Naslov
Jellyfish outbreaks: natural cycle or stress response effect?

Autori
Benović, Adam ; Lučić, Davor

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
CIESM Workshop Series / Briand, F. - Monte Carlo : CIESM, 2001, 59-62

Skup
Gelatinous zooplankton outbreaks: theory and practice

Mjesto i datum
Napulj, Italija, 29.08.2001. - 01.09.2001

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
jellyfish; hormesis; stress

Sažetak
The overall characteristic of the subtropical marine environment is its dynamic component of seasonality and consequent fluctuations in the abundance of plankton organisms. Under "regular" conditions we can talk about colder and warmer season characterised by successive alteration of particular populations in phytoplankton and zooplankton community. Generally, such of temporal change is known as an annual ecological cycle. Appearance/disappearance of plankton populations do not correspond only to annual periods but also to longer time scale. When (medium term or long term cycles) populations, in any time cycles, appear in a known (average?) abundance we consider it as a "regular conditions". At higher densities we consider such appearance as a bloom. A plankton bloom could be defined as: "A dense concentration of plankton individuals which occurs in response to optimum growth conditions" (Sumich, 1988). An open question is: "what is a dense concentration?" Whatever concentration we would take as an average, additional number of plankton individuals would probably be considered as "abnormal", "irregular", "unexpected" or "exceptional". These events strongly bias the functionality of marine ecosystem and therefore attract wide public curiosity, but the causes of blooms and the mechanisms involved are still a subject of debate among specialist.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA