scholarly journals Macroalgae fouling community as quality element for the evaluation of the ecological status in Vela Luka Bay, Croatia

2012 ◽  
Vol 81 (3) ◽  
pp. 159-165
Author(s):  
Gorana Jelic Mrcelic ◽  
Merica Sliskovic ◽  
Boris Antolic
Keyword(s):  
Negative Impact ◽  
Ecological Status ◽  
Ecological State ◽  
Fouling Community ◽  
Erroneous Conclusion ◽  
Qualitative And Quantitative ◽  
Low Diversity ◽  
One Year ◽  
Taxonomic Groups ◽  
Qualitative And Quantitative Study

One year qualitative and quantitative study of communities of three major taxonomic groups has been carried out at test panles placed in the upper infarlittoral zone of coastal area of Vela Luka Bay, Croatia. A list of 44 taxa was recorded. <em>Chaetomorpha </em>sp., <em>Ulva </em>sp., <em>Fosliella farinosa</em>, <em>Sphacelaria cirrosa</em>, <em>Polysiphonia scopulorum </em>were the most frequent dominant taxa. Among 27 algal taxa with noticeable presence only three were classified as ESG (Ecological State Groups) I. Low diversity and species richness together with massive presence of the green algae (as <em>Ulva </em>sp.) and negligible presence of ESG I taxa, may lead to erroneous conclusion that Vela Luka Bay is eutrophicated area. Low values of biomass and <em>R/P </em>(Rhodophyceae by Phaeophyceae ratio) Index together with dominance of Phaeophyta also support conclusion that there is no negative impact of nutrient enrichment on macrophyta fouling community in Vela Luka Bay.

scholarly journals Qualitative and Quantitative study of Epipelic algae in Tigris River within Baghdad City, Iraq

2014 ◽  
Vol 11 (3) ◽  
pp. 1074-1082
Author(s):  
Baghdad Science Journal
Keyword(s):  
Benthic Algae ◽  
Lotic Ecosystems ◽  
Qualitative And Quantitative ◽  
Tigris River ◽  
Spatial And Temporal Distributions ◽  
Number Species ◽  
Study Sites ◽  
One Year ◽  
Qualitative And Quantitative Study

The present study conducted to study epipelic algae in the Tigris River within Baghdad city for one year from September 2011 to August 2012 due to the importance role of benthic algae in lotic ecosystems. Five sites have been chosen along the river. A total of 154 species of epipelic algae was recorded belongs to 45 genera, where Bacillariophyceae (Diatoms) was the dominant groups followed by Cyanophyceae and Chlorophyceae. The numbers of common types in three sites were 47 species. Bacillariophyceae accounted 88.31% of the total number of epipelic algae, followed by Cyanophyceae 7.14 % and Chlorophyceae 4.55%. A 85 species (29 genera) recorded in site 1, 103 species (34 genera) in site2, 112 species (35 genera) in site3, 96 species (32 genera) in site4, and 85 species (29 genera) in site5. Spatial and temporal distributions of epipelic algae were noticed in this study. The higher total number of epipelic algae (91504.01cell cm-2) was recorded at site 5 in spring 2012, while the lower was (37017.98cell cm-2) in summer 2012 at site1. Some genera have recorded higher number species during the study period; these genera were Nitzschia, Navicula, Cymbella, Gomphonema, Synedra, Achnanthes, Oscillatoria, and Lyngbya. The study revealed that Bacillariophyceae were more prominent within all study sites and followed by Cyanophyceae, while a few numbers of Chlorophyceae was appeared.

scholarly journals Qualitative and quantitative study of phytoplankton of River Wainganga near Markandadeo, Dist. Gadchiroli (M.S.)

2020 ◽  
Author(s):  
Rajendra Tijare
Keyword(s):  
Organic Matter ◽  
Aquatic Ecosystems ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Investigation Period ◽  
Environmental Requirements ◽  
Seasonal Analysis ◽  
Taxonomic Groups ◽  
Qualitative And Quantitative Study ◽  
Indian Rivers

Phytoplankton is a heterogeneous group of micro-organism and plays a major role in the food chain of aquatic ecosystems by biosynthesis of organic matter and thus they act as primary producers of food. The phytoplankton of many Indian rivers consists of diverse assemblages of major taxonomic groups. Many of these forms have different physiological and environmental requirements. During the investigation period of two years phytoplankton were collected randomly from three different sites i.e. S1, S2 and S3 of river Wainganga for qualitative and quantitative analysis. During the course of study total 31 species of phytoplankton were recorded belonging to five different classes. Seasonal analysis of plankton from this lotic water body showing wide diversity of phytoplankton. Chlorophyceae or green algae comprise an important phytoplanktonic group both in terms of abundance (15 species) and frequently occurrence and Bacillariophyceae (Diatoms) was represented by seven species. Myxophyceae or blue-green comprises of six species and Euglenophyceae were represented by two species i.e. Euglena sp. and Phacus sp. while Dinophyceae was represented by only one species of genus Ceratium.

