Functional Performance of Three Invasive Marenzelleria Species Under Contrasting Ecological Conditions Within the Baltic Sea

Autor(es)

Quintana, Cintia O. ^[1] ; Raymond, Caroline ^[2] ; Nascimento, Francisco J. A. ^[2] ; Bonaglia, Stefano ^[2] ; Forster, Stefan ^[3] ; Gunnarsson, Jonas S. ^[2] ; Kristensen, Erik ^[1]

Afiliação do(s) autor(es)

^[1] Univ Southern Denmark, Dept Biol, Campusvej 55, DK-5230 Odense M - Denmark

^[2] Stockholm Univ, Dept Ecol Environm & Plant Sci, Svante Arrhenius Vag 20A, S-10691 Stockholm - Sweden

^[3] Univ Rostock, Inst Biol Sci, Marine Biol, Albert Einstein Str 3, D-18059 Rostock - Germany

• Tipo de documento: Artigo Científico
• Fonte: ESTUARIES AND COASTS; v. 41, n. 6, p. 1766-1781, SEP 2018.
• Citações Web of Science: 5

Resumo

A 4-week laboratory experiment investigated the behaviour (survival and bioirrigation) and impact of the invasive polychaetes Marenzelleria viridis, M. neglecta and M. arctia on sediment-water solutes exchange, porewater chemistry, and Fe and P interactions in high-salinity sandy sediment (HSS) and low-salinity muddy sediment (LSM) from the Baltic Sea. M. viridis showed deep burrowing with efficient bioirrigation (11 L m(-2) day(-1)) and high survival (71%) in HSS, while M. arctia exhibited shallow burrowing with high bioirrigation (12 L m(-2) day(-1)) and survival (88%) in LSM. M. neglecta behaved poorly in both ecological settings (bioirrigation, 5-6 L m(-2) day(-1); survival, 21-44%). The deep M. viridis bioirrigation enhanced total microbial CO2 (TCO2) production in HSS by 175% with a net efflux of NH4 (+) and PO4 (3-), at rates 3- to 27-fold higher than for the other species. Although the shallow and intense bioirrigation of M. arctia in LSM stimulated microbial TCO2 production to some extent (61% enhancement), the nutrient fluxes close to zero indicate that it effectively prevented the P release. Porewater Fe:PO4 (3-) ratios revealed that the oxidizing effect of M. arctia bioirrigation increased the PO4 (3-) adsorption capacity of LSM twofold relative to defaunated controls while no buffering of PO4 (3-) was detected in M. viridis HSS treatment. Therefore, the different behaviour of the three species in various environments and the sharp contrast between M. viridis and M. arctia effects on C, N and P cycling must be considered carefully when the ecological role of Marenzelleria species in the Baltic Sea is evaluated. (AU)

• Processo FAPESP: 12/06121-1 - Vias de degradação da matéria orgânica em sedimentos costeiros marinhos: implicações para o funcionamento do ecossistema (PATHWAYS)
• Beneficiário: Cintia Organo Quintana
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado