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Concepts

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219 concepts

phenomenon

phenological mismatch

When organisms dependent on synchronized milestones adapt to environmental changes at different rates, causing their reproductive, feeding, and/or migration patterns to become asynchronous

climate202 papers
framework

elevational gradients

Spatial gradients in elevation that capture variation in temperature, soil age and type, disturbance regimes, and land-use histories providing important insights into how organisms, communities, and e...

general ecology138 papers
process

phenotypic plasticity

When a genotype produces different phenotypes under differing environmental conditions

evolution114 papers
metric

species diversity

A measure of community diversity that accounts for both species richness and relative abundance, calculated using the Shannon-Weiner index

community ecology93 papers
theory

climate change effects on species interactions

The framework that climate affects species abundances and distributions both directly through physiological effects and indirectly through effects on multi-trophic species interactions

climate91 papers
process

interspecific competition

Negative interactions between individuals of different species competing for limited resources

community ecology74 papers
measurement

space use

Way in which individuals distribute themselves across landscape, including movement patterns and spatial organization like home range size and overlap

landscape71 papers
measurement

snow cover duration

Number of days from autumn snow onset to spring snowmelt, providing temperature stabilization and protection for overwintering organisms

climate68 papers
metric

reproductive success

Plant fitness measured through various components including fruit set, seed production, and seeds per plant

population ecology58 papers
process

thermal performance

Temperature-dependent physiological and behavioral responses that affect organism fitness and population dynamics

general ecology53 papers
process

mutualistic relationships

Mutually beneficial herbivore-predator associations where sap-feeding insects provide honeydew food for ants in exchange for protection against predators

community ecology52 papers
theory

early-life trade-offs

The concept that organisms face competing demands for limited resources during development that create trade-offs between different fitness components

population ecology45 papers
phenomenon

pollen limitation

Reduced seed set resulting from insufficient pollen receipt, particularly affecting females when hermaphrodite density and frequency increases

population ecology45 papers
process

drought stress

Physiological stress experienced by plants due to reduced water availability that can harm fitness by inducing leaf loss, reducing flower size, and decreasing seed production

climate44 papers
phenomenon

climate-induced range shifts

Changes in species geographic distributions in response to changing climate conditions, typically involving movement to higher elevations or latitudes

climate41 papers
theory

frequency-dependent selection

Selection where individual fitness depends on the local frequency rather than global frequency, creating population structure with groups varying in genetic and phenotypic composition

population ecology41 papers
process

herbivory

Consumption of plant material by animals, measured as browse occurrence on host plants

community ecology41 papers
process

trophic cascade

Indirect effects of predators on lower trophic levels mediated through changes in intermediate consumer behavior or abundance

community ecology40 papers
process

nonconsumptive effects

Behavioral, physiological, and life-history changes that reduce the risk of predation but have associated energetic or fitness costs to prey individuals and populations

community ecology38 papers
theory

nutritional niche partitioning

The concept that co-occurring species occupy distinct positions in multidimensional nutrient space to minimize competition and facilitate coexistence

community ecology38 papers
process

pollinator-mediated selection

Natural selection on floral traits that occurs through differential pollinator visitation and resulting differences in reproductive success

evolution38 papers
theory

local adaptation

An evolutionary process in which a population evolves to become more suited to its local environment through natural selection, resulting in higher fitness in the home environment compared to individu...

evolution37 papers
metric

heritability

The proportion of phenotypic variation in a trait that is due to genetic variation, estimated using parent-offspring regression methods

evolution35 papers
measurement

photosynthetic rate

The rate at which plants convert carbon dioxide and water into glucose using light energy, measured as gas exchange

physiological35 papers
phenomenon

pond hydroperiod

The frequency and duration of annual pond inundation vs. exposure, with categories including temporary ponds (dry annually in early summer), semi-permanent ponds (dry in late summer in most but not al...

hydrology35 papers
process

climate change adaptation

The ability of organisms to adjust to changing climatic conditions through genetic, phenotypic, or behavioral changes

climate32 papers
process

facilitative interactions

Positive species interactions such as nurse plant effects by cushion-forming species that increase reproductive success for neighboring plants

community ecology32 papers
framework

reciprocal transplant experiment

Experimental approach where organisms from different source populations are grown in different environments to test for local adaptation

methodological31 papers
process

facultative paedomorphosis

Alternative life history strategy where some individuals retain larval traits and become sexually mature in aquatic environment while others metamorphose to terrestrial adults

evolution30 papers
process

ecological speciation

The formation of new species involves divergence of phenotypes and development of reproductive isolation, where initial divergence results from divergent natural selection and reproductive isolation a...

evolution27 papers
process

maternal care

Parental behaviors including female-pup interactions, vigilance, and antipredator behaviors that influence offspring survival and development

population ecology24 papers
framework

temporal dynamics

Changes in ecological patterns and processes across different time scales

population ecology23 papers
process

breeding ecology

The study of reproductive behaviors, nesting habitat selection, and breeding success in bird populations

population ecology21 papers
framework

climate change impacts

The effects of long-term warming on hydrological processes, including changes in snowpack dynamics, growing season length, and water demand by vegetation

climate21 papers
process

oviposition host plant choice

The selection of specific plants by female insects for egg-laying that affects larval survival and development

population ecology21 papers
process

phenotypic selection

The process by which traits influence fitness, measured through directional and quadratic selection differentials relating trait values to reproductive success

evolution21 papers
theory

evolutionary rescue

A process by which adaptive evolutionary change occurs sufficiently rapidly to counteract a decline in population size under initially unfavorable conditions

evolution20 papers
theory

keystone species

A species that has a disproportionately large effect on its environment relative to its abundance and whose presence/absence significantly affects ecosystem structure and function

community ecology20 papers
measurement

glucosinolates

Secondary metabolites that mediate interactions with herbivores and pathogens in Brassicaceae

community ecology19 papers
process

ecosystem engineering

The modification of environments by organisms in ways that influence resource availability for other species, exemplified by beaver dam construction creating pond habitats.

community ecology18 papers
measurement

floral volatile organic compounds

Chemical compounds emitted by flowers that contribute to floral scent and can influence pollinator attraction and plant-herbivore interactions

general ecology18 papers
process

gene flow

Movement of genes between populations through migration and reproduction

population ecology18 papers
process

frost damage

Direct damage to plant buds and flowers from freezing temperatures occurring during vulnerable developmental stages

climate17 papers
phenomenon

nesting preferences

The selective choices made by organisms regarding where to construct nests, influenced by environmental factors that affect offspring survival and reproductive success.

population ecology17 papers
measurement

community composition

The identity and relative abundance of species within an ecological community

community ecology16 papers
process

hybridization

Interbreeding between taxa that alters the pool of genetic variation available for population responses to changing environments

evolution16 papers
measurement

phylogenetic signal

The tendency for related species to resemble each other more than expected by chance, measured by Blomberg's K and Pagel's lambda

evolution16 papers
process

balancing selection

Selection that maintains multiple alleles in a population at frequencies above those expected from mutation alone

population ecology15 papers
process

cannibalism

Predation behavior where individuals consume members of their own species, particularly common in A. m. nebulosum populations targeting first year hatchlings

population ecology15 papers
process

self-pollination

Reproduction in which pollen from a flower fertilizes ovules in the same flower or on the same plant

evolution15 papers