| publications-1151 |
PEER REVIEWED ARTICLE |
2017 |
Naicheng Wu , Xuhui Dong , Yang Liu , Chao Wang , Annette Baattrup-Pedersen , Tenna Riis |
Using river microalgae as indicators for freshwater biomonitoring: Review of published research and future directions |
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10.1016/j.ecolind.2017.05.066 |
Uncategorized |
River Basins |
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No abstract available |
603378 |
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| publications-1152 |
PEER REVIEWED ARTICLE |
2015 |
Lijuan Ren , Erik Jeppesen , Dan He , Jianjun Wang , Lone Liboriussen , Peng Xing , Qinglong L. Wu |
pH Influences the Importance of Niche-Related and Neutral Processes in Lacustrine Bacterioplankton Assembly |
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10.1128/aem.04042-14 |
Uncategorized |
Natural Water Bodies |
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ABSTRACT pH is an important factor that shapes the structure of bacterial communities. However, we have very limited information about the patterns and processes by which overall bacterioplankton communities assemble across wide pH gradients in natural freshwater lakes. Here, we used pyrosequencing to analyze the bacterioplankton communities in 25 discrete freshwater lakes in Denmark with pH levels ranging from 3.8 to 8.8. We found that pH was the key factor impacting lacustrine bacterioplankton community assembly. More acidic lakes imposed stronger environmental filtering, which decreased the richness and evenness of bacterioplankton operational taxonomic units (OTUs) and largely shifted community composition. Although environmental filtering was determined to be the most important determinant of bacterioplankton community assembly, the importance of neutral assembly processes must also be considered, notably in acidic lakes, where the species (OTU) diversity was low. We observed that the strong effect of environmental filtering in more acidic lakes was weakened by the enhanced relative importance of neutral community assembly, and bacterioplankton communities tended to be less phylogenetically clustered in more acidic lakes. In summary, we propose that pH is a major environmental determinant in freshwater lakes, regulating the relative importance and interplay between niche-related and neutral processes and shaping the patterns of freshwater lake bacterioplankton biodiversity. |
603378 |
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| publications-1153 |
PEER REVIEWED ARTICLE |
2016 |
B. Grizzetti , D. Lanzanova , C. Liquete , A. Reynaud , A.C. Cardoso |
Assessing water ecosystem services for water resource management |
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10.1016/j.envsci.2016.04.008 |
Uncategorized |
River Basins |
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No abstract available |
603378 |
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| publications-1154 |
PEER REVIEWED ARTICLE |
2018 |
Thomas A. Davidson , Sebastian Wetterich , Kasper L. Johansen , Bjarne GrÞnnow , Torben Windirsch , Erik Jeppesen , Jari SyvÀranta , Jesper Olsen , |
The history of seabird colonies and the North Water ecosystem: Contributions from palaeoecological and archaeological evidence |
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10.1007/s13280-018-1031-1 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1155 |
PEER REVIEWED ARTICLE |
2018 |
Erik Jeppesen , Martin Appelt , Kirsten Hastrup , Bjarne GrĂžnnow , Anders Mosbech , John P. Smol , Thomas A. Davidson |
Living in an oasis: Rapid transformations, resilience, and resistance in the North Water Area societies and ecosystems |
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10.1007/s13280-018-1034-y |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1156 |
PEER REVIEWED ARTICLE |
2017 |
Fabien Cremona , Sirje Vilbaste , Raoul-Marie Couture , Peeter NÔges , Tiina NÔges |
Is the future of large shallow lakes blue-green? Comparing the response of a catchment-lake model chain to climate predictions |
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10.1007/s10584-016-1894-8 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1157 |
PEER REVIEWED ARTICLE |
2016 |
Agron Idrizaj , Alo Laas , Urmas Anijalg , Peeter NÔges |
Horizontal differences in ecosystem metabolism of a large shallow lake |
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10.1016/j.jhydrol.2016.01.037 |
Uncategorized |
Natural Water Bodies |
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No abstract available |
603378 |
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| publications-1158 |
PEER REVIEWED ARTICLE |
2016 |
Fenjuan Hu , Karsten Bolding , Jorn Bruggeman , Erik Jeppesen , Morgens R. Flindt , Luuk van Gerven , Jan H. Janse , Annette B. G. Janssen , Jan J. Ku |
FABM-PCLake â linking aquatic ecology with hydrodynamics |
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10.5194/gmd-9-2271-2016 |
Uncategorized |
Natural Water Bodies |
