A Desert Ecosystem is a system in which living things (plants, animals, microbes) interact with non-living parts (soil, air, water, temperature) in a region that is extremely dry. It is defined by very low rainfall (often less than about 250 mm per year), and scarcity of moisture is a crucial limiting factor. The system is … Read more
Toxins produced by some notable Algae Dinoflagellates Dinoflagellates produce potent neurotoxins, which affect nervous system of animals and humans, and are often implicated in shellfish poisoning. Brevetoxins are made by Karenia brevis and bind to voltage-gated sodium channels, causing neurotoxic shellfish poisoning (NSP). Saxitoxins (and related paralytic shellfish toxins, PSTs) are produced by Alexandrium and … Read more
What are Brown Algae (Phaeophyceae)? Habitats of Brown Algae Characteristic Features of Brown Algae Classification of Brown Algae Brown Algae Classification Taxonomic Rank Classification Domain Eukaryota Kingdom Chromista Phylum Ochrophyta Class Phaeophyceae Orders Fucales, Laminariales, Dictyotales Families Fucaceae, Laminariaceae, Dictyotaceae Genera Fucus, Laminaria, Dictyota Species Fucus vesiculosus, Laminaria digitata, Dictyota dichotoma Morphology and Structure of … Read more
What is Rhodophyta (Red Algae)? The Rhodophyta (red algae) are a group of mostly marine, photosynthetic, eukaryotic organisms. They are colored red (or shades of red / purple) because of accessory pigments like phycoerythrin (and phycocyanin) which mask the green of chlorophyll. The cells do not have flagella or centrioles at any stage. Unstacked thylakoids … Read more
Algal cultivation means growing algae (microalgae or seaweeds) in controlled or partly controlled environments for useful biomass. The algae are supplied with light, carbon (often CO₂), water and nutrients so growth is promoted. In open ponds (raceway ponds etc.), cultures are exposed to ambient conditions, and mixing is provided to avoid shading and settling. Photobioreactors … Read more
Economic Importance of Algae Overview Algae is a photosynthetic, eukaryotic marine organism. Their size ranges from unicellular microalgae to giant kelp. Algae are characterized by their lack of flowers, formal roots, leaves, or even stems. They can grow anywhere such as in the dirt or on rocks, marine water, freshwater, etc. Algae are variable in shapes, … Read more
The reproduction in Algae is considered to be a fundamental biological process, and it is carried out by different modes which are usually classified into Vegetative, Asexual, and Sexual methods. By vegetative processes, new individuals are produced from somatic parts, and this happens without involvement of spores or gametes, which makes it simple yet very … Read more
Algal morphology is defined as the study of body structure and organization of algal cells and their thalli. Algae are observed in a diversity of sizes and shapes, from microscopic single-celled forms to large seaweeds several meters long. The science concerned with algae is termed Phycology, and a specialist is called an Algologist or Phycologist. … Read more
What is Euglena? The term Euglena denotes a genus of unicellular, flagellated eukaryotic organisms (protists). In many habitats (freshwater, moist soils, brackish waters) these organisms are found. The cell is bounded by a flexible proteinaceous pellicle (not a rigid cell wall), which allows shape changes (metaboly) under movement pressures. One or two flagella (one often … Read more
What is Algae? Characteristics of Algae Habitat of Algae The Habitat of algae is described as highly diverse, because algae are of universal occurrence and are found in water, land, snow, hot springs, inside plants/animals, and even in extreme saline or aerial conditions. The Aquatic algae are predominant in occurrence, and they are present in … Read more
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