Insights from long-term studies in the Windermere catchment: external stressors, internal interactions and the structure and function of lake ecosystems

Maberly, Stephen C.; Elliott, J. Alex

doi:10.1111/j.1365-2427.2011.02718.x

Cited by 46 publications

(36 citation statements)

References 84 publications

(159 reference statements)

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“…Long-term studies are essential for understanding ecological processes such as the influence of stressors and are basic for modeling, but are few in number because of their inherent difficulties, including costs (Jackson and Füreder, 2006;Maberly and Elliott, 2012). In particular, long-term studies of zooplankton can reveal the influence of past factors, including management decisions (Hambright, 2008).…”

Section: Introductionmentioning

confidence: 99%

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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INTRODUCTIONLong-term studies are essential for understanding ecological processes such as the influence of stressors and are basic for modeling, but are few in number because of their inherent difficulties, including costs (Jackson and Füreder, 2006;Maberly and Elliott, 2012). In particular, long-term studies of zooplankton can reveal the influence of past factors, including management decisions (Hambright, 2008). Some causes of changes in the zooplankton that are perceptible over a longer period include alterations of abiotic factors or predator invasion (Yan et al., 2008).The factors that affect the diversity and size of zooplankton species are intriguing issues, but still subject to controversy. From the classic paper by Brooks and Dodson (1965) to recent studies, several factors have been contemplated, and temperature has emerged as the preponderant factor for explaining latitudinal differences in zooplankton body size (Gillooly and Dodson, 2000). Gillooly and Dodson compared more than 1100 lakes located between 81°N and 77°S latitude, and found that the size variation of cladoceran species was related to latitude, with smaller sizes in the tropics and the Arctic and a greater difference between the tropics and the temperate zone. According to these authors, the highest mean sizes were observed between 6°C and 8°C, declining at higher or lower temperatures. Havens et al. (2015), comparing 122 lakes located from 6° to 74°N and from 19° to 21°S, showed a relationship between size (as weight) of cladocerans and cyclopoid copepods and temperature. In contrast, Iglesias et al. (2011) suggested that predation by fish is the major factor explaining the smaller size of zooplankton in warm lakes. Hart and Bychek (2011), in their extensive review of the many factors that could potentially influence zooplankton size, addressed extrinsic factors such as temperature, food and predation, amongst others, besides intrinsic ones. The authors concluded, however, that although a general pattern may occur, different results can arise from distinct ecosystems.J. Limnol., 2015; 74(3): 606-617 ORIGINAL ARTICLE DOI: 10.4081/jlimnol.2015DOI: 10.4081/jlimnol. .1132 A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

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Section: Introductionmentioning

confidence: 99%

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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“…The functioning of these freshwater ecosystems is tightly linked to external conditions operating from local to global scales [2] and is subject to multiple stressors arising from human activity and long-term change in background conditions [2]–[5]. Among the external stressors affected by global changes, climate change remains the most studied phenomenon that will most likely impact freshwater ecosystems in future decades (Figure S1).…”

Section: Introductionmentioning

confidence: 99%

Projecting the Impact of Regional Land-Use Change and Water Management Policies on Lake Water Quality: An Application to Periurban Lakes and Reservoirs

et al. 2013

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As the human population grows, the demand for living space and supplies of resources also increases, which may induce rapid change in land-use/land-cover (LULC) and associated pressures exerted on aquatic habitats. We propose a new approach to forecast the impact of regional land cover change and water management policies (i.e., targets in nutrient loads reduction) on lake and reservoir water eutrophication status using a model that requires minimal parameterisation compared with alternative methods. This approach was applied to a set of 48 periurban lakes located in the Ile de France region (IDF, France) to simulate catchment-scale management scenarios. Model outputs were subsequently compared to governmental agencies’ 2030 forecasts. Our model indicated that the efforts made to reduce pressure in the catchment of seepage lakes might be expected to be proportional to the gain that might be obtained, whereas drainage lakes will display little improvement until a critical level of pressure reduction is reached. The model also indicated that remediation measures, as currently planned by governmental agencies, might only have a marginal impact on improving the eutrophication status of lakes and reservoirs within the IDF region. Despite the commitment to appropriately managing the water resources in many countries, prospective tools to evaluate the potential impacts of global change on freshwater ecosystems integrity at medium to large spatial scales are lacking. This study proposes a new approach to investigate the impact of region-scale human-driven changes on lake and reservoir ecological status and could be implemented elsewhere with limited parameterisation. Issues are discussed that relate to model uncertainty and to its relevance as a tool applied to decision-making.

