scholarly journals Installation of an Artificial Vegetating Island in Oligomesotrophic Lake Paro, Korea

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Eun-Young Seo ◽  
Oh-Byung Kwon ◽  
Seung-Ik Choi ◽  
Ji-Ho Kim ◽  
Tae-Seok Ahn
Keyword(s):  
Energy Source ◽  
Lake Water ◽  
Littoral Zone ◽  
Bacterial Attachment ◽  
Iris Ensata ◽  
Total Phosphate ◽  
Water Lake ◽  
Important Region ◽  
Artificial Vegetation ◽  
Inflowing Water

After cut off of inflowing water, Lake Paro, an oligomesotrophic lake lost littoral zone, an important region for the aquatic ecosystem. For the first step of restoration, the artificial vegetation island was installed. The concentration of nutrients in lake water was not sufficient for the growth of macrophyte as total phosphate was ranged from 58 to 83 μg L−1. In order to overcome this problem, the hydrophobic substratum for bacterial attachment was selected as buoyant mat material of the artificial vegetation island. In this medium, total phosphate and total nitrogen were ranged from 190 to 1,060 μg L−1and from 4.9 to 9.1 mg L−1, respectively. These concentrations were high enough for macrophytes growth. After launching 1,800 m2of AVI in Lake Paro, the macrophytes,Iris pseudoacorusandIris ensata, grew well after five years of launching without the addition of fertilizer. Furthermore, fishes were plentiful under the artificial vegetation island, and ducks were observed on the artificial vegetation island. Bacteria using sunlight as energy source and self-designed ecotechnology can be used as an alternative method for the restoration of disturbed littoral zone in oligo-mesotrophic lakes.

Characterization of the light field in laboratory scale enclosures of eutrophic lake water (Lake Loosdrecht, The Netherlands)

Hydrobiologia ◽  
1992 ◽  
Vol 238 (1) ◽  
pp. 99-109 ◽  
Author(s):  
Herman J. Gons ◽  
Jacco Kromkamp ◽  
Machteld Rijkeboer ◽  
Oscar Schofield
Keyword(s):  
The Netherlands ◽  
Lake Water ◽  
Light Field ◽  
Eutrophic Lake ◽  
Laboratory Scale ◽  
Water Lake ◽  
Eutrophic Lake Water

scholarly journals Water Temperature Increasing Caused Mastigias Papua Disappeared in Marine Lake Lenmakana Misool Raja Ampat Regency, West Papua

2020 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Gandi YS Purba
Keyword(s):  
Water Temperature ◽  
Lake Water ◽  
Rainy Season ◽  
Secondary Data ◽  
The West ◽  
Tourist Destinations ◽  
Water Lake ◽  
Marine Lakes ◽  
Lake Temperature ◽  
West Monsoon

Mastigias papua is a jellyfish that is trademark of marine lakes. Ongeim’l Tketau Lake in Palau, Hang Du I Lake in Vietnam, Kakaban Lake in Kalimantan, and Lenmakana Lake in Raja Ampat Papua are exotic tourist destinations because of presence of these biota in the lake. Water temperature is very influential on the life of a jellyfish because of its mutual symbiosis with brown algae zooxanthellae. Mastigias has totally disappeared in several places due to water temperature increasing, including Lenmakana Lake in the West Monsoon 2017/2018 and 2018/2019. The absence of Mastigias in this lake will be explained by recorded logger data installed in the lake and at sea. Secondary data from NOAA and BMKG will be used to explain the condition of absence of jellyfish. Water lake temperature data showed an increase to 2.5oC when the Mastigias disappeared. Temperature increasing occur due to seasonal cycle patterns of lake water temperatures and weather cycles which change in time, the dry season occurs faster and the rainy season occurs slower. Conversely, in the West Monsoon 2019/2020, Mastigias still found in the lake. The rainy season which is 20 days faster than normal condition helps reduce the heat in West Monsoon.

Surrounding pressure controlled by water table alters CO2 and CH4 fluxes in the littoral zone of a brackish-water lake

2011 ◽  
Vol 47 (3) ◽  
pp. 160-166 ◽  
Author(s):  
Akinori Yamamoto ◽  
Mitsuru Hirota ◽  
Shizuo Suzuki ◽  
Pengcheng Zhang ◽  
Shigeru Mariko
Keyword(s):  
Water Table ◽  
Brackish Water ◽  
Littoral Zone ◽  
Water Lake ◽  
Pressure Controlled ◽  
Brackish Water Lake

Simultaneous Determination of Triclocarban and Triclosan in Environmental Water by Using SPE Combined with HPLC-ESI-MS

2012 ◽  
Vol 610-613 ◽  
pp. 268-271 ◽  
Author(s):  
Chun Liang Yi ◽  
Wei Lin Guo ◽  
Xi Kui Wang
Keyword(s):  
Simultaneous Determination ◽  
Lake Water ◽  
Tap Water ◽  
Environmental Water ◽  
Optimum Conditions ◽  
Operational Parameters ◽  
Esi Ms ◽  
Water Lake ◽  
Sensitive Method

A sensitive method for the simultaneous determination of TCC and TCS in water, which involves enrichment with SPE and detection with HPLC-ESI-MS, was developed. The influence of the operational parameters,such as eluan, the acidity of the sample, were investigated and optimized. Under the optimum conditions, the limits of detection were 1.0 ng L-1and 2.5 ng L-1 for TCC and TCS, respectively. The method was successfully applied to the analysis of triclocarban and triclosan in real environmental water samples, including river water, lake water and tap-water. The spiked recoveries of TCC and TCS in these samples were achieved in the range of 89.5%–97.5%.

Effects of tidal fluctuations on CO2 and CH4 fluxes in the littoral zone of a brackish-water lake

Limnology ◽  
2009 ◽  
Vol 10 (3) ◽  
pp. 229-237 ◽  
Author(s):  
Akinori Yamamoto ◽  
Mitsuru Hirota ◽  
Shizuo Suzuki ◽  
Yusuke Oe ◽  
Pengcheng Zhang ◽  
...  
Keyword(s):  
Brackish Water ◽  
Littoral Zone ◽  
Water Lake ◽  
Brackish Water Lake

MnII-Doped ZnS Quantum Dots Modified with Tiopronin for Mercury(II) Detection

2015 ◽  
Vol 68 (2) ◽  
pp. 315 ◽  
Author(s):  
Xin Liu ◽  
Xun-Shou Zhan ◽  
Fang-Ying Wu ◽  
Li-Hua Ma
Keyword(s):  
Quantum Dots ◽  
Fluorescence Intensity ◽  
Lake Water ◽  
Rapid Detection ◽  
Limit Of Detection ◽  
Tap Water ◽  
Low Cost ◽  
Real Samples ◽  
Water Lake ◽  
Mercuric Ions

The simple, low-cost, and rapid detection of aqueous mercuric ions remains a challenge for environmental and biological monitoring and protection. We demonstrate herein a new analytical method to detect Hg2+ based on MnII-doped ZnS quantum dots modified with tiopronin. At pH 7.2, Hg2+ causes the fluorescence intensity of quantum dots modified with tiopronin to decrease linearly proportionally with the concentration of Hg2+. This method is non-responsive to general metal ions, surfactants, and some biomacromolecules even though their concentrations were greater than that of Hg2+. Therefore, a sensitive and selective fluorescence assay for Hg2+ with a low limit of detection (8.9 × 10–9 mol L–1) has been developed and its successful application in real samples such as tap water, lake water, and human serum are also discussed in detail.

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