Testing and development of different metrics and indexes describing submerged aquatic vegetation for the assessment of the ecological status of semi-enclosed coastal water bodies in the NE Baltic Sea

2014 ◽  
Vol 63 (4) ◽  
pp. 262 ◽  
Author(s):  
K Torn ◽  
G Martin ◽  
L Rostin
Keyword(s):  
Baltic Sea ◽  
Coastal Water ◽  
Submerged Aquatic Vegetation ◽  
Aquatic Vegetation ◽  
Ecological Status ◽  
Water Bodies

scholarly journals COMPARATIVE ANALYSIS OF FATTY ACIDS COMPOSITION OF COASTAL-WATER TYPHA LATIFOLIA, SUBMERGED CERATOPHYLLUM DEMERSUM AND WATER FORM VERONICA ANAGALLIS-AQUATICA FROM WATER BODIES OF BAIKALIAN REGION

2019 ◽  
pp. 119-128
Author(s):  
Kuz'ma Anatol'yevich Kirichenko ◽  
Tamara Pavlovna Pobezhimova ◽  
Sergey Grigor'yevich Kazanovsky ◽  
Natal'ya Aleksandrovna Sokolova ◽  
Elizaveta Sergeevna Kondrateva ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Coastal Water ◽  
Ecological Status ◽  
Typha Latifolia ◽  
Water Bodies ◽  
Ceratophyllum Demersum ◽  
Gas Liquid Chromatography

The fatty acid comparative essay of high aquatic plants: Typha latifolia L., Ceratophyllum demersum L. and Veronica anagallis-aquatica L. from water bodies of Baikalian region was carried out. For the first time this biochemical parameter of water form V. anagallis-aquatica was compared with that of coastal-water T. latifolia and submerged C. demersum. The fifteen individual molecules of fatty acids with a chain length from 12 to 22 carbon atoms have been identified by the method of gas liquid chromatography – mass spectrometry. The fatty acid composition of investigated species was different. Among the fatty acids saturated and unsaturated molecules was found, the most distributed fatty acids was saturated palmitic (С16:0), steric (С18:0) and unsaturated linoleic (С18:2 w6), α-linolenic (С18:3 w3). In total, the C16 and C18 acids in studied species accounted for 98%. Differences in the composition of fatty acids of the studied species are discussed from the standpoint of the characteristics of fatty acid metabolism depending on the habitat of plants and are considered as one of the mechanisms of their adaptation to late vegetation. Studies of the fatty acid composition of aquatic organisms contribute to the overall strategy of plant adaptation to changing environmental conditions and are important for the ecological and biochemical monitoring of the ecological status of water bodies.

scholarly journals Satellite Estimation of Chlorophyll-a Using Moderate Resolution Imaging Spectroradiometer (MODIS) Sensor in Shallow Coastal Water Bodies: Validation and Improvement

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1621
Author(s):  
Mohd Manzar Abbas ◽  
Assefa M. Melesse ◽  
Leonard J. Scinto ◽  
Jennifer S. Rehage
Keyword(s):  
Remote Sensing ◽  
Chesapeake Bay ◽  
Chlorophyll A ◽  
Coastal Water ◽  
Ocean Color ◽  
Ecological Status ◽  
Deep Ocean ◽  
Water Bodies ◽  
Band Ratio ◽  
Chl A

The size and distribution of Phytoplankton populations are indicators of the ecological status of a water body. The chlorophyll-a (Chl-a) concentration is estimated as a proxy for the distribution of phytoplankton biomass. Remote sensing is the only practical method for the synoptic assessment of Chl-a at large spatial and temporal scales. Long-term records of ocean color data from the MODIS Aqua Sensor have proven inadequate to assess Chl-a due to the lack of a robust ocean color algorithm. Chl-a estimation in shallow and coastal water bodies has been a challenge and existing operational algorithms are only suitable for deeper water bodies. In this study, the Ocean Color 3M (OC3M) derived Chl-a concentrations were compared with observed data to assess the performance of the OC3M algorithm. Subsequently, a regression analysis between in situ Chl-a and remote sensing reflectance was performed to obtain a green-red band algorithm for coastal (case 2) water. The OC3M algorithm yielded an accurate estimate of Chl-a for deep ocean (case 1) water (RMSE = 0.007, r2 = 0.518, p < 0.001), but failed to perform well in the coastal (case 2) water of Chesapeake Bay (RMSE = 23.217, r2 = 0.009, p = 0.356). The algorithm developed in this study predicted Chl-a more accurately in Chesapeake Bay (RMSE = 4.924, r2 = 0.444, p < 0.001) than the OC3M algorithm. The study indicates a maximum band ratio formulation using green and red bands could improve the satellite estimation of Chl-a in coastal waters.

scholarly journals Hydroecological features of water bodies within Zhukiv island in Kyiv

