Relationship between PCB uptake and nutrient limitation in three algal species

2021 ◽  
Author(s):  
Sanhita Datta
Keyword(s):  
Nutrient Limitation ◽  
Algal Species

scholarly journals Effects of Nutrient Limitation on the Synthesis of N-Rich Phytoplankton Toxins: A Meta-Analysis

Toxins ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 221 ◽  
Author(s):  
Karen Brandenburg ◽  
Laura Siebers ◽  
Joost Keuskamp ◽  
Thomas G. Jephcott ◽  
Dedmer B. Van de Waal
Keyword(s):  
Nutrient Limitation ◽  
Harmful Algal Blooms ◽  
Algal Blooms ◽  
Meta Analysis ◽  
Algal Species ◽  
Paralytic Shellfish Poisoning ◽  
Shellfish Poisoning ◽  
N Limitation ◽  
P Limitation ◽  
Toxin Content

Eutrophication has played a major role in the worldwide increase of harmful algal blooms (HABs). Higher input of key nutrients, such as nitrogen (N) and phosphorus (P), can stimulate the growth of harmful algal species in freshwater, estuarine, and coastal marine ecosystems. Some HAB-forming taxa, particularly several cyanobacteria and dinoflagellate species, are harmful through the production of N-rich toxins that have detrimental effects on the environment and human health. Here, we test how changes in nutrient availability affect N-rich toxin synthesis in cyanobacteria and dinoflagellates using a meta-analysis approach. Overall, N-rich toxin content showed an increase with P limitation, while it tended to decrease with N limitation, but we also observed substantial variation in responses both within and across genera and toxin groups. For instance, in response to N limitation, microcystin content varied from a 297% decrease up to a 273% increase, and paralytic shellfish poisoning (PSP) toxin content varied from a 204% decrease to an 82% increase. Cylindrospermopsin, produced by N2-fixing cyanobacteria, showed no clear direction in response to nutrient limitation, and cellular contents of this compound may thus vary independently of nutrient fluctuations. Our results confirm earlier reported stoichiometric regulation of N-rich phytoplankton toxins, showing increased toxin content with an increase in cellular N:P ratios, and vice versa. Thus, changes in N-rich toxin content largely follow the changes in relative cellular N content. Consequently, although nutrient limitation may limit bloom biomass and thereby bloom toxicity, our results warn that P limitation can cause accumulation of cellular toxins and thus lead to unexpected increases in bloom toxicity.

STRUKTUR KOMUNITAS MAKRO ALGA DI PESISIR PULAU KECAMATAN BULANG

SIMBIOSA ◽  
2014 ◽  
Vol 3 (2) ◽  
Author(s):  
Notowinarto Notowinarto ◽  
Ramses Ramses ◽  
Mulhairi Mulhairi
Keyword(s):  
Community Structure ◽  
Diversity Index ◽  
Algal Species ◽  
Algal Communities ◽  
Marine Life ◽  
Ph Values ◽  
Abundance Patterns ◽  
Coastal Marine ◽  
Temperature Parameter ◽  
Important Value Index

Bulang districts Batam Islands of  Riau province (Riau Islands), its consists of many islands with as well as having the potential diversity of coastal marine life in particular kinds of macro algae or seaweed. Conducted research aimed to determine the structure of macro- algal communities in the intertidal zone islands. The results of the identification of algal species found 16 species are: the Order of Chlorophyceae as 6 spesies; Order Phaeophyceae as 2 spesies; and Order Rhodophyceae as 8 spesies. The community structure at the five stations showed the highest values were found in the island of dominance Cicir (D ' = 0.79) , uniformity index values on Tengah Island (E ' = 0.99) , while the island Balak had the highest diversity index (H ' = 0.88) , with the abundance patterns of population structure on the island is pretty good Central . Results of correlation analysis of regression between IVI types of algae with the conditions of environmental quality suggests that there is a significance (Fhit ˃ F table and the value of r = > 90 %) between IVI algae Halimeda sp and Cryptarachne polyglandulosa at each station with a temperature parameter surface (⁰C) , depth temperature (⁰C) and pH values. Keywords : Algae, Community Structure, Important Value Index.

MARINE MICRO AND MACRO ALGAL SPECIES AS BIOSORBENTS FOR HEAVY METALS

2007 ◽  
Vol 6 (3) ◽  
pp. 237-251 ◽  
Author(s):  
Loredana Brinza ◽  
Matthew J. Dring ◽  
Maria Gavrilescu
Keyword(s):  
Heavy Metals ◽  
Algal Species

EFFECT OF SOME ALGAL SPECIES ON THE SNAIL INTERMEDIATE HOSTS OF SCHISTOSOMIASIS IN EGYPT II. GROWTH, INFECTION AND MORTALITY RATES

2005 ◽  
Vol 6 (1) ◽  
pp. 93-110
Author(s):  
Faiza El-Assal ◽  
Sanaa Shanab ◽  
Amin Abou-El-Hassan ◽  
Kadria Mahmoud
Keyword(s):  
Algal Species ◽  
Mortality Rates ◽  
Intermediate Hosts

EFFECT OF DIFFERENT CHEMICAL COMPOUNDS ON THE GROWTH OF TWO SOIL ALGAL SPECIES NOSTOC HUMIFUSUM AND OSCILLATORIA EARLEI.

2004 ◽  
Vol 5 (1) ◽  
pp. 119-137
Author(s):  
Rawheya Salah El Din ◽  
Ahmed El-Gamel ◽  
Fatma El Habashi ◽  
Wessam El Nemr
Keyword(s):  
Algal Species ◽  
Chemical Compounds

The Use of Sodium Carbonate Peroxyhydrate to Treat Off-Flavor in Commercial Catfish Ponds

1992 ◽  
Vol 25 (2) ◽  
pp. 315-321 ◽  
Author(s):  
J. F. Martin
Keyword(s):  
Water Column ◽  
Sodium Carbonate ◽  
Algal Species ◽  
The Other ◽  
Average Depth ◽  
Oscillatoria Chalybea ◽  
Catfish Ponds ◽  
Pond Ecology ◽  
Sodium Carbonate Peroxyhydrate

Sodium carbonate peroxyhydrate (SCP) was applied to seven commercial catfish ponds in Mississippi to study the effects of treatment on fish flavor and pond ecology. The seven ponds were treated on alternate days in the morning with two doses of SCP at 55 kg hectare−1 (average depth 1-1.6 m). In three of the ponds, a potent 2-methylisoborneol (MIB) producing planktonic Oscillatoria chalybea-like species that was initially present was absent from the water column after treatment. In addition, the fish from two of these ponds were judged on-flavor 7 to 10 days after treatment. The off-flavor chemicals in three other ponds were diminished when measured seven days after treatment and fish were harvested from two of these ponds 10-14 days after treatment. The fish from the other two ponds were harvested 21 days after treatment. In the sixth pond, the predominant algal species was a 2-methylisoborneol producing O. chalybea-like species at 380 cells ml−1 and the treatment was ineffective. The treatment was most successful when off-flavor was less than two months duration and where application of the chemical was accomplished uniformly over the entire pond surface.

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