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Oribatid mites (Acari, Oribatida) - bioindicators of forest soils pollution with heavy metals and fluorine / Otilia Ivan ; Niculai Alexandru Vasiliu in Annals of forest research, vol 52 n° 1 (January 2009)    

Public [article]  inAnnals of forest research > vol 52 n° 1 (January 2009) . - p. 11-18 Titre : Oribatid mites (Acari, Oribatida) - bioindicators of forest soils pollution with heavy metals and fluorine Type de document : Article/Communication Auteurs : Otilia Ivan, Auteur ; Niculai Alexandru Vasiliu, Auteur Année de publication : 2009 Article en page(s) : p. 11-18 Note générale : Bibliogr. Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] indicateur biologique [Termes descripteurs IGN] pollution des sols [Termes descripteurs IGN] sol forestier [Termes descripteurs IGN] teneur en métaux lourds [Termes IFN] arthropode Résumé : (Auteur) "The present study analyzes the effects of pollution with heavy metals and fluorine on the oribatid mite communities populating the forest soils, on the basis of the researches carried on in three oak-type forests, situated at different distances from the Phosphoric Fertilizers Plant of Valea Cãlugãreascã (the Prahova county, Romania). In the forest strongly affected by pollution, the heavy metals concentrations were 2-9 times higher than the maximum allowable limits (MAL). In the perimeter with medium level of pollution, the content of Pb, Cr and Ni were over the MAL, while Co and Cd concentrations are closed to these limits. Two years after closing of this industrial unit, a decrease of soil loading with heavy metals was to be found, mostly in the surface sub-horizon. In the control perimeter, the oribatids constitute a complex community with a large specific diversity. The characteristic species for this zone (South-Eastern of Romania) are frequent and/or abundant, having a high ecological significance. In the affected forests, the oribatid mites' densities are 6-476 times lower than in the control perimeter. Their communities are constituted of a small number of tolerant species (euryplastic, unspecific fauna), being characterized by a low specific diversity and a marked structural instability. The analysis of the oribatid species distribution in the control and polluted ecosystems has evidenced that certain elements can be considered bioindicators for this type of pollution. Our researches carried out two years after the production stopping, have not evidenced a favourable evolution of the oribatid mites communities. It is probably that the recovery of the decomposers' trophic chains requires a longer time." Numéro de notice : IFN_5758 Thématique : FORET Nature : Article En ligne : http://www.editurasilvica.ro/afr/52/1/02_Ivan.pdf Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73485 [article]

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en open access Oribatid mites (Acari, Oribatida)... Adobe Acrobat PDF

Structure and dynamics of the oribatid mite communities (Acari, Oribatida) in some Quercus forests, in relation with the treatments used in the control of defoliating insects / Otilia Ivan in Annals of forest research, vol 52 n° 1 (January 2009)    

Public [article]  inAnnals of forest research > vol 52 n° 1 (January 2009) . - p. 5-10 Titre : Structure and dynamics of the oribatid mite communities (Acari, Oribatida) in some Quercus forests, in relation with the treatments used in the control of defoliating insects Type de document : Article/Communication Auteurs : Otilia Ivan, Auteur Année de publication : 2009 Article en page(s) : p. 5-10 Note générale : Bibliogr. Langues : Anglais (eng) Descripteur : [Termes descripteurs IGN] chênaie [Termes descripteurs IGN] Quercus (genre) [Termes descripteurs IGN] xylophage [Termes IFN] arthropode [Termes IFN] biologie du sol Résumé : (Auteur) "This study was carried out in the context of some complex researches concerning the effects of long standing use of the pesticides in the control of the defoliating insects, in forest ecosystems. These investigations showed that the structural parameters of the oribatid mites' communities are obviously influenced by the stands biotic and abiotic factors, alongside some varied anthropogenic factors, such as: treatments, industrial pollution, some management measures etc. This paper includes a comparative analysis of the research results obtained in two forest stands placed in the Moldavian Plateau (Ciurea Forest District, Iaºi county): Tomeºti-Poieni(integrated control of the defoliating insects)and Aanta(chemical control). The analysis of the faunistic material collected in these two forests has shown that, in the first stand(the control perimeter), the density, the number of species, and also the specific diversity have higher values compared to the second station. In unfavourable climatic conditions(e. g. during the winter season) it was observed a more increased decline of these parameters in the Aanta forest, related to the control station. In such conditions(low temperatures, deficit of humidity etc.) the change of the vertical distribution of the effectives was observed in both stands, and a massive migration of the oribatid mites in the deeper, humiferous layer of the soil. The results gathered during the project emphasize that the chemical treatments used against the defoliating insects enhance the negative effects of some natural factors, representing an additional stressing factor on the edaphic microarthropods'communities." Numéro de notice : IFN_5757 Thématique : FORET Nature : Article En ligne : http://www.editurasilvica.ro/afr/52/1/01_Ivan.pdf Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=73484 [article]

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
IFN-001-P000915	PER	Revue	Nogent-sur-Vernisson	Archives périodiques	Exclu du prêt

Documents numériques

en open access Structure and dynamics of the oribatid mite communities... Adobe Acrobat PDF