Dominant Species
Dominant Species - Related Videos
01:29
Dominant and Dominated Strategies
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2025
In strategic decision-making, a dominant strategy is one that always provides the best outcome for a player, no matter what the other players decide. This ensures that the player's payoff is maximized regardless of the choices made by others. On the other hand, a dominated strategy consistently leads to a worse outcome than another available strategy, regardless of the opponent's decision. For instance, imagine two firms competing in a market by setting production levels—either high or low.
01:43
Incomplete Dominance
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2021
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism. According to Mendel, organisms with both copies or a single copy of the dominant allele display a...
03:34
Assessing Social Dominance in Mouse Models Using the Tube Test
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Cited by 1 •
2025
This protocol describes a behavioral assay to evaluate social dominance in rodents using the tube test. Social dominance remains stable over time, and several models of developmental and neurological disorders exhibit robust social dominance abnormalities. Therefore, the tube test serves as a convenient outcome measure for mechanistic studies or preclinical therapeutic screening.
01:30
Equilibrium in Dominant Strategies
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2025
In game theory, equilibrium in dominant strategies arises when each player selects their optimal strategy independently of others' choices. This simplifies analysis since each player's best decision is predictable without considering opponents' actions. Understanding Dominant Strategy Equilibrium A dominant strategy consistently offers the best outcome for a player, regardless of the choices of other players. When all players adopt their dominant strategies, the game reaches a stable...
10:14
Species Distribution and Biogeography - Student Protocol
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2019
Simulating Colonization and Extinction on Islands ExpandForm groups of three. One member of the group will simulate colonization by throwing balls into the groups of cups representing the islands. Another will simulate extinction by rolling dice to randomly remove balls from the cups. The third group member will record the data. Take time to familiarize yourself with the four island stations. NOTE: There are two large islands with 12 cups and two small islands with 6 cups. Two of the stations...
FAQs
Their effects often operate through competition for light, nutrients, water, space, or food. When a species captures or controls these resources more successfully, neighboring populations may become limited, changing local species composition and habitat conditions. These resource effects can also influence energy flow through the community, linking the dominant species’ competitive success to broader ecosystem functioning.
High abundance, large biomass, extensive coverage, or strong competitive performance can each support dominance. The relevant trait may vary with the environment: coverage may matter when organisms compete for space or light, whereas abundance or biomass may better indicate influence in other communities. Ecologists therefore evaluate dominance using several measurements rather than relying on one universal characteristic.
Dominance and keystone status describe different relationships between ecological influence and abundance. A dominant species usually has strong effects associated with being abundant, large, or competitively successful. A keystone species can exert a major ecological effect even when it is not abundant. Distinguishing these categories prevents researchers from treating numerical prevalence and disproportionate impact as equivalent.
Researchers assess measurable properties such as abundance, biomass, coverage, and effects on neighboring organisms. They compare these measures across environmental gradients to determine whether a species consistently shapes community structure or whether its influence changes with conditions. Combining direct measurements with observed effects provides stronger evidence of ecological dominance than counting individuals alone.
Environmental gradients reveal how dominance changes across differing conditions. A species may exert stronger or weaker effects as resource availability, habitat conditions, or competitive relationships shift. Examining these patterns helps ecologists connect measured abundance, biomass, coverage, and neighbor effects to community organization, rather than assuming that one species has identical influence throughout its entire range.
Recognizing which organisms strongly shape resources, habitat conditions, species composition, or energy flow helps explain how communities are organized. This information can guide habitat management and improve predictions about responses to disturbance and climate change. Measurements of dominance also provide a way to track whether community structure and influential species change under altered environmental conditions.