Person: Martín Cereceda, María Mercedes
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First Name
María Mercedes
Last Name
Martín Cereceda
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Department
Genética, Fisiología y Microbiología
Area
Microbiología
Identifiers
4 results
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Now showing 1 - 4 of 4
Item Rain-fed granite rock pools in a national park: extreme niches for protists(Limnetica, 2021) Pérez Uz, María Blanca; Velasco González, Ismael; Murciano, Antonio; Sánchez Jiménez, Abel; García-Rodriguez, M.; Centeno Carrillo, Juan de Dios; Montero González, Esperanza; Muñoz Araújo, Benito; Olmedo Salinas, Cristina; Quintela Alonso, Pablo; Refoyo Román, Pablo; Williams, Richard Alexander John; Martín Cereceda, María MercedesRain-fed granite rock pools are geological landforms with a worldwide distribution. However, their role as habitats for microorganisms has been barely explored. We carried out a detailed morphological inventory of the ciliated protists in the sediments of three granite rain-fed rock pools from a Spanish National Park. The ciliate seed bank in the rock pools comprised 54 morphospecies. The species number inferred for each pool by rarefaction analysis was similar to that observed by microscopy. The most representative species were small bacterivorous ciliates, although the distribution of ciliate groups was significantly different in each rock pool. Testate amoebae were also found to be rich in species. This study demonstrates the existence of a diverse ciliate community adapted to persist in these ephemeral and extreme rock pool habitats through species resistance structures, many of which have not been described previously. The presence of competitive species in dormant stages prevents local extinctions through a sequential excystation over time. Our results provide a benchmark for studying protist and microbial biodiversity within rain-fed granite rock pools, a unique habitat that merits bio- and geo- conservation.Item Ciliates — Protists with complex morphologies and ambiguous early fossil record(Marine Micropaleontology, 2015) Dunthorn, Micah; Lipps, Jere H.; Dolan, John R.; Abboud-Abi Saab, Marie; Aescht, Erna; Bachy, Charles; Barría de Cao, María Sonia; Berger, Helmut; Bourland, William A.; Choi, Joong Ki; Clamp, John; Doherty, Mary; Gao, Feng; Gentekaki, Eleni; Gong, Jun; Hu, Xiaozhong; Huang, Jie; Kamiyama, Takashi; Johnson, Matthew D.; Kammerlander, Barbara; Kim, Sun Young; Kim, Young-Ok; la Terza, Antonietta; Laval-Peuto, Michèle; Lipscomb, Diana; Lobban, Christopher S.; Long, Hongan; Luporini, Pierangelo; Lynn, Denis H.; Macek, Miroslav; Mansergh, Robert I.; Martín Cereceda, María Mercedes; McManus, George G.; Montagnes, David J.S.; Ong'ondo, Geoffrey O.; Patterson, David J.; Pérez Uz, Blanca; Quintela Alonso, Pablo; Stoecker, Diane K.; Strüder-Kypke, Michaela C.; Trautmann, Isabelle; Utz, Laura R.P.; Vallesi, Adriana; Vd'ačný, Peter; Warren, Alan; Weisse, Thomas; Wickham, Stephen A.; Yi, Zhenzhen; Zhang, Wuchang; Zhan, Zifeng; Zufall, Rebecca; Agatha, SabineSince ciliates rarely possess structures that easily fossilize, we are limited in our ability to use paleontological studies to reconstruct the early evolution of this large and ecologically important clade of protists. Tintinnids, a group of loricate (house-forming) planktonic ciliates, are the only group that has a significant fossil record. Putative tintinnid fossils from rocks older than Jurassic, however, possess few to no characters that can be found in extant ciliates; these fossils are best described as ‘incertae sedis eukaryotes’. Here, we review the Devonian fossil Nassacysta reticulata and propose that it is likewise another incertae sedis eukaryote due to the lack of any unambiguous ciliate characters. Future tintinnid fossil descriptions would be most helpful if: (i) neutral terminology is used in the descriptions but ciliate-specific terminology in the interpretations; (ii) the current ciliate classification is used, although fossil data may expand or modify classifications based on modern forms; (iii) close collaboration with specialists studying extant ciliates is done; and (iv) editors include an expert of extant ciliates in the review process.Item Complexity of river ciliate