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Antonelli F, Iafrate S, Tescari M, Giandomenico M, Kumbaric A, Bartolini M. The Hypogeous Roman Archeological Museum of Positano: Study of the Evolution of Biological Threaten and Development of Adequate Control Protocols. Microorganisms 2024; 12:1520. [PMID: 39203363 PMCID: PMC11356633 DOI: 10.3390/microorganisms12081520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2024] [Revised: 07/13/2024] [Accepted: 07/19/2024] [Indexed: 09/03/2024] Open
Abstract
Hypogea are natural or artificial spaces located underground often of great interest from an anthropological, archeological, religious, artistic, or historic point of view. Due to their features, these environments usually present conservative problems and biological colonization could be considered as one of the main threats. The present three-year study was carried out by specialists of the Central Institute for Restoration of Rome (ICR) in the hypogeous site preserved in the Roman Archeological Museum of Positano (Positano MAR) and focused on characterizing biological alterations present on the mural paintings; setting up efficient strategies and protocols for biodeterioration control; and monitoring the efficacy of direct and indirect interventions. Patinas with different morphologies were analyzed through microscopic observations, cultural analyses and next-generation sequencing. The results proved that the alterations comprised a great variety of microorganisms forming very distinct communities, differently distributed over space and time. The main taxa represented were bacteria of phyla Pseudomonadota and Actinomycetota, fungi belonging to the genus Fusarium and Gliocladium, and algae of the genus Chlorococcum. Preservation protocols were set up considering the alterations' composition and included the application of biocides, limiting daily temperature changes, decreasing illuminance values on painted surfaces, and the screening of natural light sources.
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Affiliation(s)
- Federica Antonelli
- Biology Laboratory, Central Institute for Restoration, Via di San Michele 25, 00153 Rome, Italy; (A.K.); (M.B.)
- Bio.Co.Ré. Lab, Via Reatina, 10, 67068 Scurcola Marsicana, Italy
| | - Sara Iafrate
- Mural Paintings Laboratory, Central Institute for Restoration, Via di San Michele 25, 00153 Rome, Italy; (S.I.); (M.G.)
| | - Marco Tescari
- Biology Laboratory, Central Institute for Restoration, Support Staff Ales S.p.A., Via di San Michele 25, 00153 Rome, Italy;
| | - Manuel Giandomenico
- Mural Paintings Laboratory, Central Institute for Restoration, Via di San Michele 25, 00153 Rome, Italy; (S.I.); (M.G.)
- Department of Science of Antiquities, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Alma Kumbaric
- Biology Laboratory, Central Institute for Restoration, Via di San Michele 25, 00153 Rome, Italy; (A.K.); (M.B.)
- Department of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Marco Bartolini
- Biology Laboratory, Central Institute for Restoration, Via di San Michele 25, 00153 Rome, Italy; (A.K.); (M.B.)
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Isola D, Lee HJ, Chung YJ, Zucconi L, Pelosi C. Once upon a Time, There Was a Piece of Wood: Present Knowledge and Future Perspectives in Fungal Deterioration of Wooden Cultural Heritage in Terrestrial Ecosystems and Diagnostic Tools. J Fungi (Basel) 2024; 10:366. [PMID: 38786721 PMCID: PMC11122135 DOI: 10.3390/jof10050366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/22/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024] Open
Abstract
Wooden Cultural Heritage (WCH) represents a significant portion of the world's historical and artistic heritage, consisting of immovable and movable artefacts. Despite the expertise developed since ancient times to enhance its durability, wooden artefacts are inevitably prone to degradation. Fungi play a pivotal role in the deterioration of WCH in terrestrial ecosystems, accelerating its decay and leading to alterations in color and strength. Reviewing the literature of the last 25 years, we aimed to provide a comprehensive overview of fungal diversity affecting WCH, the biochemical processes involved in wood decay, and the diagnostic tools available for fungal identification and damage evaluation. Climatic conditions influence the occurrence of fungal species in threatened WCH, characterized by a prevalence of wood-rot fungi (e.g., Serpula lacrymans, Coniophora puteana) in architectural heritage in temperate and continental climates and Ascomycota in indoor and harsh environments. More efforts are needed to address the knowledge fragmentation concerning biodiversity, the biology of the fungi involved, and succession in the degradative process, which is frequently centered solely on the main actors. Multidisciplinary collaboration among engineers, restorers, and life sciences scientists is vital for tackling the challenges posed by climate change with increased awareness. Traditional microbiology and culture collections are fundamental in laying solid foundations for a more comprehensive interpretation of big data.
