Marine and Atmospheric Sciences: dynamics of diatoms and dinoflagellates in Tumaco Bay (Colombia) under the influence of climatic changes during the period 1995-2001.This analysis was based in the information gathered in Tumaco's Bay (Colombia) during the years 1995 to 2000 to obtain a general picture of the dynamics of the community of diatoms diatoms a series of unicellular algae, microscopic in size, with cell walls containing silica. Members of the family Diatomaceae. Their remains accumulate as geological deposits and are mined. See diatomaceous earth. and dinoflagellates dinoflagellates minute aquatic protozoa; they produce red pigment and toxins which are taken up by shellfish without apparent ill effect, but the toxin is not metabolized and the shellfish may poison animals if eaten. in response to climatic changes and natural phenomena, such as "El Nino" and "La Nina," which potentially affect the composition of these groups. An increase in the population of diatoms was observed during La Nina and a decrease during El Nino. The response by the dinoflagellate dinoflagellate Any of numerous one-celled, aquatic organisms that have two dissimilar flagella and characteristics of both plants (algae) and animals (protozoans). Most are microscopic and marine. group was completely opposite. The range of temperature in which the major abundance of diatoms occurred was from 26 to 27.5 [degrees]C, and for the dinoflagellates it was from 28 to 31 [degrees]C. The dynamics of the phytoplankton phytoplankton Flora of freely floating, often minute organisms that drift with water currents. Like land vegetation, phytoplankton uses carbon dioxide, releases oxygen, and converts minerals to a form animals can use. also showed a close relation with other variables, including daytime, months and nutrients. Ingrid Garcia-Hansen, Centro Control Contaminacion del Pacifico. Tumaco, Colombia |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion