Are benthic algae related to spring types?

Cantonati, Marco; Rott, Eugen; Spitale, Daniel; Angeli, Nicola; Komarek, Jir ˇ i

doi:10.1899/11-048.1

Cited by 36 publications

(29 citation statements)

References 55 publications

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“…These structures exhibit great variety in morphology and composition and may include diverse biofilms of immobilized microorganisms (Bauld, 1984). Cyanobacteria and diatoms are emphasized as the key organisms comprising microbial mats in spring habitats (Esposito et al, 2006;Stal, 2012;Cantonati et al, 2012Cantonati et al, , 2015Cantonati et al, , 2016, where these prokaryotic-eukaryotic interactions play an important role in microbial mat development by enabling significant photosynthetic activity (Elster and Komárek, 2003) and nutrient cycling and acquisition (Gooseff et al, 2004;McKnight et al, 2004;Mueller and Vincent, 2006). Their remarkable adaptability, through which they can overcome the extremity of environmental conditions prevailing in many carbonate-rock springs, makes them one of the key components in terms of ecology, management and conservation of spring ecosystems .…”

Section: Introductionmentioning

confidence: 99%

“…Most studies addressing cyanobacterial and diatom communities in karst springs have examined mostly perennial streams, rarely springheads, and have ignored intermittent springs (Cantonati et al, 2012(Cantonati et al, , 2016. Their ecological role as the food source and shelter for freshwater invertebrates is still poorly understood (Camacho and Thacker, 2013;Lévesque et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Microbial mats as shelter microhabitat for amphipods in an intermittent karstic spring

Žutinić

Petrić

Gottstein

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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-Microbial mats represent complex communities where cyanobacteria and diatoms as key organisms provide shelter for diverse assemblages of aquatic invertebrates, like the small stygophilous amphipod Synurella ambulans. Studies addressing such communities in the karst springs have rarely examined springheads, and have ignored intermittent springs. During high flow conditions the stygophilic crustaceans are flushed to the surface of a temporary stream Krčić where microbial mats prevent their drift and enables their successful retreat into underground in the periods of drought. The objective of this study was to characterize the microbial mat community of the Krčić Spring as a shelter for S. ambulans during strong current and high water level. Representative samples for diatom and cyanobacterial species identification and composition, as well as the fresh mat material for potential animal activity and cyanobacterial phylogenetic analysis were collected. The most dominant diatom was Achnanthidium minutissimum, whilst Fragilaria capucina, Meridion circulare, Navicula cryptocephala and Nitzschia palea had abundance greater than 0.5%. Morphological observations of cyanobacteria revealed that Phormidium favosum was the most dominant, with Hydrocoleum muscicola as a subdominant. Cyanobacterial phylogenetic relationship revealed two distinct clusters: (i) "Phormidium cluster", confirming morphological observations in both winter and spring samples, and (ii) "Wilmottia cluster", a first report for Croatia and found exclusively in the winter sample. Laboratory observations revealed a small stygophilic amphipod S. ambulans, hiding and feeding inside the pockets of fresh microbial mat. The intermittent Krčić Spring as a predator-free and competitor-free ecosystem provides a spatiotemporal conformity between microbial mat and stygophilous amphipod.Keywords: Microbial mat / cyanobacteria / diatoms / amphipods / karstic spring Résumé -Le tapis microbien comme microhabitat refuge pour les amphipodes dans une source karstique intermittente. Le tapis microbien représente des communautés complexes où les cyanobactéries et les diatomées, en tant qu'organismes clés, abritent divers assemblages d'invertébrés aquatiques, comme les petits amphipodes stygophiles Synurella ambulans. Les études portant sur ces communautés dans les sources karstiques ont rarement examiné ces têtes de ruisseaux et ont ignoré les sources intermittentes. Dans les conditions d'écoulement fort, les crustacés stygophiles sont chassés à la surface d'un ruisseau temporaire Krčić où les tapis microbiens empêchent leur dérive et permettent leur retrait dans le sous-sol en période de sécheresse. L'objectif de cette étude était de caractériser la communauté du tapis microbien de la source Krčić comme abri pour S. ambulans lors de forts courants et de niveaux d'eau élevés. La diatomée la plus dominante était Achnanthidium minutissimum, tandis que Fragilaria capucina, Meridion circulare, Navicula cryptocephala et Nitzschia palea avaient une abondance supérieure à ...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microbial mats as shelter microhabitat for amphipods in an intermittent karstic spring

Žutinić

Petrić

Gottstein

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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“…Hildenbrandia rivularis used to be well-known from streams but Cantonati et al (2012b) list it as a characteristic species of the spring type "Low-altitude, mostly shaded, N-enriched rheocrenes on carbonate substratum". In Poland it is considered rare and is protected (e.g., JakubaS et al 2014) but its first report in central Poland occurred in a spring head (Żelazna-wieCZorek & ZiulkiewiCZ 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The light regime, understood as a range of fluctuations, intensity, quality, and photoperiod, affect the seasonality of freshwater red algae (SHeatH & burkHolder 1985). Like many red algae, H. rivularis is often found in shaded habitats / microhabitats, being adapted to survive in low-light (bourrelly 1955;StarMaCH 1969;roS et al 1997), and showing a preference for low-light regimes (kreMer 1983;Sabater et al 1989;SHeatH & HaMbrook 1990;leukart & Hanelt 1995;neCCHi & ZuCCHi 2001;eloranta & kwandranS 2004;Cantonati et al 2012b;CeSCHin et al 2013). Our study showed that when shading is too high, Chl-a values were lower than those measured in the presence of more abundant light.…”

Section: Discussionmentioning

confidence: 99%

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Exploring the contrasting seasonal strategies of two crenic macroalgae

Cantonati¹,

Spitale²,

Scalfi³

et al. 2016

Fottea

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Most studies on springs assumed stability, and reduced seasonal changes in the biota. We focused on two macroalgae (the rhodophyte Hildenbrandia rivularis and the chrysophyte Hydrurus foetidus) to unveil their seasonal-development patterns in springs. H. rivularis cover remained virtually constant throughout the year, although seasonal fluctuations in ecophysiological parameters were detected. The most important determinant of seasonal changes in H. rivularis was shown to be the complex interplay between solar radiation (day length) and shading. Negative cross-correlation between Chl-a and shading was found to be significant but with a time lag. H. foetidus seasonal changes were evident both at the macroscopic level and in ecophysiological parameters. Interestingly, it occurred throughout the year in the spring whilst it completely disappeared in summer in a nearby glacial stream. Unexpectedly, variability of ecophysiological parameters (coefficients of variation) was shown to be 15-20% higher in H. rivularis than in H. foetidus.

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Biogeography of River Algae

Vis

2016

River Algae

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Are benthic algae related to spring types?

Cited by 36 publications

References 55 publications

Microbial mats as shelter microhabitat for amphipods in an intermittent karstic spring

Microbial mats as shelter microhabitat for amphipods in an intermittent karstic spring

Exploring the contrasting seasonal strategies of two crenic macroalgae

Biogeography of River Algae

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