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Affiliation(s)
- Daniela Isola
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
| | - Hyun-Ju Lee
- Institute of Preventive Conservation for Cultural Heritage, Korea National University of Cultural Heritage, Buyeo 33115, Republic of Korea;
| | - Yong-Jae Chung
- Department of Heritage Conservation and Restoration, Graduate School of Cultural Heritage, Korea National University of Cultural Heritage, Buyeo 33115, Republic of Korea;
| | - Laura Zucconi
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
| | - Claudia Pelosi
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell’Università Snc, 01100 Viterbo, Italy;
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Martin-Pozas T, Nováková A, Jurado V, Cuezva S, Fernandez-Cortes A, Saiz-Jimenez C, Sanchez-Moral S. A Second Fungal Outbreak in Castañar Cave, Spain, Discloses the Fragility of Subsurface Ecosystems. MICROBIAL ECOLOGY 2024; 87:53. [PMID: 38507071 PMCID: PMC10954929 DOI: 10.1007/s00248-024-02367-2] [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: 01/05/2024] [Accepted: 03/13/2024] [Indexed: 03/22/2024]
Abstract
Castañar is a cave with strict visitor control measures since it was open to public visits in 2003. However, in recent years, the cave suffered two fungal outbreaks, the first in 2008 and controlled by cleaning the contaminated sediments and subsequent closure of the cave until 2014. The cave was reopened but limited to a maximum of 450 visitors/year. Despite these restrictions on visit, the cave experienced a second outbreak in 2021, originating from the installation of a steel grating walkway, aiming at protecting the ground sediments from the visitors' footsteps. Here, we conducted an analysis using Next-Generation Sequencing and culture-dependent techniques to investigate the fungal communities related to the second outbreak and compare with those present before the cave suffered the outbreak. The results show that the most abundant fungi involved in the 2021 outbreak were already detected in 2020, and even in 2008 and 2009, although the main species that originating both outbreaks were different, likely due to the different carbon sources introduced into the cave.
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Affiliation(s)
- Tamara Martin-Pozas
- Museo Nacional de Ciencias Naturales, MNCN-CSIC, 28006, Madrid, Spain
- Departamento de Biologia y Geologia, Universidad de Almeria, 04120, Almeria, Spain
| | - Alena Nováková
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the CAS, Prague, Czech Republic
| | - Valme Jurado
- Instituto de Recursos Naturales y Agrobiologia, IRNAS-CSIC, 41012, Seville, Spain
| | - Soledad Cuezva
- Spanish Geological Survey, IGME-CSIC, 28003, Madrid, Spain
| | | | - Cesareo Saiz-Jimenez
- Instituto de Recursos Naturales y Agrobiologia, IRNAS-CSIC, 41012, Seville, Spain.
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Toreno G, Zucconi L, Caneva G, Meloni P, Isola D. Recolonization dynamics of marble monuments after cleaning treatments: A nine-year follow-up study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169350. [PMID: 38103606 DOI: 10.1016/j.scitotenv.2023.169350] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/07/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
The prevention and control of biological patinas on outdoor stone monuments represent a demanding challenge for the conservation of cultural heritage also due to some microorganisms, particularly resistant to treatments, such as black meristematic fungi, an eco-physiological group well known for its tolerance to extreme conditions. Even if several methods and eco-friendly products have been proposed as new alternatives, traditional biocides are still far from being completely replaced. Recolonization is a natural process that occurs sooner or later after cleaning. The time that elapses until its occurrence can vary considerably depending on environmental conditions and the used products; unfortunately, the papers describing the effect of treatments over time are rare. This work aims to shed light on the recolonization process of marble surfaces in the ancient monumental cemetery of Bonaria (Cagliari) after nine years from treatments, evaluating the long-term efficiency of two different cleaning methods, namely dimethyl sulfoxide-based gel (DMSO-based gel) and Biotin T (a didecyldimethylammonium chloride-based product-). In this context, the microflora present before treatments and in the following years was assessed by culture-based methods and identified by molecular techniques, with attention on black meristematic fungi, which were used as reference for the most resistant lithobiontic organisms. Different environmental parameters, such as temperature, exposition, dominant winds, and rainfall, were considered, and infrared thermography, portable light microscopy, and image analysis were used. This research evidenced the influence of water availability and lightning in recolonization processes, the transition from the pioneer fungal community versus more resistant black fungal species after Biotin T treatment, and the long-lasting efficiency of the DMSO-based gel. These findings prove that this low-impact method deserves more attention in the conservation of outdoor marble monuments, emphasizing the importance of long-term studies.
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Affiliation(s)
- Georgia Toreno
- Superintendency of Archaeology, Fine Arts and Landscape for the metropolitan city of Cagliari and the Provinces of Oristano and South Sardinia, Italy.
| | - Laura Zucconi
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy.
| | - Giulia Caneva
- Department of Sciences, Roma Tre University, 00146 Rome, Italy.
| | - Paola Meloni
- Department of Mechanical, Chemical and Materials Engineering (DIMCM), University of Cagliari, 09123 Cagliari, Italy; Laboratorio Colle di Bonaria, University of Cagliari, 09125 Cagliari, Italy.
| | - Daniela Isola
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, 01100 Viterbo, Italy.
