Synoptic limnology of a diverse geological region: catchment and water chemistry

Gibson, C. E.; Wu, Ya; Smith, S. Jerrod; Wolfe-Murphy, S.A.

doi:10.1007/bf00017692

Cited by 36 publications

(26 citation statements)

References 11 publications

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“…With an increasing ratio, processes occurring in the catchment and the lake itself progressively modify the chemistry of the lake. In upland catchments such as these, there is likely to be scavenging of N (Gibson et al ., 1995a), P (Likens et al ., 1985) and probably also potassium, particularly in forested catchments (O'Carrol & McCarthy, 1973; Gibson et al ., 1995b), and the major ion chemistry will by affected by exchange with soils. However, some of the catchment : lake area ratios in this data set are large (Table 2), which will cause high flushing rates in the lakes, particularly in these upland areas with high precipitation and inhibit phytoplankton development by losses down the outflow (Reynolds & Lund, 1988).…”

Section: Discussionmentioning

confidence: 99%

Nutrient limitation of phytoplankton and periphyton growth in upland lakes

Maberly¹,

King

Dent³

et al. 2002

Freshwater Biology

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SUMMARY 1. Thirty small upland lakes in Cumbria, Wales, Scotland and Northern Ireland were visited three times between April and August 2000. On each occasion water chemistry was measured and phytoplankton bioassays were performed in the laboratory to assess growth‐rate and yield limitation by phosphorus and nitrogen. In addition, yield limitation of periphyton growth was investigated twice, in situ, using nutrient‐diffusing substrata. 2. Over the whole season the percentage frequency of P, N and co‐limitation was 24, 13 and 63%, respectively, for phytoplankton rate limitation and 20, 22 and 58%, respectively, for phytoplankton yield limitation. 3. A clear response of periphyton yield to nutrient additions was found in 75% of all cases and of these, co‐limitation was most common (54%). Average percentage frequency for P and N limitation was 26 and 20%, respectively. 4. Phytoplankton and periphyton showed seasonal changes in nutrient limitation within sites. In particular, co‐limitation became progressively more common as the season progressed. 5. The response of phytoplankton growth rate to ammonium and nitrate addition was identical, but ammonium was a slightly better source of nitrogen than nitrate for phytoplankton yield on 7% and for periphyton yield on 10% of the occasions. However, the magnitude of the effect was small. 6. The concentration of dissolved inorganic nitrogen (DIN) and the molar ratio of DIN to total dissolved phosphorus (TDP), appeared to be the main environmental factors controlling the extent of nitrogen or phosphorus limitation at a given site. Nitrogen limitation was more likely than phosphorus limitation where the DIN was <6.5 mmol m−3 and the ratio of DIN : TDP was <53. Co‐limitation was the most likely outcome at a DIN concentration <13 mmol m−3 and at a DIN : TDP molar ratio <250. Above these values phosphorus limitation was most likely. 7. The relatively high frequency of nitrogen limitation and co‐limitation at higher N : P ratios than previously reported, may result from the inability of nitrogen‐fixing cyanobacteria to thrive in these upland lakes where pH and the concentration of phosphorus tended to be low and where flushing rates tended to be high.

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Section: Discussionmentioning

confidence: 99%

Nutrient limitation of phytoplankton and periphyton growth in upland lakes

Maberly¹,

King

Dent³

et al. 2002

Freshwater Biology

Self Cite

183

132

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“…Generalised assumptions about the relationship between lake trophic patterns and landscape parameters such as lake position, lake‐order, altitude and temperature (e.g. Engstrom & Hansen, 1985; Gee & Duigan, 1993; Gibson et al ., 1995; Kratz et al ., 1997; Müller et al ., 1998; Soranno et al ., 1999; Riera et al ., 2000; Kling et al ., 2000; Anderson et al ., 2001) still need to be investigated further before such assumptions in quantitative models can be accepted. Difficulties might arise if a lake, for example, experienced an oligotrophication process during a time of rising temperatures (e.g.…”

Section: Discussionmentioning

confidence: 99%

Distribution of chironomids (Diptera) in low arctic West Greenland lakes: trophic conditions, temperature and environmental reconstruction

