Results 31 to 40 of about 17,778 (299)

The Operation of Selection in Situations of Interspecific Competition [PDF]

open access: yesEvolution, 1971
Fundamental to much of community theory is the principle of competitive exclusion which asserts that species overlapping completely in their limiting resource(s) and the manner by which they utilize them cannot co-exist. In the formal theory of interspecific competition upon which this principle is based, little consideration is given to the genetic ...
openaire   +3 more sources

Food-plant choice of seven dominant grasshopper species in the Xinjiang grasslands [PDF]

open access: yesJournal of Orthoptera Research
Feeding habits and competitive interactions among dominant grasshopper species in the Xinjiang grasslands (China) were studied under natural conditions through microscopic analyses of insect crop contents.
Jin-Long Ren   +5 more
doaj   +3 more sources

Competition and hybridization drive interspecific territoriality in birds [PDF]

open access: yesProceedings of the National Academy of Sciences, 2020
Costly interactions between species that arise as a by-product of ancestral similarities in communication signals are expected to persist only under specific evolutionary circumstances. Territorial aggression between species, for instance, is widely assumed to persist only when extrinsic barriers prevent niche divergence or selection in sympatry is too
Jonathan P. Drury   +2 more
openaire   +6 more sources

Natural selection on traits and trait plasticity in Arabidopsis thaliana varies across competitive environments

open access: yesScientific Reports, 2020
Interspecific competition reduces resource availability and can affect evolution. We quantified multivariate selection in the presence and absence of strong interspecific competition using a greenhouse experiment with 35 natural accessions of Arabidopsis
Kattia Palacio-Lopez   +3 more
doaj   +1 more source

Microphysiological Systems in Cancer Research: Advancing Immunotherapy through Tumor Microenvironment‐Integrated Organ‐On‐Chip Models

open access: yesAdvanced Therapeutics, EarlyView.
Emerging microphysiological systems reproduce the spatial, biochemical, and cellular complexity of the tumor microenvironment, surpassing 2D cultures and murine models. By integrating patient‐derived tumors, perfusable vasculature, and immune trafficking, these organ‐on‐chip platforms reveal mechanisms of immune evasion, predict therapeutic responses ...
Fabiana Moresi   +5 more
wiley   +1 more source

Interspecific competition influences fitness benefits of assortative mating for territorial aggression in eastern bluebirds (Sialia sialis).

open access: yesPLoS ONE, 2014
Territorial aggression influences fitness and, in monogamous pairs, the behavior of both individuals could impact reproductive success. Moreover, territorial aggression is particularly important in the context of interspecific competition.
Morgan R Harris, Lynn Siefferman
doaj   +1 more source

Interspecific competition among terrestrial slugs

open access: yesJournal of Molluscan Studies, 2022
ABSTRACT Interspecific competition among terrestrial gastropods has previously been considered to have little effect on population dynamics and local distribution. Recent studies, however, demonstrate several cases in which interspecific competition plays a major role in structuring terrestrial gastropod communities.
Johan Watz, Daniel Nyqvist
openaire   +2 more sources

Comprehensive Characterization of Bihormonal Cells and Endocrine Cell Lineages in Mammalian Pancreatic Islets

open access: yesAdvanced Science, EarlyView.
This study integrates dual‐reporter genetics, imaging flow cytometry, and single‐cell sequencing to characterize rare bihormonal cells in mouse and human pancreatic islets. Gcg⁺Ins⁺ cells resemble α‐cells rather than transitional states. Cross‐species gene network analysis refines islet cell taxonomy and reveals human‐specific δ‐cell subtypes ...
Xin‐Xin Yu   +10 more
wiley   +1 more source

Hosts and Commensal Bacteria Synergistically Antagonize Opportunistic Pathogens at the Single‐Cell Resolution

open access: yesAdvanced Science, EarlyView.
In the tripartite‐species model, Drosophila larvae stimulate lactate production through excreting digestion enzymes. S. marcescens population senses a cue of lactate and tends to diverge into virulent and reduced virulence subclusters with remarkable heterogeneity to metabolize carbon metabolism and counter colonization resistance, giving a fitness ...
Sheng Zhang   +10 more
wiley   +1 more source

Influence of Temperature on the Interaction for Resource Utilization between Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), and a Community of Lepidopteran Maize Stemborers Larvae

open access: yesInsects, 2020
Intra- and interspecific interactions within communities of species that utilize the same resources are characterized by competition or facilitation.
Bonoukpoè Mawuko Sokame   +6 more
doaj   +1 more source

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