Qualitative and Quantitative Study of Verbal Behavior Style in Interviews with Patient's Companion in Family Medicine: Understanding and Measuring

2017 ◽  
Vol 1 (1) ◽  
Author(s):  
Turabian Jose Luis ◽  
Minier-Rodriguez Luis Enoc ◽  
Moreno-Ruiz Sandra ◽  
Rodriguez-Almonte Francis Eliant ◽  
Cucho-Jove Raul ◽  
...  
Keyword(s):  
Family Medicine ◽  
Verbal Behavior ◽  
Quantitative Study ◽  
Qualitative And Quantitative ◽  
Qualitative And Quantitative Study

A Qualitative and Quantitative Study of the Innervation of the Human Non Pregnant Uterus

2016 ◽  
Vol 18 (2) ◽  
pp. 140-148 ◽  
Author(s):  
Silvia Tommaso ◽  
Carlo Cavallotti ◽  
Antonio Malvasi ◽  
Daniele Vergara ◽  
Antonio Rizzello ◽  
...  
Keyword(s):  
Quantitative Study ◽  
Pregnant Uterus ◽  
Qualitative And Quantitative ◽  
Qualitative And Quantitative Study

scholarly journals First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 338
Author(s):  
Claire Michelet ◽  
Daniela Zeppilli ◽  
Cédric Hubas ◽  
Elisa Baldrighi ◽  
Philippe Cuny ◽  
...  
Keyword(s):  
South America ◽  
French Guiana ◽  
Ecological Status ◽  
Organic Enrichment ◽  
Strongly Correlated ◽  
Trophic Groups ◽  
Ecological State ◽  
Spatio Temporal ◽  
De Man ◽  
Main City

Bioindicators assess the mangroves ecological state according to the types of pressures but they differ with the ecosystem’s specificities. We investigated benthic meiofauna diversity and structure within the low human-impacted mangroves in French Guiana (South America) in response to sediment variables with various distances to the main city. Contaminant’s concentrations differed among the stations, but they remained below toxicity guidelines. Meiofauna structure (Foraminifera, Kinorhyncha, Nematoda) however varied accordingly. Nematode’s identification brought details on the sediment’s quality. The opportunistic genus Paraethmolaimus (Jensen, 1994) strongly correlated to the higher concentrations of Hg, Pb. Anoxic sediments were marked by organic enrichment in pesticides, PCB, and mangrove litter products and dominance of two tolerant genus, Terschellingia (de Man, 1888) and Spirinia (Gerlach, 1963). In each of these two stations, we found many Desmodora individuals (de Man, 1889) with the presence of epibionts highlighting the nematodes decreased fitness and defenses. Oxic sediments without contaminants were distinguished by the sensitive genera Pseudocella (Filipjev, 1927) and a higher diversity of trophic groups. Our results suggested a nematodes sensitivity to low contaminants concentrations. Further investigations at different spatio-temporal scales and levels of deterioration, would be necessary to use of this group as bioindicator of the mangroves’ ecological status.

Mating in the harvestman Leiobunum vittatum (Arachnida: Opiliones): from premating struggles to solicitous tactile engagement

Behaviour ◽  
2014 ◽  
Vol 151 (12-13) ◽  
pp. 1663-1686 ◽  
Author(s):  
Kasey D. Fowler-Finn ◽  
Emilia Triana ◽  
Owen G. Miller
Keyword(s):  
Morphological Traits ◽  
Nuptial Gift ◽  
Multiple Sources ◽  
Male Size ◽  
Mechanical Advantage ◽  
Qualitative And Quantitative ◽  
Mutual Mate Choice ◽  
Males And Females ◽  
Qualitative And Quantitative Study ◽  
Multiple Stages

When mating interactions are influenced by multiple sources of selection, they may involve multiple stages of mate assessment. At each stage, a different set of morphological and behavioural traits may be important in determining the outcome of the interaction. Here, we test the potential for multiple sources of selection to shape mating interactions in Leiobunum vittatum harvestmen, commonly known as ‘daddy longlegs’. We provide a qualitative and quantitative study of mating interactions, and investigate the influence of multiple morphological traits on each of several distinct stages of their mating interactions. Mating interactions start with a struggle between males and females during which the male attempts to secure the females in a mating embrace. Success at this stage depends on the length of the male’s clasping pedipalps: those with shorter pedipalps (and thus greater mechanical advantage) were more successful. Male size relative to the female determines how quickly males achieve this embrace. Mating interactions then proceed to tactile exchanges between males and females, indicating the potential for mutual mate choice and/or peri- and post-copulatory selection. We found no morphological predictors of the timing of these later stages of the mating interactions, and suggest that the exchange of a nuptial gift is important for the dynamics of these stages. Overall, our results highlight L. vittatum as a potentially highly informative group for studying how traits involved in mating are shaped by the interaction of selection across multiple stages in mating interactions.

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