Graphical methods comparing living and dead assemblages, exemplified with benthic foraminifera from the Aveiro Lagoon, Portugal

Autor(en)

J. Hohenegger, M.V.A. Martins, W. Eder, T. M. Senez-Mello, F. L. Damasceno, L. Laut

Abstrakt

This work introduces graphical methods documenting density, diversity (species richness combined with heterogeneity) and similarity in combined diagrams for estimating the influence of environmental and taphonomic factors in living (LAs) and dead (DAs) assemblages. In this paper, the diagrams compare: 1) densities per 1 g of sediment expressed in cubic squares; 2) diversities based on rarefaction species richness (x-axis) and Shannon H rarefaction (y-axis), both extended to infinity by the logistic Hull equation, and 3) similarity diagrams based on cosine measures (x-axis) and Spearman correlation coefficients (y-axis). Diagrams were exemplified for LAs and DAs found at 53 stations along channels and intertidal areas of the Aveiro Lagoon (Portugal). Eight ‘routes’ characterized by different trends in the distribution of the analyzed biotic parameters were recognized in six regions of the Aveiro Lagoon: ‘port area’, ‘central lagoon’, ‘northeast lagoon’, ‘northern and southern extremities of the lagoon’ and ‘city area’. In addition, Detrended Correspondence Analyses (DCA) based on diversity diagrams were performed to show the influence of environmental parameters, especially grain size, salinity, and pH, on the average species composition in each route. The comparative diagrams allow deduction about the impact of parameters that simultaneously affect LAs and DAs, such as hydrodynamics, post-mortem tests dissolution, physicochemical parameters, excessive contribution of organic matter, oxygen depletion, and pollution by metals. Based on these diagrams, the most favorable environments due to the most remarkable development and diversity of LAs and DAs are located in protected coves of the Aveiro Lagoon mouth.

Organisation(en)

Institut für Paläontologie

Externe Organisation(en)

Universidade do Estado do Rio de Janeiro, University of Aveiro, Universidade Federal Fluminense, Universidade Federal do Estado do Rio de Janeiro

Journal

Marine Micropaleontology

Band

182

ISSN

0377-8398

DOI

https://doi.org/10.1016/j.marmicro.2023.102257

Publikationsdatum

06-2023

Peer-reviewed

Ja

ÖFOS 2012

105118 Paläontologie

Schlagwörter

ASJC Scopus Sachgebiete

Oceanography, Palaeontology

Sustainable Development Goals

SDG 11 – Nachhaltige Städte und Gemeinden

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/graphical-methods-comparing-living-and-dead-assemblages-exemplified-with-benthic-foraminifera-from-the-aveiro-lagoon-portugal(fa4c2566-11b5-468c-b7c1-e05fd68c1510).html