Digitale Bibliotheek
Sluiten Bladeren door artikelen uit een tijdschrift
   volgende >>
     Tijdschrift beschrijving
       Alle jaargangen van het bijbehorende tijdschrift
         Alle afleveringen van het bijbehorende jaargang
           Alle artikelen van de bijbehorende aflevering
                                       Details van artikel 1 van 8 gevonden artikelen
  Analytical Bias in Taphonomic Studies of Macro-invertebrates: (Paleo)Environmental and (Paleo)Ecological Implications
Titel: Analytical Bias in Taphonomic Studies of Macro-invertebrates: (Paleo)Environmental and (Paleo)Ecological Implications
Auteur: Sabrina Coelho Rodrigues
Marcello Guimarães Simões
Ricardo Angelim Pires-Domingues
Verschenen in: Geologia USP. série científica
Paginering: Jaargang 9 (2009) nr. 1 pagina's 101-114
Jaar: 2009
Inhoud: A review of recent literature shows that most taphonomic studies of Holocene and fossil macrovertebrates are not methodologicallystandardized. Hence, results from distinct studies are not comparable, even among researches sharing virtually identical goals, targetingthe same biological group of similar age and depositional environment. The effects of the shell size in the taphonomic analysis arestill poorly understood. In order to study this issue, the taphonomic signatures (articulation, valve type, fragmentation, abrasion, corrosion,edge modifi cation, color alteration, bioerosion and encrustation) of brachiopod shells [Bouchardia rosea (Mawe)], from UbatubaBay in the northern coast of São Paulo State, were investigated according to the sieve sizes. In the study area, 14 collecting stationswere sampled via Van Veen grab sampler, along a bathymetric gradient, ranging from 0 to 35 m of depth. Bulk samples weresieved through 8 mm, 6 mm, and 2 mm mesh sizes, yielding a total of 5.204 shells. The results indicate that, when taphonomic signatureswere independently analyzed per size classes (8 mm, 6 mm, and 2 mm), the taphonomic signatures are recorded in a complex andrandom way. Additionally, cluster analysis showed that the similarity among the clusters vary according to the considered sieve size. Thus, the sieve size plays an important role in the distribution of taphonomic signatures in shells of distinct sizes. These results suggest that the concentration of the taphonomic analysis on one class (e.g., the largest sieve size, 8 mm) is not always the best method. Rather, the total data (all sieves included) seems more accurate in recording the whole spectrum of taphonomic processes recorded in shells of a given assemblage.
Uitgever: Instituto de Geociências da USP (provided by DOAJ)
Bronbestand: Elektronische Wetenschappelijke Tijdschriften

                             Details van artikel 1 van 8 gevonden artikelen
   volgende >>
 Koninklijke Bibliotheek - Nationale Bibliotheek van Nederland