Zooplankton Community Dynamics in a Western Mid-Atlantic Lagoonal Estuary

2017 ◽  
Vol 78 ◽  
pp. 141-168 ◽  
Author(s):  
Ursula A. Howson ◽  
Gary A. Buchanan ◽  
James A. Nickels
Keyword(s):  
Community Dynamics ◽  
Zooplankton Community

scholarly journals Impact of fish cage-culture on the community structure of zooplankton in a tropical reservoir

2011 ◽  
Vol 101 (1-2) ◽  
pp. 75-84 ◽  
Author(s):  
Juliana D Dias ◽  
Érica M Takahashi ◽  
Natália F Santana ◽  
Cláudia C Bonecker
Keyword(s):  
Community Structure ◽  
Food Availability ◽  
Community Dynamics ◽  
Zooplankton Community ◽  
Fish Farming ◽  
Spatial And Temporal Variation ◽  
Cage Culture ◽  
Tropical Reservoir ◽  
Zooplankton Community Structure ◽  
The Impact

We investigated the impact of fish cage culture on the zooplankton community structure in a tropical reservoir. We hypothesized that community abundance is greater near cages and increases over time due to the increase in food availability. Samplings were performed near, upstream and downstream from net cages, and before and after net cage installation. The abundance of zooplankton increased 15 days after the experiment was set up, followed by a reduction and finally increased. Rotifer abundance showed significant differences among sites (p<0.05) and sampling periods (p<0.001). Significant differences were also observed in total zooplankton and cladoceran abundance (p<0.001). The spatial and temporal variation of the physical and chemical variables were indirectly correlated with the structure and dynamic of the zooplankton community, as they indicated the primary production in the environment. Our hypothesis was rejected, since the zooplankton was abundant at the reference site. Only rotifers showed higher abundance near cages, due to the influence of food availability. Community dynamics during the experiment was also correlated to food availability. Our results suggest an impact of fish farming on the zooplankton community.

scholarly journals Zooplankton community dynamics and environmental factors in Lake Ozeros (Greece)

2013 ◽  
Vol 14 (3) ◽  
pp. 32 ◽  
Author(s):  
E. CHALKIA ◽  
G. KEHAYIAS
Keyword(s):  
Community Dynamics ◽  
Zooplankton Community ◽  
Trophic State Index ◽  
Zooplankton Abundance ◽  
The Novel ◽  
Effective Management ◽  
Eutrophic Lakes ◽  
State Index ◽  
The Mean ◽  
One Year

A one year investigation of the zooplankton community composition and dynamics in Lake Οzeros (western Greece) revealed 25 invertebrate species (16 rotifers, three copepods, five cladocerans and one mollusc larva). The mean zooplankton abundance fluctuated between 59.4 to 818 ind l-1, having maximum values in spring. The species composition and seasonal variation do not differentiate Lake Ozeros from the nearby lakes. The presence of the dominant calanoid copepod Eudiaptomus drieschi and some of the rotifer species recorded are characteristics of either oligo- or eutrophic lakes. According to the trophic state index (TSI) Lake Ozeros is a meso-eutrophic ecosystem, in which the eutrophic character was possibly the result of the high charge with phosphorus (being raised by 28.9 % in comparison to previous decades), which came into the lake via the surrounding agricultural cultivations and mainly the pig-raising activities. In contrast, the concentrations of ΝΟ3, ΝΟ2 and NH4 have considerably decreased possibly due to the termination of the tobacco cultivations around the lake during the last years. The novel information on the abiotic and especially the biotic elements of Lake Ozeros provided by the present study can contribute to the effective management of this aquatic ecosystem in the future.

scholarly journals Covariation between zooplankton community composition and cyanobacterial community dynamics in Lake Blaarmeersen (Belgium)

