Unexpectedly high bacteriochlorophyll <i>a</i> concentrations in neotropical tank bromeliads

Lehours, Anne‐Catherine; Jeune, Anne‐Hélène Le; Aguer, Jean‐Pierre; Céréghino, Régis; Corbara, Bruno; Kéraval, Benoit; Leroy, Céline; Perrière, Fanny; Jeanthon, Christian; Carrias, Jean‐François

doi:10.1111/1758-2229.12426

Cited by 11 publications

(20 citation statements)

References 67 publications

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“…While we detected Rhizomicrobium electricum, a known iron and fumarate respirer (Kodama and Watanabe, 2011), at low densities in almost all bromeliads, none of the identified anoxygenic photoautotrophs are known to oxidize iron. High abundances of anoxygenic phototrophspecific pufM genes, affiliated with purple non-sulfur bacteria and purple sulfur bacteria, were found previously and concurrently with high bacteriochlorophyll a concentrations in several bromeliads (including two Aechmea species; Lehours et al (2016)). Photoheterotrophs or, more generally, anoxygenic phototrophs thus appear to be widespread and important functional groups in bromeliad tanks.…”

Section: Functional Structure Of Microbial Communitiesmentioning

confidence: 60%

“…High abundances of anoxygenic phototroph‐specific pufM genes, affiliated with purple non‐sulfur bacteria and purple sulfur bacteria, were found previously and concurrently with high bacteriochlorophyll a concentrations in several bromeliads (including two Aechmea species; Lehours et al . ()). Photoheterotrophs or, more generally, anoxygenic phototrophs thus appear to be widespread and important functional groups in bromeliad tanks.…”

Section: Resultsmentioning

confidence: 99%

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Functional structure of the bromeliad tank microbiome is strongly shaped by local geochemical conditions

Louca

Jacques

Pires

et al. 2017

Environmental Microbiology

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Phytotelmata in tank-forming Bromeliaceae plants are regarded as potential miniature models for aquatic ecology, but detailed investigations of their microbial communities are rare. Hence, the biogeochemistry in bromeliad tanks remains poorly understood. Here we investigate the structure of bacterial and archaeal communities inhabiting the detritus within the tanks of two bromeliad species, Aechmea nudicaulis and Neoregelia cruenta, from a Brazilian sand dune forest. We used metagenomic sequencing for functional community profiling and 16S sequencing for taxonomic profiling. We estimated the correlation between functional groups and various environmental variables, and compared communities between bromeliad species. In all bromeliads, microbial communities spanned a metabolic network adapted to oxygen-limited conditions, including all denitrification steps, ammonification, sulfate respiration, methanogenesis, reductive acetogenesis and anoxygenic phototrophy. Overall, CO2 reducers dominated in abundance over sulfate reducers, and anoxygenic phototrophs largely outnumbered oxygenic photoautotrophs. Functional community structure correlated strongly with environmental variables, between and within a single bromeliad species. Methanogens and reductive acetogens correlated with detrital volume and canopy coverage, and exhibited higher relative abundances in N. cruenta. A comparison of bromeliads to freshwater lake sediments and soil from around the world, revealed stark differences in terms of taxonomic as well as functional microbial community structure.

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Section: Functional Structure Of Microbial Communitiesmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

Functional structure of the bromeliad tank microbiome is strongly shaped by local geochemical conditions

Louca

Jacques

Pires

et al. 2017

Environmental Microbiology

View full text Add to dashboard Cite

show abstract

“…2011, 2015; Lehours et al. 2010) and associated it with acidic conditions and degradation. Klan et al.…”

Section: Discussionmentioning

confidence: 99%

Remarkably Complex Microbial Community Composition in Bromeliad Tank Waters Revealed by eDNA Metabarcoding

Simão

Utz

Dias³

et al. 2020

J Eukaryotic Microbiology

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To investigate patterns of biotic community composition at different spatial scales and biological contexts, we used environmental DNA metabarcoding to characterize eukaryotic and prokaryotic assemblages present in the phytotelmata of three bromeliad species (Aechmea gamosepala, Vriesea friburgensis, and Vriesea platynema) at a single Atlantic Forest site in southern Brazil. We sampled multiple individuals per species and multiple tanks from each individual, totalizing 30 samples. We observed very high levels of diversity in these communities, and remarkable variation across individuals and even among tanks from the same individual. The alpha diversity was higher for prokaryotes than eukaryotes, especially for A. gamosepala and V. platynema samples. Some biotic components appeared to be species‐specific, while most of the biota was shared among species, but varied substantially in frequency among samples. Interestingly, V. friburgensis communities (which were sampled at nearby locations) tended to be more heterogeneous across samples, for both eukaryotes and prokaryotes. The opposite was true for V. platynema, whose samples were more broadly spaced but whose communities were more similar to each other. Our results indicate that additional attention should be devoted to within‐individual heterogeneity when assessing bromeliad phytotelmata biodiversity, and highlight the complexity of the biotic assemblages gathered in these unique habitats.

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“…After a few days without rain, bromeliad tanks can dry out and remain so until the next rain event (Zotz and Thomas 1999). Conversely, in an almost constantly filled tank, organic decomposition can lead to prevailing anoxic conditions (Martinson et al 2010;Goffredi et al 2011;Lehours et al 2016) that are rarely interrupted by aerobic conditions during drier periods. Therefore, a low PREC and high TEMP can reduce the duration of flooded anoxic periods, promoting aerobic environments and increasing mass loss (Reddy and Patrick Jr 1975;Neckles and Neill 1994;Anderson and Smith 2002).…”

Section: Discussionmentioning

confidence: 99%

Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale

2020

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Plant litter decomposition is a key ecological process that is mostly studied at the forest floor. However, decomposition generally starts in the canopy. In this study, we evaluated the effect of litter composition and climate on the initial phase of decomposition in the soil and two contrasting types of canopy microsites along an elevational gradient (0–2200 m a.s.l.). To this end, we incubated standard material composed by green (fast decomposing) and rooibos (slow decomposing) tea bags for three months. Tea bags were placed in soil (buried at 5 cm) and in the canopy at ca. 5 m above the ground in “micro-wetlands” (tank bromeliads) and dry crown microsites (branches). Along the elevational gradient, green tea decomposed faster than rooibos tea in all microsites and forests. Mass loss for both tea types was lowest on branches at all sites, except for green tea in a wet forest where decomposition did not significantly differ among microsites. In wet forests, decomposition did not differ between bromeliads and soil, while in a dry forest, decomposition was faster in bromeliads. We found that the effects of climatic variables [monthly average temperature (TEMP) and total precipitation (PREC) for the incubation months] on decomposition differed between microsites. Along the elevational gradient, the mass loss in soil was positively correlated with TEMP but not with PREC, whereas on branches, mass loss was negatively correlated with TEMP and positively correlated with PREC. Unlike on branches, mass loss in bromeliads slightly decreased with PREC and increased with TEMP. Our study shows that microsite conditions interact with climate (TEMP and PREC) leading to differences in the general decomposition patterns in the forest canopy.

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Unexpectedly high bacteriochlorophyll a concentrations in neotropical tank bromeliads

Cited by 11 publications

References 67 publications

Functional structure of the bromeliad tank microbiome is strongly shaped by local geochemical conditions

Functional structure of the bromeliad tank microbiome is strongly shaped by local geochemical conditions

Remarkably Complex Microbial Community Composition in Bromeliad Tank Waters Revealed by eDNA Metabarcoding

Microsites and early litter decomposition patterns in the soil and forest canopy at regional scale

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