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Relevant bibliographies by topics / Successioni numeriche

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Journal articles

Academic literature on the topic 'Successioni numeriche'

Author: Grafiati

Published: 26 July 2024

Last updated: 27 July 2024

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Journal articles on the topic "Successioni numeriche"

1

Winkler, Dániel. "Ecological Succession of Breeding Bird Communities in Deciduous and Coniferous Forests in the Sopron Mountains, Hungary." Acta Silvatica et Lignaria Hungarica 1, no. 1 (2005): 49–58. http://dx.doi.org/10.37045/aslh-2005-0004.

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The relationship between breeding bird communities and different phases of secondary succession of deciduous (sessile oak – Quercus petraea) and coniferous (spruce – Picea abies) forests in the Sopron Mountains was studied. The bird censi have been carried out in 5 different successional stages using the “double-visit fixed-radius point count technique”. A total of 38 bird species were encountered. There are typical bird communities to order to different stages of forest succession, containing unique bird species or species appearing predominantly in that successional stage. The study has shown structural changes in breeding bird communities during the succession. Bird species richness, density and diversity showed the same trends. Their numerical values were the lowest in the clear-cut areas with young (1-2 year old) plantations, and the highest in the mature stands. After a starting increase (shrub stage) there is a slight decline (10-12 year old stands) because of the canopy closure of the young trees. Further decrease can be observed in the low pole stands, as these habitats are no longer appropriate for species nesting in shrubs and not yet suitable for the hole-nesting ones. Species richness, density and diversity were lower in early pole and older spruce stands than in the corresponding oak stands.

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2

Monga, Priyanka, Madhav Kumar, Vandana Prasad, and Yogesh Joshi. "Palynostratigraphy, palynofacies and depositional environment of a lignite-bearing succession at Surkha Mine, Cambay Basin, north-western India." Acta Palaeobotanica 55, no. 2 (2015): 183–207. http://dx.doi.org/10.1515/acpa-2015-0010.

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Abstract The paper reports palynology and palynofacies studies of lignite-bearing sediments exposed in an opencast mine succession at Surkha, Bhavnagar District, in the coastal region of Gujarat, India. The study examined the relationships between the palynoflora, sedimentary organic matter and environment at the time of deposition of lignite and associated sediments. Based on dinoflagellate cyst biostratigraphy, the sedimentary succession is dated as early Eocene (Ypresian). Palynofacies studies helped reveal the palaeoenvironmental fluctuations. The dominance of angiosperm pollen grains, freshwater algae, microthyraceous fungi and a large share of land debris in the lower part of the succession suggests a freshwater swamp environment of deposition for the basal lignite facies. Two cenozones - Matanomadiasulcites maximus and Lakiapollis ovatus - were identified in the lower lignite facies, determined from the dominance of these pollen grains in the palynological assemblages. The presence of angiosperm pollen grains and pteridophyte spores in the carbonaceous shale horizon above the lignite facies indicates a change in the depositional regime from freshwater swamp to lagoonal. This was identified as the Arecipites wodehousei cenozone due to its numerical abundance in the assemblage. Dinoflagellate cyst abundance and diversity, and microforaminiferal test linings along with well-sorted terrestrial debris in the mudstone in the upper part of the succession suggest a more open marine estuarine type of depositional environment. The Homotryblium complex along with Cordospheridium fibrospinosum, Kenleyia sp., and Thalassiphora pelagica dinoflagellate cysts are the main representatives of this zone, determined as the Homotryblium tenuispinosum cenozone. The changing depositional settings (freshwater swamp-lagoonal-estuarine) along the vertical succession indicate a marine transgression in this region. Results from palynological studies of early Palaeogene successions of the Cambay and Kutch basins correlate well with the present findings.

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3

Ma, Wei, Shen Lei, Yujun Sun, and Jason Grabosky. "Forest succession in post-agricultural Larix olgensis plantations in northeast China." Journal of Forestry Research 31, no. 6 (2019): 2495–505. http://dx.doi.org/10.1007/s11676-019-00960-7.

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Abstract In order to understand the management of regional vegetation, numerical classification and ordination are widely used to investigate community distribution and vegetation features. In particular, two-way indicator-species analysis programs (TWINSPAN) classifies plots and species into different groups. De-trended correspondence analysis (DCA) and canonical correspondence analysis (CCA) reflects the relationship between community and site conditions. Afforestation with Larix olgensis Herry. Plantations is a suitable restoration strategy on post-agricultural fields in the Lesser Khingan Mountains. The results of this study show how these plantations develop over time to establish a reliable pathway model by measuring and clarifying the succession process. Twenty-eight L. olgensis plantations along a 48-year chronosequence of afforestation were investigated with a quadrat sampling method. Species composition, community structure attributes of diversity, and site conditions were analyzed. Communities were classified by TWINSPAN into five successional stages: immature, juvenile, mid-aged, near-mature and mature. Classifications were validated by DCA and CCA analysis. Site conditions such as soil and litter thickness, soil organic matter, soil density, and pH were measured. Successional stages varied in community composition and species population, accompanied by time from afforestation and a gradient of site conditions. This gradient showed changes in vegetation occurrence and diversity coinciding with changes in soil conditions. The study showed that L. olgensis plantations had marked predominance in growth and were associated with improved soil fertility and the formation of a stable plant community.

