Medio ambiente factores que actúan sobre un sistema
Medio ambiente factores que actúan sobre un sistema
El medio ambiente son los conjuntos de
componentes físicos, químicos, biológicos,
sociales, económicos y culturales
capaces de ocasionar efectos directos
e indirectos, en un plazo corto o largo sobre
los seres vivos. Desde el punto de vista humano,
se refiere al entorno que afecta y condiciona
especialmente las circunstancias de vida de
las personas o de la sociedad en su conjunto.
Comprende el conjunto de valores naturales,
sociales y culturales existentes en un lugar y
en un momento determinado, que influyen
en la vida del ser humano y en las
generaciones futuras. Es decir, no se
trata sólo del espacio en el que se desarrolla
la vida, sino que también comprende seres vivos,
objetos, agua, suelo, aire y las relaciones
entre ellos, así como elementos tan intangibles como la cultura
El 5 de junio se celebra el Día Mundial del Medio Ambiente.
Origen etimológico
La palabra medio procede del latín medium
(género neutro); como adjetivo, del latín
medius (género masculino).
La palabra ambiente procede del latín ambiens,
ambientis, del verbo ambere, «rodear»,
«estar a ambos lados». Se podría
considerar a la expresión medio ambiente
como pleonasmo porque las acepciones
de los dos elementos de tales grafías
son coincidentes con la acepción inherente
cuando van juntos. Sin embargo, algunas
acepciones de ambas palabras
por separado son diferentes.
Lo que permite su comprensión es el contexto.
Por ejemplo, otras acepciones, metafóricas,
del término ambiente aluden a sectores sociales,
como ambiente popular o ambiente aristocrático;
o actitudes, como tener buen ambiente con los amigos.
Medio ambiente
Pese a que la forma habitual
es escribir y pronunciar dos palabras
(medio ambiente), la Real Academia Española, en su
Diccionario Panhispánico de Dudas (DPD),
recomienda el uso y la escritura en un solo
vocablo medioambiente y de la forma
adjetivada medio ambiental.
Concepto de ambiente
En la Teoría general de sistemas,
un ambiente es un complejo de
factores externos que actúan
sobre un sistema y determinan su
curso y su forma de existencia.
Un ambiente podría considerarse
como un superconjunto en el cual
el sistema dado es un subconjunto.
Puede constar de uno o más parámetros,
físicos o de otra naturaleza.
El ambiente de un sistema dado
debe interactuar necesariamente
con los seres vivos.
Estos factores externos son:
Ambiente físico:
Geografía Física, Geología, clima, contaminación.
Ambiente biológico:
Población humana:
Demografía.
Flora: fuente de alimentos
o productores.
Fauna:animales consumidores
primarios, secundarios, etcétera.
Ambiente socioeconómico:
Ocupación laboral o trabajo:
exposición a agentes químicos, físicos.
Urbanización o el desarrollo cultural
de cada familia
Desastres: guerras, inundaciones(precipitaciones).
Desarrollo histórico del concepto ambiental
Hipócrates(460-375 años antes de Cristo),
en su obra Aires, aguas y lugares, resalta
la importancia del ambiente como causa de enfermedad.
Thomas Sydenham (1624-1689) y
Giovanni Maria Lancisi (1654-1720)
formulan la teoría miasmática, en la que el miasma
es un conjunto de emanaciones fétidas de
suelos y aguas impuras que son causa de enfermedad.
En el siglo XIX, con Chadwick William Farr (1807-1883),
con la mortalidad de los mineros, John Snow (1813-1858)
con «Sobre el modo de transmisión del cólera»,
se consolidan la importancia del ambiente en
epidemiología y la necesidad de utilizar métodos numéricos.
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