scholarly journals Epipelic algal distribution in Ismailia Canal and the possible use of diatoms as bioindicators and a biomonitoring tool

2014 ◽  
Vol 40 (4) ◽  
pp. 385-393 ◽  
Author(s):  
Mohamad Saad Abd El-Karim
Keyword(s):  
Biomonitoring Tool ◽  
Algal Distribution

scholarly journals Beach environmental DNA fills gaps in photographic biomonitoring to track spatiotemporal community turnover across 82 phyla

2019 ◽  
Author(s):  
Rachel S. Meyer ◽  
Teia M. Schweizer ◽  
Wai-Yin Kwan ◽  
Emily Curd ◽  
Adam Wall ◽  
...  
Keyword(s):  
Beta Diversity ◽  
Environmental Dna ◽  
Marine Conservation ◽  
Biological Interactions ◽  
Global Biodiversity Information Facility ◽  
Conservation Area ◽  
Community Turnover ◽  
Biomonitoring Tool ◽  
Science Community ◽  
Diverse Community

Abstract:Environmental DNA (eDNA) metabarcoding is emerging as a biomonitoring tool available to the citizen science community that promises to augment or replace photographic observation. However, eDNA results and photographic observations have rarely been compared to document their individual or combined power. Here, we use eDNA multilocus metabarcoding, a method deployed by the CALeDNA Program, to inventory and evaluate biodiversity variation along the Pillar Point headland near Half Moon Bay, California. We describe variation in presence of 13,000 taxa spanning 82 phyla, analyze spatiotemporal patterns of beta diversity, and identify metacommunities. Inventory and measures of turnover across space and time from eDNA analysis are compared to the same measures from Global Biodiversity Information Facility (GBIF) data, which contain information largely contributed by iNaturalist photographic observations. We find eDNA depicts local signals with high seasonal turnover, especially in prokaryotes. We find a diverse community dense with pathogens and parasites in the embayment, and a State Marine Conservation Area (SMCA) with lower species richness than the rest of the beach peninsula, but with beta diversity signals showing resemblance to adjacent unprotected tidepools. The SMCA differs in observation density, with higher density of protozoans, and animals in Ascidiacea, Echinoidea, and Polycladida. Local contributions to beta diversity are elevated in a section of East-facing beach. GBIF observations are mostly from outside the SMCA, limiting some spatial comparisons. However, our findings suggest eDNA samples can link the SMCA sites to sites with better GBIF inventory, which may be useful for imputing species from one site given observations from another. Results additionally support >3800 largely novel biological interactions. This research, and accompanying interactive website support eDNA as a gap-filling tool to measure biodiversity that is available to community and citizen scientists.

Algal endosymbiosis in brown hydra: host/symbiont specificity

1986 ◽  
Vol 86 (1) ◽  
pp. 273-286 ◽  
Author(s):  
M. Rahat ◽  
V. Reich
Keyword(s):  
Ecological Factors ◽  
Vacuolar Membrane ◽  
Physiological Strain ◽  
Free Living ◽  
Daughter Cells ◽  
Green Hydra ◽  
Endodermal Cells ◽  
Hydra Viridis ◽  
Algal Distribution

Host/symbiont specificity has been investigated in non-symbiotic and aposymbiotic brown and green hydra infected with various free-living and symbiotic species and strains of Chlorella and Chlorococcum. Morphology and ultrastructure of the symbioses obtained have been compared. Aposymbiotic Swiss Hydra viridis and Japanese H. magnipapillata served as controls. In two strains of H. attenuata stable hereditary symbioses were obtained with Chlorococcum isolated from H. magnipapillata. In one strain of H. vulgaris, in H. oligactis and in aposymbiotic H. viridis chlorococci persisted for more than a week. Eight species of free-living Chlorococcum, 10 symbiotic and 10 free-living strains of Chlorella disappeared from the brown hydra within 1–2 days. In H. magnipapillata there was a graded distribution of chlorococci along the polyps. In hypostomal cells there were greater than 30 algae/cell while in endodermal cells of the mid-section or peduncle less than 10 algae/cell were found. In H. attenuata the algal distribution was irregular, there were up to five chlorocci/cell, and up to 20 cells/hydra hosted algae. In the dark most cells of Chlorococcum disappeared from H. magnipapillata and aposymbiotic hydra were obtained. Chlorococcum is thus an obligate phototroph, and host-dependent heterotrophy is not required for the preservation of a symbiosis. The few chlorococci that survived in the dark seem to belong to a less-demanding physiological strain. In variance with known Chlorella/H. viridis endosymbioses the chlorococci in H. magnipapillata and H. attenuata were tightly enveloped in the vacuolar membrane of the hosting cells with no visible perialgal space. Chlorococcum reproduced in these vacuoles and up to eight daughter cells were found within the same vacuole. We suggest that the graded or scant distribution of chlorococci in the various brown hydra, their inability to live in H. viridis and the inability of the various chlorellae to live in brown hydra are the result of differences in nutrients available to the algae in the respective hosting cells. We conclude that host/symbiont specificity and the various forms of interrelations we show in green and brown hydra with chlorococci and chlorellae are based on nutritional-ecological factors. These interrelations demonstrate successive stages in the evolution of stable obligatoric symbioses from chance encounters of preadapted potential cosymbionts.