2020 ◽  
pp. 112-118
Author(s):  
V. I. Vyshnevskyi ◽  
S. A. Shevchuk ◽  
O. M. Kozytskyi
Keyword(s):  
Water Exchange ◽  
Aquatic Vegetation ◽  
Negative Impact ◽  
Ecological Status ◽  
Water Levels ◽  
Water Bodies ◽  
Water Runoff ◽  
Nature Protection ◽  
River Bank ◽  
The Impact

According to field research, cartographic works and satellite images, the main hydroecological features of water bodies on Zhukov Island in Kyiv have been studied. Information on the history of the impact of economic activity on this area is given. The first object affected the water bodies, located on the island, particularly for the Konyk river arm, was a railway tunnel, which was under construction in the late 1930s and early 1940s. Another factor was the construction of several roads. As the result of this construction the former Konyk river arm actually turned into the lake. Significant changes in this area were observed in the mid-1970s after the constriction of the Kanivske Reservoir. The increase in the water level in low water conditions by about 2.5 m caused an increase in the size of existing water bodies and the emergence of new ones. The description of the largest lakes in the studied area is given. For today they are a complex system of lakes in this area, hydraulically connected with the Dnipro River. At the same time, water exchange in the lakes and between the lakes and the river is insignificant. First of all, this is due to the low capacity of the existing hydraulic structures and clogging of ways to them. In fact, there is the only one hydraulic structure on the river bank through which water can reach the lakes. In addition, low water runoff of the Dnipro River in recent years also causes a negative impact on this ecosystem. Recently, intraday fluctuations of water discharges at the Kyiv HPP have decreased, and respectively the fluctuations of water levels in the Dnipro River near the studied area also decreased. This negatively affected the ecological condition of the lakes, which are intensively overgrown. In addition, wastewater inflow into one of the largest local lakes, namely Konyk, has a negative impact. The indicators of bottom sediments in this lake are given, which testify to its pollution by heavy metals. The typical species of aquatic and air-aquatic vegetation inherent to the lakes on Zhukov Island are characterized. The recommendation, which can improve water exchange in the lakes and their ecological status, are given. It was considered that the nature protection activity in this area can be improved in case of adding the created here landscape reserve to the National Nature Park “Holosiivskyi”.    

scholarly journals Novel approach for large‐scale monitoring of submerged aquatic vegetation – a nationwide example from Sweden

2021 ◽  
Author(s):  
Silvia Huber ◽  
Lars B. Hansen ◽  
Lisbeth T. Nielsen ◽  
Mikkel L. Rasmussen ◽  
Jonas Sølvsteen ◽  
...  
Keyword(s):  
Large Scale ◽  
Submerged Aquatic Vegetation ◽  
Aquatic Vegetation ◽  
Novel Approach

scholarly journals Assessment of the Impact of Small Hydropower Plants on the Ecological Status Indicators of Water Bodies: A Case Study in Lithuania

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 433
Author(s):  
Laima Česonienė ◽  
Midona Dapkienė ◽  
Petras Punys
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Suspended Solids ◽  
Ecological Status ◽  
Fish Abundance ◽  
Water Bodies ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Physico Chemical ◽  
The Impact

Hydropower plants produce renewable and sustainable energy but affect the river’s physico-chemical characteristics and change the abundance and composition of the aquatic organisms. The impact of large HPPs on the ecological conditions of surface water bodies have been extensively studied, but less attention has been paid to environmental impact studies of small hydropower plants (SHPs). The impact of hydropeaking on both the river flow regime and ecosystems has been well-studied for peaking mode plants, mainly medium to large-sized ones. However, for small hydroelectric power plants, and especially for those in lowland rivers, the available information on water quality, benthic macroinvertebrates communities and fish abundance, and biomass is not sufficient. Ten small hydropower plants were selected, and the ecological status of water bodies was assessed in different parts of Lithuania. The studies were performed at the riverbed upstream from the SHPs, where the hydrological regime has not changed, and downstream from the SHPs. It was found that the small hydropower plants do not affect the physico-chemical values of the water quality indicators. This study demonstrated that the total number of benthic macroinvertebrates taxa (TS) is influenced by the concentration of nitrogen and suspended solids, the water flow, the river area, and the current speed; the number of EPT (Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)) taxa is influenced by the concentration of nitrogen and suspended solids. The studied indicators do not have a significant impact on biomass. The SHPs affect the fish abundance and biomass. The Lithuanian fish index (LFI) is influenced by the average depth and area of the river. Some SHPs operating in lowland areas may yield somewhat significant hydrograph ramping but more detailed investigation is needed to support the significance of this impact on the biological indices.

scholarly journals The Baltic Health Index (BHI): Assessing the social–ecological status of the Baltic Sea

2021 ◽  
Author(s):  
Thorsten Blenckner ◽  
Christian Möllmann ◽  
Julia Stewart Lowndes ◽  
Jennifer R. Griffiths ◽  
Eleanore Campbell ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Ecological Status ◽  
Health Index ◽  
The Baltic Sea ◽  
Social Ecological ◽  
The Social ◽  
The Baltic
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