Data/hora: 01/06/2024 10:07:00

Biblioteca(s): | Embrapa Florestas.
Data corrente: | 23/09/2008
Data da última atualização: | 23/09/2008
Autoria: | ROUGERIE, R.; DECAENS, T.; DEHARVENG, L.; CHIH-HAN, C.; JAMES, S.; PORCO, D.; HEBERT, P.
Título: | DNA barcodes for soil animal taxonomy: transcending the final frontier.
Ano de publicação: | 2008
Fonte/Imprenta: | In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
Idioma: | Inglês

Conteúdo:

Soil animal communities comprise one of the largest biodiversity reservoirs in terrestrial
ecosystems and a very large proportion of species is undescribed. Soil biologists thus confront
a medium populated by probably millions of species whose discrimination remains an unfaced
challenge. While much soil biological research depends upon species diagnoses, taxonomic
expertise is collapsing. In fact, soil invertebrate identifications crystallize the four main
limitations pointed by Hebert et al. (2003): (1) that both phenotypic plasticity and genetic
variability in the characters employed for species recognition can lead to incorrect
identifications; (2) that this approach overlooks morphologically cryptic taxa, which are
common in many groups; (3) that since morphological keys are often effective only for a
particular life stage, gender or caste, many individuals cannot be identified; (4) that although
modern interactive versions represent a major advance, the use of keys often demands
such a high level of expertise that misdiagnoses are common. The aim of this review is to
present a promising approach to taxon recognition, which involves microgenomic identification
systems that involve discrimination of taxonomic units through the use of DNA sequences as
taxon ?barcodes?. The mitochondrial gene cytochrome c oxidase I (COI) has been identified
as a potential universal species barcode for animals. The taxonomic utility of this gene segment
has now been revealed in a broad range of taxonomic groups. It is used in an integrated
bioinformatics platform that supports all phases of the analytical pathway from specimen
collection to tightly validated barcode library (Ratnasingham & Hebert 2007). Current research
using this approach is in progress for soil animals and preliminary results on collembolans
and earthworms are used for illustration. We believe that barcoding of soil animals, as a
complementary tool for morphological approaches, would support soil biologists in species
identifications, stimulate accurate soil biodiversity surveys or any ecological research based
on species lists, and help soil systematists to solve taxonomic as well as phylogenetic
problems.

Categoria do assunto: | --
Registro original: | Embrapa Florestas (CNPF)
Exemplares: | CNPF - (43688-1) - UPE - PL - -- - CD0305 -  -  - DIS