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Benthic/Invertebrate Training

Benthic/Invertebrate Training. Algae Swath. Johnson. Macrocystis pyrifera. Macrocystis pyrifera. Count all plants larger than 1 meter high When counting stipes of Macrocystis plants, begin counting at 1 meter above bottom (usually waist high if standing). Nereocystis luetkeana.

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Benthic/Invertebrate Training

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  1. Benthic/Invertebrate Training Algae Swath Johnson

  2. Macrocystis pyrifera

  3. Macrocystis pyrifera • Count all plants larger than 1 meter high • When counting stipes of Macrocystis plants, • begin counting at 1 meter above bottom • (usually waist high if standing)

  4. Nereocystis luetkeana Efird

  5. Nereocystis luetkeana • Must be at or above 30 cm in height to count • Long spindly stipe ending with large pneumatocyst • at the top of water

  6. >6cm Efird Cystoseira osmundacea Efird

  7. Cystoseira osmundacea • Become reproductive with long chain bladders during • summer season • Must be at least 6 cm in diameter to be counted • In order to get a proper count, it is necessary to grab • each plant and find its base to distinguish an individual • from a group of plants

  8. Photo from Gotshall Pterygophera californica Efird

  9. Pterygophera californica • Has very sturdy woody stipe • Frond contains long, wide midrib with several blades • sticking out on either side • Count all Pterygophera plants above 30cm high

  10. Eisenia arborea Photo from Gotshall

  11. Eisenia arborea • Has very thick, flexible stipe which spits into two at • the top • Several blades sprout out to each side of the Y-shaped • stipe and gives alga a bushy appearance • Count all Eisenia plants above 30cm high

  12. Guiry Laminaria setchellii Photo from Gotshall

  13. Laminaria setchellii • Has very slender, flexible stipe • Frond is long, wide and usually tears in several places • causing it to look like a palm • Count all Laminaria plants above 30cm high

  14. Costaria costata

  15. Costaria costata • Large blade (up to 2m) with very small stipe • This alga is characterized by its five ribs; two are located on one side of the blade, three on the other

  16. Laminaria farlowii Ragsac

  17. Laminaria farlowii • Has an extremely short stipe with long wide blade attached • Blade must be 10 cm wide for plant to be counted

  18. Alaria marginata

  19. Alaria marginata • Usually found in the low intertidal or very shallow subtidal • Short stipe with very long blade, puckered around a pronounced midrib

  20. Pleurophycus gardneri

  21. Pleurophycus gardneri • Seen frequently in more Southern sites such as Big Sur and Cambria • Like Laminaria setchellii, but with large, lighter colored midrib up to 4 cm wide • Blade is wavy with slight puckering at midrib

  22. Undaria pinnatifida

  23. Undaria pinnatifida • When reproductive, it has a very large and distinct sporophyll at base of plant • Easily spread invasive species; do not pull up, but mark its location and notify leader of dive team

  24. Conclusion • Any member of the benthic/invert team maybe asked to perform algae counts • It is extremely important for every person on the invert team to be proficient on algae swath species and protocol

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