Search results
Results from the WOW.Com Content Network
A stressor is a chemical or biological agent, environmental condition, external stimulus or an event seen as causing stress to an organism. [1] Psychologically speaking, a stressor can be events or environments that individuals might consider demanding, challenging, and/or threatening individual safety.
Stress, whether physiological, biological or psychological, is an organism's response to a stressor, such as an environmental condition or change in life circumstances. [ 1 ] [ 2 ] When stressed by stimuli that alter an organism's environment, multiple systems respond across the body. [ 1 ]
Ecotoxicology differs from environmental toxicology in that it integrates the effects of stressors across all levels of biological organisation from the molecular to whole communities and ecosystems, whereas environmental toxicology includes toxicity to humans and often focuses upon effects at the organism level and below. [1]
The four-step risk assessment process. Environmental hazard identification is the first step in environmental risk assessment, which is the process of assessing the likelihood, or risk, of adverse effects resulting from a given environmental stressor. [6]
This is a glossary of environmental science. Environmental science is the study of interactions among physical, chemical, and biological components of the environment. Environmental science provides an integrated, quantitative, and interdisciplinary approach to the study of environmental systems.
A key environmental concern involves polycyclic aromatic hydrocarbons (PAHs), which "accumulate on particles and sediments, shielding them from biodegradation," according to Green and Trett. [ 7 ] In one study, samples were collected from four sites (13 stations) in the Amazon where crude oil was the main pollutant.
Abiotic stress is the negative impact of non-living factors on the living organisms in a specific environment. [1] The non-living variable must influence the environment beyond its normal range of variation to adversely affect the population performance or individual physiology of the organism in a significant way.
Eco-anxiety (short for ecological anxiety and also known as eco-distress or climate anxiety) is a challenging emotional response to climate change and other environmental issues. [1] Extensive studies have been done on ecological anxiety since 2007, and various definitions remain in use. [2]