Factors affecting the structure of limnetic crustacean zooplankton communities in central Ontario lakes

1975 ◽  
Vol 19 (1) ◽  
pp. 635-643 ◽  
Author(s):  
W. Gary Sprules
Keyword(s):  
Crustacean Zooplankton ◽  
Factors Affecting ◽  
Zooplankton Communities

Changes in the crustacean communities of Lakes Michigan, Huron, and Erie following the invasion of the predatory cladoceran Bythotrephes longimanus

2004 ◽  
Vol 61 (11) ◽  
pp. 2111-2125 ◽  
Author(s):  
Richard P Barbiero ◽  
Marc L Tuchman
Keyword(s):  
Zooplankton Community ◽  
Crustacean Zooplankton ◽  
Bythotrephes Longimanus ◽  
Zooplankton Community Structure ◽  
Cladoceran Species ◽  
Invertebrate Predators ◽  
Predatory Cladoceran ◽  
Leptodora Kindti ◽  
Escape Responses ◽  
Zooplankton Communities

The crustacean zooplankton communities in Lakes Michigan and Huron and the central and eastern basins of Lake Erie have shown substantial, persistent changes since the invasion of the predatory cladoceran Bythotrephes in the mid-1980s. A number of cladoceran species have declined dramatically since the invasion, including Eubosmina coregoni, Holopedium gibberum, Daphnia retrocurva, Daphnia pulicaria, and Leptodora kindti, and overall species richness has decreased as a result. Copepods have been relatively unaffected, with the notable exception of Meso cyclops edax, which has virtually disappeared from the lakes. These species shifts have for the most part been consistent and equally pronounced across all three lakes. Responses of crustacean species to the Bythotrephes invasion do not appear to be solely a consequence of size, and it is likely that other factors, e.g., morphology, vertical distribution, or escape responses, are important determinants of vulnerability to predation. Our results indicate that invertebrate predators in general, and invasive ones in particular, can have pronounced, lasting effects on zooplankton community structure.

Crustacean zooplankton communities in Lake General Carrera (46°S) and their possible association with optical properties

Crustaceana ◽  
2013 ◽  
Vol 86 (4) ◽  
pp. 507-513 ◽  
Author(s):  
Patricio De los Ríos-Escalante ◽  
Esteban Quinán ◽  
Patricio Acevedo
Keyword(s):  
Optical Properties ◽  
Crustacean Zooplankton ◽  
Zooplankton Communities

scholarly journals LAKE ACIDIFICATION AND THE BIOLOGY OF ADIRONDACK LAKES: CRUSTACEAN ZOOPLANKTON COMMUNITIES

1984 ◽  
Vol 1 (1) ◽  
pp. 380-384 ◽  
Author(s):  
James W. Sutherland ◽  
Scott O. Quinn ◽  
Jay A. Bloomfield ◽  
Clifford A. Siegfried
Keyword(s):  
Lake Acidification ◽  
Crustacean Zooplankton ◽  
Adirondack Lakes ◽  
Zooplankton Communities

pH 6 as the threshold to use in critical load modeling for zooplankton community change with acidification in lakes of south-central Ontario: accounting for morphometry and geography

2003 ◽  
Vol 60 (2) ◽  
pp. 151-158 ◽  
Author(s):  
C A Holt ◽  
N D Yan ◽  
K M Somers
Keyword(s):  
Zooplankton Community ◽  
Single Species ◽  
Community Change ◽  
Step Function ◽  
Crustacean Zooplankton ◽  
Load Modeling ◽  
South Central ◽  
Species Abundances ◽  
Community Data ◽  
Zooplankton Communities

Identifying thresholds of biotic community change along stressor gradients may be useful to both ecologists and lake managers; however, there are several weaknesses in the thresholds that have been identified for zooplankton communities along acidity gradients. The thresholds are often based on a single species even though pH sensitivities vary among species. They often measure changes in species occurrences, though abundances may be a more responsive indicator of damage. Their identification may be confounded by spatial and morphometric factors if they are derived from lake surveys. Finally, the thresholds have usually been subjectively identified. Our goal was to establish a threshold in zooplankton community change along an acidity gradient that did not have these four common weaknesses. We used two crustacean zooplankton community metrics: species richness and scores of a correspondence analysis based on species abundances. Spatial and morphometric patterns were detected in the zooplankton community data and then extracted. The relationship between zooplankton and acidity was then modeled using a step function that objectively identified a threshold of community change at pH 6 for lakes in south-central Ontario.

