scholarly journals Status of aquatic and riparian biodiversity in artificial lake ecosystems with and without management for recreational fisheries: Implications for conservation

2020 ◽  
Author(s):  
Robert Nikolaus ◽  
Malwina Schafft ◽  
Andreas Maday ◽  
Thomas Klefoth ◽  
Christian Wolter ◽  
...  
Keyword(s):  
Recreational Fisheries ◽  
Artificial Lake ◽  
Lake Ecosystems

scholarly journals Effects of eutrophication on sedimentary organic carbon cycling in five temperate lakes

2019 ◽  
Vol 16 (19) ◽  
pp. 3725-3746 ◽  
Author(s):  
Annika Fiskal ◽  
Longhui Deng ◽  
Anja Michel ◽  
Philip Eickenbusch ◽  
Xingguo Han ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Water Column ◽  
Trophic State ◽  
Microbial Respiration ◽  
Accumulation Rate ◽  
Eutrophic Lake ◽  
Accumulation Rates ◽  
Artificial Lake ◽  
Eutrophic Lakes ◽  
Lake Ecosystems

Abstract. Even though human-induced eutrophication has severely impacted temperate lake ecosystems over the last centuries, the effects on total organic carbon (TOC) burial and mineralization are not well understood. We study these effects based on sedimentary records from the last 180 years in five Swiss lakes that differ in trophic state. We compare changes in TOC content and modeled TOC accumulation rates through time to historical data on algae blooms, water column anoxia, wastewater treatment, artificial lake ventilation, and water column phosphorus (P) concentrations. We furthermore investigate the effects of eutrophication on rates of microbial TOC mineralization and vertical distributions of microbial respiration reactions in sediments. Our results indicate that the history of eutrophication is well recorded in the sedimentary record. Overall, eutrophic lakes have higher TOC burial and accumulation rates, and subsurface peaks in TOC coincide with past periods of elevated P concentrations in lake water. Sediments of eutrophic lakes, moreover, have higher rates of total respiration and higher contributions of methanogenesis to total respiration. However, we found strong overlaps in the distributions of respiration reactions involving different electron acceptors in all lakes regardless of lake trophic state. Moreover, even though water column P concentrations have been reduced by ∼ 50 %–90 % since the period of peak eutrophication in the 1970s, TOC burial and accumulation rates have only decreased significantly, by ∼ 20 % and 25 %, in two of the five lakes. Hereby there is no clear relationship between the magnitude of the P concentration decrease and the change in TOC burial and accumulation rate. Instead, data from one eutrophic lake suggest that artificial ventilation, which has been used to prevent water column anoxia in this lake for 35 years, may help sustain high rates of TOC burial and accumulation in sediments despite water column P concentrations being strongly reduced. Our study provides novel insights into the influence of human activities in lakes and lake watersheds on lake sediments as carbon sinks and habitats for diverse microbial respiration processes.

scholarly journals Status of aquatic and riparian biodiversity in artificial lake ecosystems with and without management for recreational fisheries: implications for conservation

2019 ◽  
Author(s):  
Robert Nikolaus ◽  
Malwina Schafft ◽  
Andreas Maday ◽  
Thomas Klefoth ◽  
Christian Wolter ◽  
...  
Keyword(s):  
Species Richness ◽  
Fisheries Management ◽  
Diversity Index ◽  
List Type ◽  
Recreational Fisheries ◽  
Artificial Lake ◽  
Study Region ◽  
Gravel Pit ◽  
Lake Morphology ◽  
Pit Lakes

AbstractHumanity is facing a biodiversity crisis, with freshwater-associated biodiversity in a particularly dire state. Novel ecosystems created through human use of mineral resources, such as gravel pit lakes, can provide substitute habitats for conservation of freshwater and riparian biodiversity. However, many of these artificial ecosystems may exhibit high recreational use intensity, which may limit their biodiversity potential.The species richness of several taxa (plants, amphibians, dragonflies, damselflies, waterfowl, songbirds) was assessed and a range of taxonomic biodiversity metrics were compared between gravel pit lakes managed for recreational fisheries (N = 16) and unmanaged reference lakes (N = 10), while controlling for non-fishing related environmental variation.The average species richness of all examined taxa was similar among both lake types and no substantial differences in species composition were revealed when examining the pooled species inventory. Similarly, there were no differences among lake types in the presence of rare species and in the Simpson diversity index across all the taxa that were assessed.Variation in species richness among lakes was correlated with woody habitat, lake morphology (surface area and steepness) and land use, but not correlated with the presence of recreational fisheries. Thus, non-fishing related environmental variables had stronger effects on local species presence than recreational-fisheries management or the presence of recreational anglers.Collectively, no evidence was found that anglers and recreational-fisheries management constrain the development of aquatic and riparian biodiversity in gravel pit lakes in the study region. Conservation of species diversity at gravel pit lakes could benefit from an increasing reliance on habitat enhancement activities.

