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Related Concept Videos

Other Algae01:19

Other Algae

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The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
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Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
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The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
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Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
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Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
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A Standardized Procedure for Monitoring Harmful Algal Blooms in Chile by Metabarcoding Analysis
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Trace element patterns in marine macroalgae.

Paraskevi Malea1, Theodoros Kevrekidis2

  • 1Department of Botany, School of Biology, Aristotle University, GR-54124 Thessaloniki, Greece.

The Science of the Total Environment
|July 22, 2014
PubMed
Summary
This summary is machine-generated.

Seaweed species and morphology significantly influence trace element accumulation, with some species acting as potential biomonitors for elements like selenium and arsenic. This research aids in coastal environmental protection and biomonitoring program design.

Keywords:
BioaccumulationBiomonitorConcentration factorInterspecific variationMetalSeaweeds

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Area of Science:

  • Marine Biology
  • Environmental Chemistry
  • Ecotoxicology

Background:

  • Trace element accumulation in seaweeds is crucial for understanding marine ecosystem health.
  • Interspecific variation in seaweed bioaccumulation requires further investigation.
  • Seaweeds are increasingly recognized for their potential in biomonitoring marine pollution.

Purpose of the Study:

  • To investigate interspecific variation in trace element concentrations and concentration factors (CFs) in dominant macroalgae.
  • To compare element accumulation across different algal phyla (Phaeophyceae, Rhodophyta, Chlorophyta) and morphologies.
  • To identify potential seaweed biomonitors for specific trace elements in the Aegean Sea.

Main Methods:

  • Analysis of 26 dominant macroalgae species from the Gulf of Thessaloniki, Aegean Sea.
  • Determination of concentrations and CFs for a wide range of trace elements (As, Ba, Cd, Co, Cr, Cu, Mn, Mo, Ni, Pb, Se, Sr, U, V, Zn).
  • Application of uni- and multivariate statistical analyses to compare element accumulation patterns.

Main Results:

  • Phaeophyceae exhibited higher As and Sr accumulation than Rhodophyta and Chlorophyta, linked to biochemical composition.
  • Filamentous macroalgae showed greater accumulation of Cd, Co, Cr, Cu, Mn, and V, related to thallus morphology.
  • Specific species like Cystoseira spp. (As), Padina pavonica (Sr, U), Ceramium spp. (Mn), Cladophora spp. (Co, Cr), Polysiphonia deusta and Ulva clathrata (Cd) were high accumulators. Ulva rigida demonstrated positive correlations for Se and As with seawater and sediment concentrations, respectively.

Conclusions:

  • Seaweed species and thallus morphology are key factors in trace element bioaccumulation.
  • Certain seaweed species, such as Ulva rigida, show potential as biomonitors for specific elements (Se, As).
  • The findings support the use of seaweed biomonitoring for coastal environment protection and management.