of global C and increasingly impacted by exotic species invasions. There is growing interest in the effect of invasion by a diverse pool of exotic species on C storage and the implications for ecosystem-based management of these systems. In a global meta-analysis, we synthesized data from 104 papers that provided 345 comparisons of habitat-level response (plant and soil C storage) from paired invaded and uninvaded sites. We found an overall net effect of significantly higher C pools in invaded CVHs amounting to 40% (±16%) higher C storage than uninvaded habitat, but effects differed among types of invaders. Elevated C storage was driven by blue C-forming plant invaders (saltmarsh grasses, seagrasses, and mangrove trees) that intensify biomass per unit area, extend and elevate coastal wetlands, and convert coastal mudflats into C-rich vegetated habitat. Introduced animal and structurally distinct primary producers had significant negative effects on C pools, driven by herbivory, trampling, and native species displacement. The role of invasion manifested differently among habitat types, with significant C storage increases in saltmarshes, decreases in seagrass, and no significant effect in mangroves. There were also counter-directional effects by the same species in different systems or locations, which underscores the importance of combining data mining with analyses of mean effect sizes in meta-analyses. Our study provides a quantitative basis for understanding differential effects of invasion on blue C habitats and will inform conservation strategies that need to balance management decisions involving invasion, C storage, and a range of other marine biodiversity and habitat functions in these coastal systems.
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Affiliation(s)
- Ian C Davidson
- Smithsonian Environmental Research Center, Edgewater, Maryland
| | - Grace M Cott
- Smithsonian Environmental Research Center, Edgewater, Maryland
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork, Ireland
- Environmental Research Institute, University College Cork, Cork, Ireland
| | - John L Devaney
- Smithsonian Environmental Research Center, Edgewater, Maryland
- Botany Department, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
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Fry EL, De Long JR, Álvarez Garrido L, Alvarez N, Carrillo Y, Castañeda‐Gómez L, Chomel M, Dondini M, Drake JE, Hasegawa S, Hortal S, Jackson BG, Jiang M, Lavallee JM, Medlyn BE, Rhymes J, Singh BK, Smith P, Anderson IC, Bardgett RD, Baggs EM, Johnson D. Using plant, microbe, and soil fauna traits to improve the predictive power of biogeochemical models. Methods Ecol Evol 2018. [DOI: 10.1111/2041-210x.13092] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ellen L. Fry
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
| | - Jonathan R. De Long
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
- Department of Terrestrial EcologyNetherlands Institute of Ecology Wageningen The Netherlands
| | - Lucía Álvarez Garrido
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
- Department of Animal Biology, Plant Biology and EcologyUniversity of Jaén Jaén Spain
| | - Nil Alvarez
- IRTA Aquatic Ecosystems Sant Carles de la Ràpita Spain
| | - Yolima Carrillo
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | | | - Mathilde Chomel
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
| | - Marta Dondini
- Institute of Biological & Environmental SciencesUniversity of Aberdeen Aberdeen UK
| | - John E. Drake
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
- Department of Forest and Natural Resources ManagementSUNY College of Environmental Science and Forestry Syracuse New York
| | - Shun Hasegawa
- Department of Forest Ecology and ManagementSwedish University of Agricultural Sciences Umeå Sweden
| | - Sara Hortal
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | - Benjamin G. Jackson
- Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh Midlothian UK
| | - Mingkai Jiang
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | - Jocelyn M. Lavallee
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
| | - Belinda E. Medlyn
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | - Jennifer Rhymes
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
- School of Geography, Earth and Environmental SciencesUniversity of Plymouth Plymouth UK
| | - Brajesh K. Singh
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | - Pete Smith
- IRTA Aquatic Ecosystems Sant Carles de la Ràpita Spain
| | - Ian C. Anderson
- Hawkesbury Institute for the EnvironmentWestern Sydney University Penrith Australia
| | - Richard D. Bardgett
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
| | - Elizabeth M. Baggs
- Royal (Dick) School of Veterinary StudiesUniversity of Edinburgh Midlothian UK
| | - David Johnson
- School of Earth and Environmental SciencesThe University of Manchester Manchester UK
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12
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Tamura M, Suseela V, Simpson M, Powell B, Tharayil N. Plant litter chemistry alters the content and composition of organic carbon associated with soil mineral and aggregate fractions in invaded ecosystems. GLOBAL CHANGE BIOLOGY 2017; 23:4002-4018. [PMID: 28480539 DOI: 10.1111/gcb.13751] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 03/08/2017] [Accepted: 03/10/2017] [Indexed: 06/07/2023]
Abstract
Through the input of disproportionate quantities of chemically distinct litter, invasive plants may potentially influence the fate of organic matter associated with soil mineral and aggregate fractions in some of the ecosystems they invade. Although context dependent, these native ecosystems subjected to prolonged invasion by exotic plants may be instrumental in distinguishing the role of plant-microbe-mineral interactions from the broader edaphic and climatic influences on the formation of soil organic matter (SOM). We hypothesized that the soils subjected to prolonged invasion by an exotic plant that input recalcitrant litter (Japanese knotweed, Polygonum cuspidatum) would have a greater proportion of plant-derived carbon (C) in the aggregate fractions, as compared with that in adjacent soil inhabited by native vegetation that input labile litter, whereas the soils under an invader that input labile litter (kudzu, Pueraria lobata) would have a greater proportion of microbial-derived C in the silt-clay fraction, as compared with that in adjacent soils that receive recalcitrant litter. At the knotweed site, the higher C content in soils under P. cuspidatum, compared with noninvaded soils inhabited by grasses and forbs, was limited to the macroaggregate fraction, which was abundant in plant biomarkers. The noninvaded soils at this site had a higher abundance of lignins in mineral and microaggregate fractions and suberin in the macroaggregate fraction, partly because of the greater root density of the native species, which might have had an overriding influence on the chemistry of the above-ground litter input. At the kudzu site, soils under P. lobata had lower C content across all size fractions at a 0-5 cm soil depth despite receiving similar amounts of Pinus litter. Contrary to our prediction, the noninvaded soils receiving recalcitrant Pinus litter had a similar abundance of plant biomarkers across both mineral and aggregate fractions, potentially because of the higher surface area of soil minerals at this site. The plant biomarkers were lower in the aggregate fractions of the P. lobata-invaded soils, compared with noninvaded pine stands, potentially suggesting a microbial co-metabolism of pine-derived compounds. These results highlight the complex interactions among litter chemistry, soil biota, and minerals in mediating soil C storage in unmanaged ecosystems; these interactions are particularly important under global changes that may alter plant species composition and hence the quantity and chemistry of litter inputs in terrestrial ecosystems.
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Affiliation(s)
- Mioko Tamura
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
| | - Vidya Suseela
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
| | - Myrna Simpson
- Department of Physical and Environmental Sciences, University of Toronto, Scarborough, Toronto, ON, Canada
| | - Brian Powell
- Department of Environmental Engineering and Earth Sciences, Clemson University, Clemson, SC, USA
| | - Nishanth Tharayil
- Department of Plant and Environmental Sciences, Clemson University, Clemson, SC, USA
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