Causes of ecosystem transformations variability in lakes of the european part of Russia and Western Siberia (diatom analysis)

2019 ◽  
pp. 79-82
Author(s):  
Lev V. Razumovsky
Keyword(s):  
Western Siberia ◽  
Graphical Analysis ◽  
European Part ◽  
Analysis Method ◽  
Climatic Region ◽  
Diatom Analysis ◽  
Lake Ecosystems ◽  
Distinctive Features ◽  
European Part Of Russia

On the basis of author's graphical analysis method, the typification of lake ecosystems transformation scenarios depending on the size of lakes was carried out. It was confirmed that the type of transformation depends not only on size of the lake, but also on the landscape and climatic region in which it is located. The distinctive features of lake ecosystems transformation types in the European part of Russia and in Western Siberia were analyzed and compared.

Subfossil insect remains (Chironomidae) and lake-water temperature inference in the Sisimiut–Kangerlussuaq region, southern West Greenland

2000 ◽  
pp. 78-82 ◽  
Author(s):  
Klaus Peter Brodersen ◽  
N. John Anderson
Keyword(s):  
Climate Variability ◽  
Water Temperature ◽  
Lake Water ◽  
Anthropogenic Impact ◽  
Biological Diversity ◽  
Biological Indicators ◽  
Lake Ecosystems ◽  
West Greenland ◽  
Physical Chemical ◽  
Temperature Inference

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Brodersen, K. P., & Anderson, N. J. (2000). Subfossil insect remains (Chironomidae) and lake-water temperature inference in the Sisimiut–Kangerlussuaq region, southern West Greenland. Geology of Greenland Survey Bulletin, 186, 78-82. https://doi.org/10.34194/ggub.v186.5219 _______________ Climate and water temperature have an important influence on the functioning of lake ecosystems. From limnological and palaeolimnological studies of lakes, information on biological diversity and climate variability in time and space can be gleaned from physical, chemical and biological indicators preserved in the lake sediments. The lakes in southern West Greenland are particularly useful for this purpose – they are numerous, diverse and have minimal anthropogenic impact (Anderson & Bennike 1997). Palaeolimnological data are fundamental for understanding the functioning and development of modern lakes and for understanding the causes of climatic change as well as the effect on lake biota.

Seafloor environmental changes during the last 100 years resulting from reconstruction of the artificial lake in Kojima Bay, Okayama Prefecture

2012 ◽  
Vol 73 (3) ◽  
pp. 217-234 ◽  
Author(s):  
Atsuko AMANO ◽  
Guangzhe JIN ◽  
Shin-ichi ONODERA ◽  
Takaharu SATO ◽  
Yuta SHIMIZU ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Artificial Lake ◽  
Okayama Prefecture

scholarly journals Network parameters quantify loss of assemblage structure in human‐impacted lake ecosystems

2019 ◽  
Vol 25 (11) ◽  
pp. 3871-3882 ◽  
Author(s):  
Rong Wang ◽  
John A. Dearing ◽  
C. Patrick Doncaster ◽  
Xiangdong Yang ◽  
Enlou Zhang ◽  
...  
Keyword(s):  
Assemblage Structure ◽  
Lake Ecosystems ◽  
Network Parameters

scholarly journals Monitoring of Phytoplankton in the Artificial Lake: Comparison Study

2021 ◽  
Vol 779 (1) ◽  
pp. 012125
Author(s):  
Z J Kadeem ◽  
F M Hassan ◽  
A H M J Al Obaidy
Keyword(s):  
Comparison Study ◽  
Artificial Lake
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