Results 11 to 20 of about 1,515 (185)

Temperature and predators as interactive drivers of community properties. [PDF]

Ecol Evol, 2023
The effects of warming on ecological communities emerge from a range of potentially asymmetric impacts on individual physiology and development. We used microcosms with a range of protists, rotifers, and a gastrotrich, with and without the predator Actinosphaerium, to assess changes in diversity, body size, function, and composition in response to ...
DeLong JP, Coblentz KE, Uiterwaal SF, Akwani C, Salsbery ME.   +4 more
europepmc   +2 more sources

Eco-phenotypic feedback loops differ in multistressor environments. [PDF]

Ecology
Abstract Natural communities are exposed to multiple environmental stressors, which simultaneously impact the population and trait dynamics of the species embedded within these communities. Given that certain traits, such as body size, are known to rapidly respond to environmental change, and given that they can strongly influence the density of ...
Govaert L, Klauschies T.
europepmc   +2 more sources

Model Selection for Ordinary Differential Equations: A Statistical Testing Approach. [PDF]

Biom J
ABSTRACT Ordinary differential equations (ODEs) are foundational tools in modeling intricate dynamics across a gamut of scientific disciplines. Yet, a possibility to represent a single phenomenon through multiple ODE models, driven by different understandings of nuances in internal mechanisms or abstraction levels, presents a model selection challenge.
Dattner I, Gugushvili S, Laskorunskyi O.
europepmc   +2 more sources

The planktonic freshwater ciliate Balanion planctonicum (Ciliophora, Prostomatea): A cryptic species complex or a "complex species"? [PDF]

J Eukaryot Microbiol
Abstract The globally distributed ciliate Balanion planctonicum is a primary consumer of phytoplankton spring blooms. Due to its small size (~20 μm), identification and quantification by molecular tools is preferable as an alternative to the laborious counting of specimen in quantitative protargol stains. However, previous sequencing of the 18S rDNA V9
Schalch-Schuler M, Bassin B, Andrei AS, Dirren-Pitsch G, Waller K, Hofer C, Pernthaler J, Posch T.   +7 more
europepmc   +2 more sources

Ecosystem Size Mediates the Effects of Resource Flows on Species Diversity and Ecosystem Function at Different Scales. [PDF]

Ecol Evol
Ecosystem size and resource flows are key factors driving biodiversity and ecosystem function. However, the question of whether and how these drivers interact has been largely overlooked. Here, we show how ecosystem size asymmetry affects biodiversity and function of two‐patch meta‐ecosystems connected through flows of nonliving resources using a ...
Giacomuzzo E, Peller T, Gounand I, Altermatt F.   +3 more
europepmc   +2 more sources

THE INDUCTION OF MUTATIONS IN PARAMECIUM AURELIA BY BETA RADIATION [PDF]

Genetics, 1949
R. F. Kimball
openalex   +4 more sources

Steroid Requirements of Paramecium aurelia [PDF]

Journal of General Microbiology, 1955
SUMMARY: Paramecium aurelia, var. 4, stock 51.7 (s) requires a steroid as a growth factor; β- and γ-sitosterol, fucosterol, brassicasterol, stigmastcrol and δ4,22-stigmastadienone are active in supporting its growth. Esterification of the 3-hydroxyl group decreases the activity.
W. J. Van Wagtendonk, Robert L. Conner
openaire   +3 more sources

Paramecium Diversity and a New Member of the Paramecium aurelia Species Complex Described from Mexico

Diversity, 2020
Paramecium (Ciliophora) is an ideal model organism to study the biogeography of protists. However, many regions of the world, such as Central America, are still neglected in understanding Paramecium diversity.
Alexey Potekhin, Rosaura Mayén-Estrada
doaj   +1 more source

Reconsidering the evidence for learning in single cells

eLife, 2021
The question of whether single cells can learn led to much debate in the early 20th century. The view prevailed that they were capable of non-associative learning but not of associative learning, such as Pavlovian conditioning. Experiments indicating the
Samuel J Gershman, Petra EM Balbi, C Randy Gallistel, Jeremy Gunawardena   +3 more
doaj   +1 more source

The Surface Antigens of Paramecium aurelia [PDF]

Journal of General Microbiology, 1956
SUMMARY: A surface antigen preparation obtained from Paramecium aurelia absorbs from a concentrated antiserum approximately 74% of the total antibody absorbed by the intact animal. An antiserum prepared against this preparation immobilized P. aurelia of the same serotype.
Litman R, Van Wagtendonk Wj, Van Tijn B, Young Ml, Reisner A   +4 more
openaire   +3 more sources