Fluttuazioni stagionali della vegetazione di una discarica dismessa del piacentino

Translated title of the contribution: [Autom. eng. transl.] Seasonal fluctuations of the vegetation of a disused landfill in the Piacenza area

Chiara Cassinari, Adriano Marocco, Marco Trevisan, Roberta Salvi, Luca Giupponi, Roberta Battaglia, Paolo Manfredi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

[Autom. eng. transl.] This work is part of a life project co-financed by the European Union (Life +, LIFE 10 ENV / IT / 0400 NewLife; http://www.lifeplusecosistemi.eu) aimed at environmental upgrading of an ex-download for means of an innovative technology, conceived by the company mcm Ecosistemi owner of the initiative. The study area is located in the municipal area of Piacenza (Emilia-Romagna) in the Borgotrebbia area and has a vegetation cover mainly made up of nitrofile herbaceous species of degraded environments (Giupponi et al., 2013a; Giupponi et al., 2013b ). Giupponi et al. (2013c) identified five vegetational typologies representing two variants and three facies of the same community (Convolvolus arvensis-Cynodon dactylon) belonging to the Stellarietea mediae class: Rumex crispus facies, Elymus repens facies (with species tolerant to heavy metals in the soil), facies with Hordeum murinum (indicator of dry soils), a variant of Xanthium orientale subsp. italicum (rich in heliophilic and thermophilic terofite), a variant of Alopecurus rendlei (a more evolved variant of wet soils). The objective of this study is to highlight and describe the seasonal fluctuations (floristic and physiognomic) of the different types of vegetation present in the former landfill in order to broaden the knowledge concerning the communities established in places particularly degraded by human activity. 35 phytosociological surveys were carried out, one for each cenosis identified by Giupponi et al. (2013c), conducted monthly from April to October 2013. For each of the five vegetation types, the cluster analysis of the surveys was carried out to identify the floristic-physiognomic similarities of the vegetation and thus identify the seasonal aspects. We then proceeded to analyze the various seasonal characteristics of the five vegetation types from the floristic point of view, this elaborating and comparing the respective biological spectra. In all the dendrograms obtained, two main groupings have been identified that define a spring and summer-autumn aspect of each plant community. The spring aspects are different from the summer-autumnal ones due to the presence of Bromus sterilis, Bromus hordeaceus, Geranium dissectum, Alopecurus rendlei and Stellaria media. Amaranthus retroflexus, Atriplex patula, Cynodon dactylon and Polygonum aviculare are present in all five summer-autumn facies. The only species that appears from April to October in all the reliefs is Elymus repens which has good coverage values in the months of May, June and July. Considering the weighted biological spectra of the individual spring aspects, a preponderance of terofite has been noted, compared to geophytes and hemicryptophytes. In the summer-autumn aspects a general increase in species was observed with adaptations to arid environments. In fact, an increase in therophytes has been noted, but also of those geophytes such as Cynodon dactylon and Convolvulus arvensis whose Landolt indices express adaptations to dry soils. In the summer months, in fact, unfavorable conditions mainly due to edaphic aridity occur, this is also due to the poor hydrogeological characteristics of the covering soil.
Translated title of the contribution[Autom. eng. transl.] Seasonal fluctuations of the vegetation of a disused landfill in the Piacenza area
Original languageItalian
Title of host publicationAtti di SISV 2014
Pages49
Number of pages1
Publication statusPublished - 2014
EventSISV 2014 - Roma
Duration: 17 Sep 201419 Sep 2014

Conference

ConferenceSISV 2014
CityRoma
Period17/9/1419/9/14

Keywords

  • discarica dismessa
  • vegetazione spontanea

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