A review on the use of lichens as a biomonitoring tool for environmental radioactivity

2022 ◽  
Vol 243 ◽  
pp. 106797
Author(s):  
J. Anderson ◽  
N. Lévesque ◽  
F. Caron ◽  
P. Beckett ◽  
G.A. Spiers
Keyword(s):  
Environmental Radioactivity ◽  
Biomonitoring Tool

scholarly journals DNA repair as a human biomonitoring tool: Comet assay approaches

2019 ◽  
Vol 781 ◽  
pp. 71-87 ◽  
Author(s):  
Amaya Azqueta ◽  
Sabine A.S. Langie ◽  
Elisa Boutet-Robinet ◽  
Susan Duthie ◽  
Carina Ladeira ◽  
...  
Keyword(s):  
Dna Repair ◽  
Comet Assay ◽  
Human Biomonitoring ◽  
Biomonitoring Tool

Vertical profile of algal distribution during aeration prior to intake tower for safe drinking water

2007 ◽  
Vol 55 (1-2) ◽  
pp. 321-327 ◽  
Author(s):  
H.K. Kim ◽  
J.M. Kim ◽  
Y.J. Lee ◽  
B.I. Kim ◽  
B.C. Lee ◽  
...  
Keyword(s):  
Drinking Water ◽  
Green Algae ◽  
Vertical Profile ◽  
Water Bloom ◽  
Safe Drinking Water ◽  
Blue Green Algae ◽  
Natural Toxins ◽  
Dam Site ◽  
The Vertical Distribution ◽  
Algal Distribution

Blue-green algae or cyanobacteria comprise a diverse group of organisms, all of which generate potent natural toxins, as well as characteristic odours. In particular, blue-green algae, such as Microcystis and Anabaena, are often detected abundantly in surface water used as a drinking water resource. In order to confirm our ability to provide safe drinking water even during a water bloom, we have conducted an investigation into the vertical distribution of algae during aeration prior to entry into the intake tower at a dam site. Our analysis of the vertical algal distribution during aeration indicated that aeration occurring at the intake tower exerts a significant influence on the safety of the drinking water. It was determined that the discontinuation of aeration and an increase in the depth at which water intake is conducted, constitutes a viable strategy for the maintenance of toxin- and odour-free drinking water, particularly during water bloom events.

Predicting Trace Metal Exposure in Aquatic Ecosystems: Evaluating DGT as a Biomonitoring Tool

2018 ◽  
Vol 12 (1) ◽  
pp. 19-31 ◽  
Author(s):  
Carlos Eduardo Eismann ◽  
Amauri Antonio Menegário ◽  
Hendryk Gemeiner ◽  
Paul Nicholas Williams
Keyword(s):  
Trace Metal ◽  
Aquatic Ecosystems ◽  
Metal Exposure ◽  
Biomonitoring Tool

ALGAL DISTRIBUTION IN A SMALL, INTERMITTENT STREAM RECEIVING ACID MINE-DRAINAGE1

1982 ◽  
Vol 18 (2) ◽  
pp. 196-199 ◽  
Author(s):  
Andrew J. Lampkin ◽  
Milton R. Sommerfeld
Keyword(s):  
Intermittent Stream ◽  
Acid Mine ◽  
Algal Distribution

PATTERNS OF EPIPELIC ALGAL DISTRIBUTION IN AN ACIDIC ADIRONDACK LAKE

1988 ◽  
Vol 24 (2) ◽  
pp. 146-152 ◽  
Author(s):  
Deborah A. Roberts ◽  
Charles W. Baylen
Keyword(s):  
Algal Distribution
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