Cluster analysis of plankton community structure in 21 lakes along a gradient of trophy

Lyche, A.

doi:10.1080/03680770.1989.11898805

Cited by 10 publications

(14 citation statements)

References 9 publications

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“…Finally these clustering patterns were combined by calculating the ratio between the average abundance values of taxa in each cluster of lakes and in all the sets of lakes (nodal analysis) as reported by Lyche (1990). The average value of the individual ratios of the taxa occurring in each subcluster, obtained by the transposed matrix, indicates the occurrence degree of the grouped taxa in each lake cluster.…”

Section: Methodsmentioning

confidence: 99%

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Relationship between trophic state and plankton community structure in 21 Sicilian dam reservoirs

Naselli-Flores

Barone

1994

Hydrobiologia

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The relationship between the trophic state of 21 Sicilian dam reservoirs and their taxonomic community structure of phytoplankton (87 taxa) as well as zooplankton (45 taxa) have been examined by means of cluster analysis performed using annual average biomass values. The phytoplankton community structure was closely connected with the trophic state of the reservoirs, whereas the zooplankton community structure was related to hydrological regimes peculiar to the individual water bodies and not to the trophic state.

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Section: Methodsmentioning

confidence: 99%

“…Only a few investigations have demonstrated a change in zooplankton community structure in relation to the increasing trophic state of lakes (Persson etal., 1988;Carney & Elser, 1990;Lyche, 1990;Elser & Goldman, 1991).…”

Section: Introductionmentioning

confidence: 99%

Relationship between trophic state and plankton community structure in 21 Sicilian dam reservoirs

Naselli-Flores

Barone

1994

Hydrobiologia

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“…The general decrease along the trophic gradient found for chrysophytes is a well-known ecological feature of this class of often mixotrophic phytoplankton prevailing in the waters of oligotrophic lakes (Sandgren 1988, Lyche 1990). The underlying mechanism explaining the high relative abundance of chrysophytes in oligotrophic lakes is related to severe limitation in dissolved inorganic nutrients, and to the ability of chrysophytes to supplement their nutrient uptake with phagotrophy of bacteria and small phytoplankton.…”

Section: Major Response Patterns and General Ecological Traitsmentioning

confidence: 99%

“…The dominance of Cyanobacteria at the upper end of the trophic gradient is also a well-known response pattern (Lyche 1990, Downing et al 2001, often explained by their adaptation to low light conditions, and their low vulnerability to grazing (Reynolds 1984).…”

Section: Major Response Patterns and General Ecological Traitsmentioning

confidence: 99%

Quantitative responses of lake phytoplankton to eutrophication in Northern Europe

et al. 2008

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Based on the currently largest available dataset of phytoplankton in lakes in northern Europe, we quantified the responses of three major phytoplankton classes to eutrophication.Responses were quantified by modeling the proportional biovolumes of a given group along the eutrophication gradient, using generalized additive models. Chlorophyll-a was chosen as a proxy for eutrophication because all classes showed more consistent responses to Chlorophyll-a than to total phosphorus.Chrysophytes often dominate in (ultra-) oligotrophic lakes, and showed a clear decrease along the eutrophication gradient. Pennate diatoms were found to be most abundant at moderate eutrophication level (spring-samples). Cyanobacteria often dominate under eutrophic conditions, especially in clear-water lakes at chlorophyll-a levels > 10 µg L -1 (late summer samples).We compare the relationships among types of lakes, based on the lake typology of the northern geographic intercalibration group, and among countries sharing common lake types. Significant differences were found especially between humic and clear-water lakes, and between low-and moderately alkaline lakes, but we could not identify significant differences between shallow and deep lakes.Country-specific differences in response curves were especially pronounced between lakes in Norway and Finland, while Swedish lakes showed an intermediate pattern, indicating that countryspecific differences reflect large-scale geographic and climatic differences in the study area.REBECCA MS no.04

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“…when an ecosystem has some inherent stability that keeps it from changing much in response to a change in pressure or perturbation until the threshold is reached. Beyond the threshold, the stability breaks down and large changes occur, either expressed as large fluctuations in an unstable system (Lyche 1990, Andersen 1997 or eventually an abrupt shift to a quite different (and often undesirable) stable state (Scheffer et al 2001). Moreover, the decreased stability results in biodiversity decrease and loss of certain interactions, as reviewed by McCann (2000) and further studied by Rooney et al (2006).…”

Section: Linkage To Ecological Theory: Threshold Responsesmentioning

confidence: 99%

Ecological threshold responses in European lakes and their applicability for the Water Framework Directive (WFD) implementation: synthesis of lakes results from the REBECCA project

et al. 2008

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The objective of this synthesis is to present the key messages and draw the main conclusions from the work on lakes in the REBECCA project, pointing out their links to theoretical ecology and their applicability for the WFD implementation. Type-specific results were obtained from analyses of large pan-European datasets for phytoplankton, macrophytes, macroinvertebrates and fish, and indicators and relationships showing the impact of eutrophication or acidification on these biological elements were constructed. The thresholds identified in many of the response curves are well suited for setting ecological status class boundaries and can be applied in the intercalibration of classification systems. Good indicators for phytoplankton (chrysophytes, cyanobacteria) and macrophytes (isoetids and charaphytes) responses to eutrophication were identified, and the level of eutrophication pressure needed to reach the thresholds for these indicators was quantified. Several existing metrics developed for macrophytes had low comparability and need further harmonisation to be useful for intercalibration of classification systems. For macroinvertebrates, a number of metrics developed for rivers turned out to be less useful to describe lake responses to eutrophication and acidification, whereas other species based indicators were more

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Cluster analysis of plankton community structure in 21 lakes along a gradient of trophy

Cited by 10 publications

References 9 publications

Relationship between trophic state and plankton community structure in 21 Sicilian dam reservoirs

Relationship between trophic state and plankton community structure in 21 Sicilian dam reservoirs

Quantitative responses of lake phytoplankton to eutrophication in Northern Europe

Ecological threshold responses in European lakes and their applicability for the Water Framework Directive (WFD) implementation: synthesis of lakes results from the REBECCA project

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