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Ecosystem effects of intraspecific variation in a colour polymorphic amphibian
Proceedings of the Royal Society B: Biological SciencesAn emerging consensus suggests that evolved intraspecific variation can be ecologically important. However, evidence that evolved trait variation within vertebrates can influence fundamental ecosystem-level processes remains sparse. In this study, we sought to assess the potential for evolved variation in the spotted salamander (
Sean T. Giery +4 more
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Intraspecific trait variation and its effects on food chains
Mathematical Biosciences, 2013Traits such as skill at foraging and investment in anti-predator defense may vary among individuals within a species population. This intraspecific variation has implications for community dynamics. The implications of intraspecific variation of a consumer in the intermediate level of a tritrophic food chain are explored for the case in which two ...
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Growth Inhibition in Crowded Tadpoles: Intraspecific and Interspecific Effects
Ecology, 1967Tadpoles are inhibited in growth when raised in water previously crowded by other larger tadpoles. The ‘alga—like’ cells described in earlier crowding studies were found in the fecal material and intestinal tracts of inhibited tadpoles. Results of 38 crowding experiments using 17 species of tadpoles show that the effects of the inhibitory cell are ...
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Facilitatory effects of pituitary transplants on intraspecific aggression in female hamsters
Hormones and Behavior, 1981Abstract To help clarify the relationship between prolactin (PRL) secretion and aggression in the hamster, the aggressiveness of ovariectomized females given two ectopically grafted pituitary glands was compared to that of ovariectomized control females which underwent a sham transplantation procedure.
J D, Buntin, C, Catanzaro, R D, Lisk
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Intraspecific facilitation: generality, mechanisms and effects
2017In the past two decades, an increasing body of literature has demonstrated the effect of positive plant-plant interactions (known as facilitation) is also an important factor for plant populations and communities. However, facilitation studies have been largely restricted to a community-level.
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Insect sociality and its consequential effects on intraspecific competition
Oecologia, 1975The phenomenon of colonialism which characterizes many insect groups is considered in terms of its potential effect on intraspecific competition. Intraspecific competition is assumed to be a function of the number of distinct pair encounters between 2 individuals of differing colony origin. A model is offered which describes the reduction in the number
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Intraspecific competition increases toxicant effects in outdoor pond microcosms
Ecotoxicology, 2012Competition is a ubiquitous factor in natural populations and has been reported to alter the ecological impact of xenobiotics. We investigated conditions that mirror the natural variation of environmental factors. For this, different treatments were applied to 96 outdoor pond microcosms by shading the ponds and harvesting the communities.
Saskia, Knillmann +3 more
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Effects of anteroventral septal lesions on intraspecific aggression in male hamsters
Physiology & Behavior, 1981Abstract Anteroventral septal (AVS) but not posterior septal-anterior thalamic (PSAT) lesions significantly increased attacks by male hamsters on restrained, drug-treated target hamsters. These differences in aggressiveness were confirmed by unrestrained paired encounters: AVS subjects defeated PSAT subjects in every encounter and sham operated ...
M, Potegal, A, Blau, M, Glusman
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Top-down effects of intraspecific predator behavioral variation
2023Among-individual variation in predator traits is ubiquitous in nature. However, the role of intraspecific trait variation in trophic dynamics has been seldom considered in community ecology. This has left unexplored a) to what degree does among-individual variation in predator traits regulate prey populations and b) to what degree do these effects vary
James Lichtenstein +5 more
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The effects of intraspecific and interspecific diversity on food web stability
Theoretical Ecology, 2020Although the effects of species diversity on food web stability have long been recognized, relatively little is known about the influence of intraspecific diversity. Empirical work has found that intraspecific diversity can increase community resilience and resistance, but few theoretical studies have attempted to use modeling approaches to determine ...
Akana E. Noto, Tarik C. Gouhier
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