The dynamics and importance of picoplankton in shallow, dystrophic lake in comparison with surface waters of two deep lakes with contrasting trophic status

1997 ◽  
pp. 87-93 ◽  
Author(s):  
Iwona Jasser
Keyword(s):  
Surface Waters ◽  
Trophic Status ◽  
Deep Lakes ◽  
Dystrophic Lake

scholarly journals The development of the eutrophication process in Dobczyce reservoir

2018 ◽  
Vol 45 ◽  
pp. 00055 ◽  
Author(s):  
Elena Neverova-Dziopak ◽  
Zbigniew Kowalewski
Keyword(s):  
Surface Waters ◽  
Aquatic Ecosystems ◽  
Trophic Status ◽  
Low Cost ◽  
State Assessment ◽  
Dam Reservoir ◽  
Dam Reservoirs ◽  
Abatement Strategies ◽  
Global Threat ◽  
Primary Problem

Eutrophication is currently a global threat to all types of aquatic ecosystems leading to a disturbance of their ecological balance and a deterioration of water quality. This problem is especially true for dam reservoirs, which play a key role in the economy of each country, being an important source of water supply. It is also a primary problem for all types of surface waters in Poland. Effective eutrophication abatement strategies should be based on reliable information about the actual trophic status of waters which in turn should be obtained with fast, accurate and low-cost monitoring. The aim of this paper is to investigate the possibility of the application of aggregated numerical indicators as an effective tool for the assessment of water trophic status and prove it using the example of the trophic state assessment of the Dobczyce dam reservoir. For this purpose, three numerical indicators elaborated by different authors were used.

scholarly journals Annual production to biomass (P/B) ratios of pelagic ciliates in different temperate waters

2016 ◽  
Vol 45 (3) ◽  
Author(s):  
Krzysztof Rychert ◽  
Justyna Kozłowska ◽  
Kamila Krawiec ◽  
Natalia Czychewicz ◽  
Michalina Pączkowska ◽  
...  
Keyword(s):  
Surface Waters ◽  
Seasonal Changes ◽  
Trophic Status ◽  
Allometric Equation ◽  
Annual Production ◽  
Aquatic Environments ◽  
The Baltic Sea ◽  
Bulk Data ◽  
Study Sites ◽  
The Baltic

AbstractIn aquatic environments, ciliates integrate the energy flowing through bacteria, smaller protozoa, and the prevailing fraction of algae and are further grazed upon by metazooplankton. Ciliates are incorporated into budgets and models describing ecosystem functioning. However, data for the parameterization and validation of models remain insufficient. In this study, annual production to biomass (P/B) ratios of pelagic ciliates were estimated in four lakes of different trophic status and at two sites located in the coastal zone of the Baltic Sea. All study sites were located in the temperate zone. The calculations were based on bulk data reflecting seasonal changes in ciliate production, which was estimated using an allometric equation. The annual ciliate P/B ratio for surface waters was 308 ± 81 yr

scholarly journals Patterns in Benthic Biodiversity Link Lake Trophic Status to Structure and Potential Function of Three Large, Deep Lakes

PLoS ONE ◽  
2015 ◽  
Vol 10 (1) ◽  
pp. e0117024 ◽  
Author(s):  
Barbara L. Hayford ◽  
Andrea M. Caires ◽  
Sudeep Chandra ◽  
Scott F. Girdner
Keyword(s):  
Potential Function ◽  
Trophic Status ◽  
Deep Lakes ◽  
Lake Trophic Status

scholarly journals Effect of climate change on thermal-ice regime of shallow lakes compared to deep lakes: Case study of lakes in the temperate zone (Northern Poland)

2018 ◽  
Vol 78 (1) ◽  
Author(s):  
Włodzimierz Marszelewski ◽  
Bożena Pius
Keyword(s):  
Water Temperature ◽  
Surface Waters ◽  
Shallow Lakes ◽  
Thermal Regime ◽  
Shallow Lake ◽  
Deep Lakes ◽  
Deep Lake ◽  
Ice Regime ◽  
Ice Phenomena

