biotic and abiotic factors
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Zoosymposia ◽  
2021 ◽  
Vol 20 ◽  
Author(s):  
ZEHUI ZHENG ◽  
BIN XIA

This paper provides a survey of a collection of references on life history studies of eight species in the family Cheyletidae. It reviews some factors (including sex difference, temperature, humidity and prey) that affect the development time and lifespan in Cheyletidae. This paper also analyzes the effects these biotic and abiotic factors on the growth and development of cheyletid mites.


Author(s):  
L. V. Vegera ◽  
V. O. Ponomarenko

Since the founding of the «Sofiyivka» Dendrological Park, over more than two centuries, the structure of the dendrocenosis and park compositions including the «Champs Elysees» (Quarter 26), located in the center of the park' s historic core changed. The changes were caused by a complex of biotic and abiotic factors that influenced the taxonomic composition of plants. The paper presents the results of a study of the dynamics of changes in the dendrocenosis of the quarter 26 «Champs Elysees», which will contribute to the preservation and restoration of the historic site of the ancient park, in particular its taxonomic composition.


2021 ◽  
Author(s):  
Isabeau Caza‐Allard ◽  
Martin Laporte ◽  
Guillaume Côté ◽  
Julien April ◽  
Louis Bernatchez

Forests ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1541
Author(s):  
Vincent Robin ◽  
Stefan Dreibrodt ◽  
Brigitte Talon

Old-growth forests are of high interest for biodiversity conservation, especially in the disturbance-prone Mediterranean landscapes. However, it remains unclear whether the survival of patches of old-growth forest in the degraded Mediterranean landscapes results from local anomalies or from past, larger forests. Therefore, in this study, we assessed (1) the origin, (2) the long-term ecological trajectory, and (3) the mechanism(s) that explain the survival of a Mediterranean old-growth forest, the Sainte-Baume forest. To achieve this, we used soil charcoal analysis. We opened fifteen soil profiles in the forest and five in its surrounding areas for soil description and sampling. The soil descriptions enabled us to highlight in situ soil horizon and colluvial layers. A total of 1656 charcoal pieces from different soil samples were taxonomically identified to characterize the composition of past forests. Selected charcoal pieces (n = 34) were dated to obtain chronological data. Our investigations indicate that the survival of the Mediterranean old-growth forest, in the context of the semi-open/open Mediterranean landscapes, is the result of a combination of biotic and abiotic factors, which reduced the influence of past forest disturbances. Thus, the resistance and resilience of the forest areas are preserved over a long-term ecological trajectory. Therefore, the potential of Mediterranean old-growth forests as baseline reference points for the conservation of biodiversity is related to the identification and maintenance of the local biotic and abiotic factors which allowed the survival of the old-growth forest.


2021 ◽  
Author(s):  
Mina Adriana Mosneagu ◽  

Agapia Monastery – the remarkable Moldavian monastery painted by Nicolae Grigorescu – has a precious heritage of icons, books and documents, liturgical textiles, goldsmithing. Among these, the main place is occupied by the icons painted in the XV-XIX centuries, either in post-Byzantine style, in tempera technique, or in realistic style, in oil technique. Some icons from the XVIII-XIX centuries have been preserved and restored in the Icon Restoration laboratory of the Faculty of Theology in Iaşi. In time, the icons kept in the storage of the Monastery Museum have suffered of degradation caused both by the deficient author’s technique and by the exogenous, biotic and abiotic factors. The wooden supports of some icons were severely degraded by the attack of xylophagous insects, being affected both the mechanical resistance and the appearance of the wood. The numerous galleries immediately below the pictorial layer determined its deformation. The pictorial layer of some icons was degraded mainly due to the errors of the painters’ work technique: very thin and fragile preparation layer or excessive binder, which led to the formation of accentuated early cracks. The appearance of the icons was affected either by the chromatic alteration of the protective varnish, or by the deposits of dust and soot in the atmosphere. The interventions for the conservation of the icons consisted in biociding the painting support and in consolidating the pictorial layer detached from the wooden support. The restoration of the icons aimed at removing the dirt deposits from the painting by physico-chemical means, filling the gaps in the icons and their chromatic integration, with easily reversible materials. After conservation and restoration, the icons returned to the Agapia Monastery for use.


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