Seaweed | Definition, Types, & Facts | Britannica
2024年11月15日 · Seaweed, any of the red, green, or brown marine algae that grows along seashores. Seaweeds are generally anchored to the sea bottom or other solid structures by rootlike ‘holdfasts,’ which perform the sole function of attachment and do not extract nutrients as do the roots of higher plants.
thick. Common as an undercanopy species on top of rocks. Invasive. Mazaella splendens, Irridescent Weed Red family. Thallus thin and rubbery, may be up to 24 cm wide, 40 cm long. May range from dark green, to violet, to deep crimson in color. Irridescent when wet. Ulva spp., Sea Lettuce Green family. Multiple species in area require genetic ...
Seaweed - Wikipedia
Seaweed, or macroalgae, refers to thousands of species of macroscopic, multicellular, marine algae. The term includes some types of Rhodophyta (red), Phaeophyta (brown) and Chlorophyta (green) macroalgae.
Seaweed descriptions and pictures
Identification guide for selected marine non-native species (National Museum Wales). ( Download free PDF, about 3.5 Mb ). Fact sheets for Irish Seaweeds (with common names agus logainmneacha Ghaeilge)
The NHBS Guide to UK Seaweed Identification
2020年7月27日 · This photographic guide aims to demystify seaweed identification for the non-specialist. Over 235 species are described in detail, with colour photographs, information on habitat, distribution and confusion species.
Meet the seaweed types - Marine Conservation Society
Identifying seaweeds on the shore can be difficult. We've created this photograph ID guide to make it a bit easier. This guide only includes the 14 species which we're looking to record, but you might find other species on the beach, too. Keep your eyes peeled for the key ID features and take lots of pictures when you submit your survey.
SEAWEED – CLASSIFICATION, SOURCE AND USES - ResearchGate
2022年5月1日 · Seaweeds are potential renewable resources in the marine environment where about 6,000 species have been identified and grouped into three major classes, namely Rhodophyceae (red), Phaeophyceae...
How to identify seaweed - Discover Wildlife
Seaweeds require enough light to photosynthesise, so are most abundant in the intertidal zone; especially along rocky shores. Here are 12 for you to spot and identify. Magazine gift …
The Seaweed Site :: information on marine macroalgae
Most people know two general categories of seaweeds: wracks (species of the brown algal order Fucales such as Fucus) and kelps (species of the brown algal order Laminariales such as Laminaria), and many of you have heard of Carrageen or Irish Moss (usually the red alga, Chondrus crispus) and Dulse or Dillisk (also a red alga, Palmaria palmata).
The Wonderful World of Seaweeds - NOAA Ocean Exploration
Seaweeds are multicellular plantlike organisms composed of green, brown and red macroalgae, so-called due to the presence of particular pigments in their structures. They differ from plants by lacking true roots, stems and leaves, and in having a great variety of …