Accesso libero

Chamaepinnularia thermophila (Bacillariophyceae): synonymy with Navicula tongatensis Hustedt and update of its geographic distribution and ecology

Giuseppina Grazia Lai
Giuseppina Grazia Lai
, 
Luc Ector
Luc Ector
, 
Bachisio Mario Padedda
Bachisio Mario Padedda
, 
Antonella Lugliè
Antonella Lugliè
 e 
Carlos Eduardo Wetzel
Carlos Eduardo Wetzel
   | 03 giu 2019
Oceanological and Hydrobiological Studies's Cover Image
INFORMAZIONI SU QUESTO ARTICOLO
Articolo precedente
Articolo Successivo
Cita
Article Category: Original research paper
Pubblicato online: 03 giu 2019
Pagine: 105 - 115
Ricevuto: 08 set 2018
Accettato: 26 ott 2018
DOI: https://doi.org/10.1515/ohs-2019-0011
© 2019 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Geographic location and photo of the San Giovanni Su Anzu thermo-mineral spring (Sardinia, Italy)
Geographic location and photo of the San Giovanni Su Anzu thermo-mineral spring (Sardinia, Italy)

Figure 2(a–v)

Fig. 2(a–t). Light microscopy (LM). Chamaepinnularia thermophila from the San Giovanni Su Anzu spring. Fig. 2(u–v). Scanning electron microscopy (SEM). Chamaepinnularia thermophila from the San Giovanni Su Anzu spring. Fig. 2(u–v): external views. Valves showing the straight raphe, with distal ends bent toward the same side, the central silica nodule and striae slightly radiate. Fig. 2v: internal view. Valve showing three large areolae interrupted by the silica deposition along the apical plane
Fig. 2(a–t). Light microscopy (LM). Chamaepinnularia thermophila from the San Giovanni Su Anzu spring. Fig. 2(u–v). Scanning electron microscopy (SEM). Chamaepinnularia thermophila from the San Giovanni Su Anzu spring. Fig. 2(u–v): external views. Valves showing the straight raphe, with distal ends bent toward the same side, the central silica nodule and striae slightly radiate. Fig. 2v: internal view. Valve showing three large areolae interrupted by the silica deposition along the apical plane

Figure 3(a–u)

Fig. 3a: Reproduction of the holotype material illustrated in Hustedt (1962) – Fig. 1345: a, b 2000/1, c, d 1000/1. Fig. 3(b–q): Light microscopy (LM). Navicula tongatensis Hustedt 1962 from his original material. Fig. 3(r–u): Scanning electron microscopy (SEM). Navicula tongatensis Hustedt 1962 from his original material. Fig. 3r: external view. Frustule showing unperforated girdle bands. Fig. 3(s–t): external views. Valves showing the radiate striae composed of three or four areolae and the straight raphe, with distal ends bent toward the same side. Fig. 3u: internal views. Valves showing the areolae interrupted by the silica deposition along the apical plane
Fig. 3a: Reproduction of the holotype material illustrated in Hustedt (1962) – Fig. 1345: a, b 2000/1, c, d 1000/1. Fig. 3(b–q): Light microscopy (LM). Navicula tongatensis Hustedt 1962 from his original material. Fig. 3(r–u): Scanning electron microscopy (SEM). Navicula tongatensis Hustedt 1962 from his original material. Fig. 3r: external view. Frustule showing unperforated girdle bands. Fig. 3(s–t): external views. Valves showing the radiate striae composed of three or four areolae and the straight raphe, with distal ends bent toward the same side. Fig. 3u: internal views. Valves showing the areolae interrupted by the silica deposition along the apical plane

Figure 4

Seasonal abundance of Chamaepinnularia thermophila on the three investigated substrates from the San Giovanni Su Anzu spring (Sardinia, Italy)
Seasonal abundance of Chamaepinnularia thermophila on the three investigated substrates from the San Giovanni Su Anzu spring (Sardinia, Italy)