The objective of this study is to determine the usefulness of results of hydrological observations (1961-2015) carried out in a deep lake for the assessment changes in the ice-thermal regime of a shallow lake. The paper is based on results of daily values of surface water temperature and ice phenomena in shallow Lake Łebsko and deep Lake Charzykowskie. Similar, statistically significant, positive trends of water temperature were determined in both lakes (0.26°C 10 year-1 in Lake Łebsko and 0.25°C 10 year-1 in Lake Charzykowskie). The fastest increase in mean monthly water temperature in the analysed period (1961-2015) occurred in May (3.37°C in Lake Charzykowskie) and April (2.76°C in Lake Łebsko). The majority of elements of the thermal regime of surface waters in shallow lakes were generally determined to be similar to the same elements in deep lakes, and the effect of climatic changes on the thermal regime of both lakes was found to be similar. Less similarity is observed between elements of the ice regime, particularly in date of decline of the ice cover.  

scholarly journals Trophic state and recreational value of Lake Mikołajskie

2016 ◽  
Vol 16 (3) ◽  
pp. 147-154 ◽  
Author(s):  
Justyna Sieńska ◽  
Julita Dunalska ◽  
Michał Łopata ◽  
Katarzyna Parszuto ◽  
Renata Tandyrak
Keyword(s):  
Total Phosphorus ◽  
Surface Waters ◽  
Trophic State ◽  
Trophic Status ◽  
Water Environment ◽  
Eutrophic Lake ◽  
Lake Area ◽  
Negative Effects ◽  
Secchi Disc ◽  
Status Index

Abstract Lakes along with their surroundings are an attractive landscape component that play an important role in recreation and relaxation. In Poland, the Great Masurian Lakeland, visited by a million tourists every year, is considered to be the most attractive lake area. However, tourist pressure has several negative effects which cause degradation of the water environment. The aim of this study was to determine the trophic state of Lake Mikołajskie which is a hub for sailing and motorboating traffic. Values of the trophic status index were calculated from the content of total phosphorus, chlorophyll a and Secchi disc visibility, according to the data from the Voivodeship Inspectorate for Environmental Protection. In summer, the concentration of total phosphorus was 0.019–0.042 mg dm−3 in 2013 and 0.022–0.055 mg dm−3 in 2014. The concentration of chlorophyll a was in the range of 8.3–45.0 μg dm−3 in 2013 and 8.9–22.0 μg dm−3 in 2014. The maximum visibility of Secchi disc reached 2.0 m (2013) and 1.8 m (2014). Based on the calculated, Lake Mikołajskie can be classified as a eutrophic lake. In order to protect lakes from degradation tourists should be educated about the rational use of surface waters and the surrounding catchment. However, it is not only the massive influx of tourists, but also the activity of residents (dictated by economic reasons) that contribute to the pollution of lakes. Therefore, the development of tourism and the economy of the whole region should be harmonious and balanced so that the natural resources can serve us and future generations for as long as possible.

scholarly journals Vertical mixing as a determinant of trophic status in deep lakes: a case study from two lakes south of the Alps (Lake Garda and Lake Iseo)

2003 ◽  
Vol 62 (1s) ◽  
pp. 33 ◽  
Author(s):  
Nico SALMASO ◽  
Rosario MOSELLO ◽  
Letizia GARIBALDI ◽  
Fabio DECET ◽  
Maria Cristina BRIZZIO ◽  
...  
Keyword(s):  
Trophic Status ◽  
Vertical Mixing ◽  
Deep Lakes ◽  
Lake Garda ◽  
The Alps

Diatom-inferred total phosphorus from dystrophic Lake Arapisto, Finland, in relation to Holocene paleoclimate

2012 ◽  
Vol 78 (2) ◽  
pp. 248-255 ◽  
Author(s):  
Tomi P. Luoto ◽  
Liisa Nevalainen ◽  
Tommi Kauppila ◽  
Mira Tammelin ◽  
Kaarina Sarmaja-Korjonen
Keyword(s):  
Nutrient Dynamics ◽  
Trophic Status ◽  
Lake Productivity ◽  
Holocene Thermal Maximum ◽  
Complex Interactions ◽  
Holocene Paleoclimate ◽  
Dystrophic Lake ◽  
Thermal Maximum ◽  
Fertile Ground

