nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

Patterns in macrozoobenthic assemblages indicate the state of the environment: insights from the Rhine-Meuse estuary
Wijnhoven, S.; Hummel, H. (2011). Patterns in macrozoobenthic assemblages indicate the state of the environment: insights from the Rhine-Meuse estuary. Mar. Ecol. Prog. Ser. 436: 29-50. dx.doi.org/10.3354/meps09210
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoord
    Marien
Author keywords
    Benthic communities; Species diversity; Feeding guilds; Qualityindicators; Reference state; Salinity gradient; Multi-dimensionalscaling

Auteurs  Top 

Abstract
    During the 1960s and early 1970s, the open system of the Rhine-Meuse estuary with a continuous salinity gradient was converted into a series of stagnant fresh water lakes separated by sluices from the North Sea coastal region 'Voordelta'. For the last 50 yr, the macrozoobenthic communities have been monitored intensively, and a large dataset is available on the responses of macrozoobenthic communities to strong disturbances (e. g. transitions in salinity, currents and dynamics) and gradual changes (e. g. changes in pollution and nutrient levels). The current study analyzes patterns and developments in macrozoobenthic compositions in terms of community descriptors (e. g. density, richness, evenness and diversity) and proportional distributions over feeding guilds (suspension feeders, deposit feeders, surface deposit feeders, herbivores, omnivores and predators). We compare historic and present situations and show that communities respond in similar ways (viz. peaking densities co-occurring with decreasing richness and diversity) to large disturbances and that the distribution over the feeding guilds indicates the state of the environment. Although the historic communities showed signs of system deterioration (mainly due to pollutants and nutrients), and at present, exotic species are abundant in the region, historic data were found to be valuable as a reference for what can be expected on the macrozoobenthic level following estuary restoration. This study showed the value of an undisturbed estuary in terms of total macrozoobenthic diversity compared to the series of fresh water lakes now separated from the Voordelta system and raises questions about future plans for a regulated salt water inlet that will be restricted to only 11.5 km inland.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .