Potential Effects of Climate Changes on the Marine Ecosystem Stability: Assessment of the Water Quality

2013 ◽  
pp. 9-50 ◽  
Keyword(s):  
Water Quality ◽  
Climate Changes ◽  
Marine Ecosystem ◽  
Ecosystem Stability ◽  
Stability Assessment

Potential Effects of Climate Changes on the Marine Ecosystem Stability

2013 ◽  
pp. 1-42
Author(s):  
Jorge Marcovecchio ◽  
Natalia Buzzi ◽  
Matías Tartara ◽  
Carla Spetter ◽  
Pia Simonetti
Keyword(s):  
Climate Changes ◽  
Marine Ecosystem ◽  
Ecosystem Stability

A practical method for setting coastal water quality targets: Harmonization of land-based discharge limits with marine ecosystem thresholds

Marine Policy ◽  
2019 ◽  
Vol 108 ◽  
pp. 103641 ◽  
Author(s):  
Marko Tosic ◽  
Flávio Martins ◽  
Serguei Lonin ◽  
Alfredo Izquierdo ◽  
Juan Darío Restrepo
Keyword(s):  
Water Quality ◽  
Coastal Water ◽  
Marine Ecosystem ◽  
Practical Method ◽  
Coastal Water Quality

Colonization dynamics of periphytic ciliate communities across taxonomic levels using an artificial substrate for monitoring water quality in coastal waters

2010 ◽  
Vol 91 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Henglong Xu ◽  
Joon-Ki Choi ◽  
Gi-Sik Min ◽  
Qinglin Zhu
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Marine Ecosystem ◽  
Taxonomic Diversity ◽  
Artificial Substrate ◽  
Taxonomic Distinctness ◽  
System 2 ◽  
Colonization Dynamics ◽  
Colonization Patterns ◽  
Lower Variability

Taxonomic diversity and temporal patterns in abundance of periphytic ciliate communities across taxonomic levels were studied to monitor water quality in Korean coastal waters during April 2007. Specifically we compared two methods based on an artificial substrate (glass slide): the polyurethane foam enveloped slide (PFES) and the conventional slide (CS) systems. The results demonstrated that: (1) the colonization patterns of the ciliate communities at all taxonomic levels showed a lower variability in the PFES system than those of the CS system; (2) The taxonomic diversity (Δ) and taxonomic distinctness (Δ*) were significantly higher in the PFES system than those in the CS system; and (3) all four taxonomic diversity/distinctness indices represented lower variability in the PFES system than those of the CS samples. These findings suggest that the PFES system is more effective than the CS system for measuring the colonization patterns and taxonomic distinctness parameters that are increasingly used as potential indicators of water quality. This conclusion supports our previous suggestion that the PFES system is a better tool than the CS system for monitoring water quality in the marine ecosystem, using periphytic ciliates.

Tools to forecast climate change effects on lakes's water column

2020 ◽  
Author(s):  
José Rodolfo Scarati Martins ◽  
Lais Ferrer Amorim ◽  
Fabio Ferreira Nogueira ◽  
Fabio Paiva da Silva
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Column ◽  
Climate Changes ◽  
Driving Forces ◽  
Environmental Research ◽  
Mixing Condition ◽  
Mixing Regime ◽  
Lakes And Reservoirs

<p>Lakes and reservoirs are environments with many important uses in social activities, such as hydropower generation, water supply, landscape element, irrigation and flood containment. An ecosystem with so many environmental services needs to have its water quality well preserved, and besides that, inland waters have a key role in climate change studies, because of their faster response to variability in external forces.</p><p>Water circulation in a reservoir is the result of a combination of morphometry and energetic driving forces. A lake’s hydrodynamic characteristics vary with morphometric, meteorological and hydrological conditions. The heat balance involves exchanges at the surface, which are actively mixed and energised by the transfers occurring at the air-water interface, and also the exchanges in the water-soil interface near the banks and bottom, which depend on currents and internal waves; while in the main water column, the heat transfer is influenced by light penetration.</p><p>In the context of climate changes and water scarcity worldwide, the development of tools to better understand, maintain and improve water quality in lakes and reservoirs becomes an essential ally to environmental research and limnology. This research aims to demonstrate the lake mixing regime by a different approach, testing two different methods to forecast the climate change influence on a lakes’ mixing regime, using data from climate models.</p><p>The first tool is a thermal limit curve proposed by the authors which can forecast water column thermal limits for stability or mixing condition in a lake, based on wind speed, radiation and water profile temperature data. The second applied tool is a quasi-3D mathematical model, well known and reputed in the simulation field.</p><p>The results obtained for different experimental lakes in temperate and tropical zones showed that both methods have a good performance in representing lakes hydrodynamics accurately. The curve allows a faster response and minor need for data input, on the other hand, the quasi-3D models are capable to produce more detailed results. Possibly in the lakes’ management, it would be more indicated the use of those two methods together, using the curve to analyse faster the period's trend and be able to delimitate the exact period which needs more detailed studies.</p><p>The climate change simulations conducted for two experimental lakes considering different scenarios of climate changes showed the driving forces' strong influence on the lake's mixing regime. The number of mixing events is an interesting proxy to analyse this influence. It was greater in the pessimistic scenarios but still less than in the current situation. This means longer periods of stratification, which can cause dissolved oxygen depletion in the deeper layers.</p><p>The pessimistic scenarios have mixing events with greater amplitude, which results from a powerful stratification in previous periods. Mixing events with greater amplitudes create higher vertical velocities, resuspending more organic load and dropping dissolved oxygen levels along the water column, impairing the water quality.</p>

