Zooplankton dynamics in a highly eutrophic microtidal estuary.
Mar Pollut Bull
; 142: 433-451, 2019 May.
Article
en En
| MEDLINE
| ID: mdl-31232322
Mesozooplankton was sampled seasonally in a large microtidal estuary (Peel-Harvey) suffering from massive macroalgal growths and cyanobacterial blooms. Comparisons with other estuaries indicate that eutrophication led to copepod abundance declining and macroalgal-associated species increasing. Mesozooplankton species are almost exclusively autochthonous, i.e. spend entire life cycle within the estuary. Meroplanktonic species are virtually absent because main benthic macroinvertebrate species undergo direct benthic rather than planktotrophic development. There are also few abundant holoplanktonic species. Most species are tychoplanktonic, i.e. benthic and transported into plankton through physical disturbance of sediment. Species number, concentration and Simpson's Index are greater during night than day. Annual cyclical changes in species composition are related closely to changes in salinity. At the most degraded site, nematode concentrations were high and the species number and concentration changed markedly during extreme eutrophication, when oxygen concentrations were low, disrupting annual cyclical changes in species composition.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Zooplancton
/
Estuarios
/
Copépodos
/
Eutrofización
Límite:
Animals
País/Región como asunto:
Oceania
Idioma:
En
Revista:
Mar Pollut Bull
Año:
2019
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Reino Unido