MODELKEY. Models for assessing and forecasting the impact of environmental key pollutants on freshwater and marine ecosystems and biodiversity (5 pp)

2005 ◽  
Vol 12 (5) ◽  
pp. 252-256 ◽  
Author(s):  
Werner Brack
Keyword(s):  
Marine Ecosystems ◽  
The Impact

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

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.

scholarly journals Marine Reserves as Conservation and Management Tools: Implications for Coastal Resource Use

2021 ◽  
Author(s):  
◽  
Tyler D. Eddy
Keyword(s):  
New Zealand ◽  
Resource Use ◽  
Fishery Management ◽  
Marine Reserves ◽  
Experimental Treatment ◽  
Marine Ecosystems ◽  
Modern World ◽  
Ecological Knowledge ◽  
Coastal Resource ◽  
The Impact

<p>Exploited marine ecosystems are a common feature of the modern world and area closures (marine reserves; MRs) have been suggested from both conservation and fishery management perspectives as a technique to rebuild over-fished populations. MRs provide an interesting experimental treatment where humans are excluded from resource harvesting. In the absence of exploitation, marine species have been observed to return to levels of abundance similar to historic accounts of virgin biomass (biomass under an exploitation level of 0). This thesis investigates the impact and potential of MRs in both New Zealand and Chile for achieving conservation and fishery management goals through the use of underwater observation, historic information, fishers’ ecological knowledge (FEK), bioeconomic fishery modeling and ecosystem modeling ... Overall, this thesis has investigated the effects of human coastal resource use in New Zealand and Chile from social, economic and ecological perspectives through the use of different techniques by synthesising both quantitative and qualitative information sources. MRs are a valuable tool from conservation, management and scientific perspectives as they can rebuild overexploited stocks and return the ecosystem to a more historic state. MRs also provide an understanding of the interaction between coastal resource use and ecosystem-wide changes, which is a crucial element for ecosystem-based management. This thesis has illustrated the importance of comparing present stock biomasses to historic baselines to understand the impacts of exploitation of coastal resources on marine ecosystems.</p>

Ocean Recovery

2019 ◽  
Author(s):  
Ray Hilborn ◽  
Ulrike Hilborn
Keyword(s):  
Fisheries Management ◽  
Marine Ecosystems ◽  
Popular Media ◽  
Fish Stock ◽  
General Audience ◽  
Fish Stocks ◽  
The Status ◽  
Comprehensive Survey ◽  
Graduate Seminars ◽  
The Impact

Over the last 2 decades, the scientific and popular media have been bombarded by gloom-and-doom stories on the future of fisheries, the status of fish stocks, and the impact of fishing on marine ecosystems. Dozens of certification and labeling schemes have emerged to advise consumers on what seafood is sustainable. In recent years, an opposing narrative has emerged emphasizing the success of fisheries management in many places, the increasing abundance of fish stocks in those places, and the prescription for sustainable fisheries. However, there has been no comprehensive survey of what really constitutes sustainability in fisheries, fish stock status, success and failures of management, and consideration of the impacts of fishing on marine ecosystems. This book will explore very different perspectives on sustainability and bring together the data from a large number of studies to show where fish stocks are increasing, where they are declining, the consequences of alternative fisheries management regimes, and what is known about a range of fisheries issues such as the impacts of trawling on marine ecosystems. Aimed principally at a general audience that is already interested in fisheries but seeks both a deeper understanding of what is known about specific issues and an impartial presentation of all of the data rather than selected examples used to justify a particular perspective or agenda. It will also appeal to the scientific community eager to know more about marine fisheries and fishing data, and serve as the basis for graduate seminars on the sustainability of natural resources.

The impact of mixotrophy on planktonic marine ecosystems

2000 ◽  
Vol 125 (2-3) ◽  
pp. 203-230 ◽  
Author(s):  
H.L. Stickney ◽  
R.R. Hood ◽  
D.K. Stoecker
Keyword(s):  
Marine Ecosystems ◽  
The Impact

The impact of glacier runoff on the biodegradability and biochemical composition of terrigenous dissolved organic matter in near-shore marine ecosystems

2010 ◽  
Vol 121 (1-4) ◽  
pp. 112-122 ◽  
Author(s):  
Jason B. Fellman ◽  
Robert G.M. Spencer ◽  
Peter J. Hernes ◽  
Rick T. Edwards ◽  
David V. D'Amore ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Biochemical Composition ◽  
Marine Ecosystems ◽  
Glacier Runoff ◽  
Near Shore ◽  
The Impact

scholarly journals Offshore transport of floodwaters following extreme storms impacts sponge health and associated microbial communities

2020 ◽  
Author(s):  
Amanda N. Shore ◽  
Jordan A. Sims ◽  
Michael Grimes ◽  
Lauren I. Howe-Kerr ◽  
Lauren Stadler ◽  
...  
Keyword(s):  
Climate Change ◽  
Marine Ecosystems ◽  
Rrna Gene ◽  
Storm Events ◽  
Human Pathogens ◽  
Population Declines ◽  
Severe Storms ◽  
Terrestrial Runoff ◽  
The Impact ◽  
Offshore Reef

AbstractTerrestrial runoff can negatively impact marine ecosystems through stressors including excess nutrients, freshwater, sediments, and contaminants. Severe storms, which are increasing with global climate change, generate massive inputs of runoff over short timescales (hours to days); such runoff impacted offshore reefs in the northwest Gulf of Mexico (NW GoM) following severe storms in 2016 and 2017. Several weeks after coastal flooding from these events, NW GoM reef corals, sponges, and other benthic invertebrates experienced mortality (2016 only) and/or sub-lethal stress (both years). To assess the impact of storm-derived runoff on reef filter feeders, we characterized the microbiomes of two sponges, Agelas clathrodes and Xestospongia muta, during periods of lethal stress, sub-lethal stress, and no stress over a three-year period (2016-2018). Increased anaerobes during lethal stress indicate hypoxic conditions were associated with the 2016 mortality event. Additionally, we found evidence of wastewater contamination (based on 16S rRNA gene libraries and quantitative PCR) in sponges 185 km offshore following storms (2016 and 2017), but not during the non-flooding year (2018). We show that flooding after severe storms reaches offshore reef ecosystems and may impact offshore benthic organisms, highlighting the need for molecular and microbial time series from near- and offshore reef ecosystems, and for the continued mitigation of stormwater runoff and climate change impacts.ImportanceStressors associated with terrestrial runoff have contributed to substantial population declines in nearshore marine ecosystems worldwide over the last three decades. It has been assumed that offshore marine ecosystems (>100 km from land) are largely unaffected by terrestrial runoff. Our findings, however, suggest that flooding events can significantly impact offshore marine organisms, based on the detection of shifted microbiomes and human pathogens in offshore sponges after extreme storm events across two separate years, and lack of detection in a non-flooding year.

Sign in / Sign up

Export Citation Format

Share Document