Revisión del 14:36 4 jul 2010

Un bloom de algas es un incremento rapido o acumulacion de la poblacion de algas en un sistema acuatico. Los bloom de algas pueden ocurrir tanto en medioambientes de agua dulce como en sistemas marinos. En ganeral, en un bloom solo participa una o un numero limitada de especies de fitoplancton, algunos blooms pueden ser identificados pro la coloración del agua causada por la alta densidad de celulas pigmentadas. Si bien no existe un valor limite oficial, en general se considera que las algas se encuentran en un bloom cundo su concentracion es del orden de cientos a miles de celulas por mililitro, dependiendo de la virulencia del brote. Las concentraciones en un bloom de algas pueden llegar hasta valores de millones de celulas por mililitro. A menudo los bloom de algas son verdes, pero pueden tomar otras tonalidades tales como marrón-amarillento o rojo, dependiendo de las especie de algas involucradas.

Los bloom de color verde brillante son consecuencia de algas azul-verdosas, que en realidad son bacterias (cianobacteria). Los blooms pueden tambien deberse a especies de macroalgas en lugar de fitoplancton. Estos blooms son reconocibles por grandes conjuntos de algas que pueden ser depositados sobre la orilla costera.

Un caso importante de destacar son los blooms de algas dañinos, que son eventos de bloom de algas que involucran fitoplancton toxico o dañino tales como dinoflagelados del género Alexandrium y Karenia. Este tipo de blooms a menudo toman coloraciones rojizas o amarronadas y son denominadas mareas rojas. ]</ref>

In 2005 the Canadian HAB was discovered to have come further south than it has in years prior by a ship called The Oceanus, closing shellfish beds in Maine and Massachusetts and alerting authorities as far south as Montauk (Long Island, NY) to check their beds.^[1] Experts who discovered the reproductive cysts in the seabed warn of a possible spread to Long Island in the future, halting the area's fishing and shellfish industry and threatening the tourist trade, which constitutes a significant portion of the island's economy.
Brittany, in France, is currently experiencing recurring algal booms caused by the high amount of fertilizer discharging in the sea due to intensive pig farming, causing lethal gas emissions that already killed.^[2]

-->

=Véase también

Referencias

↑ Moore, Kirk. «Northeast Oysters: The bigger danger, growers assert, would be the label of endangered». National Fisherman. Consultado el 31 de julio de 2008.
↑ [1]

Enlaces externos

Wikimedia Commons alberga una categoría multimedia sobre Proliferación de algas.
Harmful Algal Bloom information from the Florida Fish and Wildlife Conservation Commission Fish and Wildlife Research Institute
Harmful Algae and Red Tide Information from the Coastal Ocean Institute, Woods Hole Oceanographic Institution
Toxic Blooms: Understanding Red Tides, a seminar by the Woods Hole Oceanographic Institution
Gulf of Mexico Dead Zone and Red Tides
Human Illness caused by Algae, an excellent summary.
Red Tide Report A Compilation of citizen based, media and official reports of the locations and severity of current Red Tide Blooms.
Florida Red Tide Coalition A citizen based group dedicated to raising awareness of Red Tide, debunking myths, educating the public and taking action to promote our oceans' health and help stop red tide.
Red Tide updates for the Gulf Coast of Florida provided by Mote Marine Laboratory in Sarasota, FL
Harmful Algal Blooms Observing System (HABSOS)
The Belgian Blooms Monitoring project
Social & Economic Costs of Harmful Algal Blooms from "NOAA Socioeconomics" website initiative
GEOHAB: The IOC-SCOR International Research Programme on the Global Ecology and Oceanography of Harmful Algal Blooms [SCOR and IOC of UNESCO]
Harmful Algal Bloom Programme of the Intergovernmental Oceanographic Commission of UNESCO [IOC of UNESCO
International Society for the Study of Harmful Algae [ISSHA
NOAA Marine Biotoxins Program, National Oceanic and Atmospheric Administration
California Program for Regional Enhanced Monitoring for PhycoToxins, California Department of Health Services and the University of California, Santa Cruz
Red Tide FAQ, Florida's Fish and Wildlife Research Institute
NIEHS study of airborne impacts of Florida red tide
Washington State Shellfish Biotoxin Program
Rescue Effort Under Way After 5th Dolphin Death
abs-cbnnews.com, BFAR reiterates ban on eating shellfish from five provinces
[2]
Plantilla:Eol

[1] Moore, Kirk. «Northeast Oysters: The bigger danger, growers assert, would be the label of endangered». National Fisherman. Consultado el 31 de julio de 2008.

[2] [1]

[1]

[2]