scholarly journals A First Approach to Assess the Impact of Bottom Trawling Over Vulnerable Marine Ecosystems on the High Seas of the Southwest Atlantic

10.5772/59268 ◽  
2015 ◽  
Author(s):  
J. Portela ◽  
J. Cristobo ◽  
P. Ríos ◽  
J. Acosta ◽  
S. Parra ◽  
...  
Keyword(s):  
Marine Ecosystems ◽  
Southwest Atlantic ◽  
Bottom Trawling ◽  
The Impact ◽  
High Seas

scholarly journals Management Strategies to Limit the Impact of Bottom Trawling on VMEs in the High Seas of the SW Atlantic

10.5772/34610 ◽  
2012 ◽  
Author(s):  
Julio Portela ◽  
Juan Acosta ◽  
Javier Cristobo ◽  
Araceli Muoz ◽  
Santiago Parra ◽  
...  
Keyword(s):  
Management Strategies ◽  
Bottom Trawling ◽  
Sw Atlantic ◽  
The Impact ◽  
High Seas

scholarly journals Mapping the impact of alien species on marine ecosystems: the Mediterranean Sea case study

2016 ◽  
Vol 22 (6) ◽  
pp. 694-707 ◽  
Author(s):  
Stelios Katsanevakis ◽  
Fernando Tempera ◽  
Heliana Teixeira
Keyword(s):  
Alien Species ◽  
Mediterranean Sea ◽  
Marine Ecosystems ◽  
The Mediterranean ◽  
The Impact

Addressing the effects of bottom trawling on benthic processes using experimental and field studies in the Baltic Sea

2020 ◽  
Author(s):  
Claudia Morys ◽  
Martin Jakobsson ◽  
Mattias Sköld ◽  
Pere Masqué ◽  
Volker Brüchert ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Field Experiments ◽  
Biogeochemical Cycling ◽  
Field Studies ◽  
The Baltic Sea ◽  
Bottom Trawling ◽  
Flux Measurements ◽  
The Baltic ◽  
Benthic Ecosystems ◽  
The Impact

<p>Bottom trawling is one of the most important anthropogenic disturbances affecting marine ecosystems and there has been increased attention to its impacts on seabed habitats as well as the structure and functioning of benthic ecosystems. The impact of bottom trawling is well-known with regard to benthic organisms. However, we still have a poor understanding of its effects on bentho-pelagic coupling and biogeochemical cycling in the sediment. In the Baltic Sea, the study area of the present investigation, there is a particular lack of data.<br>Here, we present new results from field experiments to quantify changes in sediment properties, macrofauna and biogeochemical cycling after the passage of a benthic dredge. To put the results in a broader context, a field survey was conducted in six areas of different commercial trawling intensities in the Bornholm Basin. Acoustic geophysical mapping, isotope profiling, functional categorization of macrofauna and sediment-water nutrient and oxygen flux measurements were used to evaluate the physical disturbance of the seabed. Preliminary results suggest a range of ecological, biogeochemical and physical impacts of trawling in the Baltic Sea, with implications for benthic ecosystem functioning.</p>

Modern Methods of Rapid Assessment of the Ecological Status of Marine Areas In Situ with Vertical Sounding

2020 ◽  
Vol 8 (1) ◽  
pp. 11-19
Author(s):  
Natal'ya Lyamina ◽  
M. Kosovskaya ◽  
A. Lyamin ◽  
S. Kosovskaya
Keyword(s):  
Marine Environment ◽  
Light Emission ◽  
Abiotic Factors ◽  
Rapid Assessment ◽  
Ecological Status ◽  
Marine Ecosystems ◽  
Ecological Condition ◽  
Anthropogenic Factors ◽  
Formation Mechanisms ◽  
The Impact

The study of marine ecosystems’ spatial structuring, interaction of these ecosystems’ various components and investigation of their heterogeneity formation mechanisms are among the most important problems of modern hydro ecology. Bioluminescence as manifestation of an organism vital activity in the form of electromagnetic radiation in the visible spectrum is the most important ecological and optical factor of the marine environment. The impact of biotic, abiotic and anthropogenic factors can significantly change the characteristics of aquatic organisms’ light emission. It is of immediate interest to assess the marine ecosystems’ current state on bioluminescence field’s parameters variability, as it can serve as a sensitive indicator for the degree of plankton organisms’ resistance to the effect of pollutants, and as an express indicator for marine environment’s local and regional pollution. Has been demonstrated the possibility of using the modern probing hydro-biological complex «Salpa-MA» with computer processing of the measured information for the rapid assessment of coastal waters’ ecological condition. This complex allows in a short time in marine environment to obtain synchronous integrated assessments of biotic and abiotic factors, and using laboratory processing of obtained data to reveal marine organisms’ functional linkages with environmental factors, and identify the features of these organisms development.

scholarly journals Comparison of Short-Term Toxicity of 14 Common Phycotoxins (Alone and in Combination) To The Survival of Brine Shrimp Artemia Salina

2021 ◽  
Author(s):  
Yu Ting Zhang ◽  
Shanshan SONG ◽  
Bin ZHANG ◽  
Yang ZHANG ◽  
Miao TIAN ◽  
...  
Keyword(s):  
Ecological Risk ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Algal Species ◽  
Natural Populations ◽  
Marine Ecosystems ◽  
Artemia Salina ◽  
Marine Organisms ◽  
Short Term ◽  
The Impact

Abstract Toxic harmful algal blooms (HABs) can cause deleterious effects in marine organisms, threatening the stability of marine ecosystems. It is well known that different strains, natural populations and growth conditions of the same toxic algal species may lead to different amount of phycotoxin production and the ensuing toxicity. To fully assess the ecological risk of toxic HABs, it is of great importance to investigate the toxic effects of phycotoxins in marine organisms. In this study, the short-term toxicity of 14 common phycotoxins (alone and in combination) in the marine zooplankton Artemia salina was investigated. On the basis of 48 h LC50, the order of toxicity in A. salina was AZA3 (with a LC50 of 0.0203 µg/ml)＞AZA2 (0.0273 µg/ml) ＞PTX2 (0.0396 µg/ml)＞DTX1 (0.0819 µg/ml)＞AZA1 (0.106 µg/ml)＞ SPX1 (0.144 µg/ml)＞YTX (0.172 µg/ml)＞dcSTX (0.668 µg/ml)＞OA (0.728 µg/ml)＞STX (1.042 µg/ml)＞GYM (1.069 µg/ml)＞PbTx3 (1.239 µg/ml)＞hYTX (1.799 µg/ml)＞PbTx2 (2.415 µg/ml). For the binary exposure, additive effects of OA and DTX1, DTX1 and hYTX; antagonistic effects of OA and PTX2, OA and STX; and synergetic effects of DTX1 and STX, DTX1 and YTX, DTX1 and PTX2, PTX2 and hYTX on the mortality of A. salina were observed. These results provide valuable toxicological data for assessing the impact of phycotoxins on marine planktonic species and highlight the potential ecological risk of toxic HABs in marine ecosystems.

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