Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Barbara A. Costas"'
Publikováno v:
Estuaries and Coasts. 34:373-385
We measured seasonal variations in microzooplankton grazing in Long Island Sound (LIS) and San Francisco Bay (SFB). There was consistent evidence of nutrient limitation in LIS, but not SFB. We found higher chlorophyll a concentrations in LIS compared
Publikováno v:
Journal of Eukaryotic Microbiology. 57:369-378
To assess diversity among cryptic species of the ciliate genus Strombidium, we characterized the small subunit ribosomal DNA gene (SSU-rDNA) from several lineages that had been identified previously as distinct based on the internal transcribed space
Autor:
Barbara A. Costas, Mark E. Ritchie, Mary Doherty, Laura A. Katz, Maiko Tamura, George B. McManus
Publikováno v:
Environmental Microbiology. 12:886-898
The nature and extent of microbial biodiversity remain controversial with persistent debates over patterns of distributions (i.e. cosmopolitanism versus endemism) and the processes that structure these patterns (neutrality versus selection). We used
Publikováno v:
Aquatic Microbial Ecology. 48:141-154
Planktonic ciliates within the subclasses Choreotrichia and Oligotrichia play critical roles in food webs in the world's oceans. To assess the diversity of these ciliates, we designed primers specific to small subunit ribosomal DNA (SSU rDNA) of cili
Publikováno v:
Limnology and Oceanography: Methods. 5:163-173
We developed a method to extract environmental DNA and amplify target portions of the internal transcribed spacer region (ITS) of the ribosomal gene (ITS1-5.8S-ITS2) from individual species of oligotrich and choreotrich ciliate microzooplankton. To d
Autor:
Hans G. Dam, George B. McManus, Rubens M. Lopes, Barbara A. Costas, Salvador Airton Gaeta, Sylvia M. Susini, Carol Holmes Rosetta
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We measured grazing by herbivorous zooplankton ( 80% of phytoplankton production. A comparison of incubations with and without added inorganic nutrients showed no consistent stimulation of phytoplankton growth (slope of enriched versus unenriched tre
Autor:
Autumn Griffin, Barbara A. Costas, Katarzyna A. Pirog, Laura A. Katz, George B. McManus, Oona Snoeyenbos-West
Publikováno v:
The Journal of Eukaryotic Microbiology. 52:7S-27S
We find tremendous genetic diversity underlying the morphological entity Strombidium occulatum. We used multi-locus sequence data to examine molecular diversity within S. occulatum across space and time so as to explore the biogeography and biodivers
Publikováno v:
The Journal of Eukaryotic Microbiology. 52:7S-27S
Biogeography of microbial eukaryotes is widely debated. While some claim that all microbial organisms have a cosmopolitan distribution, other data suggest evidence of endemism. To assess these hypotheses for the distribution of ciliates in the orders
Autor:
Wilhelm Foissner, Oona Snoeyenbos-West, Autumn Griffin, George B. McManus, Barbara A. Costas, Laura A. Katz, Katarzyna A. Pirog
Publikováno v:
Scopus-Elsevier
Current debate on microbial diversity contrasts the 'cosmopolitan' hypothesis, which argues for high gene flow and low diversity, with the 'endemism' hypothesis, which argues for high diversity and geographically restricted gene flow. Our analyses of
Publikováno v:
The Journal of eukaryotic microbiology. 57(4)
To assess diversity among cryptic species of the ciliate genus Strombidium, we characterized the small subunit ribosomal DNA gene (SSU-rDNA) from several lineages that had been identified previously as distinct based on the internal transcribed space