| publications-41 |
BOOK SERIES |
2011 |
Feld, C.K. |
From natural to degraded rivers and back again: a test of restoration ecology theory and practice |
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10.1016/b978-0-12-374794-5.00003-1 |
Uncategorized |
Uncategorized |
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No abstract available |
226273 |
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| publications-42 |
PEER REVIEWED ARTICLE |
2011 |
Bennion, H. |
Identifying from recent sediment records the effects of nutrients and climate on diatom dynamics in Loch Leven |
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10.1111/j.1365-2427.2011.02651.x |
Uncategorized |
River Basins |
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Summary1.âChanges in nutrients and climate have occurred over approximately the same timescales in many European lake catchments. Here, we attempt to interpret the sedimentary diatom record of a large shallow lake, Loch Leven, in relation to these pressures using information gained from analysis of longâterm data sets of water quality, climate and planktonic diatoms.2.âThe core data indicate the enrichment of Loch Leven starting in c.â1800â1850, most likely from agricultural practices in the catchment, with a more marked phase since c.â1940â1950 caused by increased phosphorus inputs from sewage treatment works, land drainage and a woollen mill.3.âWhile the recent diatom plankton remains are dominated by taxa associated with nutrientârich conditions, an increase in Aulacoseira subarctica relative to Stephanodiscus taxa since the midâ1980s suggests that reductions in external catchment sources of nutrients (since 1985) may have resulted in partial recovery. This observation accords well with the longâterm monitoring series of water chemistry and phytoplankton.4.âOn a decadalâcentennial scale, the eutrophication signal in the sediment record outweighs any evidence of climate as a control on the diatom community. However, at an interâannual scale, while the diatom data exhibit high variability, there are several changes in species composition in the recent fossil record that may be attributed to climatic controls.5.âThe study highlights the value of a palaeolimnological approach, particularly when coupled with longâterm data sets, for developing our understanding of environmental change at a range of temporal scales. The diatom record in the sediment can be used effectively to track recovery from eutrophication, but requires greater understanding of contemporary ecology to fully interpret climate impacts.6.âThe study illustrates the complexity of ecosystem response to synchronous changes in nutrients and climate, and the difficulty of disentangling the effects of these multiple, interacting pressures. |
226273 |
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| publications-43 |
PEER REVIEWED ARTICLE |
2010 |
SĂžndergaard M. |
Submerged macrophytes as indicators of the ecological quality of lakes |
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10.1111/j.1365-2427.2009.02331.x |
Uncategorized |
Natural Water Bodies |
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Summary1. We analysed submerged macrophyte communities from 300 Danish lakes to determine the efficacy of different species, maximum colonisation depth (Cmax) of plants as well as coverage and plant volume inhabited (PVI) as indicators of eutrophication.2. Most species occurred at a wide range of phosphorus and chlorophyll a (Chla) concentrations, but some species of isoetids (Lobelia, IsoĂ«tes) and Potamogeton (Potamogeton gramineus, Potamogeton alpinus and Potamogeton filiformis) were mainly found at low nutrient concentrations and hence may be considered as indicators of nutrient poor conditions. However, species typically found in nutrientârich conditions, such as Elodea canadensis and Potamogeton pectinatus, were also found at total phosphorus (TP) <0.02âmgâPâLâ1 and Chla <5âÎŒgâLâ1 and therefore cannot be considered as reliable indicators of eutrophic conditions.3. Submerged macrophyte coverage, PVI and the Cmax were negatively correlated with TP and Chla. However, variability among lakes was high and no clear thresholds were observed. At TP between 0.03 and 0.07âmgâPâLâ1 plant coverage in shallow lakes ranged from nearly 0 to 100%, whilst at concentrations between 0.10 and 0.20âmgâPâLâ1 only 29% of the lakes had coverage >10%. Cmax was found to be a useful indicator only in deep lakes with unvegetated areas in the deeper part, whereas the use of coverage was restricted to shallow lakes or shallow areas of deep lakes.4. Overall, submerged macrophytes responded clearly to eutrophication, but the metrics investigated here showed no wellâdefined thresholds. We developed a simple index based on species richness, presence of indicator species, coverage and Cmax, which might be used to track major changes in macrophyte communities and for lake classification. |
226273 |
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| publications-44 |
PEER REVIEWED ARTICLE |
2010 |
Johnson, R.K |