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Abstract. This study presents FABM-PCLake, a redesigned structure of the PCLake aquatic ecosystem model, which we implemented in the Framework for Aquatic Biogeochemical Models (FABM). In contrast to the original model, which was designed for temperate, fully mixed freshwater lakes, the new FABM-PCLake represents an integrated aquatic ecosystem model that can be linked with different hydrodynamic models and allows simulations of hydrodynamic and biogeochemical processes for zero-dimensional, one-dimensional as well as three-dimensional environments. FABM-PCLake describes interactions between multiple trophic levels, including piscivorous, zooplanktivorous and benthivorous fish, zooplankton, zoobenthos, three groups of phytoplankton and rooted macrophytes. The model also accounts for oxygen dynamics and nutrient cycling for nitrogen, phosphorus and silicon, both within the pelagic and benthic domains. FABM-PCLake includes a two-way communication between the biogeochemical processes and the physics, where some biogeochemical state variables (e.g., phytoplankton) influence light attenuation and thereby the spatial and temporal distributions of light and heat. At the same time, the physical environment, including water currents, light and temperature influence a wide range of biogeochemical processes. The model enables studies on ecosystem dynamics in physically heterogeneous environments (e.g., stratifying water bodies, and water bodies with horizontal gradients in physical and biogeochemical properties), and through FABM also enables data assimilation and multi-model ensemble simulations. Examples of potential new model applications include climate change impact studies and environmental impact assessment scenarios for temperate, sub-tropical and tropical lakes and reservoirs. |
603378 |
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| publications-1159 |
PEER REVIEWED ARTICLE |
2014 |
Rosemberg F. Menezes , Finn Borchsenius , Jens-Christian Svenning , Thomas A. Davidson , Martin SĂžndergaard , Torben L. Lauridsen , Frank Landkildehu |
Homogenization of fish assemblages in different lake depth strata at local and regional scales |
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10.1111/fwb.12526 |
Uncategorized |
Natural Water Bodies |
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Summary Eutrophication alters the trophic dynamics in lakes and may result in homogenisation of biotic communities. How nutrient enrichment drives patterns of homogenisation of fish species composition at withinâlake (local) and amongâlake (regional) scales is, however, not well studied. To test for homogenisation in fish communities, we analysed number, biomass and individual mean body mass of the different fish species present in 53 Danish lakes with contrasting depths, surface area and eutrophication. A combination of uniâ and multivariate techniques revealed that eutrophication homogenises fish community composition in the littoral zone of both shallow and deep lakes at withinâ and amongâlake scales, a notable contrast being that community composition was not homogenised in the offshore in deep lakes. In addition, fish species richness and diversity converged with progressive eutrophication and mean lake depth in all lake zones. For deep lakes, surface area was positively related to increasing differences in fish species richness and diversity. Increased homogeneity of this key assemblage may have profound implications for ecosystems and their stability (such as decreased resilience to disturbance, reduced biological complexity and increased vulnerability to largeâscale and stochastic environmental events). Thus, to fully understand the impacts of eutrophication on aquatic communities at both local and regional scales, the effects of nutrient enrichment on compositional heterogeneity should be considered. |
603378 |
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| publications-1160 |
PEER REVIEWED ARTICLE |
2015 |
Saara Olsen , Fengyi Chan , Wei Li , Suting Zhao , Martin SĂžndergaard , Erik Jeppesen |
Strong impact of nitrogen loading on submerged macrophytes and algae: a long-term mesocosm experiment in a shallow Chinese lake |
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10.1111/fwb.12585 |
Uncategorized |
Natural Water Bodies |
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Summary Excess loading of phosphorus (P) and nitrogen (N) triggers a shift in the trophic structure of shallow lakes from a clearâwater, macrophyteâdominated state to an algalâdominated turbid state. However, the role of N in the shift is debated, and experimental evidence is, with a few exceptions, based on shortâterm studies (days to a few months). We studied the effect of N loading on macrophytes (dominated by Potamogeton lucens and Cabomba caroliniana), periphyton, filamentous algae and phytoplankton in mesocosms over 10 months (starting in October) in subtropical China (Wuhan). There were three N treatments: controls (CN) without nitrogen addition (mean TN = 1.9 mg Lâ1), low nitrogen (LN) addition (mean TN = 3.5 mg Lâ1) and high nitrogen (HN) addition (mean TN = 5.5 mg Lâ1). Total phosphorus (TP) concentration in the water column remained moderate (0.05â0.07 mg Lâ1) during the experiment in all treatments. Macrophyte abundance declined in the LN and HN treatments in the first 6 months, but not in controls, followed by a partial recovery in the LN treatments. They disappeared completely in the HN treatments the following summer. Periphyton (biofilm on plastic) and phytoplankton biomass remained unaffected during the first 6 months but increased over the summer by two or three times, compared with controls, in low and high nitrogen treatments, respectively. By contrast, the abundance of filamentous algae increased over winter but declined during the summer with no obvious relationship to the N treatments. There was no difference in the TN or nitrate concentrations or soluble protein, soluble sugar and Chlâa content of P. lucens leaves and stems with increasing N load. Macrophyte populations are partially resilient to abrupt increases in N loading at moderate TP concentrations, but, after prolonged exposure, a complete collapse occurs. Our results further indicate that macrophyte loss is exacerbated by shading by filamentous algae during the winter, and by phytoplankton and periphyton in the summer, while there was no indication of direct N toxicity. |
603378 |
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