Differences in swimming pattern between life cycle stages of the toxic dinoflagellate Alexandrium fundyense

Harmful Algae ◽  
2013 ◽  
Vol 21-22 ◽  
pp. 36-43 ◽  
Author(s):  
Agneta Persson ◽  
Barry C. Smith ◽  
Gary H. Wikfors ◽  
Jennifer H. Alix
Keyword(s):  
Life Cycle ◽  
Toxic Dinoflagellate ◽  
Alexandrium Fundyense ◽  
Life Cycle Stages ◽  
Swimming Pattern

Distribution and Abundance of the Toxic Dinoflagellate Gonyaulax excavata in the Bay of Fundy

1988 ◽  
Vol 45 (11) ◽  
pp. 1968-1975 ◽  
Author(s):  
Jennifer L. Martin ◽  
Alan W. White
Keyword(s):  
Life Cycle ◽  
Large Population ◽  
Distribution Patterns ◽  
Bay Of Fundy ◽  
Toxic Dinoflagellate ◽  
The South ◽  
Fish Kills ◽  
South Central ◽  
Life Cycle Stages ◽  
Motile Cells

Water samples were collected for five consecutive summers (1980–84) in the Bay of Fundy at the surface and at 5 m to examine the distribution patterns of the motile stages of the toxic dinoflagellate Gonyaulax excavata, which has caused shellfish toxicity in this area for years, as well as occasional fish kills. In 1980 and 1981, 128 and 122 stations were sampled, respectively, and 84 and 41% of the samples contained G. excavata cells. Further sampling in 1982–84 was reduced to areas where most cells were observed in previous years. During this period, G. excavata was observed in 91–100% of the locations sampled. Despite variations in abundance of G. excavata cells from year to year, the overall distribution patterns were similar. The highest concentrations of cells occurred in the south-central and southwestern portions of the Bay in the area bounded by the Quoddy Region and Saint John, New Brunswick, and Digby, Nova Scotia. The distribution of various life cycle stages (plahozygotes, vegetative duplets, and sexually fusing cells) was similar to that of individual motile cells, suggesting that the annual blooms in this region behave as one large population. Few or no G. excavata cells were found at the head of the Bay or at the seaward approaches. Results suggest the prevailing circulation in the Bay and the presence of tidal fronts are dominant factors in retaining G. excavata and its life cycle stages in the south-central and southwestern portion of the Bay and that this accounts for its perennial occurrence in this area.

In situ life-cycle stages of Alexandrium fundyense during bloom development in Northport Harbor (New York, USA)

Harmful Algae ◽  
2012 ◽  
Vol 16 ◽  
pp. 20-26 ◽  
Author(s):  
Sílvia Anglès ◽  
Esther Garcés ◽  
Theresa K. Hattenrath-Lehmann ◽  
Christopher J. Gobler
Keyword(s):  
New York ◽  
Life Cycle ◽  
Alexandrium Fundyense ◽  
Life Cycle Stages

FINANCING THE DEVELOPMENT OF MUNICIPAL ENTITIES AT DIFFERENT LIFE CYCLE STAGES: PUBLIC AND PRIVATE RESOURCES

2019 ◽  
Vol 0 (3) ◽  
pp. 53-60 ◽  
Author(s):  
T.Yu. Altufyeva ◽  
◽  
P.A. Ivanov ◽  
G.R. Sakhapova ◽  
◽  
...  
Keyword(s):  
Life Cycle ◽  
Public And Private ◽  
Life Cycle Stages

scholarly journals COMPETITIVE EFFECTS OF THE ALIEN INVASIVE CENTAUREA SOLSTITIALISL. ON TWO CHILEAN BACCHARIS SPECIES AT DIFFERENT LIFE-CYCLE STAGES

2009 ◽  
Vol 66 (1) ◽  
Author(s):  
Susana Gómez-González ◽  
Lohengrin A Cavieres ◽  
Patricio Torres ◽  
Cristian Torres-Díaz
Keyword(s):  
Life Cycle ◽  
Competitive Effects ◽  
Life Cycle Stages

scholarly journals Mitigating the Energy Consumption and the Carbon Emission in the Building Structures by Optimization of the Construction Processes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3287
Author(s):  
Alireza Tabrizikahou ◽  
Piotr Nowotarski
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Structural Optimization ◽  
Carbon Emissions ◽  
Carbon Emission ◽  
Construction Materials ◽  
High Energy ◽  
Building Structures ◽  
Life Cycle Stages ◽  
Reduction Of Energy Consumption

For decades, among other industries, the construction sector has accounted for high energy consumption and emissions. As the energy crisis and climate change have become a growing concern, mitigating energy usage is a significant issue. The operational and end of life phases are all included in the building life cycle stages. Although the operation stage accounts for more energy consumption with higher carbon emissions, the embodied stage occurs in a time-intensive manner. In this paper, an attempt has been made to review the existing methods, aiming to lower the consumption of energy and carbon emission in the construction buildings through optimizing the construction processes, especially with the lean construction approach. First, the energy consumption and emissions for primary construction materials and processes are introduced. It is followed by a review of the structural optimization and lean techniques that seek to improve the construction processes. Then, the influence of these methods on the reduction of energy consumption is discussed. Based on these methods, a general algorithm is proposed with the purpose of improving the construction processes’ performance. It includes structural optimization and lean and life cycle assessments, which are expected to influence the possible reduction of energy consumption and carbon emissions during the execution of construction works.

scholarly journals Mitochondrial Processes during Early Development of Dictyostelium discoideum: From Bioenergetic to Proteomic Studies

Genes ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 638
Author(s):  
Monika Mazur ◽  
Daria Wojciechowska ◽  
Ewa Sitkiewicz ◽  
Agata Malinowska ◽  
Bianka Świderska ◽  
...  
Keyword(s):  
Life Cycle ◽  
Developmental Stages ◽  
Coupling Efficiency ◽  
Slime Mold ◽  
Intact Cells ◽  
Life Cycle Stages ◽  
Early Developmental Stages ◽  
Proteomic Study ◽  
And Function ◽  
Early Developmental

The slime mold Dictyostelium discoideum’s life cycle includes different unicellular and multicellular stages that provide a convenient model for research concerning intracellular and intercellular mechanisms influencing mitochondria’s structure and function. We aim to determine the differences between the mitochondria isolated from the slime mold regarding its early developmental stages induced by starvation, namely the unicellular (U), aggregation (A) and streams (S) stages, at the bioenergetic and proteome levels. We measured the oxygen consumption of intact cells using the Clarke electrode and observed a distinct decrease in mitochondrial coupling capacity for stage S cells and a decrease in mitochondrial coupling efficiency for stage A and S cells. We also found changes in spare respiratory capacity. We performed a wide comparative proteomic study. During the transition from the unicellular stage to the multicellular stage, important proteomic differences occurred in stages A and S relating to the proteins of the main mitochondrial functional groups, showing characteristic tendencies that could be associated with their ongoing adaptation to starvation following cell reprogramming during the switch to gluconeogenesis. We suggest that the main mitochondrial processes are downregulated during the early developmental stages, although this needs to be verified by extending analogous studies to the next slime mold life cycle stages.

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