2008 ◽  
Vol 63 (2) ◽  
pp. 222-237 ◽  
Author(s):  
Ineke Van Gremberghe ◽  
Jeroen Van Wichelen ◽  
Katleen Van der Gucht ◽  
Pieter Vanormelingen ◽  
Sofie D'hondt ◽  
...  
Keyword(s):  
Community Composition ◽  
Community Dynamics ◽  
Zooplankton Community ◽  
Cyanobacterial Community

scholarly journals Zooplankton community dynamics in relation to the seasonal cycle and nutrient inputs in an urban tropical estuary in Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 751-762 ◽  
Author(s):  
HMP. Araujo ◽  
DA. Nascimento-Vieira ◽  
S. Neumann-Leitão ◽  
R. Schwamborn ◽  
APO. Lucas ◽  
...  
Keyword(s):  
Community Dynamics ◽  
Zooplankton Community ◽  
Urban Pollution ◽  
Northeastern Brazil ◽  
Light Limitation ◽  
Nutrient Inputs ◽  
Salinity Regime ◽  
Poor Water Quality ◽  
Dry Seasons ◽  
Nitrite Nitrate

Micro- and mesozooplankton were studied in the Sergipe estuary, northeastern Brazil, in order to assess the temporal variability in abundance and biodiversity under stressed conditions (urban pollution). Zooplankton samples and abiotic data were collected at one station during a full tidal cycle in July 2001 and in February 2002, corresponding to the rainy and dry seasons, respectively. The salinity regime was euhaline-polyhaline. Phosphate and dissolved oxygen were higher in July 2001, and nitrite, nitrate and ammonia in February 2002. Chlorophyll-a concentrations were low as a result of light limitation, with 1.18 ± 0.88 µg.m-3 in February and 1.53 ± 1.48 µg.m-3 in July. Fifty-nine zooplankton taxa were identified. Microzooplankton were abundant, mainly the tintinnid Favella ehrenbergii, and ranged from 18,649 ind.m-3 in July to 678,009 ind.m-3 in February. Mesozooplankton ranged from 1,537 ind.m-3 in July to 37,062 ind.m-3 in February and were dominated by barnacle nauplii in July and by copepods in February. The cluster analysis by taxa revealed the existence of three distinct groups: resilient species, characteristic of estuarine areas and occurring during all the year; species mainly more abundant in July (indicators of a healthier environmental condition); and species more abundant in February (tolerant to poor water quality).

Zooplankton and environmental factors of a recovering eutrophic lake (Lysimachia Lake, Western Greece)

Biologia ◽  
2013 ◽  
Vol 68 (3) ◽  
Author(s):  
Ekaterini Chalkia ◽  
George Kehayias
Keyword(s):  
Community Dynamics ◽  
Zooplankton Community ◽  
Eutrophic Lake ◽  
Nutrient Concentrations ◽  
Eutrophic Lakes ◽  
Trophic Conditions ◽  
Urban Sewage ◽  
The Past ◽  
Unique Species ◽  
Western Greece

AbstractThe present study investigates the zooplankton community dynamics and the abiotic environment in the eutrophic Lake Lysimachia (western Greece). The lake is considered to be recovering from eutrophication after the termination of an urban sewage inflow in 2000, and its waters are replenished constantly from the nearby oligotrophic Lake Trichonis. The results show that, although a decrease in nutrient concentrations was observed compared to the past, the lake still has eutrophic characteristics. This was reflected in the zooplankton community which is typical of those found in eutrophic lakes where rotifers prevail. Similarities among this lake and other nearby lakes were found considering the zooplankton community composition and seasonal variation. However, Lake Lysimachia is inhabited also by a number of different and even unique species (e.g., Moina micrura), suggesting that this ecosystem may be an important biodiversity refuge. Most of the zooplankton species were correlated with water temperature and, to a lesser extent, eutrophication key-water quality variables. Although there are few available data on the zooplankton of the lake, the abundance and composition of the community presenting characteristics indicative of intermediate trophic conditions and suggesting that the lake is probably under a kind of “biological” recovery.

scholarly journals Persistent vs. ephemeral invasions: 8.5 years of zooplankton community dynamics in the Columbia River

2015 ◽  
Vol 60 (2) ◽  
pp. 527-539 ◽  
Author(s):  
Eric Dexter ◽  
Stephen M. Bollens ◽  
Gretchen Rollwagen-Bollens ◽  
Josh Emerson ◽  
Julie Zimmerman
Keyword(s):  
Community Dynamics ◽  
Zooplankton Community ◽  
Columbia River
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