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Liu J, Wu F, Xiang T, Ma W, He D, Zhang Q, Wang W, Duan Y, Tian T, Feng H. Differences of airborne and mural microorganisms in a 1,500-year-old Xu Xianxiu's Tomb, Taiyuan, China. Front Microbiol 2023; 14:1253461. [PMID: 37954248 PMCID: PMC10635417 DOI: 10.3389/fmicb.2023.1253461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 10/03/2023] [Indexed: 11/14/2023] Open
Abstract
Background Microbial colonization represents one of the main threats to the conservation of subterranean cultural heritage sites. Recently, the microbial colonization on murals in tombs has gradually attracted attention. Methods In this study, a total of 33 samples, including 27 aerosol samples and 6 mural painting samples, were collected from different sites of Xu Xianxiu's Tomb and analyzed using culture-dependent methods. We compared the diversities of culturable bacteria and fungi isolated from the air and murals and explored the potential impacts of microorganisms on the biodeterioration of the murals. Results Phylogenetic analyses revealed that the culturable bacteria belonged to Bacillus, Microbacterium, Lysobacter and Arthrobacter. And the most of fungal belonged to the Penicillium, Cladosporium and Aspergillus genera. The composition and structure of airborne bacteria and fungi outside the tomb were both significantly different from that inside the tomb. The variation trends of airborne bacterial and fungal concentrations at different sampling sites were remarkably similar. Bacillus frigoritolerans, Bacillus halotolerans, Bacillus safensis, Exiguobacterium mexicanum, Microbacterium trichothecenolyticum, and Micrococcus yunnanensis were bacterial species commonly isolated from both the mural and air environments. Fungal species commonly isolated from aerosol samples and mural painting samples were Alternaria alternata, Cladosporium cladosporioides, Penicillium brevicompactum, and Peyronellaea glomerata. The prediction of the ecological functions of the bacteria revealed that chemoheterotrophy or aerobic_chemoheterotrophy accounted for substantial relative proportions in all sample types. Conclusion These results suggest that the aerosol circulation between the inside and outside environments of the tomb was weak and that the outside environment had yet to have an impact on the air microbial community inside the tomb. Selective colonization of microorganisms, which is mediated by interaction between microorganisms and special microenvironmental factors, is an important reason for the biodeterioration of murals.
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Affiliation(s)
- Jiangyun Liu
- School of Public Health, Lanzhou University, Lanzhou, Gansu, China
| | - Fasi Wu
- National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Department of Conservation Research, Dunhuang Academy, Dunhuang, Gansu, China
- Gansu Provincial Research Center for Conservation of Dunhuang Cultural Heritage, Dunhuang, Gansu, China
| | - Ting Xiang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, Centre for Grassland Microbiome, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
| | - Wenxia Ma
- MOE Key Laboratory of Cell Activities and Stress Adaptations, Centre for Grassland Microbiome, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
| | - Dongpeng He
- National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Department of Conservation Research, Dunhuang Academy, Dunhuang, Gansu, China
- Gansu Provincial Research Center for Conservation of Dunhuang Cultural Heritage, Dunhuang, Gansu, China
| | - Qi Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, Centre for Grassland Microbiome, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
| | - Wanfu Wang
- National Research Center for Conservation of Ancient Wall Paintings and Earthen Sites, Department of Conservation Research, Dunhuang Academy, Dunhuang, Gansu, China
- Gansu Provincial Research Center for Conservation of Dunhuang Cultural Heritage, Dunhuang, Gansu, China
| | - Yulong Duan
- Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu, China
| | - Tian Tian
- School of Public Health, Lanzhou University, Lanzhou, Gansu, China
| | - Huyuan Feng
- MOE Key Laboratory of Cell Activities and Stress Adaptations, Centre for Grassland Microbiome, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
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Isola D, Bartoli F, Morretta S, Caneva G. The Roman Houses of the Caelian Hill (Rome, Italy): Multitemporal Evaluation of Biodeterioration Patterns. Microorganisms 2023; 11:1770. [PMID: 37512942 PMCID: PMC10384389 DOI: 10.3390/microorganisms11071770] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Like other hypogeal environments, the Roman Houses of the Caelian Hill are prone to unwanted biological growth. Wide conservative interventions have been carried out at the beginning of this millenium to reduce biodeterioration and physical-chemical damages. Retracing the last monitoring work, we assessed the site's current state of conservation and biodeterioration intending to check the previous treatments' effectiveness and deepen the common knowledge of the subterranean biota and their possible biodeteriogenic effects. Starting from the past test areas and the previous identifications of the occurring biodeteriogens, we further isolated and identified the main eubacterial, fungal, and phototrophic settlers, focusing on some detrimental traits for wall paintings (i.e., acid production and carbonate precipitation). The achieved results proved the success of the performed interventions in reducing the wall's water content. Otherwise, the new conditions raise, in the long term, new concerns about lampenflora, carbonate precipitations, and salt efflorescence. Here, the Caelian Houses' new status is documented. The possible favouring conditions for the different groups of biodeteriogens, along with the taxonomical novelties, additional risks tied to the anthropization of the resident culturable microbial community, and the possible relation between the black fungus Cyphellophora olivacea and roots, are reported and discussed.
