EVSC 4200 Lecture Notes - Lecture 7: Thalassia Testudinum, Zostera, Halodule
18 Feb 2016
School
Department
Course
Professor
Document Summary
Zostera marina bed rhizomes and then roots that come out of the rhizomes into the seabed ties the sediments together. Thalassia testudinum and posedonia are better at tying the sediments together very tough. Nutrient uptake though roots (sediment) and leaves (water (cid:1: uptake varies from plant to plant, leaves that are too heavy will not allow them to uptake column) nutrients. Plant keeps growing at one end and slowly dying off on the other end but a huge amount exist through cloning: sexual pollination (have to have submarine pollination, Physical: hydrodynamic damping in some species you have very very tough leaves. Slow water movement by friction in tensile strength and density. Biological: habitat, base of food web. Economical edge of grass beds: fisheries, recreation, etc. Thalassia testudinum: large flat strap-like leaves, most common, (cid:1) form large extensive meadows. Can get rhizomes up to 7 mm in diameter. Roots can grow up to 19 ft long.