Figure 5

Species composition based on five most abundant taxa associated with Chamaepinnularia thermophila for each substrate and season. Acronyms of the species: ADMI = Achnanthidium minutissimum (Kützing) Czarnecki; CFEU = Cocconeis feuerbornii Hustedt; CFON = Caloneis fontinalis (Grunow) Cleve-Euler; GOMS = Gomphonema sp.; HLMO = Halamphora montana (Krasske) Levkov; NAMP = Nitzschia amphibia Grunow; NCIN = Navicula cincta (Ehrenberg) Ralfs; NINC = Nitzschia inconspicua Grunow; PROH = Planothidium rostratoholarcticum Lange-Bertalot & Bąk; SNIG = Sellaphora nigri (De Notaris) C.E.Wetzel & Ector; SSGE = Sellaphora saugerresii (Desmazières) C.E.Wetzel & D.G.Mann; UULN = Ulnaria ulna (Nitzsch) Compère
Species composition based on five most abundant taxa associated with Chamaepinnularia thermophila for each substrate and season. Acronyms of the species: ADMI = Achnanthidium minutissimum (Kützing) Czarnecki; CFEU = Cocconeis feuerbornii Hustedt; CFON = Caloneis fontinalis (Grunow) Cleve-Euler; GOMS = Gomphonema sp.; HLMO = Halamphora montana (Krasske) Levkov; NAMP = Nitzschia amphibia Grunow; NCIN = Navicula cincta (Ehrenberg) Ralfs; NINC = Nitzschia inconspicua Grunow; PROH = Planothidium rostratoholarcticum Lange-Bertalot & Bąk; SNIG = Sellaphora nigri (De Notaris) C.E.Wetzel & Ector; SSGE = Sellaphora saugerresii (Desmazières) C.E.Wetzel & D.G.Mann; UULN = Ulnaria ulna (Nitzsch) Compère

Figure 6

Map of Chamaepinnularia thermophila sites in various parts of the world. Brown circles: Quaternary sections; orange circles: thermal waters (springs and well); uncolored circles: unknown type
Map of Chamaepinnularia thermophila sites in various parts of the world. Brown circles: Quaternary sections; orange circles: thermal waters (springs and well); uncolored circles: unknown type

Physical and chemical variables of the sites with Chamaepinnularia thermophila (including the new site of the San Giovanni Su Anzu spring in Sardinia, Italy), relative abundance of the species and occurrence on different substrates

Variables Units Country
Guadalupe Martinique Sardinia
Spring sites
Chute du Carbet La Lise Sucrerie San Giovanni Su Anzu
Temperature °C 44.9 44.9 26.4 29.3–30
Discharge Is- 1 0.489–0.651
Mean water depth cm 6–7.3
pH 6.51 7.33 7.92 7.26–7.30
Alkalinity meq l-1 3.8–4.7
Conductivity μS cm-1 1558 570–590
Dissolved Oxygen 7.07 7.2–8.7
Oxygen saturation % saturation 89.2 95–114
BOD5 mg O2 l-1 1.0–3.3
Cl 368 27.5 42.5–46.1
Total hardness mg CaCO3 l-1 235–235
Reactive phosphorus 16–24
Total phosphorus μg P l-1 37–78
N-NO2- μg N l–1 4–6
N-NO3 200 1140 2448–2932
N-NH4 3–8
Total nitrogen 3743–6244
Reactive silica mg Si l–1 110 72 7.53–8.65
Suspended solids mg l–1 0–1.8
Br- < D.L.0.4
Ca2+ 188 13.4 44–44
F <D.L.–0.1
Fe2+ 0.04–0.04
HCO3- 125 132 254.4–274.5
K+ 24 3.89 1.7–2.2
Mg2 + 64.9 4.84 30.4–30.9
Mn2 + n.d. 0.011 0.04–0.05
Na+ 116.2 41.9 26–27.3
SO42 - 303 5.69 8.0–9.8
% C. thermophila 10–50% < 10% 55 0.9–10.8
Substrate cob cob/mac/sed

Main characteristics and the type locality of Navicula thermophila and Navicula tongatensis reported in the original descriptions of the species

Navicula thermophila Manguin in Bourrelly & Manguin 1952 Navicula tongatensis Hustedt 1962
Valve outline elliptic linear-elliptic
Ends capitate sub-capitate
Raphe straight, filiform
Striae radiate, more spaced in the middle slightly radiate, more spaced in the middle
Central area sub-quadratic
Length (μm) 7.2–8.0 6.0–8.0
Width (μm) 2.5–3.0 2.5
Striae/10 μm 29–30 26–28
Type locality hot-salt spring thermal well
eISSN:
1897-3191
Lingua:
Inglese
Frequenza di pubblicazione:
4 volte all'anno
Argomenti della rivista:
Chemistry, other, Geosciences, Life Sciences
Feed RSS della rivista