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Affiliation(s)
- Daniela Isola
- Department of Sciences, University Roma Tre, Viale Marconi 446, 00146 Rome, Italy
- Department of Economics, Engineering, Society and Business Organization (DEIM), University of Tuscia, Largo dell'Università snc, 01100 Viterbo, Italy
| | - Flavia Bartoli
- Department of Sciences, University Roma Tre, Viale Marconi 446, 00146 Rome, Italy
- National Research Center (CNR), Institute of Heritage Science, SP35d, 9, 00010 Montelibretti, Italy
| | - Simona Morretta
- Soprintendenza Speciale di Roma Archeologia Belle Arti Paesaggio, Ministero della Cultura, Piazza dei Cinquecento, 67, 00185 Rome, Italy
| | - Giulia Caneva
- Department of Sciences, University Roma Tre, Viale Marconi 446, 00146 Rome, Italy
- National Biodiversity Future Center (NBFC), Università di Palermo, Piazza Marina 61, 90133 Palermo, Italy
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Xia C, Liu D, Kong Z, Xie H, Mu B, Hokoi S, Li Y. Spatial and temporal changes in microclimate affect disease distribution in two ancient tombs of Southern Tang Dynasty. Heliyon 2023; 9:e18054. [PMID: 37496896 PMCID: PMC10366430 DOI: 10.1016/j.heliyon.2023.e18054] [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: 12/23/2022] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/28/2023] Open
Abstract
Two tombs of the Southern Tang Dynasty (Qinling Tomb and Shunling Tomb), the most important cultural heritages in China, were built for emperors 1000 years ago and decorated with murals and stone sculptures. After their excavation in the 1950s, it was found that drastic fluctuations in the environment within the tombs had caused multiple diseases, such as salt efflorescence, powdering, and biodeterioration, which led to irreversible damage to the murals. This research comprised long-term (yearly) environmental monitoring and short-term (monthly) investigation into the distribution of salt crystallization and microbial growth within the two tombs. The objective was to unveil the relationship between the temporal and spatial distributions of the mural diseases and environmental characteristics while proposing a promising environmental regulation strategy for relic conservation. The results showed a gradual reduction in temperature fluctuation from the entrance to the back chamber and a distinct vertical stratification in relative humidity. The relative humidity in the upper areas of the tombs reached 100% during summer, while it averaged around 40-50% in the lower areas during winter. Consequently, significant condensation was observed on the ceiling in summer, whereas salt crystallization occurred on the murals in the lower space in winter. The distribution of these diseases was influenced by the airflow exchange between the interior and exterior. Furthermore, the structural disparities between the two tombs contributed to higher relative humidity and greater microorganism coverage in the Shunling Tomb compared to the Qinling Tomb. From the abovementioned findings, we suggest that microclimate control is essential for mitigating mural deterioration and should be paid more attention in the future.
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Affiliation(s)
- Changchang Xia
- School of Architecture, Southeast University, Nanjing, China
| | - Diandian Liu
- School of Architecture, Southeast University, Nanjing, China
| | - Zhenyi Kong
- School of Architecture, Southeast University, Nanjing, China
| | - Huarong Xie
- School of Architecture, Southeast University, Nanjing, China
| | - Baogang Mu
- School of Civil Engineering, Southeast University, Nanjing, China
| | - Shuichi Hokoi
- Architecture Internationalization Demonstration School of Southeast University, Nanjing, China
| | - Yonghui Li
- School of Architecture, Southeast University, Nanjing, China
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Rizk SM, Magdy M, De Leo F, Werner O, Rashed MAS, Ros RM, Urzì C. Culturable and unculturable potential heterotrophic microbiological threats to the oldest pyramids of the Memphis necropolis, Egypt. Front Microbiol 2023; 14:1167083. [PMID: 37275160 PMCID: PMC10232867 DOI: 10.3389/fmicb.2023.1167083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/27/2023] [Indexed: 06/07/2023] Open
Abstract
A large percentage of the world's tangible cultural heritage is made from stone; thus, it deteriorates due to physical, chemical, and/or biological factors. The current study explored the microbial community inhabiting two prehistoric sites with high cultural value in the Memphis necropolis of Egypt (Djoser and Lahun Pyramids) using amplicon-based metabarcoding and culture-dependent isolation methods. Samples were examined by epifluorescent microscopy for biological signs before environmental DNA extraction and in vitro cultivation. The metabarcoding analysis identified 644 bacterial species (452 genera) using the 16S rRNA and 204 fungal species (146 genera) using ITS. In comparison with the isolation approach, an additional 28 bacterial species (13 genera) and 34 fungal species (20 genera) were identified. A total of 19 bacterial and 16 fungal species were exclusively culture-dependent, while 92 bacterial and 122 fungal species were culture-independent. The most abundant stone-inhabiting bacteria in the current study were Blastococcus aggregatus, Blastococcus saxobsidens, and Blastococcus sp., among others. The most abundant rock-inhabiting fungi were Knufia karalitana and Pseudotaeniolina globosa, besides abundant unknown Sporormiaceae species. Based on previous reports, microorganisms associated with biodeterioration were detected on color-altered sites at both pyramids. These microorganisms are potentially dangerous as physical and chemical deterioration factors and require proper conservation plans from a microbiological perspective.
