2 research outputs found
Nutritional, structural and chemical defenses of common algae species against juvenile sea urchins
Este artĂculo contiene 14 pĂĄginas, 6 figuras, 3 tablas.Herbivory is a widespread biotic interaction
with important ecological and evolutionary implications.
Benthic marine systems show greater producer consumption
than any other aquatic or terrestrial environment.
Marine algae and plants have a variety of defensive
mechanisms such as structural, chemical, and nutritional
traits with the capacity to reduce herbivore consumption.
These mechanisms can function simultaneously. Here,
we quantified consumption by juvenile Diadema africanum
and Paracentrotus lividus on 15 algal species (1) to
investigate the relative contribution of algal nutritional,
chemical, and structural traits to the patterns of consumption
and (2) to assess whether this relative contribution
varies as a function of herbivore species. Differences in
consumption were found between sea urchins; however,
changes differed across algal and herbivore species.There was no clear relationship between the nutritional
contents and consumption rates on the studied species of
algae. The structure and chemical defenses of algae species
played an important role in the feeding behavior of
the studied herbivores. Our results suggest that multiple
defensive traits may be necessary to deter herbivores in
the field.This study was funded by the âFundaciĂłn Caja
Canariasâ under postgraduate fellowship (awarded to Adriana RodrĂguez).
This research is a contribution of the Consolidated Research
Group "Grupo de EcologĂa BentĂłnica" (SGR2009-655) of the Catalan
Government.Peer reviewe