Vertically-challenged limnology; contrasts between deep and shallow lakes

Moss, Brian; Beklioğlu, Meryem; Carvalho, Laurence; Kılınç, Sabri; McGowan, Suzanne; Stephen, Deborah

doi:10.1007/978-94-011-5648-6_27

Cited by 42 publications

(36 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the morphoedaphic index by Vighi & Chiaudani (1985). Even more, the exceptionally high phosphorus concentrations in some meres of North West England included in the analysis may be of natural origin dependent on the local geochemistry (Moss et al, 1997). However, in most cases anthropogenic eutrophication is responsible for high nutrient concentrations in lakes and has become the leading force in structuring lake ecosystems in Europe.…”

Section: Discussionmentioning

confidence: 99%

Factors controlling hydrochemical and trophic state variables in 86 shallow lakes in Europe

Nõges

Tuvikene

et al. 2003

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

In order to disentangle the causes of variations in water chemistry among European shallow lakes, we performed standardised sampling programs in 86 lakes along a latitudinal gradient from southern Spain to northern Sweden. Lakes with an area of 0.1 to 27 000 ha and mean depth of 0.4-5.6 m located in low to high altitudes were investigated within the EC project ECOFRAME 1-4 times during June-October 2000-2001. Several variables like conductivity, alkalinity, abundance of submerged plants, concentrations of suspended solids, total nitrogen and phosphorus were latitude-dependent decreasing from south to north. Secchi depth, concentrations of total nitrogen, total phosphorus, suspended solids, and chlorophyll a correlated strongly with the presumed quality classes of the lakes. We came to the conclusion that the variability of shallow lakes in Europe is still mostly dependent on natural differences. Variables connected to lake morphometry, seasonality, basin geology and climate explained altogether nearly half of the total variability of lakes. The trophic state factor, describing mostly the human influence on lakes, was the strongest single factor responsible for nearly a quarter of the total variability of the studied European lakes.

show abstract

Section: Discussionmentioning

confidence: 99%

Factors controlling hydrochemical and trophic state variables in 86 shallow lakes in Europe

Nõges

Tuvikene

et al. 2003

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

show abstract

“…Of the 79 lakes with suitable data, 4 lakes were excluded from the analysis because they had no outflow (White Mere, Moss et al, 1997), measurement data pre-dated implementation of phosphorus stripping at contributing sewage effluent works (Lyn Penrhyn) or the sewage had been re-directed out of the catchment (Rostherne Mere and Alderfen Broad).…”

Section: Phosphorus Concentration Data For Model Testingmentioning

confidence: 99%

A model‐based assessment of non‐compliance of phosphorus standards for lakes in England and Wales

Duethmann

Anthony

Carvalho

et al. 2009

International Journal of River Basin Management

Self Cite

View full text Add to dashboard Cite

High phosphorus concentrations causing eutrophication will prevent many lakes in England and Wales from reaching good ecological status by 2015 according to the EC Water Framework Directive (WFD). The aim of this study was to estimate the percentage of lakes in England and Wales that are likely to fail recently agreed WFD phosphorus standards. As measured lake phosphorus concentrations are only available for a small number of lakes a model-based approach was adopted. This involved estimating phosphorus loads from a wide range of sources including agricultural loads, sewage effluents, septic tanks, diffuse urban sources, atmospheric deposition, groundwater and bank erosion. Lake phosphorus concentrations were predicted using the Vollenweider model, and the model framework was satisfactorily tested against available observed lake concentration data. Applying the model to all lakes in England and Wales greater than 1 ha, it was estimated that under current conditions, roughly two thirds of the lakes would fail good ecological status with respect to phosphorus. According to our estimates, agricultural phosphorus loads represent the dominant source for the majority of catchments, but diffuse urban runoff also is important in many lakes and sewage effluents are the most frequent dominant source for lake catchments greater than 100 km 2 . Required reductions of phosphorus loads to increase the number of lakes achieving good ecological status and potential delays because of internal loading and biological resistances are briefly discussed.

show abstract

“…Depth in¯uences for example the impact of wind (de Groot 1981;Carper and Bachmann 1984;Gorham and Boyce 1989;Hamilton and Mitchell 1996), light limitation (Reynolds 1989;Petersen et al 1997;Huisman et al 1999), nutrient dynamics (Sùndergaard et al 1992;Moss et al 1997), and the distribution patterns of aquatic animals in lakes (Tessier and Welser 1991;Lacroix and Lescher-MoutoueÂ 1995;Gonzalez and Tessier 1997;Pinel-Alloul et al 1998). Indeed, thermally strati®ed deep lakes are less exposed to the mixing action of wind than unstrati®ed shallow ones.…”

Section: Introductionmentioning

confidence: 98%

Scaling food chains in aquatic mesocosms: do the effects of depth override the effects of planktivory?

1999

View full text Add to dashboard Cite

To assess the effects of physical dimension and planktivorous fish on phytoplankton standing crop, we repeated an experiment at different scales in plastic enclosures during summer 1995 in Lake Créteil, France. Enclosures were scaled for a constant surface (1.5 × 1.5 m) as depth was increased from 2.5 to 4.5 m. Even-link (zooplankton and phytoplankton) and odd-link (planktivorous fish, zooplankton and phytoplankton) food webs were established in both shallow and deep enclosures. Fish densities in the deep enclosures were scaled to allow comparisons with shallow ones for both in individuals m or individuals m. We explicitly designed this experiment to examine the scale-dependent behavior of the top-down mechanism of algal biomass control in lakes, and in particular to test the hypothesis of stronger cascading effects of fish on lower trophic levels at reduced depth. Both fish and enclosure size had highly significant effects on phytoplankton biomass over the duration of the experiment. No depth × fish interaction effects were observed. The presence of planktivorous fish enhanced phytoplankton biomass in both shallow and deep enclosures, although the reduction in depth generally produced a stronger effect. The mean concentration of chlorophyll a in the deep odd-link systems (ca 5 mg m) was lower than in the shallow even-link systems (ca 17 mg m). Statistical interpretation did not change when data were expressed as phytoplankton biomass per unit of surface area. Light limitation and zooplankton grazing are the most probable mechanisms explaining our results in these nutrient-enriched systems. Moreover, we found that the strength of the cascading effect of fish on plankton was not a function of depth. We believe that further studies on scaling effects should be conducted in order to improve our understanding of ecological patterns and to extrapolate results from micro/mesocosms to natural ecosystems.

show abstract

Vertically-challenged limnology; contrasts between deep and shallow lakes

Cited by 42 publications

References 15 publications

Factors controlling hydrochemical and trophic state variables in 86 shallow lakes in Europe

Factors controlling hydrochemical and trophic state variables in 86 shallow lakes in Europe

A model‐based assessment of non‐compliance of phosphorus standards for lakes in England and Wales

Scaling food chains in aquatic mesocosms: do the effects of depth override the effects of planktivory?

Contact Info

Product

Resources

About