Global change and biological interactions: what can we learn from Patagonian marine communities?

VALIÑAS, MACARENA; BLUM, RICARDA; GALVAN, DAVID EDGARDO; VARISCO, MARTÍN; MARTINETTO, PAULINA

Global Change in Atlantic Coastal Patagonian Ecosystems

Springer Nature

Año: 2021;

Speciesare connected with others via trophic and non-trophic relationships,thus any effect of global change (GC) on one species may consequentlyimpact other species by changing the direction and/or the strength ofbiological interactions. In this chapter, we explore through studycases how GC drivers may affect the composition and structure ofmarine Patagonian communities by changing positive and/or negativeinteractions. Examples include impacts of invasive species, increasein nutrient inputs and impacts of multiple GC drivers.Eutrophication impacts enhance growth rates, increase biomass, changenutritional quality and generate shifts in species composition ofprimary producers, which indirectly affected consumers. In general,positive interactions (e.g., facilitation) between sessile invasivespecies and native ones are more frequently documented thaninterference processes. Multiple GC drivers may benefit some speciesand harm others by modifying simultaneously bottom-up and top-downprocesses. Finally, we point out some current research gaps andprovide perspectives for future investigation in order to achieve thebest ecological approach to understand how marine ecosystems as awhole are facing global change in Patagonia.p { margin-bottom: 0.25cm; direction: ltr; line-height: 115%; text-align: left; orphans: 2; widows: 2; background: transparent }a:link { color: #0563c1; text-decoration: underline }