communities at a national park highlights the need for microbial conservation(Aquatic Conservation: Marine and Freshwater Ecosystems, 2018) Quintela Alonso, Pablo; Pérez‐Uz, Blanca; Sánchez Jiménez, Abel; Murciano Cespedosa, Antonio; Centeno, Juan D.; García-Rodríguez, Manuel; Montero, Esperanza; Muñoz Araújo, Benito; Olmedo Salinas, Cristina; Refoyo Román, Pablo; Velasco González, Ismael; Martín Cereceda, María Mercedes1.Microorganisms play pivotal roles in aquatic ecosystems. Free‐living protists are the main components of the eukaryotic microbial communities at the base of freshwater ecosystems. Ciliate grazing channels a large proportion of organic matter into multicellular organisms. Surprisingly, ciliates and other microorganisms are neglected in global conservation schemes. 2. Interstitial ciliates were sampled in three sites of varying human pressure on the River Manzanares (La Pedriza National Park, Spain). Abundances of trophic groups and species were adjusted to a generalized linear model (GLM Poisson regression). 3.Ciliate communities were rich in species (74 morphotypes) and although traditional microscopy retrieved a high number of species that appeared only once or in low numbers, rarefaction analyses estimated much larger species richness. These results illustrate that rarefaction assays are a useful first step for exploring the extent of the ciliate cryptic diversity in freshwater ecosystems. 4.Benthic ciliate communities changed significantly, both spatially and at a short temporal scale. The fluctuating nature of the community was manifested by the presence of many ephemeral species at the same river site, revealing a complex and transient community structure. No significant short‐term changes were observed in the physical–chemical properties. Therefore, even slight differences in the abiotic variables may cause rapid shifts of ciliate species. 5.Overall, human pressure had an effect on the interstitial (or benthic) ciliates that resulted in a reduction of species richness and their abundance.Item Beyond the “Code”: A Guide to the Description and Documentation of Biodiversity in Ciliated Protists (Alveolata, Ciliophora)(Journal of Eukaryotic Microbiology, 2017) Warren, Alan; Patterson, David J.; Dunthorn, Micah; Clamp, John C.; Achilles Day, Undine E.M.; Aescht, Erna; Al-Farraj, Saleh A.; Al-Quraishy, Saleh; Al-Rasheid, Khaled; Carr, Martin; G. Day, John; Dellinger, Marc; El-Serehy, Hamed A.; Fan, Yangbo; Gao, Feng; Gao, Shan; Gong, Jun; Gupta, Renu; Hu, Xiaozhong; Kamra, Komal; Langlois, Gaytha; Lin, Xiaofeng; Lipscomb, Diana; Lobban, Christopher S.; Luporini, Pierangelo; Lynn, Denis H.; Ma, Honggang; Macek, Miroslav; Mackenzie-Dodds, Jacqueline; Makhija, Seema; Mansergh, Robert I.; Martín Cereceda, María Mercedes; McMiller, Nettie; Montagnes, David J.S.; Nikolaeva, Svetlana; Ong'ondo, Geoffrey Odhiambo; Pérez Uz, María Blanca; Purushothaman, Jasmine; Quintela Alonso, Pablo; Rotterová, Johana; Santoferrara, Luciana; Shao, Chen; Shen, Zhuo; Shi, Xinlu; Song, Weibo; Stoeck, Thorsten; Terza, Antonietta La; Vallesi, Adriana; Wang, Mei; Weisse, Thomas; Wiackowski, Krzysztof; Wu, Lei; Xu, Kuidong; Yi, Zhenzhen; Zufall, Rebecca; Agatha, SabineRecent advances in molecular technology have revolutionized research on all aspects of the biology of organisms, including ciliates, and created unprecedented opportunities for pursuing a more integrative approach to investigations of biodiversity. However, this goal is complicated by large gaps and inconsistencies that still exist in the foundation of basic information about biodiversity of ciliates. The present paper reviews issues relating to the taxonomy of ciliates and presents specific recommendations for best practice in the observation and documentation of their biodiversity. This effort stems from a workshop that explored ways to implement six Grand Challenges proposed by the International Research Coordination Network for Biodiversity of Ciliates (IRCN-BC). As part of its commitment to strengthening the knowledge base that supports research on biodiversity of ciliates, the IRCN-BC proposes to populate The Ciliate Guide, an online database, with biodiversity-related data and metadata to create a resource that will facilitate accurate taxonomic identifications and promote sharing of data.