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Affiliation(s)
- Samah Mohamed Rizk
- Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Mahmoud Magdy
- Genetics Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Filomena De Leo
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Messina, Italy
| | - Olaf Werner
- Department of Plant Biology, Faculty of Biology, Murcia University, Murcia, Spain
| | | | - Rosa M. Ros
- Department of Plant Biology, Faculty of Biology, Murcia University, Murcia, Spain
| | - Clara Urzì
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Messina, Italy
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Wang Y, Wu X. Current progress on murals: distribution, conservation and utilization. HERITAGE SCIENCE 2023; 11:61. [PMID: 37008593 PMCID: PMC10040258 DOI: 10.1186/s40494-023-00904-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 03/06/2023] [Indexed: 06/19/2023]
Abstract
As non-renewable cultural heritages, murals have important implications in historical customs, religions, and philosophy as well as their aesthetic values. Recently, many murals are threatened by natural factors and human activities. During the past decades, there are increasing interest in the investigation of murals. Here we review the current status of murals and provide an up-to-date summary of achievements related to murals. The murals that draw the most attention are distributed in Mexico, Ireland, China, and Spain. The aesthetics, history, cultural, educational, and economic values of murals are comprehensively analyzed. The main research technologies used to detect the chemical compositions and physical structures of murals are also summarized. The restoration of murals includes several procedures such as stabilization, repair, surface cleaning, and pigment reconversion. Emerging technologies such as computer science benefit the research and conservation of murals. We also propose that tourism management and climate change should be incorporated into the conservation of murals in the future.
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Affiliation(s)
- Yihui Wang
- College of Fine Arts and Design, Lanzhou University of Arts and Science, 400 Yanbei Road, Lanzhou, 730000 China
| | - Xiaodong Wu
- Cryosphere Research Station on the Qinghai-Tibet Plateau, State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000 China
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10
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Geweely NS. New frontiers review of some recent conservation techniques of organic and inorganic archaeological artefacts against microbial deterioration. Front Microbiol 2023; 14:1146582. [PMID: 37007519 PMCID: PMC10060858 DOI: 10.3389/fmicb.2023.1146582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/13/2023] [Indexed: 03/18/2023] Open
Abstract
The information on the advances and technology of some recent conservation methods (2020–2023) of organic and inorganic archaeological objects against microbial deterioration is recorded. An outline of comparative new protective methods for conserving plant-origin organic artefacts {Fibers (manuscripts, textile) and wood}, animal-origin organic artefacts (painting, parchment and mummies) and inorganic stone artefacts were investigated. The work not only contributes to the development of safe revolutionary ways for more efficient safe conservation of items of historical and cultural worth but also serves as a significant diagnostic signature for detecting the sorts of microbial identification and incidents in antiques. Biological technologies (environmentally friendly green biocides) are the most used recent, efficient and safe strategy acceptable as alternatives to stop microbial deterioration and prevent any potential interactions between the biological agent and the artefacts. Also, a synergistic effect of combining natural biocides with mechanical cleaning or chemical treatments was suggested. The recommended exploration techniques should be considered for future applications.
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Iafrate S, Sidoti G, Capasso FE, Giandomenico M, Muca S, Daniele V, Taglieri G. New Perspectives for the Consolidation of Mural Paintings in Hypogea with an Innovative Aqueous Nanolime Dispersion, Characterized by Compatible, Sustainable, and Eco-Friendly Features. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13020317. [PMID: 36678070 PMCID: PMC9863436 DOI: 10.3390/nano13020317] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/03/2023] [Accepted: 01/10/2023] [Indexed: 05/27/2023]
Abstract
Consolidation of mural paintings in hypogea is challenging because of their severe microclimatic conditions, characterized by high humidity levels, low air circulation, the presence of salts efflorescence, and the detrimental growth of biodeteriogen agents. Traditional consolidant products show significant drawbacks when used in hypogeum. Organic compounds, such as acrylic emulsions, are bio-receptive and some inorganic consolidants, such as silica-based products, show a lack of compatibility with the original substrate, which could lead to a reduction in permeability and an increase in the mechanical resistance of the external layer. The presence of solvents in their formulations, particularly short-chain alcohols that can activate germination of fungal spores, leads to the release of great amounts of volatile organic compounds, which are particularly harmful in the hypogeic environment. To solve these problems, restorers of the Istituto Centrale per il Restauro (ICR) decided to use a new aqueous nanolime dispersion, NANOLAQ, consisting of pure and crystalline Ca(OH)2 nanoparticles dispersed in water, produced by an innovative and sustainable patented procedure. After laboratory testing, the product has been applied on site, on a medieval mural painting in the Ss. Peter and Paul hypogeum in the UNESCO site of Matera (Italy), monitoring the performance in terms of cohesion of the paint layer and preservation of aesthetic features.
