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Preferencia térmica y tolerancia de los alvinelídeos

Peter R Girguis¹, Raymond W Lee

¹Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA. pgirguis@oeb.harvard.edu

Science (New York, N.Y.)

|April 15, 2006

Resumen

Los gusanos marinos Paralvinella sulfincola prosperan en el calor extremo. Estas poliquetas termotolerantes prefieren temperaturas de hasta 50°C, con algunas duraderas de 55°C, mostrando una notable adaptación al calor en fuentes hidrotermales de aguas profundas.

Área de la Ciencia:

Biología marina Biología marina.
Ecología de las profundidades marinas.
La investigación extremófila es una investigación extremófila.

Sus antecedentes:

Las fuentes hidrotermales albergan ecosistemas únicos con temperaturas extremas.
El gusano poliqueto Paralvinella sulfincola habita en estos entornos de altas temperaturas.
Comprender los límites térmicos de los organismos de ventilación es crucial para la investigación de aguas profundas.

Objetivo del estudio:

Para investigar la tolerancia térmica y la preferencia de Paralvinella sulfincola.
Para cuantificar los límites de temperatura superiores que estos gusanos pueden soportar.
Para explorar la termorregulación del comportamiento de P. sulfincola en condiciones de ventilación simuladas.

Principales métodos:

Desarrollo de un acuario especializado de alta presión que simule gradientes térmicos in situ.
Observación del movimiento y comportamiento de P. sulfincola dentro de gradientes térmicos controlados.
Medición de los tiempos de supervivencia a temperaturas elevadas.

Principales resultados:

Paralvinella sulfincola exhibió termotaxis, prefiriendo activamente las temperaturas entre 40 ° C y 50 ° C.
Los gusanos individuales sobrevivieron a 50°C durante toda la duración experimental de 7 horas.
Algunos individuos de P. sulfincola soportaron temperaturas tan altas como 55°C durante más de 15 minutos.

Conclusiones:

Alvinellid polichaetes, incluida P. sulfincola, demuestran una preferencia por las altas temperaturas.
Paralvinella sulfincola se encuentra entre los organismos marinos conocidos con mayor tolerancia a la temperatura.
Estos hallazgos resaltan las notables adaptaciones de la vida en los ecosistemas de respiraderos hidrotermales de aguas profundas.

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