Linking land and sea: Arthropod vectors for marine subsidies
(English)Manuscript (Other academic)
Several studies have shown nutrients and energy derived from marine plants and algae to subsidize shore ecosystems, increasing productivity and affecting food web dynamics and structure. In this study we have examined how the inland reach of such inflow effects depends on vectors carrying the marine inflow inland and on landscape structure. We examined the roles of arthropod vectors in carrying marine derived carbon inland in two very different shore ecosystems: shore meadows in Sweden with marine inflows of algae and emerging chironomid midges, and sandy beaches and shore dunes in Western Australia with marine inflows of algae and seagrass. In both systems we found a larger inland reach of the marine subsidy than could be accounted for by deposited material on shores alone, and that dipterans and spiders functioned as vectors for the inflow. Our results indicate that marine inflows are important for near-shore terrestrial ecosystems well above the water’s edge, and that this effect is largely due to arthropod vectors (mainly dipterans and spiders) in both low productivity sandy beach ecosystems at the Indian Ocean coast of Australia, and more productive shore meadows on the Baltic Sea coast of Sweden.
Research subject Plant Ecology
IdentifiersURN: urn:nbn:se:su:diva-27225OAI: oai:DiVA.org:su-27225DiVA: diva2:213002