Responses of surface water quality to future land cover and climate changes in the Neka River basin, Northern Iran

2021 ◽  
Vol 193 (7) ◽  
Author(s):  
Sharif Joorabian Shooshtari ◽  
Kamran Shayesteh ◽  
Mehdi Gholamalifard ◽  
Mahmood Azari ◽  
Juan Ignacio López-Moreno
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Land Cover ◽  
River Basin ◽  
Climate Changes ◽  
Surface Water Quality ◽  
Northern Iran

scholarly journals KARAKTERISTIK UMUM DIATOM DAN APLIKASINYA PADA BIDANG GEOSAINS

OSEANA ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 70-87
Author(s):  
Septriono Hari Nugroho
Keyword(s):  
Water Quality ◽  
Cell Wall ◽  
Environmental Impact ◽  
Environmental Conditions ◽  
Climate Changes ◽  
Aquatic Environments ◽  
Diatom Cell ◽  
Wide Scope ◽  
Diatom Analysis ◽  
Fossil Diatoms

AN OVERVIEW OF DIATOM AND ITS APPLICATIONS ON THE GEOSCIENCE AREA. Diatoms have been being studied in many countries. Diatoms provide a valuable and well-understood means on biomonitoring – one of which is focused on the base of the aquatic foodweb and highly representative of water quality. They are found in most aquatic environments and the sys tematic and taxonomic investigations of modern and fossil diatoms have been supported by numerous stud ies of distributional ecology. Diatom systematics, taxonomy and ecology indeed offer a wide scope of applications - from water quality to environmental monitoring and biostratigraphy as well as on geoscience area. The application of diatom analysis in determining whether drowning was the cause of death has proven to be a valuable tool in forensic science. Furthermore, diatoms can provide a record of environmental conditions because their relationship to water quality and aquatic habitat has been already known, and the diatom cell wall, which is silicified to form a frustule, is well-preserved, easily detectable and occurs in high numbers in sediment and water. However, this should not be limited to simply make an inventory of data: thoughtful ecology and paleo-ecology will assist in predicting the environmental impact of pollution and climate changes.

scholarly journals Climate change in Nepal – shall we wait until bitter consequences?

2007 ◽  
Vol 8 ◽  
pp. 38-45 ◽  
Author(s):  
Sunit N Lohani
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Climate Changes ◽  
Additional Stress ◽  
Green House Gas ◽  
Himalayan Glaciers ◽  
Cold Stream ◽  
Agriculture And Environment ◽  
Climate Events ◽  
Growing Population

Although Nepal does not emit much of green house gas as compared to developed and industrialized economies, it has been facing several consequences of climate changes. Such changes are raising temperatures in the country’s sky too. Exploitation of natural resources associated with growing population has led to increasing pollution, declining water quality, land degradation and other environmental problems. Within such circumstances climate change represents an additional stress which has multiple consequences such as extreme climate events including flood, draughts, heat wave, cold stream, melting of Himalayan glaciers and so forth. Due to such events agricultural productivity is suffering from severe losses and attainment of food security is under tremendous threats. The signs of such changes already felt may become more prominent over next couple of decades. If this time is not utilized properly it may be too late to avoid many foreseen bitter consequences. The Journal of AGRICULTURE AND ENVIRONMENT Vol. 8, 2007, pp. 38-45

scholarly journals Biodiversity of macrozoobenthos some running waters of southern Moravia

2010 ◽  
Vol 58 (2) ◽  
pp. 303-310
Author(s):  
Ivo Sukop
Keyword(s):  
Water Quality ◽  
Czech Republic ◽  
New Zealand ◽  
Dreissena Polymorpha ◽  
Climate Changes ◽  
Potamopyrgus Antipodarum ◽  
Running Waters ◽  
Southern Moravia

The present work gives the results of the research of macrozoobenthos some running waters drai­na­ge areas of the Dyje River (southern Moravia – Czech Republic). Altogether, 762 taxa of macrozoobenthos were determined from the running waters of southern Moravia. Porifera (3), Hydrozoa (3), Turbellaria (8), Nematoda (14), Nematomorpha (1), Oligochaeta (60), Hirudinea (18), Bryozoa (5), Mollusca (44), Isopoda (2), Amphipoda (4), Decapoda (2), Hydracarina (17), Ephemeroptera (65), Plecoptera (55), Odonata (26), Heteroptera (3), Plannipennia (2), Trichoptera (128), Coleoptera (59), Diptera (243). Some taxa of macrozoobenthos are extinct unfortunately in running waters of Southern Moravia at present time. Another ones appear newly, for example snail Potamopyrgus antipodarum from New Zealand or Dreissena polymorpha from Pontic region. The data presented in this paper may serve as a basis for future monitoring of water quality and zoobenthos composition in connection with presumption of climate changes.

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