Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.3/1348
Título: Morphometry of the epidermis of an invasive megascoelecid earthworm (Amynthas gracilis, Kinberg 1867) inhabiting actively volcanic soils in the Azores archipelago
Autor: Cunha, Luís
Campos, Itxaso
Montiel, Rafael
Rodrigues, Armindo
Morgan, Andrew
Palavras-chave: Amynthas
Earthworm
Volcanic Soil
Morphometry
Epidermis
Azores
Data: Jan-2011
Editora: Elsevier
Citação: "Ecotoxicology and Environmental Safety". ISSN 0147-6513. Volume 74, Issue 1, January 2011, pp. 25-32(8).
Resumo: For the first time, the structure, dimensions, and composition of the epidermis of an invasive earthworm species that has successfully colonized hostile conditions in actively volcanic soil on Sao Miguel (Azores) have been measured. Metal concentrations in actively volcanic (Furnas) and volcanically inactive(Fajã) soils were similar; however, Furnas soil was characterised by elevated temperature (10 1C differential), relative hypoxia, extremely high CO2 tension, and accompanying acidity. The epidermis of earthworm’s resident at Fajã was approximately twice the thickness of the epidermis of conspecifics resident in Furnas soil. Reference worms transferred to Furnas soil for 14 days experienced an epidermal thinning of approximately 51%. In comparison, when Furnas earthworms were transferred to mesocosms at the relatively benign Fajã site, their epidermal thickness increased by approximately 21%over 14 days. Earthworms resident in Furnas soil had higher goblet cell counts than the residents of volcanically inactive soil on a neighbouring island (S.Maria). Transferring worms from S.Maria to mesocosmsat Furnas induced a significant increase in goblet cell counts. Clearly, the active volcanic environment at Furnas poses a multifactorial stress challenge to the epigeic A. gracilis colonizer.
Descrição: Copyright (c) 2010 Elsevier Inc. All rights reserved.
Peer review: yes
URI: http://hdl.handle.net/10400.3/1348
ISSN: 0147-6513
Versão do Editor: http://dx.doi.org/10.1016/j.ecoenv.2010.08.004
Aparece nas colecções:DBIO - Artigos em Revistas Internacionais / Articles in International Journals

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