INVESTIGADORES
DIEGUEZ Maria Del Carmen
congresos y reuniones científicas
Título:
Synergic effect between temperature and ultraviolet radiation on aquatic
Autor/es:
P. E. GARCÍA, M. C DIEGUEZ & H. E. ZAGARESE
Lugar:
Lake Placid, Florida , USA
Reunión:
Conferencia; GLEON 6; 2008
Institución organizadora:
GLEON
Resumen:
It is well known that the increase in solar irradiance is threatening both ecosystem and
organism of mid inhabiting mid and high latitudes of the earth. At the organism level,
different mechanisms and strategies provide protection to endure life at high irradiance
and particularly, to cope with high ultraviolet radiation (RUV) levels. The accumulation
of Photoprotective compounds (PPCs), such as carotenoids and mycosporine-like amino
acids (MAAs) has been shown to improve the survivorship of aquatic organisms
exposed to high levels of RUV. In this study we analyzed the variability of carotenoids
and MAAs in a calanoid copepod in relation to temperature and RUV. The crustaceans
were collected from the shallow pond Los Juncos (North Patagonia, Argentina). The
results of laboratory incubation show up that PPCs (both MAAs and Carotenoids) were
highest at 16ºC in the presence of visible light (PAR + UV-A). Remarkably the
survivorship of the copepod decrease with increasing temperature and in the presence of
visible light. This may be related to the fact that Boeckella species are cold-adapted and
as reflected by they occurrence at mid and lower latitudes during cold months. Thus,
as reflected by they occurrence at mid and lower latitudes during cold months. Thus,
as reflected by they occurrence at mid and lower latitudes during cold months. Thus,
as reflected by they occurrence at mid and lower latitudes during cold months. Thus,
Boeckella species are cold-adapted and
as reflected by they occurrence at mid and lower latitudes during cold months. Thus,
Boeckella may be vulnerable to the increase in temperature which could condition their
occurrence resulting in changes in geographical distribution as has been observed in
several different animal and plant.
occurrence resulting in changes in geographical distribution as has been observed in
several different animal and plant.
occurrence resulting in changes in geographical distribution as has been observed in
several different animal and plant.
occurrence resulting in changes in geographical distribution as has been observed in
several different animal and plant.
may be vulnerable to the increase in temperature which could condition their
occurrence resulting in changes in geographical distribution as has been observed in
several different animal and plant.