Features of the restoration of Buddhist thangka

Цель статьи — познакомить реставраторов и исследователей с традиционными и современными методами реставрации буддийской живописи на холсте, c оборудованием и материалами, которые применяются в лаборатории научной реставрации восточной живописи Государственного Эрмитажа. Актуальность данной работы продиктована развитием реставрационной практики буддийской живописи в последние десятилетия. В исследовании показано, как появление новых высокотехнологичных материалов, оборудования и методов исследования памятников позволяет реставратору более эффективно работать с ними. Также в данной работе показаны результаты изучения и исследования двух тангка. Комплексное исследование тангка, проведенное силами специалистов научно-исследовательских лабораторий, позволило правильно выбрать методики реставрации. Кроме этого, в работе приводятся краткие исторические сведения об иконографии и технологии создания тангка. В статье проводится анализ реставрационных методик и их выбора, рассматриваются этические проблемы, связанные с допустимой степенью вмешательства в структуру памятника. На примере сравнения подходов к реставрации двух буддийских тангка, реставрированных в разные годы (тангка «Образ буддийский Дорджэ Лэкпа» в 2018 году и тангка «Махакала синий шестирукий, трехглазый, стоящий на слоне с человеческой фигурой» в 2021 году), описаны различные методики. Анализ проведенных реставрационных мероприятий включает в себя описание проведенных исследований памятников до реставрации и методов отчистки поверхности, укрепления красочного слоя, восполнения грунта, выравнивания основы и восполнения утрат красочного слоя. В статье показана практическая значимость и результативность применения различных материалов, оборудования и методов реставрации буддийской живописи. Обобщены результаты реставрации обоих памятников. The aim of the article is to acquaint restorers and researchers of Buddhist painting on canvas with traditional restoration methods combined with modern equipment and materials that are used in the Laboratory of Scientific Restoration of Oriental Painting of the State Hermitage Museum. The relevance of this work is dictated by the development restoration practice of Buddhist painting in recent decades. It is shown in the study how the emergence of new high-tech materials, equipment and methods of studying monuments allows the restorer to work with them more effectively. Also in this paper, the results of the study and study of two thangkas are shown. Comprehensive the thangka study conducted by the specialists of research laboratories made it possible to choose the right restoration techniques. In addition, a brief work of historical information about the iconography and technology of creating a thangka is provided. The restoration techniques and their choices are analyzed in the article. Also the ethical problems related to the permissible degree of interference in the structure of the monument are examined. Using the example of comparing approaches to the restoration of two Buddhist thangkas restored in different years: the “Dorje Lakpa Buddhist Image” thangka in 2018, and the “Mahakala blue, 6-handed, 3-eyed, standing on an elephant with a human figure” thangka in 2021, various techniques are described. The analysis of the restoration measures carried out includes a description of the studies carried out on the monuments before the restoration, and methods of cleaning the surface, strengthening the paint layer, replenishing the soil, leveling the base and replenishing the losses of the paint layer. The article shows the practical significance and effectiveness of the use of various materials, equipment and methods of restoration of Buddhist painting. In conclusion, the results of the restoration of both monuments are summarized.

Exploring Assembly Trajectories of Abandoned Grasslands in Response to 10 Years of Mowing in Sub-Mediterranean Context

Abandoned semi-natural grasslands are characterized by lower plant diversity as a consequence of tall grasses spreading. Mowing is a widely used restoration practice, but its effects to maintain the restored diversity over time is poorly investigated in sub-Mediterranean grasslands. Since 2010 in the central Apennines, we fenced a grassland, invaded by Brachypodium rupestre, which was mowed twice a year. Before the experiment started, we recorded species cover in 30 random sampling units (0.5 m × 0.5 m). The sampling was repeated every two years for a total of ten years. We used linear mixed-effect models to investigate the trajectory of functional diversity and community weighted mean for traits related to space occupation, resource exploitation, temporal niche exploitation, and Grime’s CSR strategies. The reduction of the weaker competitor exclusion exerted by B. rupestre affected the functional plant community. In the short term (4–6 years), this fostered space occupation strategies, decreasing convergence of clonal strategies and horizontal space occupation types. In the longer term (8–10 years), mowing filtered ruderal strategies, i.e., species with faster resource acquisition (lower leaf dry matter content, LDMC). LDMC and CSR strategies, initially convergent due to the dominance of B. rupestre, lowered convergence over time due to higher differentiation of strategies.

Sand-capping stabilizes muddy sediment and improves benthic light conditions in eutrophic estuaries: laboratory verification and the potential for recovery of eelgrass (Zostera marina)

Decades of eutrophication have increased water turbidity in Danish estuaries and led to light limitation of eelgrass (Zostera marina) growth. Former eelgrass areas are now denuded and consist of organic-rich muddy sediment with frequent resuspension events that maintain a high turbidity state. In addition, low anchoring capacity of eelgrass in the soft organic-rich sediments has contributed to eelgrass loss. When navigation channels in Danish estuaries are dredged, large amounts (~100.000 m3) of sandy sediment are shipped to remote dumping sites. Instead, we suggest that the dredged sand is used to consolidate adjacent muddy areas. We demonstrate in the present study that capping of fluid muddy sediment with 10 cm of sand is feasible without any vertical mixing and that this marine restoration approach can significantly lower the magnitude and frequency of resuspension events. Erosion of suspended solids change from 5 g m-2 min-1 in muddy areas to about 0.2 g m-2 min-1 in sand-capped areas, implying that sand-capping can significantly improve light conditions. Moreover, erosion thresholds increase from about 10-12 cm s-1 for mud to 40 cm s-1 for sand-capped mud. In conclusion, improved benthic light and increased anchoring capacity by sand-capping, a marine restoration practice, has the potential to facilitate restoration of otherwise lost eelgrass habitats.