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Affiliation(s)
- Sara Iafrate
- Istituto Centrale per il Restauro Ministero della Cultura (ICR), Via di San Michele 25, 00153 Roma, Italy
| | - Giancarlo Sidoti
- Istituto Centrale per il Restauro Ministero della Cultura (ICR), Via di San Michele 25, 00153 Roma, Italy
| | - Filippo Edoardo Capasso
- Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy
| | - Manuel Giandomenico
- Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy
| | - Sokol Muca
- Restorer and Conservator of Cultural Heritage, Sokol Muca, Via Giuseppe Verdi 5, 13100 Vercelli, Italy
| | - Valeria Daniele
- Department of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale E. Pontieri 1, 67100 Monteluco di Roio, L’Aquila, Italy
| | - Giuliana Taglieri
- Department of Industrial and Information Engineering and Economics, University of L’Aquila, Piazzale E. Pontieri 1, 67100 Monteluco di Roio, L’Aquila, Italy
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Isola D, Prigione VP, Zucconi L, Varese GC, Poli A, Turchetti B, Canini F. Knufia obscura sp. nov. and Knufia victoriae sp. nov., two new species from extreme environments. Int J Syst Evol Microbiol 2022; 72. [DOI: 10.1099/ijsem.0.005530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Six strains of black meristematic fungi were isolated from Antarctic soils, gasoline car tanks and from the marine alga Flabellia petiolata. These fungi were characterized by morphological, physiological and phylogenetic analyses. According to the maximum-likelihood analysis reconstructed with ITS and LSU sequences, these strains belonged to the genus Knufia. Knufia obscura sp. nov. (holotype CBS 148926) and Knufia victoriae sp. nov. (holotype CBS 149015) are proposed as two novel species and descriptions of their morphological, physiological and phylogenetic features are presented. Based on the maximum-likelihood analyses, K. obscura was closely related to Knufia hypolithi (99 % bootstrap support), while K. victoriae clustered in the clade of Knufia cryptophialidica and Knufia perfecta (93 % bootstrap support). Knufia victoriae, recorded in Antarctic soil samples, had a psychrophilic behaviour, with optimal growth between 10 and 15 °C and no growth recorded at 20 °C. Knufia obscura, from a gasoline car tank and algae, displayed optimal growth between 20 and 25 °C and was more tolerant to salinity than K. victoriae.
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Affiliation(s)
- Daniela Isola
- Department of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università, Viterbo 01100, Italy
| | - Valeria Paola Prigione
- Department of Life Sciences and Systems Biology, Mycotheca Universitatis Taurinensis, University of Torino, Viale Mattioli 25, 10125, Torino, Italy
| | - Laura Zucconi
- Department of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università, Viterbo 01100, Italy
| | - Giovanna Cristina Varese
- Department of Life Sciences and Systems Biology, Mycotheca Universitatis Taurinensis, University of Torino, Viale Mattioli 25, 10125, Torino, Italy
| | - Anna Poli
- Department of Life Sciences and Systems Biology, Mycotheca Universitatis Taurinensis, University of Torino, Viale Mattioli 25, 10125, Torino, Italy
| | - Benedetta Turchetti
- Department of Agricultural, Food and Environmental Sciences, Industrial Yeasts Collection DBVPG, University of Perugia, Borgo XX Giugno, 74, 06121, Perugia, Italy
| | - Fabiana Canini
- Department of Ecological and Biological Sciences, University of Tuscia, Largo dell’Università, Viterbo 01100, Italy
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Trovão J, Soares F, Paiva DS, Tiago I, Portugal A. Circumfusicillium cavernae gen. et sp. nov. (Bionectriaceae, Hypocreales) Isolated from a Hypogean Roman Cryptoporticus. J Fungi (Basel) 2022; 8:jof8080837. [PMID: 36012824 PMCID: PMC9410200 DOI: 10.3390/jof8080837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 12/21/2022] Open
Abstract
Stone monuments and relics are prone to biodeterioration processes prompted by microbial proliferation and activity. Among the distinct microbes capable of stone colonization, fungi are known to strongly contribute to stone biodeterioration. During the ongoing efforts aiming to study fungi thriving in dolomitic limestone walls of the Coimbra’s hypogean Roman cryptoporticus (Portugal), two unknown Bionectriaceae isolates were retrieved. The aim of this work was to depict the molecular and phenotypic characteristics of these microorganisms. The phylogenetic analyses revealed that the studied strains could not be assigned to any of the currently known Bionectriaceae genera. Moreover, the isolates exhibited distinctive and peculiar characteristics, such as the packing of conidia by surrounding hyphal segments and the formation of rope-like microsclerotia with a textura globose. Taking into account all the data obtained, a novel genus and species, Circumfusicillium cavernae gen. et sp. nov. in Bionectriaceae (Hypocreales), is proposed here.
