Results 41 to 50 of about 2,390 (165)

Big answers from small worlds: a user's guide for protist microcosms as a model system in ecology and evolution

Methods in Ecology and Evolution, Volume 6, Issue 2, Page 218-231, February 2015., 2015
Summary Laboratory microcosm experiments using protists as model organisms have a long tradition and are widely used to investigate general concepts in population biology, community ecology and evolutionary biology. Many variables of interest are measured in order to study processes and patterns at different spatiotemporal scales and across all levels ...
Florian Altermatt, Emanuel A. Fronhofer, Aurélie Garnier, Andrea Giometto, Frederik Hammes, Jan Klecka, Delphine Legrand, Elvira Mächler, Thomas M. Massie, Frank Pennekamp, Marco Plebani, Mikael Pontarp, Nicolas Schtickzelle, Virginie Thuillier, Owen L. Petchey, Matthew Spencer   +15 more
wiley   +1 more source

Macronuclear DNA in Stentor coeruleus: a first approach to its characterization [PDF]

, 2017
The macronuclei of Stentor coeruleus were isolated on a discontinuous sucrose gradient and their DNA was purified by conventional methods. The GC content was 32 mole%. The DNA banded as a single peak on analytical ultracentrifugation at 1·691 g/cm3.
De Haller, G., Pelvat, B.
core  

The Mechanisms of Codon Reassignments in Mitochondrial Genetic Codes [PDF]

, 2007
Many cases of non-standard genetic codes are known in mitochondrial genomes. We carry out analysis of phylogeny and codon usage of organisms for which the complete mitochondrial genome is available, and we determine the most likely mechanism for codon ...
A Reyes, A Schneider, AM Nedelcu, AM Simpson, AP Sibler, BF Lang, C Gissi, CA Lozupone, CE Bullerwell, D Urbina, DH Ardell, DV Lavrov, DW Schultz, DW Schultz, E Seif, E Talla, EM Denovan-Wright, FHC Crick, G Burger, G Burger, G Burger, H Asahara, HS Kim, J Castrasena, J Matsugi, J Swire, JD Alfonzo, JL Blanchard, JL Boore, K Hancock, K Tomita, Knight, Knight, M Ehara, M Ehara, M Kimura, M Nohara, M Turmel, MAS Santos, MAS Santos, ME Saks, MJ Laforest, MJ Telford, MV Sanchez Puerta, N Spruyt, NJ Savill, Paul G. Higgs, PG Higgs, PG Higgs, PJ Keeling, PS Lovett, R Giegé, R Koszul, RC Morris, S Kerscher, S Matsuyama, S Osawa, S Osawa, S Osawa, S Sengupta, S Yokobori, SE Massey, SG Andersson, SG Andersson, SJ Freeland, Supratim Sengupta, T Muramatsu, Tomita, Tomita, U Kück, Xiaoguang Yang, Y Hayashi-Ishimaru, Y Hayashi-Ishimaru, Y Inagaki, Y Kuchino   +74 more
core   +4 more sources

"Paramecium aurelia and mutation"

Experimental Biology and Medicine, 1904
The ordinary species is Paramecium caudatum; superficially, it resembles P. aurelia. The latter differs from the former in smaller size, in rounded instead of attenuated posterior end, and in the possession of two instead of one micronucleus. The last is generally regarded as the most important difference between the two species. In March, 1905, a pair
openaire   +2 more sources

Thermal response of freshwater ciliates: Can they survive at elevated lake temperatures?

Freshwater Biology, Volume 69, Issue 9, Page 1245-1260, September 2024.
Abstract Ciliates are a well‐defined, species‐rich, versatile group of heterotrophic and mixotrophic protists. Their response to increased temperature during global warming is critical for the structure and functioning of freshwater food webs. I conducted a meta‐analysis of the literature from field studies and experimental evidence to assess the ...
Thomas Weisse
wiley   +1 more source

Competition between mixo‐ and heterotrophic ciliates under dynamic resource supply

Ecosphere, Volume 15, Issue 7, July 2024.
Abstract The outcome of species competition strongly depends on the traits of the competitors and associated trade‐offs, as well as on environmental variability. Here, we investigate the relevance of consumer trait variation for species coexistence in a ciliate consumer–microalgal prey system under fluctuating regimes of resource supply.
Sabine Flöder, Toni Klauschies, Moritz Klaassen, Tjardo Stoffers, Max Lambrecht, Stefanie Moorthi   +5 more
wiley   +1 more source

Coexistence via Resource Partitioning Fails to Generate an Increase in Community Function [PDF]

, 2012
Classic ecological theory suggests that resource partitioning facilitates the coexistence of species by reducing inter-specific competition. A byproduct of this process is an increase in overall community function, because a greater spectrum of resources
A Sih, BJ Cardinale, C Matz, D Balciunas, D Tilman, D Tilman, David A. Vasseur, DL Finke, DU Hooper, FI Isbell, G Bell, GF Gause, J Duffy, J Vandermeer, JE Cohen, JH Vandermeer, John P. DeLong, JP DeLong, JP DeLong, JW Fox, L Jiang, L Jiang, LD Power, M Loreau, M Loreau, MA Leibold, MJP Van Oijen, MW Cadotte, N Loeuille, N Mouquet, Nicolas Mouquet, NJ Gotelli, RA Armstrong, RR Vance, SP Hubbell, T Fenchel, T Fenchel, TJ Case, U Brose, WB Cosgrove, WD Taylor   +40 more
core   +4 more sources

Using digital PCR to predict ciliate abundance from ribosomal RNA gene copy numbers

Environmental Microbiology, Volume 26, Issue 4, April 2024.
We have developed a digital polymerase chain reaction assay for quantifying the small subunit of the ribosomal RNA gene copies in ciliates. This protocol has proven effective in quantifying the cellular abundance of ciliates in environmental samples. Notably, our method can reliably detect as few as a single cell in a sample.
Megan Gross, Micah Dunthorn, Quentin Mauvisseau, Thorsten Stoeck   +3 more
wiley   +1 more source

Methylation of Replicating and Nonreplicating DNA in the Ciliate \u3cem\u3eTetrahymena thermophila\u3c/em\u3e [PDF]

, 1989
Methylation of adenine in replicating and nonreplicating DNA of the ciliate Tetrahymena thermophila was examined. In growing cells, 87% of the methylation occurred on the newly replicated daughter strand, but methylation was also detectable on the ...
Harrison, Gail Singer, Karrer, Kathleen M.   +1 more
core   +1 more source

Small‐RNA‐guided histone modifications and somatic genome elimination in ciliates

WIREs RNA, Volume 15, Issue 2, March/April 2024.
In ciliates, an ancestral pathway for transposable element repression by small RNAs and histone methyltransferases has evolved into a highly orchestrated process to eliminate unwanted sequences from the genome. Abstract Transposable elements and other repeats are repressed by small‐RNA‐guided histone modifications in fungi, plants and animals.
Thomas Balan, Leticia Koch Lerner, Daniel Holoch, Sandra Duharcourt   +3 more
wiley   +1 more source