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Conversely, ex situ methods examine subjects outside their original context. The natural sciences frequently implement in situ methodologies. Geological studies employ field analysis of soil composition and rock formations , while environmental science relies on direct ecosystem monitoring to obtain accurate environmental data.
In-situ conservation is the on-site conservation or the conservation of genetic resources in natural populations of plant or animal species, such as forest genetic resources in natural populations of tree species. [1] This process protects the inhabitants and ensures the sustainability of the environment and ecosystem.
Ex situ management can occur within or outside a species' natural geographic range. Individuals maintained ex situ exist outside an ecological niche . This means that they are not under the same selection pressures as wild populations, and they may undergo artificial selection if maintained ex situ for multiple generations.
Bioremediation techniques can be classified as (i) in situ techniques, which treat polluted sites directly, vs (ii) ex situ techniques which are applied to excavated materials. [8] In both these approaches, additional nutrients, vitamins, minerals, and pH buffers are added to enhance the growth and metabolism of the microorganisms.
Ex situ bioremediation occurs at a location separate from the contaminated site and involves the translocation of the contaminated material. In situ occurs within the site of contamination [1] In situ bioremediation can further be categorized by the metabolism occurring, aerobic and anaerobic, and by the level of human involvement.
Remediation technologies are many and varied but can generally be categorized into ex-situ and in-situ methods. Ex-situ methods involve excavation of affected soils and subsequent treatment at the surface as well as extraction of contaminated groundwater and treatment at the surface. In-situ methods seek to treat the contamination without ...
In ex situ mixing, the hazardous materials are excavated, then machine-mixed with a certain bonding agent. This new, less-hazardous material is then deposited in a designated area, or reused on the initial site. [5] From 1982–2005, ex-situ S/S technologies have accounted for 80% of the 217 projects that were completed. [1]
According to Ponciano et al [5] geoheritage may be in situ (important geosites bearing any exceptional value, such as scientific, cultural, educational, touristic, etc) and ex situ (minerals, fossils, minerals and rocks that were extracted from their origin site and housed in scientific collections and have notable scientific, cultural ...