Tracing recovery under changing climate: response of phytoplankton and invertebrate assemblages to decreased acidification. |
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10.1899/09-171.1 |
Simulation & Modeling |
Uncategorized |
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No abstract available |
226273 |
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| publications-45 |
PEER REVIEWED ARTICLE |
2010 |
Hering, D. |
The European Water Framework Directive at the age of 10: a critical review of the achievements with recommendations for the future |
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10.1016/j.scitotenv.2010.05.031 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
226273 |
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| publications-46 |
PEER REVIEWED ARTICLE |
2012 |
Angeler, D. |
Temporal scales and patterns of invertebrate biodiversity dynamics in boreal lakes recovering from acidification |
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10.1890/11-1474.1 |
Simulation & Modeling |
Uncategorized |
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Despite international policy implementation to reduce atmospheric acid deposition and restore natural resources from cultural acidification, evidence of ecological recovery is equivocal. Failure to meet recovery goals means that acidification still threatens biodiversity in many areas of the world. Managers thus need information to manage biodiversity, especially its components that are sensitive to stress (acidâsensitive taxa). We analyzed 20âyear time series (1988â2007) of water quality and littoral invertebrates in acidified and circumâneutral lakes across Sweden to evaluate regional biodiversity dynamics and the extent to which changes in water quality affect these dynamics. We used multivariate time series modeling to (1) test how individual species groups within invertebrate communities track changes in the abiotic environment and (2) reveal congruencies of taxon contributions to species group change across lakes. Chemical recovery in the lakes was equivocal, and increases of pH and alkalinity were observed in subsets of acidified and circumâneutral lakes. Time series analyses revealed two different patterns of species groups for invertebrate communities across lakes; the first species group showed monotonic change over time, while the second group showed fluctuating temporal patterns. These independent species groups correlated distinctly with different sets of environmental variables. Recovery of pH and alkalinity status was associated with species group patterns only in a few lakes, highlighting an overall weak recovery of invertebrate species. The sets of species, including acidâsensitive taxa, composing these species groups differed markedly across lakes, highlighting contextâspecific responses of invertebrates to environmental variation. These results are encouraging because disparate localâscale dynamics maintain the diversity of sensitive invertebrate species on a regional scale, despite persisting acidification problems. Our study can inform and help refine current acidificationârelated policy focused on sensitive biodiversity elements. |
226273 |
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| publications-47 |
PEER REVIEWED ARTICLE |
2011 |
SĂžndergaard, M. |
Using chlorophyll a and cyanobacteria in the ecological classification of lakes |
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10.1016/j.ecolind.2011.03.002 |
Simulation & Modeling |
Uncategorized |
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No abstract available |
226273 |
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| publications-48 |
PEER REVIEWED ARTICLE |
2012 |
Verisssimo, H. |
Ability of benthic indicators to assess ecological quality in estuaries following management |
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10.1016/j.ecolind.2011.06.014 |
IoT & Sensors |
Wastewater Treatment Plants |
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No abstract available |
226273 |
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| publications-49 |
PEER REVIEWED ARTICLE |
2011 |
Baeta, A. |
Modelling the effects of eutrophication, mitigation measures and an extreme flood event on estuarine benthic food webs. |
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10.1016/j.ecolmodel.2010.12.010 |
Uncategorized |
Uncategorized |
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No abstract available |
226273 |
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| publications-50 |
PEER REVIEWED ARTICLE |
2012 |
Gamito, S. |
The importance of habitat-type for defining the reference conditions and the ecological quality status based on benthic invertebrates: The Ria Formosa coastal lagoon (Southern Portugal) case study. |
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10.1016/j.ecolind.2011.08.004 |
Uncategorized |
Wastewater Treatment Plants |
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No abstract available |
226273 |
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