Diversity of Microscopic Green Algae (Chlorophyta) in Calcifying Biofilms of Two Karstic Streams in Germany

Hodač, Ladislav; Brinkmann, Nicole; Mohr, Kathrin I.; Arp, Gernot; Hallmann, Christine; Ramm, Jessica; Spitzer, Karolin; Friedl, Thomas

doi:10.1080/01490451.2013.878418

Cited by 25 publications

(8 citation statements)

References 47 publications

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“…In the class of Pyramimonadophyceae there exist phytoplankton quite important in the marine food web (Jónasdóttir, 2019) while microalgae belonging to other underrepresented classes (Ulvophyceae, Chlorophyceae, Trebouxiophyceae etc.) play important role in the food web of streams (Hodač et al, 2015). Collecting more data records in those marginally represented classes will surely enable e cient data use and contribute to the conservation and sustainable use of their biodiversity.…”

Section: -Discussion and Conclusionmentioning

confidence: 99%

Biodiversity conservation in the digital age, will Africa meet the challenge?

Ganglo

2022

Preprint

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Digital accessible Knowledge (DAK) is of utmost importance for biodiversity conservation; indeed, their use are indispensable to provide evidence and strategies to support decision-making on natural resource management and sustainable use. The Global Biodiversity Information Facility (GBIF, www.gbif.org) is a mega data infrastructure with more than two billion occurrence records as of 28th May 2022. It is by far the largest initiative assembling and sharing DAK to support scientific research, conservation, and sustainable development. We decided to analyze plant data published on GBIF site at the scale of Africa. This will highlight the contribution of the continent to GBIF and thereby underline data gaps across taxonomic groups, basis of records, and geographic space. In order to achieve our purpose, we downloaded data of the Plantae kingdom from Africa. They are available at https://doi.org/10.15468/dl.f79228. We achieved data treatment and analysis using R, several packages and related functions. Although Africa is home to a rich biodiversity with many hotspots, the global data contribution of Africa to GBIF is still incredibly low (1.37%). Furthermore, there are huge disparities between African countries with South Africa contributing alone for 65% of the data of the continent. The plant data of Africa (2,713,790 occurrence records) accounted for 9.11% of the data of the continent; this underlines huge gaps between taxonomic groups. Furthermore, the Magnoliopsida is the dominant plant class with the highest number of records (79.62%) and the highest number of species (71.85%) followed by the Liliopsida with 15.10% of the records and 18.16% of the species. Two basis of records were dominant: preserved specimens (75.49%) and human observation (18.60%). In geographic space, plant data gaps are also quite huge across the continent at either spatial resolution (half degree or one degree spatial grid cells); data completeness is more achieved in West Africa, East Africa, Southern Africa, and Madagascar. The huge multidimensional data gaps identified in this study should be in priority addressed in the future data collections. Accessibility either by roads or waterways and protected areas are underpinning factors of data completeness across the continent. We deplored important data loss during the process of data cleaning; indeed the total number of records with adequate coordinates accounted for 71.03% of the initial data while the data fitness for use in completeness analysis (records with adequate coordinates and full dates) are only about 65% of the total data records initially downloaded.

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Section: -Discussion and Conclusionmentioning

confidence: 99%

Biodiversity conservation in the digital age, will Africa meet the challenge?

Ganglo

2022

Preprint

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“…In the class Pyramimonadophyceae, phytoplankton are quite important in the marine food web (Jónasdóttir, 2019), while microalgae belonging to other underrepresented classes (Ulvophyceae, Chlorophyceae, Trebouxiophyceae, etc.) play an important role in the food web of streams (Hodač et al, 2015). Collecting more data records in those marginally represented classes will surely enable e cient data use and contribute to the conservation and sustainable use of their biodiversity.…”

Section: -Discussion and Conclusionmentioning

confidence: 99%

Will Africa meet the challenge of biodiversity conservation in the digital age?

