TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Paar, Martin
A1  - Berthold, Maximilian
A1  - Schumann, Rhena
A1  - Dahlke, Sven
A1  - Blindow, Irmgard
T1  - Seasonal Variation in Biomass and Production of the Macrophytobenthos in two Lagoons in the Southern Baltic Sea
JF  - Frontiers in Earth Science
N2  - Baltic coastal lagoons are severely threatened by eutrophication. To evaluate the impact of eutrophication on macrophytobenthos, we compared the seasonal development in macrophytobenthic composition, biomass and production, water column parameters (light, nutrients), phytoplankton biomass and production in one mesotrophic and one eutrophic German coastal lagoon. We hypothesized that light availability is the main driver for primary production, and that net primary production is lower at a higher eutrophication level. In the mesotrophic lagoon, macrophytobenthic biomass was much higher with distinct seasonal succession in species composition. Filamentous algae dominated in spring and late summer and probably caused reduced macrophytobenthic biomass and growth during early summer, thus decreasing vegetation stability. Light attenuation was far higher in the eutrophic lagoon, due to high phytoplankton densities, explaining the low macrophytobenthic biomass and species diversity in every season. Areal net primary production was far lower in the eutrophic lagoon. The “paradox of enrichment” hypothesis predicts lower production at higher trophic levels with increased nutrient concentrations. Our results prove for the first time that this hypothesis may be valid already at the primary producer level in coastal lagoons.
KW  - -
KW  - eutrophication
KW  - photosynthesis
KW  - submerged vegetation
KW  - drivers
KW  - transitional waters
Y1  - 2021
UN  - https://nbn-resolving.org/urn:nbn:de:gbv:9-opus-43152
SN  - 2296-6463
SS  - 2296-6463
U6  - https://doi.org/https://doi.org/10.3389/feart.2020.542391
DO  - https://doi.org/https://doi.org/10.3389/feart.2020.542391
VL  - 8
PB  - Frontiers Media S.A.
CY  - Lausanne
ER  -