Structural complexity and benthic metabolism: resolving the links between carbon cycling and biodiversity in restored seagrass meadows
| Type | : | ACL |
|---|---|---|
| Nature | : | Production scientifique |
| Au bénéfice du Laboratoire | : | Non |
| Statut de publication | : | Publié |
| Année de publication | : | 2024 |
| Auteurs (6) | : | KINDEBERG Theodor ATTARD K,m HÜLLER J MÜLLER J QUINTANA C,o INFANTES E |
| Revue scientifique | : | Biogeosciences |
| Volume | : | 21 |
| Fascicule | : | 7 |
| Pages | : | 1685-1705 |
| DOI | : | 10.5194/bg-21-1685-2024 |
| URL | : | - |
| Abstract | : | Due to large losses of seagrass meadows worldwide, restoration is proposed as a key strategy for increasing coastal resilience and recovery. The emergence of a seagrass meadow is expected to substantially amplify biodiversity and enhance benthic metabolism by increasing primary productivity and respiration. Nevertheless, open questions remain regarding the metabolic balance of aging seagrass meadows and the roles benthic communities within the seagrass ecosystem play in overall metabolism. To address these questions, we investigated a chronosequence of bare sediments and adjacent Zostera marina meadows of 3 and 7 years since restoration alongside a natural meadow located within a high-temperate marine embayment in Gaso, Sweden. We combined continuous measurements of O 2 fluxes using underwater eddy covariance with dissolved inorganic carbon (DIC) and O 2 fluxes from benthic chambers during the productive season (July). Based on the ratio between O 2 and DIC, we derived site-specific photosynthetic and respiratory quotients, enabling the conversion of eddy covariance fluxes to DIC. We assessed benthic diversity parameters as potential drivers of metabolic flux variability. We observed high rates of gross primary productivity (GPP) spanning - 18 to - 82 mmol DIC m - 2 d - 1 , which increased progressively with meadow age. Community respiration (CR) mirrored the GPP trend, and all meadows were net heterotrophic (GPP < CR), with net community productivity (NCP) ranging from 16 to 28 mmol DIC m - 2 d - 1 . While autotrophic biomass did not increase with meadow age, macrophyte diversity did, elucidating potential effects of niche complementarity among macrophytes on community metabolism. These findings provide valuable insights into how community composition and meadow development relate to ecosystem functioning, highlighting potential tradeoffs between carbon uptake and biodiversity. |
| Mots-clés | : | - |
| Commentaire | : | - |
| Tags | : | - |
| Fichier attaché | : | - |
| Citation | : |
Kindeberg T, Attard KM, Hüller J, Müller J, Quintana CO, Infantes E (2024) Structural complexity and benthic metabolism: resolving the links between carbon cycling and biodiversity in restored seagrass meadows. Biogeosciences 21: 1685-1705 | doi: 10.5194/bg-21-1685-2024
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