Ganglo

2022

Preprint

View full text Add to dashboard Cite

Digital accessible knowledge (DAK) is of utmost importance for biodiversity conservation; indeed, its use is indispensable to provide evidence and strategies to support decision-making on natural resource management and sustainable use. The Global Biodiversity Information Facility (GBIF, www.gbif.org) is a mega data infrastructure with more than two billion occurrence records as of 28 May 2022. It is by far the largest initiative assembling and sharing DAK to support scientific research, conservation, and sustainable development. We decided to analyze plant data published at the GBIF site at the scale of Africa. This will highlight the contribution of the continent to the GBIF and thereby underline data gaps across taxonomic groups, the basis of records, and geographic space. To achieve our purpose, we downloaded data from the Plantae kingdom from Africa. They are available at https://doi.org/10.15468/dl.f79228. We achieved data treatment and analysis using R, several packages and related functions. Although Africa is home to rich biodiversity with many hotspots, the global data contribution of Africa to the GBIF is still incredibly low (1.37%). Furthermore, there are huge disparities between African countries, with South Africa contributing alone for 65% of the data of the continent. The plant data of Africa (2,713,790 occurrence records) accounted for 9.11% of the data of the continent; this underlines huge gaps between taxonomic groups. Furthermore, Magnoliopsida was the dominant plant class with the highest number of records (79.62%) and the highest number of species (71.85%), followed by Liliopsida, with 15.10% of the records and 18.16% of the species. Two sources of records were dominant: preserved specimens (75.49%) and human observation (18.60%). In geographic space, plant data gaps are also quite large across the continent at either spatial resolution (half degree or one degree spatial grid cells); data completeness is more achieved in West Africa, East Africa, Southern Africa, and Madagascar. The large multidimensional data gaps identified in this study should be a priority addressed in future data collections. Accessibility either by roads or waterways and protected areas are underpinning factors of data completeness across the continent. We deplored important data loss during the process of data cleaning; indeed, the total number of records with adequate coordinates accounted for 71.03% of the initial data, while the data fitness for use in completeness analysis (records with adequate coordinates and full dates) was only approximately 65% of the total data records initially downloaded.

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“…Since several decades, the cave microbiome has been studied for several reasons [14] such as medical or pharmaceutical interests (e.g., research of antibio lm compounds) [15] and cave preservation (e.g., Paleolithic drawings and rock paintings curation) [16,17,18]. These studies have been carried out using a large set of microorganism identi cation technics such as microscopic methods [19,20], isolation and culture in laboratory [21], cloning followed by Sanger sequencing [22,23,24], ampli ed ribosomal DNA restriction analysis [25] or high throughput sequencing [6,26,27,28]. Results of these studies have demonstrated that cave microorganisms developing inside bio lms may be involved in speleogenesis processes.…”

Section: Introductionmentioning

confidence: 99%

“…Results of these studies have demonstrated that cave microorganisms developing inside bio lms may be involved in speleogenesis processes. Indeed, it has been reported that the complex microbial communities are capable of re ecting in substantial rock alterations, involved in calci cation processes [21,29,30,31], formation of new structures [32], corrosion of the mineral surfaces [4] and cave expansion [1,33]. Thus, the biodeterioration process is of great concern to cave owners and managers who nd themselves faced with a dual problem: the esthetic impact of bio lms [34,35,36] and the biodeterioration [31,37].…”

Section: Introductionmentioning

confidence: 99%

Does Microbial Diversity of Cave Ecosystems Differ from Outside? The Case of the Azé Show Cave (France)

Alaoui-Sossé¹,

Ozaki²,

Barriquand³

et al. 2021

Preprint

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In recent decades, the Azé cave has begun to suffer from microorganism proliferation due to artificial lighting installations for touristic activity. The present work aims at understanding the origin of the Lampenflora and bacterial community populating inside the cave. We performed high throughput sequencing of the communities populating the outside, the entrance and the inside of the Azé cave. Our results indicated that 68.2–74.5% of the phototrophic community was represented by Eukaryotes, and 25.5 to 31.8% by cyanobacteria regardless of the sampled area. We observed a decrease of bacterial and phototroph species richness from the outside to the bottom of the cave. The phototrophic communities were significantly different in term of specific OTU richness but not in term of composition. For photosynthetic organisms, only 4 OTU were specific to the inside of the cave, representing less than 0.1% of the total OTUs. On the contrary, more than 400 bacterial OTUs were specific to the inside of the cave. These metabarcoding-based findings in the Azé cave revealed a complex community structure that is similar but less diverse in comparison to the outside.

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Diversity of Microscopic Green Algae (Chlorophyta) in Calcifying Biofilms of Two Karstic Streams in Germany

Cited by 25 publications

References 47 publications

Biodiversity conservation in the digital age, will Africa meet the challenge?

Biodiversity conservation in the digital age, will Africa meet the challenge?

Will Africa meet the challenge of biodiversity conservation in the digital age?

Does Microbial Diversity of Cave Ecosystems Differ from Outside? The Case of the Azé Show Cave (France)

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