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Affiliation(s)
- João Trovão
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
- Correspondence:
| | - Fabiana Soares
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Diana Sofia Paiva
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - Igor Tiago
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - António Portugal
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
- Fitolab-Laboratory for Phytopathology, Instituto Pedro Nunes, 3030-199 Coimbra, Portugal
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The Susceptibility to Biodegradation of Some Consolidants Used in the Restoration of Mural Paintings. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12147229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study evaluated both the possible fungal metabolites involved in the degradation of the commercial consolidant known as Paraloid® B72 and the national artisanal consolidant named transparent dispersion of casein and the deteriorative potential of melanised fungi. Fungi were found to have the capacity to produce organic acids, proteases and esterases when they grow on consolidants, which can be used as nutrients. Mycelia produced by melanised fungi affected the appearance, as well as the integrity, of consolidants applied on painted experimental models and fragments of frescoes. In treatment trials with biocides (Biotin R®, Biotin T® and Preventol® RI 80), the morphology of the consolidants, as well as the vitality of the fungi, were assessed 30 days after the inoculation with melanic fungi. Direct observation, optical microscopy, colourimetry and microbiological analysis highlighted the degradation of the consolidants by fungi and their acquired resistance after biocidal treatments. Biotin R® applied by brushing on the surface of the consolidants proved to be the most effective treatment, followed by Biotin T®. Considering the overall results for both Paraloid® B72 and transparent dispersion of casein, use of Biotin R® applied by brushing is recommended for preventive conservation.
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Fungi Affecting Wall Paintings of Historical Value: A Worldwide Meta-Analysis of Their Detected Diversity. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12062988] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Wall paintings have been a cultural expression of human creativity throughout history. Their degradation or destruction represents a loss to the world’s cultural heritage, and fungi have been identified as a major contributor to their decay. We provide a critical review of fungi isolated from worldwide wall paintings between 1961–2021. One-hundred three scientific papers were reviewed focusing on fungal diversity, isolation protocols, and spatial distribution of data. The study sites were grouped into five environmental categories on the basis of the expected major microclimatic conditions (temperature, relative humidity, ventilation), and the possible relationship with the species found was investigated. The highest number of records were localized in Europe, with 38 sites on a total of 74, 20 of which were from Italy. A total of 378 fungal entries were obtained, consisting of 1209 records, belonging to 260 different species and 173 genera. The accuracy level in taxa determination was highly variable among different papers analyzed. Data showed a dominance of Ascomycota, mainly of orders Eurotiales and Hypocreales probably due to their wide distribution and easily air dispersed spores and due to the possible pitfalls linked to the isolation methods, favoring rapidly growing taxa. Statistical analyses revealed that fungal communities were not strictly linked to environmental categories with different ventilation, temperature, and humidity. Such findings may be due to the wide geographical area, the wide heterogeneity of the data, and/or the absence of standardized sampling and analyses protocols. They could also be the result of the dominance of some prevailing factors in the various sites that mask the influence one of each other.
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Black Fungi and Stone Heritage Conservation: Ecological and Metabolic Assays for Evaluating Colonization Potential and Responses to Traditional Biocides. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12042038] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Identifying species involved in biodeterioration processes is helpful, however further effort is needed to assess their ecological requirements and actual activity. Black fungi (BF) represent one of the most underestimated threats to stone cultural heritage in the Mediterranean basin; they are difficult to kill or remove due to their ability to grow inside the rock and cope with several stresses. Despite this, little is known about BF and factors favoring their growth on stone surfaces. Eighteen BF species were here investigated for temperature and salt tolerance, and metabolic traits by plate assays. The relation between some highly damaged monuments and their BF settlers was assessed using X-ray diffraction analysis, mercury intrusion porosimetry, and SEM. The sensitiveness to four commonly used traditional biocides was also tested. All strains were able to grow within the range of 5–25 °C and in the presence of 3.5% NaCl. Instrumental analyses were fundamental in discovering the relation between halophilic strains and weathered marble sculptures. The acid, cellulase, esterase, and protease production recorded proved BF’s potential to produce a chemical action on carbonate stones and likely affect other materials/historical artefacts. Besides, the use of carboxymethylcellulose and Tween 20 should be evaluated in restoration practice to prevent tertiary bioreceptivity. Agar diffusion tests helped identify the most resistant species to biocides, opening the perspective of its use as reference organisms in material testing procedures.
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Editorial for the Special Issue “Microbial Communities in Cultural Heritage and Their Control”. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app112311411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This editorial focuses on the studies published within the present Special Issue presenting advances in the field of biodeterioration of cultural heritage caused by microbial communities with a particular focus on new methods for their elimination and control.
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Biodeterioration of Salón de Reinos, Museo Nacional del Prado, Madrid, Spain. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11198858] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The Salón de Reinos, a remnant of the 17th century Palacio del Buen Retiro, was built as a recreational residence under the reign of Felipe IV between 1632 and 1640 and was the main room for the monarch’s receptions. This Salón owes its name to the fact that the coats of arms (shields) of the 24 kingdoms that formed Spain in Felipe IV’s time were painted on the vault, above the windows. In addition, the ceiling shows an original decorative composition. The painted ceiling and window vaults showed deterioration evidenced by fissures, water filtration, detachments of the paint layer, and black stains denoting fungal colonization related to humidity. Ten strains of bacteria and 14 strains of fungi were isolated from the deteriorated paintings. Their biodeteriorative profiles were detected through plate assays. The most frequent metabolic functions were proteolytic and lipolytic activities. Other activities, such as the solubilization of gypsum and calcite and the production of acids, were infrequent among the isolates.
