Linking climate change and species invasion:
effects on intertidal habitats. 2010-2012. (Ministerio
de Ciencia e Innovación, CGL2009-07205, IP Dr. Olabarria).
The combined impacts of invasion and climate
change on coastal ecosystem functioning.
para a Ciência e a Tecnologia, Portugal; IP Dr. Arenas).
Factors affecting distribution
and spread of Sargassum muticum on the Galician coast.
2007-2009. (Ministerio de Medio Ambiente- SARGAL- and Xunta de
Galicia; IP Dr. Incera).
For more info: Sargassum
introduction of non-native seaweeds into different ecosystems is a
global phenomenon that may cause significant social and economic
hardships. Evidences suggest that non-native species alter
significantly local communities. Sargassum muticum
Yendo (Fensholt) originates from Asia and was introduced to North
America in the 1940s and to Europe in the early 1970s. This species
was first observed along the northern Spanish coast in the 1980s and
has subsequently spread along from Asturias in the Galician coasts.
It has since successfully colonized the shallow-subtidal and the low
intertidal shores where coexists and, in certain cases, dominates on
exposed and semi-exposed shores previously occupied by the local
brown seaweed, Saccorhiza polyschides. Moreover, large
amounts of S. muticum and S. polyschides (wrack) are
deposited on the Galician exposed beaches throughout the entire
intertidal range being buried in the sediments or move about by
tides and waves.
main goal of these projects is to study the effect of the invasive
seaweed, S. muticum, on the specific composition, abundance
and structure of local invertebrate and algae communities from two
diverse intertidal ecosystems (rocky shores and exposed beaches- via
wrack deposition-). We
want to compare similarities or differences between communities
associated with S. muticum and those associated with the
local seaweed, S. polyschides, and, therefore, to determine
the ecological consequences of invasion by S. muticum.
Moreover, factors affecting colonization, establishment, distribution and spread of
S. muticum will be evaluated. In
addition, we will determine and compare the effects of S. muticum
and S. polyschides wrack on structure and composition of
macrofaunal assemblages on exposed beaches.