The interspecific relationships of seaweeds and their role in the formation of communities of Ahnfeltia tobuchiensis (Kanno et Matsubara, 1932) Makienko, 1970 (Rhodophyta)

The interspecific relationships of seaweeds and their role in the formation of communities of... The character and intensity of interspecific relationships between common species of an Ahnfeltia bed community (Ahnfeltia tobuchiensis, Ahnfeltiopsis flabelliformis, Chondrus armatus, and Ptilota filicina) were investigated in relation to light levels and concentrations of dissolved inorganic nitrogen and phosphorus compounds. Growth and photosynthetic rates of seaweeds were measured in mono and co-cultures, as well as in a medium containing the metabolites of attendant species. Under low light conditions, A. tobuchiensis showed the highest competitive ability among the species we studied. The experimental results indicated both negative (exploitative competition, allelopathic inhibition of production processes of a competitor) and positive (stimulation of growth and photosynthesis of accompanying species) relationships between seaweeds. Increased nutrient concentrations and light levels resulted in a substantial reduction in the intensity of interspecific relationships. The dynamic system of positive and negative relationships may regulate the A. tobuchiensis community structure; the intensity of interspecific relationships depends on the availability of resources such as light and nutrients. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

The interspecific relationships of seaweeds and their role in the formation of communities of Ahnfeltia tobuchiensis (Kanno et Matsubara, 1932) Makienko, 1970 (Rhodophyta)

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Publisher
Pleiades Publishing
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S1063074014050046
Publisher site
See Article on Publisher Site

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