Animal Ecology and Adaptation
Animals are matched to their environments by adaptations of form, physiology, and behaviour, and their distributions, life histories, and interactions are shaped by the ecological pressures they face.
Definition
Animal ecology and adaptation is the study of the relationships between animals and their biotic and abiotic environments, including the adaptations that fit animals to their surroundings and the ecological processes governing their distribution, abundance, and interactions.
Scope
This area treats animals in relation to their environment: how they are adapted to physical conditions and resources, how their niches and geographic distributions are determined, and how life-history strategies allocate effort to growth, survival, and reproduction. It covers interactions among species, including predation, competition, and the spectrum of symbioses, and the biogeographic patterns that describe where animal groups occur across the globe.
Sub-topics
Core questions
- How are animals adapted to the physical conditions and resources of their environments?
- What determines an animal's ecological niche and its geographic distribution?
- How do life-history strategies balance reproduction, growth, and survival?
- How do interactions such as predation, competition, and symbiosis shape animal populations?
Key theories
- Adaptation to the environment
- Natural selection matches animals to their environments through physiological, morphological, and behavioural adaptations, such as mechanisms of temperature and water regulation that allow survival under particular conditions.
- Life-history strategies and trade-offs
- Because resources are limited, animals face trade-offs in allocating energy to growth, maintenance, and reproduction, producing characteristic life-history strategies ranging from many small offspring with little care to few well-provisioned young.
Clinical relevance
Animal ecology underpins wildlife conservation, the management of fisheries and game, and the prediction of how species respond to habitat change and climate, as well as the control of pests and the ecology of disease vectors. This is educational context, not clinical advice.
History
Wallace mapped the world's animal regions and founded zoogeography in the nineteenth century. Charles Elton established animal ecology as a discipline in the 1920s with concepts of the niche and food chains, Hutchinson formalised the niche as a multidimensional space, and MacArthur and others developed quantitative theories of life histories, competition, and island biogeography in the mid-twentieth century.
Key figures
- Charles Darwin
- Alfred Russel Wallace
- Charles Elton
- G. Evelyn Hutchinson
- Robert MacArthur
Related topics
Seminal works
- hickman2020
- begon2006
- schmidtnielsen1997
Frequently asked questions
- What is an ecological niche?
- A niche is the full set of conditions and resources an animal needs and the role it plays in its community, often described as a multidimensional space of environmental factors within which a species can persist.
- What is an adaptation?
- An adaptation is a heritable trait of form, physiology, or behaviour that has been shaped by natural selection because it improves an animal's survival or reproduction in its environment.