2002

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1. Surface sediment samples of subfossil chironomid head capsules from 47 lakes in southern West Greenland were analysed using multivariate numerical methods in order to explore the relationship between chironomid assemblages and selected environmental variables. The study lakes are located along a climate gradient ranging from coastal maritime conditions near the Davis Strait to a continental climate near the margin of the Greenland ice sheet. 2. High‐resolution surface water temperatures were measured through the summer season using automatic data loggers in 21 of the study lakes. The mean July surface water temperature (1999) ranged from 7.3 to 16.5 °C in the data set. 3. In all lakes, a total of 24 chironomid taxa were recorded; Micropsectra, Psectrocladius, Chironomus and Procladius were the dominant genera. There was a strong correlation between the trophic variables [total nitrogen and total phosphorus (TN, TP)] and temperature, and in redundancy analysis (RDA) the three variables explained almost equal significant amounts of variation in the chironomid data (19.8–22.3%). However, temperature lost significant explanatory power when the effect of TN was partialled out in RDA. 4. The lakes were classified using two‐way indicator species analysis (TWINSPAN) into eight groups defined by temperature, trophic variables, salinity (conductivity) and lake‐morphometric data. Fourteen chironomid taxa showed significant differences in percentage abundances among groups, with Heterotrissocladius, Micropsectra, Ablabesmyia and Chironomus as the most robust group‐indicator taxa. Forward selection of taxa in multiple discriminant analysis was used to fit chironomid assemblages into lake groups. Using only eight taxa, 95% of lakes were correctly classified at a second TWINSPAN division level (four groups) and 85% of lakes at a third division level (eight groups). 5. This study showed that there is considerable potential in using subfossil chironomid head capsules as paleoenvironmental indicators in both short‐ and long‐term (down‐core) studies of lake ontogeny and palaeoclimate conditions in West Greenland. However, because of the strong correlation between temperature and trophic variables, a quantitative reconstruction of lake‐ and habitat‐type is recommended, in combination with direct reconstruction of single variables such as temperature.

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“…Second, how have the trajectories of changes in trophic status of such lakes varied over the last c. 100-200 years? Eutrophication is most commonly associated with increased availability of phosphorus (P) (Ule´n & Kalisky, 2005;Smith et al, 2005) or nitrogen (Bergstrom et al, 2005) and is considered the principal pressure on lake water quality in the Irish Ecoregion (EHS, 2000;Jennings et al, 2003). Increased loadings of P to lakes (e.g., Battarbee, 1978;Anderson, 1990Anderson, , 1997Anderson & Rippey, 1994;Gibson et al, 1995;Bowman & Clabby, 1998;Linnane & Murray, 2002;Foy et al, 2003;Jordan & Rippey, 2003;Barker et al, 2005;Davies et al, 2005;Miettinen et al, 2005;Reid, 2005;Reavie et al, 2006;Leira et al, in press) are commonly attributed to discharges of municipal and industrial waste (Smith et al, 1999) and agricultural intensification, with diffuse agricultural sources often considered the main contributor (Lucey et al, 1999;EHS, 2000;Jennings et al, 2003;Smith et al, 2005). Eighteen percent of a total of 492 lakes in the Republic of Ireland surveyed during the period 2001-2003 were assigned a eutrophic or hypertrophic status (Toner et al, 2005), while more than 50% of c. 600 lakes in Northern Ireland surveyed in the 1980s and 1990s were classed as eutrophic (HMSO, 1990;Gibson et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

et al. 2006

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Palaeolimnological data from six mesotrophic, eutrophic and hypertrophic lakes in the Irish Ecoregion, in the form of microfossil (cladocera, diatoms and pollen) and sediment chemistry data from radiometrically dated sediment cores, were used to reconstruct past variations in lake water quality and catchment conditions. Basal sediments from sediment cores from the six sites ranged in age from the late 18th century to the early 20th century. A weighted averaging partial least squares regression model was developed to reconstruct past epilimnetic total phosphorus concentrations. The results indicate that all but one of the study sites currently are in a far more productive state compared with the beginning of the sediment core record and that those same five lakes have experienced accelerated enrichment post c. 1980. Two of the sites demonstrated long-term enrichment, in one case beginning in the late 19th century, while both eutrophication and oligotrophication have occurred at three sites. The results highlight the difficulties in applying a general temporal end-point for reference conditions and demonstrate that productive lakes in the Irish Ecoregion have complex, locally specific and often long histories of enrichment. These may not be responsive to reduced external loadings of phosphorus and, as a result, restoration could prove particularly challenging. The results also provide evidence of the ways in which palaeolimnological techniques can assist implementation of the EU Water Framework Directive.

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Synoptic limnology of a diverse geological region: catchment and water chemistry

Cited by 36 publications

References 11 publications

Nutrient limitation of phytoplankton and periphyton growth in upland lakes

Nutrient limitation of phytoplankton and periphyton growth in upland lakes

Distribution of chironomids (Diptera) in low arctic West Greenland lakes: trophic conditions, temperature and environmental reconstruction

Recent histories of six productive lakes in the Irish Ecoregion based on multiproxy palaeolimnological evidence

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