Dayara bugyal restoration model in the alpine and subalpine region of the Central Himalaya: a step toward minimizing the impacts

Eco-restoration initiative work in the high altitude Dayara pastureland (3501 m) from the Indian Himalayan Region has been considered to be one of the successful field demonstration against both natural and anthropogenic degradation. The present study therefore attempts to assess the implications of entire eco-restoration model as practiced by Department of Forest, Government of Uttarakhand in 2019. Its assessment was done by calculating restoration success index by way of considering three categories, viz., direct management measure (M), environmental desirability (E) and socio-economic feasibility (SE) considering 22 individual variables. ‘M’ comprised both biotic and abiotic pressures. Grazing and tourism were biotic, while abiotic pressure was considered mainly soil erosion in alpine area due to topographic fragility. Above ground vegetation profile and below ground soil nutrient profile (N, P, K, pH and water holding capacity) were analyzed in ‘E’ component. In the last but not least, ‘SE’ was analyzed to assess the social acceptability of the local communities and stakeholders who are supposed to be ultimate beneficiary of alike interventions. Direct management measure was found with the variable index score of 0.8 indicating the higher score as compared to environmental desirability (0.56). Under direct management measure, grazing and tourists’ carrying capacity of the area was analyzed with high management needs to call the region sustainable in terms of availability of bio-resources. The ecosystem index score was evaluated for the reference (81.94), treated (64.5) and untreated zones (52.03), wherein increasing profile of these values were found. The outcomes like improved vegetation profile in terms of total herb density, soil nutrient profile of the restored area along with soil pH (4.96) and water holding capacity (49.85%) were found to be restored significantly along with controlling 169.64 tonne year-1 soil erosion from draining. The assessment of grazing pattern of 118 migratory Cow Unit (CU) (76 horse/mule and 18 sheep/goat, already controlled), 318 local CU (30 horse/mule and 187 sheep/goat) were calculated and recommended to be controlled. Tourists’ carrying capacity of 274 tourists per day and manual removal of Rumex nepalensis at the shepherd camping site were found to be worth to apply in the area. Use of biodegradable but locally sourced material and engaging local villagers in this endeavor were also found to be in harmony with SDG Goal 1 (no poverty). Therefore, the restoration and its evaluation model could have its future prospects to prove as a successful restoration practice. This restoration practice could not only be worth in high altitude degraded alpine pastures of the Indian Himalayan Region but also to other mountain alpine and sub-alpine ecosystems.

Advanced Materials in Cultural Heritage Conservation

Cultural Heritage is a crucial socioeconomic resource; yet, recurring degradation processes endanger its preservation. Serendipitous approaches in restoration practice need to be replaced by systematically addressing conservation issues through the development of advanced materials for the preservation of the artifacts. In the last few decades, materials and colloid science have provided valid solutions to counteract degradation, and we report here the main highlights in the formulation and application of materials and methodologies for the cleaning, protection and consolidation of works of art. Several types of artifacts are addressed, from murals to canvas paintings, metal objects, and paper artworks, comprising both classic and modern/contemporary art. Systems, such as nanoparticles, gels, nanostructured cleaning fluids, composites, and other functional materials, are reviewed. Future perspectives are also commented, outlining open issues and trends in this challenging and exciting field.

Is planting trees good or bad?

Planting trees is popular, widely accepted and supported, resulting with many initiatives and commitments around the globe. At the same time, planting trees is questioned more and more and receive a lot of criticism. In this paper we consider the arguments of both sides and discuss them using a scientific evidence. Determination of restoration opportunities and restoration needs requires more intention to existing ecosystems and their use. Commitments and expectations need to be realistic to maintain constant support based on real results. Planting trees is not the best solution for carbon storage, but it is one of the best solutions available at this moment. Even if reduce anthropogenic CO2 emission to zero, we will need to plant trees. Planting trees can have both negative and positive effect on water availability and socio-economy, depending on restoration practice applied. Planting trees is definitely good, if it is done at appropriate site and with appropriate tree species and if it is based on proper planning and realistic expectations.

INSIDE THE CASTS OF THE POMPEIAN VICTIMS: RESULTS FROM THE FIRST SEASON OF THE POMPEII CAST PROJECT IN 2015

The first casts of the forms of Pompeian victims of the AD 79 eruption of Mt Vesuvius were successfully achieved under the directorship of Giuseppe Fiorelli in 1863. To date, 104 individuals have been cast by restorers and archaeologists during the course of excavation. The methods used to obtain these casts were not well documented. It was always assumed that plaster or lime cement was merely poured into voids which preserved the impression of organic remains buried in the ash that covered the site during the catastrophe. It was also assumed that the undisturbed skeletal remains of victims were encased within the casts. The initial aim of the Pompeii Cast Project was to study these bones to build on and test the results of an earlier study of the large sample of Pompeian human remains that were disarticulated by post-excavation activities. Apart from providing information about the people who did not manage to escape the eruption, the project aimed to challenge previous interpretations of the lives and activities of these victims that were solely based on superficial inspection and circumstantial evidence. Twenty-six casts were subjected to CT scanning or X-ray analysis in 2015. The results were unexpected. It was clear that the casts had been considerably manipulated. Bones were often removed prior to casting, and other elements had been introduced. This ongoing project has now been expanded to establish how these casts were achieved, to better understand nineteenth- and twentieth-century archaeological and restoration practice.