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Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex

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2019
4652.pdf (740.9Kb)
Authors
Vidaković, Danijela
Hamilton, Paul
Levkov, Zlatko
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Abstract
Freshwater diatom species Placoneis elginensis (W.Gregory) E.J.Cox was originally described in 1856 as Pinnularia elginensis W.Gregory. Because it is often confused with other species, its distribution requires closer investigation. The Placoneis elginensis species complex includes taxa with elliptic-lanceolate to linear-lanceolate valve shapes and capitate to rostrate apices. At present, six taxa are known from this complex: P. elginensis, P. paraelginensis Lange-Bertalot, P. abiskoensis (Hustedt) Lange-Bertalot & Metzeltin, P. ignorata (Schimanski) Lange-Bertalot, P. rostrata (A.Mayer) E.J.Cox and P. undulata (Østrup) Lange-Bertalot. Most of these taxa are widely distributed and rarely found in high numbers. They can occur in habitats with different environmental conditions, but mostly, they prefer mesotrophic to eutrophic waters with medium electrolyte content. During observations of different habitats (lakes, ponds, streams, wetlands, peat bogs) throughout North Macedonia seven spe...cies were recorded. In Taor cannel (near the city of Skopje), on mud, one new species from this complex was observed. It is characterized by elliptic-lanceolate valves with distinctly capitate apices, broad central area and distantly spaced striae (10–12 in 10 µm). All seven species are illustrated with LM and SEM and their morphological features are compared. Additionally, shape analyses of all species have been performed using software DiaOutline. For visualization and statistical evaluations, Principal Component Analyses (PCA), and Linear Discriminant Analyses (LDA) were used. Results showed that all analyzed species are significantly different with respect to the valve shape. Important separating features for the identification of species from this complex include valve shape, valve margin, shape of the valve apices and stria density.

Keywords:
Freshwater / diatoms / ecology
Source:
Programme and book of abstracts - 12th Central European Diatom Meeting, 2019, 58-58
Publisher:
  • Belvaux, Luxembourg : Luxembourg Institute of Science and Technology
Note:
  • 12th Central European Diatom meeting, Belvaux, Luxembourg, 26-27 March 2019

ISBN: 9789072619020

[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_cer_4652
URI
https://www.ced2019.lu/fileadmin/files/Documents/CED_2019_abstractbook.pdf
https://cer.ihtm.bg.ac.rs/handle/123456789/4652
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - CONF
AU  - Vidaković, Danijela
AU  - Hamilton, Paul
AU  - Levkov, Zlatko
PY  - 2019
UR  - https://www.ced2019.lu/fileadmin/files/Documents/CED_2019_abstractbook.pdf
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4652
AB  - Freshwater diatom species Placoneis elginensis (W.Gregory) E.J.Cox was originally described in 1856 as Pinnularia elginensis W.Gregory. Because it is often confused with other species, its distribution requires closer investigation. The Placoneis elginensis species complex includes taxa with elliptic-lanceolate to linear-lanceolate valve shapes and capitate to rostrate apices. At present, six taxa are known from this complex: P. elginensis, P. paraelginensis Lange-Bertalot, P. abiskoensis (Hustedt) Lange-Bertalot & Metzeltin, P. ignorata (Schimanski) Lange-Bertalot, P. rostrata (A.Mayer) E.J.Cox and P. undulata (Østrup) Lange-Bertalot. Most of these taxa are widely distributed and rarely found in high numbers. They can occur in habitats with different environmental conditions, but mostly, they prefer mesotrophic to eutrophic waters with medium electrolyte content. During observations of different habitats (lakes, ponds, streams, wetlands, peat bogs) throughout North Macedonia seven species were recorded. In Taor cannel (near the city of Skopje), on mud, one new species from this complex was observed. It is characterized by elliptic-lanceolate valves with distinctly capitate apices, broad central area and distantly spaced striae (10–12 in 10 µm). All seven species are illustrated with LM and SEM and their morphological features are compared. Additionally, shape analyses of all species have been performed using software DiaOutline. For visualization and statistical evaluations, Principal Component Analyses (PCA), and Linear Discriminant Analyses (LDA) were used. Results showed that all analyzed species are significantly different with respect to the valve shape. Important separating features for the identification of species from this complex include valve shape, valve margin, shape of the valve apices and stria density.
PB  - Belvaux, Luxembourg : Luxembourg Institute of Science and Technology
C3  - Programme and book of abstracts - 12th Central European Diatom Meeting
T1  - Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex
SP  - 58
EP  - 58
UR  - https://hdl.handle.net/21.15107/rcub_cer_4652
ER  - 
@conference{
author = "Vidaković, Danijela and Hamilton, Paul and Levkov, Zlatko",
year = "2019",
abstract = "Freshwater diatom species Placoneis elginensis (W.Gregory) E.J.Cox was originally described in 1856 as Pinnularia elginensis W.Gregory. Because it is often confused with other species, its distribution requires closer investigation. The Placoneis elginensis species complex includes taxa with elliptic-lanceolate to linear-lanceolate valve shapes and capitate to rostrate apices. At present, six taxa are known from this complex: P. elginensis, P. paraelginensis Lange-Bertalot, P. abiskoensis (Hustedt) Lange-Bertalot & Metzeltin, P. ignorata (Schimanski) Lange-Bertalot, P. rostrata (A.Mayer) E.J.Cox and P. undulata (Østrup) Lange-Bertalot. Most of these taxa are widely distributed and rarely found in high numbers. They can occur in habitats with different environmental conditions, but mostly, they prefer mesotrophic to eutrophic waters with medium electrolyte content. During observations of different habitats (lakes, ponds, streams, wetlands, peat bogs) throughout North Macedonia seven species were recorded. In Taor cannel (near the city of Skopje), on mud, one new species from this complex was observed. It is characterized by elliptic-lanceolate valves with distinctly capitate apices, broad central area and distantly spaced striae (10–12 in 10 µm). All seven species are illustrated with LM and SEM and their morphological features are compared. Additionally, shape analyses of all species have been performed using software DiaOutline. For visualization and statistical evaluations, Principal Component Analyses (PCA), and Linear Discriminant Analyses (LDA) were used. Results showed that all analyzed species are significantly different with respect to the valve shape. Important separating features for the identification of species from this complex include valve shape, valve margin, shape of the valve apices and stria density.",
publisher = "Belvaux, Luxembourg : Luxembourg Institute of Science and Technology",
journal = "Programme and book of abstracts - 12th Central European Diatom Meeting",
title = "Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex",
pages = "58-58",
url = "https://hdl.handle.net/21.15107/rcub_cer_4652"
}
Vidaković, D., Hamilton, P.,& Levkov, Z.. (2019). Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex. in Programme and book of abstracts - 12th Central European Diatom Meeting
Belvaux, Luxembourg : Luxembourg Institute of Science and Technology., 58-58.
https://hdl.handle.net/21.15107/rcub_cer_4652
Vidaković D, Hamilton P, Levkov Z. Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex. in Programme and book of abstracts - 12th Central European Diatom Meeting. 2019;:58-58.
https://hdl.handle.net/21.15107/rcub_cer_4652 .
Vidaković, Danijela, Hamilton, Paul, Levkov, Zlatko, "Morphological variation within the Placoneis elginensis (W.Gregory) E.J.Cox species complex" in Programme and book of abstracts - 12th Central European Diatom Meeting (2019):58-58,
https://hdl.handle.net/21.15107/rcub_cer_4652 .

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