Results 71 to 80 of about 31,371 (261)

Ecological pleiotropy and indirect effects alter the potential for evolutionary rescue

Evolutionary Applications, Volume 12, Issue 3, Page 636-654, March 2019., 2019
Abstract Invading predators can negatively affect naïve prey populations due to a lack of evolved defenses. Many species therefore may be at risk of extinction due to overexploitation by exotic predators. Yet the strong selective effect of predation might drive evolution of imperiled prey toward more resistant forms, potentially allowing the prey to ...
John P. DeLong, Jonathan Belmaker
wiley   +1 more source

Senescence in vitro and ionising radiations—the human diploid fibroblast model [PDF]

, 1981
The influence of ionising radiations on ageing is still controversial. Since Hayflick established the concept that diploid cells have finite lifespan in vitro, human diploid fibroblast (HDF) cultures have been recognised as a potent experimental model ...
A.F.G. Stevenson, Ban, Beer, Carrel, Cox, Cremer, Cristofalo, Ebeling, Finch, Fukushima, Guichard, Hayflick, Hayflick, Hayflick, Hoehn, Holliday, Holliday, Hopwood, Hug, Kaji, Kirkwood, Kirkwood, Laublin, Lima, Macieira-Coelho, Macieira-Coelho, Macieira-Coelho, Macieira-Coelho, Macieira-Coelho, Maisin, Martin, Namba, Nicholas, Orgel, Orgel, Russ, Schneider, Schneider, Smith, Stevenson, T. Cremer, Walburg, Weismann, Williams, Wilson   +44 more
core   +1 more source

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

Effects of ultraviolet irradiation on the carbohydrate metabolism of Paramecium aurelia [PDF]

, 1975
The changes induced in carbohydrate metab. of P. aurelia by exposure to uv irradn. were investigated. Uv radiation for 5 min caused an increase in carbohydrate levels followed by a fall after longer periods of irradn.
Kasturi Bai, A.R., Manjula, M.K.
core  

"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

Phylogenomic analysis of integral diiron membrane histidine motif-containing enzymes in ciliates provides insights into their function and evolutionary relationships [PDF]

, 2017
The Integral Membrane Histidine Motif-containing Enzymes (IMHME) are a class of binuclear non-heme iron proteins widely distributed among prokaryotes and eukaryotes.
Cid, Nicolás Gonzalo, Elguero, María Eugenia, Montes, María Guadalupe, Nudel, Berta Clara, Nusblat, Alejandro David, Sánchez Granel, María Luz   +5 more
core   +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

Gause's exclusion principle revisited: artificial modified species and competition

, 2000
Gause's principle of competition between two species is studied when one of them is sterile. We study the condition for total extinction in the niche, namely, when the sterile population exterminates the native one by an optimal use of resources.
Aluja M, Emmel T C, Gause G F, J C Flores, McInnis D O, Murray J D, R Beltran, Robinson A S, Vargas R I, Villee C A, Wio H S   +10 more
core   +2 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