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“…The lake receives high annual rainfall, reaching an average of 1,900 mm per year. It has a moderate alkalinity (0.4 mequiv/L) and is currently is eutrophic (21 g/L and 630 g/L for average TP and maximum winter NO 3 -N, respectively) and typically remains thermally stratified from the end of April to the middle of October (Maberly and Elliott, 2012).…”

Section: Study Sitementioning

confidence: 99%

“…A monitoring programme, starting at Esthwaite Water in the early 1940s, provides long-term data for various chemical and biological variables (Maberly and Elliott, 2012). Additionally, a number of contemporary and palaeo-limnological studies have been undertaken at the site (see review in Bennion et al, 2000;George, 2012).…”

Section: Study Sitementioning

confidence: 99%

“…Phytoplankton samples have been collected from the deepest part of Esthwaite Water since 1943, initially by Freshwater Biology Association (FBA) and since 1989 by the Centre of Ecology and Hydrology, generally on a fortnightly-monthly basis (Maberly and Elliott, 2012). Integrated surface water samples (0-5 m) were collected using a weighted plastic tube and preserved with Lugol's iodine for further lab analysis.…”

Section: Field Samplingmentioning

confidence: 99%

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Identifying sediment discontinuities and solving dating puzzles using monitoring and palaeolimnological records

et al. 2016

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Palaeolimnological studies should ideally be based upon continuous, undisturbed sediment sequences with reliable chronologies. However for some lake cores, these conditions are not met and palaeolimnologists are often faced with dating puzzles caused by sediment disturbances in the past. This study chooses Esthwaite Water from England to illustrate how to identify sedimentation discontinuities in lake cores and how chronologies can be established for imperfect cores by correlation of key sediment signatures in parallel core records and with longterm monitoring data . Replicated short cores (ESTH1, ESTH7, and ESTH8) were collected and subjected to loss-on-ignition, radiometric dating ( 210 Pb, 137 Cs, and 14 C), particle size, trace metal, and fossil diatom analysis. Both a slumping and a hiatus event were detected in ESTH7 based on comparisons made between the cores and the long-term diatom data. Ordination analysis suggested that the slumped material in ESTH7 originated from sediment deposited around 1805-1880 AD. Further, it was inferred that the hiatus resulted in a loss of sediment deposited from 1870 to 1970 AD. Given the existence of three superior 14 C dates in ESTH7, ESTH1 and ESTH7 were temporally correlated by multiple palaeolimnological proxies for age-depth model development. High variability in sedimentation rates was evident, but good agreement across the various palaeolimnological proxies indicated coherence in sediment processes within the coring area. Differences in sedimentation rates most likely resulted from the natural morphology of the lake basin. Our study suggests that caution is required in selecting suitable coring sites for palaeolimnological studies of small, relatively deep lakes and that proximity to steep slopes should be avoided wherever possible. Nevertheless, in some cases, comparisons between a range of contemporary and palaeolimnological records can be employed to diagnose sediment disturbances and establish a chronology.

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Insights from long-term studies in the Windermere catchment: external stressors, internal interactions and the structure and function of lake ecosystems

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Cited by 46 publications

References 84 publications

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

Projecting the Impact of Regional Land-Use Change and Water Management Policies on Lake Water Quality: An Application to Periurban Lakes and Reservoirs

Identifying sediment discontinuities and solving dating puzzles using monitoring and palaeolimnological records

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