INALI   02622
INSTITUTO NACIONAL DE LIMNOLOGIA
Unidad Ejecutora - UE
capítulos de libros
Título:
CONTAMINATION? NATURAL AND ANTHROPIC STRESSORS ON FRESHWATER DECAPOD CRUSTACEANS
Autor/es:
COLLINS PABLO AGUSTIN; WILLINER VERONICA; MONTAGNA MARCELA
Libro:
Pollution Control: Management, Technology and Regulations
Editorial:
NOVA
Referencias:
Lugar: Hauppauge; Año: 2010;
Resumen:
Organisms and populations in a freshwater ecosystem respond, when the environment is affected to extreme situations, of different mode. These stressors could be the product of human activities (e.g. farmland, industry, cities) or alterations of natural cycle (e.g. abnormal drought and flooding; or extreme maximum and minimum temperature). According to the intensity (temporal, spatial and amount of agent), the response vary since behavioral aspect to survival diminution. Biological communities are in equilibrium with all their components. However, this stability could crack, when their members change their relative relationship, or when new elements are incorporated; or the main cycles are modified. These elements can affect the internal biochemical composition; frequency and alteration in cell of some organs leading to death, disease, reproduction failures or diminished growth. Among freshwater crustaceans, crabs and prawns have been known as sensitive to environmental stress; and their biological characteristics allow us to use in them ecological and toxicological studies. Moreover, the climatic changes together to quantitatively and variety increase of products that man had produced, used and flushes in the environment, provokes constant risk to the fauna and thus creates the necessity of constant update studies. The continental aquatic environments, by its relative instability, and proximity to different human activities (industrial, farmland, and city) are more frequently affected by climatic phenomenon and xenobiotic products. When the actions reach the lotic and lentic environments interacts with each member of the communities. The aim of this chapter is analyze and show the effects that it be observed in freshwater decapods due to natural and anthropic stressors. The identification of the process that occurs in the environment is very important, indicating when the species are affected by natural or anthropic stressors. Even more, these variations could affect the trophic web, and alter the transfers of material and energy into the aquatic systems.