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4

Salugin, A. N. "NUMERICAL MODELING OF SUCCESSIONAL TRANSITIONS IN AGROECOLOGY." Rossiiskaia selskokhoziaistvennaia nauka, no. 1 (2020): 62–65. http://dx.doi.org/10.31857/s2500-2627-2020-1-62-65.

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5

Salugin, A. N. "Numerical Modeling of Successional Transitions in Agroecology." Russian Agricultural Sciences 46, no. 2 (2020): 187–91. http://dx.doi.org/10.3103/s1068367420020172.

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6

Fischer, Martin H., and Richard A. Mills. "A spatial perspective on numerical concepts." Behavioral and Brain Sciences 31, no. 6 (2008): 651–52. http://dx.doi.org/10.1017/s0140525x08005670.

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AbstractThe reliable covariation between numerosity and spatial extent is considered as a strong constraint for inferring the successor principle in numerical cognition. We suggest that children can derive a general number concept from the (experientially) infinite succession of spatial positions during object manipulation.

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7

Chang, Li, Yuanqing He, Taibao Yang, Jiankuo Du, Hewen Niu, and Tao Pu. "Analysis of Herbaceous Plant Succession and Dispersal Mechanisms in Deglaciated Terrain on Mt. Yulong, China." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/154539.

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Ecological succession itself could be a theoretical reference for ecosystem restoration and reconstruction. Glacier forelands are ideal places for investigating plant succession because there are representative ecological succession records at long temporal scales. Based on field observations and experimental data on the foreland of Baishui number 1 Glacier on Mt. Yulong, the succession and dispersal mechanisms of dominant plant species were examined by using numerical classification and ordination methods. Fifty samples were first classified into nine community types and then into three succession stages. The three succession stages occurred about 9–13, 13–102, and 110–400 years ago, respectively. The earliest succession stage contained the association ofArenaria delavayi +Meconopsis horridula. The middle stage contained the associations ofArenaria delavayi + Kobresia fragilis,Carex capilliformis +Polygonum macrophyllum,Carex kansuensis, and alsoPedicularis rupicola. The last stage included the associations ofKobresia fragilis + Carex capilliformis,Kobresia fragilis,Kobresia fragilis+Ligusticum rechingerana, andKobresia fragilis + Ligusticum sikiangense. The tendency of the succession was from bare land to sparse vegetation and then to alpine meadow. In addition, three modes of dispersal were observed, namely, anemochory, mammalichory, and myrmecochory. The dispersal modes of dominant species in plant succession process were evolved from anemochory to zoochory.

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8

Catelli, Marika, Angelica Di Domenico, Carlo Mina, and Monica Treppiedi. "Alla scoperta dei numeri che ci circondano." Didattica della matematica. Dalla ricerca alle pratiche d’aula, no. 11 (May 18, 2022): 69–94. http://dx.doi.org/10.33683/ddm.22.11.4.

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L’articolo presenta dei percorsi didattici finalizzati all’apprendimento numerico in prima elementare, attraverso la ricerca e la conoscenza dei numeri con cui i bambini si confrontano nella quotidianità. I percorsi sono incentrati su attività di scoperta, di stampo laboratoriale e ludico, che hanno la finalità di promuovere le competenze numeriche di base, fondamentali per questo anno scolastico, proponendo anche sviluppi per ampliare e consolidare tali apprendimenti anche negli anni scolastici successivi. Per ogni percorso, vengono presentati alcuni possibili legami con i materiali creati all’interno del progetto MaMa – Matematica per la scuola elementare, che possono aiutare il docente per la progettazione di tali percorsi, consentendo di alternare attività di scoperta, concrete e manipolative, con momenti di riflessione e allenamento.

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9

CHERRUAULT, Y. "Some numerical methods for resolution of non-linear integral equations." MAUSAM 36, no. 3 (2022): 319–22. http://dx.doi.org/10.54302/mausam.v36i3.1924.

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We suggest several methods which bring back the resolution of non-linear integral equations to a succession of linear integral equations or to a linear algebraic system. All these methods have been tested numerically.

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10

Blajer, W. "Aircraft program motion along a predetermined trajectory Part II. Numerical simulation with application of spline functions to trajectory definitions." Aeronautical Journal 94, no. 932 (1990): 53–58. http://dx.doi.org/10.1017/s0001924000022430.

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Aspects of numerical simulation of aircraft program flight along a predetermined trajectory are presented. An emphasis is laid on the problem of describing the required trajectory by means of a succession of defined points. A spline function method is used for interpolation and smoothing routines. Some numerical illustrations of aircraft trajectory flight simulation (only planar motion) are demonstrated and discussed.

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