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Isola D, Bartoli F, Langone S, Ceschin S, Zucconi L, Caneva G. Plant DNA Barcode as a Tool for Root Identification in Hypogea: The Case of the Etruscan Tombs of Tarquinia (Central Italy). PLANTS (BASEL, SWITZERLAND) 2021; 10:1138. [PMID: 34205139 PMCID: PMC8228792 DOI: 10.3390/plants10061138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/30/2021] [Accepted: 06/01/2021] [Indexed: 11/21/2022]
Abstract
Roots can produce mechanical and chemical alterations to building structures, especially in the case of underground historical artifacts. In archaeological sites, where vegetation plays the dual role of naturalistic relevance and potential threat, trees and bushes are under supervision. No customized measures can be taken against herbaceous plants lacking fast and reliable root identification methods that are useful to assess their dangerousness. In this study, we aimed to test the efficacy of DNA barcoding in identifying plant rootlets threatening the Etruscan tombs of the Necropolis of Tarquinia. As DNA barcode markers, we selected two sections of the genes rbcL and matK, the nuclear ribosomal internal transcribed spacer (nrITS), and the intergenic spacer psbA-trnH. All fourteen root samples were successfully sequenced and identified at species (92.9%) and genus level (7.01%) by GenBank matching and reference dataset implementation. Some eudicotyledons with taproots, such as Echium italicum L., Foeniculum vulgare Mill., and Reseda lutea L. subsp. lutea, showed a certain recurrence. Further investigations are needed to confirm this promising result, increasing the number of roots and enlarging the reference dataset with attention to meso-Mediterranean perennial herbaceous species. The finding of herbaceous plants roots at more than 3 m deep confirms their potential risk and underlines the importance of vegetation planning, monitoring, and management on archaeological sites.
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Affiliation(s)
- Daniela Isola
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; (F.B.); (S.L.); (S.C.); (G.C.)
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy;
| | - Flavia Bartoli
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; (F.B.); (S.L.); (S.C.); (G.C.)
| | - Simone Langone
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; (F.B.); (S.L.); (S.C.); (G.C.)
| | - Simona Ceschin
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; (F.B.); (S.L.); (S.C.); (G.C.)
| | - Laura Zucconi
- Department of Ecological and Biological Sciences (DEB), University of Tuscia, 01100 Viterbo, Italy;
| | - Giulia Caneva
- Department of Sciences, Roma Tre University, 00146 Rome, Italy; (F.B.); (S.L.); (S.C.); (G.C.)
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Vegetation Cover and Tumuli’s Shape as Affecting Factors of Microclimate and Biodeterioration Risk for the Conservation of Etruscan Tombs (Tarquinia, Italy). SUSTAINABILITY 2021. [DOI: 10.3390/su13063393] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The conservation of underground tombs is affected by several physical-chemical and biological factors, which could be reduced by insulating systems able to maintain the microclimatic stability also decreasing the biodeterioration risk. In Mediterranean areas, wild ephemeral plants, which reduce their cover during the hot season, seem unsuitable for reducing summer overheating. In this study, we wish to assess the influence of vegetation cover and of overlaying soil, after the establishment of an evergreen turf of a cultivar of Cynodon dactylon, on two tombs in the Etruscan Necropolis of Monterozzi, covered by linear-shaped tumuli. Therefore, we evaluated for 10 months the thermo-hygrometric values of these tombs, together with two tombs as controls. We also evaluated the different tumuli’s morphologies and the related received solar radiation. Results confirmed that late summer and early autumn as critical microclimatic periods for the risk factors of hypogeal paintings when peaks of superficial temperature occur. A positive influence of vegetation cover on maintaining constant humidity and internal temperatures was detected, but the mounds orientation, as well as soil depth, seems to have a relevant role. Considering the naturalistic features of the area and the related cultural ecosystem services, a careful selection of wild plants is suggested.
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Cirigliano A, Mura F, Cecchini A, Tomassetti MC, Maras DF, Di Paola M, Meriggi N, Cavalieri D, Negri R, Quagliariello A, Hallsworth JE, Rinaldi T. Active microbial ecosystem in
Iron‐Age
tombs of the Etruscan civilization. Environ Microbiol 2020; 23:3957-3969. [DOI: 10.1111/1462-2920.15327] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Angela Cirigliano
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
| | - Francesco Mura
- CNIS – Center for Nanotechnology Applied to Industry of La Sapienza Sapienza University of Rome Rome Italy
| | - Adele Cecchini
- Associazione No Profit ‘Amici Delle Tombe Dipinte di Tarquinia’ Tarquinia Italy
| | | | - Daniele Federico Maras
- Soprintendenza Archeologia Belle Arti e Paesaggio per l'Area Metropolitana di Roma, la Provincia di Viterbo e l'Etruria Meridionale Ministero dei Beni e delle Attività Culturali e del Turismo Rome Italy
| | | | | | | | - Rodolfo Negri
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
| | - Andrea Quagliariello
- Department of Comparative Biomedicine and Food Science University of Padova Padova Italy
| | - John E. Hallsworth
- Institute for Global Food Security School of Biological Sciences, Queen's University Belfast Belfast UK
| | - Teresa Rinaldi
- Department of Biology and Biotechnology Sapienza University of Rome Rome Italy
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