AbstractA sediment core from Lake Arapisto, Finland, was examined for fossil diatom assemblages to reconstruct changes in Holocene nutrient availability. Our aim was to investigate the long-term relationship between lake trophic status and climate by comparing the diatom-based phosphorus reconstruction with paleoclimatic proxies. Our results showed that the cold early Holocene was characterized by elevated nutrient conditions concurrent with newly exposed fertile ground. As the climate rapidly warmed and ice sheet further retreated, the catchment vegetation developed, which resulted in decreased nutrient flux into the lake. The Holocene Thermal Maximum (HTM), between ~ 8000 and 4000 cal yr BP, was characterized by oligotrophic conditions, which may have been caused by low effective precipitation and stable watershed vegetation. After the HTM, the lake became more productive. There was no particular increase in the trophic state that could be connected to more recent human influence. Although lake productivity has been shown to be affected by temperature, our record indicated that the nutrient dynamics were driven by complex interactions between changes in temperature, precipitation, catchment, and in-lake processes. Understanding of long-term nutrient dynamics and the associated processes can help in resolving relationships between lake productivity and climate during past and present climate changes.

Habitat Association of Klebsiella Species

1985 ◽  
Vol 6 (2) ◽  
pp. 52-58 ◽  
Author(s):  
Susan T. Bagley
Keyword(s):  
Drinking Water ◽  
Gastrointestinal Tract ◽  
Surface Waters ◽  
Industrial Effluents ◽  
Opportunistic Pathogen ◽  
Habitat Associations ◽  
Habitat Association ◽  
Klebsiella Species ◽  
Almost All ◽  
Polluted Waters

AbstractThe genus Klebsiella is seemingly ubiquitous in terms of its habitat associations. Klebsiella is a common opportunistic pathogen for humans and other animals, as well as being resident or transient flora (particularly in the gastrointestinal tract). Other habitats include sewage, drinking water, soils, surface waters, industrial effluents, and vegetation. Until recently, almost all these Klebsiella have been identified as one species, ie, K. pneumoniae. However, phenotypic and genotypic studies have shown that “K. pneumoniae” actually consists of at least four species, all with distinct characteristics and habitats. General habitat associations of Klebsiella species are as follows: K. pneumoniae—humans, animals, sewage, and polluted waters and soils; K. oxytoca—frequent association with most habitats; K. terrigena— unpolluted surface waters and soils, drinking water, and vegetation; K. planticola—sewage, polluted surface waters, soils, and vegetation; and K. ozaenae/K. rhinoscleromatis—infrequently detected (primarily with humans).

Identifying Sources of Sulfate Aerosols Reaching Whiteface Mountain, NY

1985 ◽  
Vol 43 ◽  
pp. 98-101
Author(s):  
James S. Webber
Keyword(s):  
Trace Metals ◽  
Acid Deposition ◽  
Surface Waters ◽  
Dry Deposition ◽  
Coal Combustion ◽  
Public Awareness ◽  
Sulfate Aerosols ◽  
Wet And Dry Deposition ◽  
Whiteface Mountain ◽  
Toxic Trace Metals

INTRODUCTION“Acid rain” and “acid deposition” are terms no longer confined to the lexicon of atmospheric scientists and 1imnologists. Public awareness of and concern over this phenomenon, particularly as it affects acid-sensitive regions of North America, have increased dramatically in the last five years. Temperate ecosystems are suffering from decreased pH caused by acid deposition. Human health may be directly affected by respirable sulfates and by the increased solubility of toxic trace metals in acidified waters. Even man's monuments are deteriorating as airborne acids etch metal and stone features.Sulfates account for about two thirds of airborne acids with wet and dry deposition contributing equally to acids reaching surface waters or ground. The industrial Midwest is widely assumed to be the source of most sulfates reaching the acid-sensitive Northeast since S02 emitted as a byproduct of coal combustion in the Midwest dwarfs S02 emitted from all sources in the Northeast.

Sign in / Sign up

Export Citation Format

Share Document