Humic Acids Optical Properties of Rendzina Soils in Diverse Environmental Conditions of Serbia

Radmanović, Svjetlana; Nikolić, Nataša; Đorđević, Aleksandar

doi:10.7251/afts.2018.1018.063r

Cited by 4 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Susmel's formulas were constructed on the basis of measurements in Italian relict nuclei and primary (virgin) forests in Croatia [94,[128][129][130][131]. In the spirit of Susmel they should serve as a potential ecological model for Italian alpine forests.…”

Section: Examples In Alpine Environmentmentioning

confidence: 99%

Soil-Conscious Forestry and the Forbidden Apple

Zanella,

Bernier,

Zampedri

et al. 2023

Preprint

View full text Add to dashboard Cite

We propose a silviculture with a purely biological logic that takes soil into account. The article is divided into three parts: 1) presentation of the issue in the context of biodiversity and forest pro-tection; 2) impact of the soil functioning on forestry; 3) possible implementation of soil functioning in forestry practice, to support and protect a non-or minimally anthropized evolution of the forest. The first chapter illustrates the importance of the forest for the future of the planet and our human species, referring to recently published works on the topic of climate warming and biodiversity. The second illustrates the aspects that link soil dynamics to the silvogenetic cycle, focusing on the humipedon (organic and organo-mineral surface horizons, approximately the first 30 cm of forest soil), and more significant carbon storage in old forests since up to 2/3 is found in the soil. In the third chapter we consider the possibility of lengthening the forestry cycle, to allow the return of nutrients to the soil. Theoretical graphs and distribution models of the number of trees as a func-tion of diameter and age are reported, with examples of logging in uneven Alpine forests, with reference to Swiss fir-beech forests published on the Pro-Silva website.

show abstract

Section: Examples In Alpine Environmentmentioning

confidence: 99%

Soil-Conscious Forestry and the Forbidden Apple

Zanella,

Bernier,

Zampedri

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The UV-Vis spectroscopy method makes it possible to conduct qualitative assessment of HA humification degree with estimated coefficients ∆logK and E 4 /E 6 [16,40]. Maxima of absorption of key aromatic structures in HA (lignin, phenol fragments, aromatic amino acids) were observed in the wavelength range of 260-280 nm, while in the 400-465 nm region a change in the HA absorption curve was obvious [41,42]. E 270 , E 465 coefficients indicated a gradual increase in molecular complexity of HAs from permafrost layers as compared to HAs of STL of the peatlands under study.…”

Section: Elemental Composition and Optical Properties Of Hasmentioning

confidence: 99%

“…Lighter fractions possibly may have been recently It is important to note that from the depth of 100 cm (Plots 1-1 and 1-2) a gradual increase in the ash content of soil samples was observed, from 40 to 90% in the lower part of the profile. According to the data [42], ash elements can lead to neutralization and weak polymerization of HA molecules. The increase in number-average HA molecular weight in the permafrost was likely to be caused by coagulation of HAs on the mineral matrix of peat deposits with the formation of high molecular weight HAs.…”

Section: Molecular Weight Distribution Of Hasmentioning

confidence: 99%

The Molecular Composition of Humic Acids in Permafrost Peats in the European Arctic as Paleorecord of the Environmental Conditions of the Holocene

2022

View full text Add to dashboard Cite

The purpose of our research is focused on examination of the transformation regularities of molecular composition of humic acids (HAs) in the hummocky frozen peatlands of the European Arctic as a marker of climatic changes in the Holocene, and assessment of the stabilization of soil organic matter under the conditions of modern climatic warming. Histosols located in the two subzones of the European Arctic served as the research subjects. This territory is actively used for reindeer breeding, which is a vital agricultural branch in the Far North of the Russian Federation. The data obtained reveal the main trends in the formation of HAs from Arctic peatlands under different environmental conditions. Modern peat sediments (top layers) in the middle and late Holocene period formed out of bryophyte residues and contained HAs with long-chain carbohydrate and paraffin structures in their composition. These structures enlarged the dynamic radii of HA molecules, and, thus, caused high average molecular weight values. The more favorable climatic conditions of the early Holocene (the Atlantic optimum) defined the botanical composition of peat, which was dominated by tree and sedge communities with high contents of lignin components and, as a consequence, a larger share of aromatic fragments, characterized by thermo-biodynamic resistance in HAs of horizons in the lower and central profile parts. The molecules of HAs are an archive of paleoclimatic records. The Subboreal and Subatlantic climatic conditions determined the specifics of vegetation precursors and, as a result, the molecular structure of HAs in seasonally thawed layers, with a predominance of long-chain aliphatic fragments. The conversion of HAs from Histosols led to an increase in the proportion of carbon in branched and short-chain paraffinic structures with their subsequent cyclization and aromatization. The results of this process are most clearly manifested in layers formed during the Holocene I and II climatic optima. Higher biologically active temperatures of the seasonally thawed layer of soils at bare spots (without vegetation) determined the accumulation of thermodynamically more stable HA molecules with a high content of aromatic fragments. This contributed to both the stabilization of the SOM and the conservation of peatlands in general.

show abstract

The Ecotourism Industry's Role in Environmental Stewardship

Karimov,

Kulmetov,

Safarova

et al. 2024

Natural and Engineering Sciences

View full text Add to dashboard Cite

Indeed, the overall rise in environmental pollution from natural ecosystems has become one of the major threats to biodiversity and the health of any given community across the globe. Traditional tourism has been blamed as one of the prime agents of this environmental degradation; hence, the need for alternatives in sustainability is becoming increasingly pressing. This paper explores in detail the potential this industry holds for transforming the paradigm from pollution to preservation. It demonstrates how ecotourism, through the use of sustainability and environmental education, can be among the most powerful tools in combating the negative impacts of pollution on sensitive ecosystems. The article now discusses a few important case studies from different parts of the world to clearly show how ecotourism efforts have helped reduce pollution, protect natural habitats, and improve biodiversity. The discussion considers how tourism would encourage tourists and locals to take environmentally conscious actions in the interest of the environment, minimizing waste, reducing carbon footprints, and offering protection to natural resources. Besides, the article sets up that ecotourism has economic motives that include providing financial rewards for the conservation of ecosystems and offering sustainable livelihoods to people living within and around the protected areas. The article further talks about the ecotourism challenges, such as "greenwashing" and a rigorous regulatory framework in place, to ensure the ecotourism practices actually help in environmental preservation. This paper will suggest ways in which governments, local communities, environmental organizations, and the tourism industry, in greater ways, should be co-operative in having an optimal benefit on environmental sustainability through ecotourism. In other words, what this article suggests is that ecotourism in itself is not going to solve the problem of environmental pollution, and it remains important in the greater scheme of environmental stewardship. It is possible that this transition-from pollution to preservation-is being led by ecotourism, where responsible travel and conservation, coupled with sensitization about environmental problems, take place. The article calls for continued research and increased investment in the practice of sustainable tourism to finally see ecotourism live up to its promise as a driver of ecological sustainability and an example for other industries to follow.

show abstract

Humic Acids Optical Properties of Rendzina Soils in Diverse Environmental Conditions of Serbia

Cited by 4 publications

References 14 publications

Soil-Conscious Forestry and the Forbidden Apple

Soil-Conscious Forestry and the Forbidden Apple

The Molecular Composition of Humic Acids in Permafrost Peats in the European Arctic as Paleorecord of the Environmental Conditions of the Holocene

The Ecotourism Industry's Role in Environmental Stewardship

Contact Info

Product

Resources

About