Search results for " succession"
showing 6 items of 346 documents
Afforestation and reforestation: the Sicilian case study
2014
In some regions of the world such as the Northern Hemisphere, the abandonment of agricultural land is one of the most widespread forms of land use change. In general, abandonment is followed by colonization by herbaceous and woody plants. Since the 1950s, wide areas of Southern Italy have been afforested for soil conservation improvement. In order to quantify the effects of agricultural abandonment and artificial afforestation on soil organic carbon (SOC), a dataset of 48 Sicilian sites has been analyzed. Because of their high environmental variability, these sites can be considered as representative of Southern Italy and in general of the Mediterranean basin. Soil samples were taken throug…
Spatial Succession for Degradation of Solid Multicomponent Food Waste and Purification of Toxic Leachate with the Obtaining of Biohydrogen and Biomet…
2022
A huge amount of organic waste is generated annually around the globe. The main sources of solid and liquid organic waste are municipalities and canning and food industries. Most of it is disposed of in an environmentally unfriendly way since none of the modern recycling technologies can cope with such immense volumes of waste. Microbiological and biotechnological approaches are extremely promising for solving this environmental problem. Moreover, organic waste can serve as the substrate to obtain alternative energy, such as biohydrogen (H2) and biomethane (CH4). This work aimed to design and test new technology for the degradation of food waste, coupled with biohydrogen and biomethane prod…
Characteristics of Mesozoic fluvio-lacustrine formations of the western Central African Republic (Carnot Sandstones) by means of mineralogical and ex…
1990
Abstract The so-called Carnot Sandstones, Mesozoic fluvio-lacustrine detrital formation, which stretch over an area of more than 40 000 km 2 in the western part of the Central African Republic, are made of a succession of conglomerates, sandstones and argilites which can reach 300 m in thickness. Heavy mineral analyses and quartz exoscopic studies of this detrital material allow to understand the geology of these formations. The detrital material origin: heavy mineral distribution in the lower levels indicates mostly a meridional origin with a quantitatively poor peripheral supply. The importance of the transport: quartz exoscopic observations show that the main part of the detrital materia…
Vegetation dynamics on abandoned terraces of Sicily: the course and driving forces of succession
2007
In Mediterranean Europe, terrace landscapes can be found where 1) the orography is characterized by hills or mountains, 2) there is a high amount of stone outcrops and 3) the human need for agricultural production was quite high till the recent past. During the last century, many of these landscapes have been abandoned, due to their unsuitability for mechanized, intensive agriculture and due to the general land abandonment trend which arised in large parts of Europe. Since with land abandonment start secondary succession processes, the plant and animal communities linked to agroecosystems are replaced by other species which find their habitat in the developing succession stages. This proces…
Landscape-ecological and social aspects of natural afforestation of abandoned agricultural land
2013
Anda Ruskule LAUKSAIMNIECĪBAS ZEMJU AIZAUGŠANAS AINAVU EKOLOĢISKIE UN SOCIĀLIE ASPEKTI Anotācija Promocijas darbā raksturots neizmantoto lauksaimniecības zemju apmežošanās process Vidzemē, aplūkoti to ietekmējošie faktori, kā arī integrēti izvērtēti šī procesa ainavu ekoloģiskie un sociālie aspekti. Pirmo reizi Latvijā analizētas ainavas telpiskās struktūras izmaiņas, kas radušās, aizaugot lauksaimniecības zemēm. Pētījumā ir identificēti telpiskā rakstura un sugu sastāva ziņā atšķirīgi aizaugšanas tipi un izvērtēta to saistība ar dažādiem vides apstākļiem. Apzināts iedzīvotāju un ekspertu viedoklis par apmežošanās procesu, tā ietekmi uz ainavas un dabas daudzveidību, kā arī turpmākām izmant…