Long-term directional trajectories among lake crustacean zooplankton communities and water chemistry

2018 ◽  
Vol 75 (11) ◽  
pp. 1926-1939 ◽  
Author(s):  
Karl A. Lamothe ◽  
Donald A. Jackson ◽  
Keith M. Somers
Keyword(s):  
Water Chemistry ◽  
Land Use Changes ◽  
Zooplankton Community ◽  
Critical Issue ◽  
Relative Magnitude ◽  
Crustacean Zooplankton ◽  
Acidified Lakes ◽  
Experimental Acidification ◽  
Zooplankton Communities ◽  
Lake Systems

Understanding community responses to disturbance is a long-standing challenge in ecology and will remain a critical issue as human activity continues to alter environmental conditions. This is particularly concerning for freshwater communities, which are often subject to the effects of multiple disturbances on the landscape. With crustacean zooplankton community composition data and associated water chemistry from 19 Ontario lakes, we quantify the relative magnitude and directionality of change over three decades using distances in multivariate ordinations. The data span a gradient of impact from minimally disturbed reference lakes to lakes with known impacts from experimental acidification trials, atmospheric acidification, and regional land-use changes. Most communities exhibited changes from historical conditions, including previously described reference systems. Zooplankton communities in experimentally acidified lakes showed gradual, directional patterns with a return to historical conditions postmanipulation, but have since deviated again from historical conditions. Most zooplankton communities in atmospherically acidified lakes showed gradual, directional trajectories over time. Overall, our results demonstrate that zooplankton communities are changing among both minimally disturbed lake systems and lakes known to be impacted by human activities.

scholarly journals Hypolimnetic Hypoxia Increases the Biomass Variability and Compositional Variability of Crustacean Zooplankton Communities

Water ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2179 ◽  
Author(s):  
Jonathan P. Doubek ◽  
Kylie L. Campbell ◽  
Mary E. Lofton ◽  
Ryan P. McClure ◽  
Cayelan C. Carey
Keyword(s):  
Dissolved Oxygen ◽  
Zooplankton Biomass ◽  
Crustacean Zooplankton ◽  
Biological Variables ◽  
Bottom Waters ◽  
Lakes And Reservoirs ◽  
Compositional Variability ◽  
Zooplankton Communities ◽  
Biomass Variability ◽  
Copepod Biomass

In freshwater lakes and reservoirs, climate change and eutrophication are increasing the occurrence of low-dissolved oxygen concentrations (hypoxia), which has the potential to alter the variability of zooplankton seasonal dynamics. We sampled zooplankton and physical, chemical and biological variables (e.g., temperature, dissolved oxygen, and chlorophyll a) in four reservoirs during the summer stratified period for three consecutive years. The hypolimnion (bottom waters) of two reservoirs remained oxic throughout the entire stratified period, whereas the hypolimnion of the other two reservoirs became hypoxic during the stratified period. Biomass variability (measured as the coefficient of the variation of zooplankton biomass) and compositional variability (measured as the community composition of zooplankton) of crustacean zooplankton communities were similar throughout the summer in the oxic reservoirs; however, biomass variability and compositional variability significantly increased after the onset of hypoxia in the two seasonally-hypoxic reservoirs. The increase in biomass variability in the seasonally-hypoxic reservoirs was driven largely by an increase in the variability of copepod biomass, while the increase in compositional variability was driven by increased variability in the dominance (proportion of total crustacean zooplankton biomass) of copepod taxa. Our results suggest that hypoxia may increase the seasonal variability of crustacean zooplankton communities.

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