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First Field-Based Evidence That the Seagrass-Lucinid Mutualism Can Mitigate Sulfide Stress in Seagrasses ArchiMer
Van Der Geest, Matthijs; Van Der Heide, Tjisse; Holmer, Marianne; De Wit, Rutger.
Seagrass meadows form vital ecological components of coastal zones worldwide, but are rapidly declining. Large-scale seagrass diebacks have been related to accumulation of toxic sulfide in the sediment, a phenomenon predicted to occur more frequently in the near future due to ongoing global warming and increasing organic loading of coastal systems worldwide. Recently, a facultative mutualism between seagrasses and lucinid bivalves with endosymbiotic sulfide-consuming gill bacteria was discovered that may prevent toxic sulfide accumulation in seagrass sediments. Yet, direct field-based evidence for the importance of this mutualism in alleviating sulfide stress in seagrasses is currently lacking, as well as how its role may change when sediment sulfide...
Tipo: Text Palavras-chave: Delta S-34; Seagrass performance; Environmental change; Sediment sulfide stress; Seagrass-lucinid mutualism; Lucinid bivalves; Mutualistic interactions.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00609/72073/70782.pdf
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Blue Carbon Storage Capacity of Temperate Eelgrass (Zostera marina) Meadows ArchiMer
Rohr, Maria Emilia; Holmer, Marianne; Baum, Julia K.; Bjork, Mats; Chin, Diana; Chalifour, Lia; Cimon, Stephanie; Cusson, Mathieu; Dahl, Martin; Deyanova, Diana; Duffy, J. Emmet; Eklof, Johan S.; Geyer, Julie K.; Griffin, John N.; Gullstrom, Martin; Hereu, Clara M.; Hori, Masakazu; Hovel, Kevin A.; Hughes, A. Randall; Jorgensen, Pablo; Kiriakopolos, Stephanie; Moksnes, Per-olav; Nakaoka, Masahiro; O'Connor, Mary I.; Peterson, Bradley; Reiss, Katrin; Reynolds, Pamela L.; Rossi, Francesca; Ruesink, Jennifer; Santos, Rui; Stachowicz, John J.; Tomas, Fiona; Lee, Kun-seop; Unsworth, Richard K. F.; Bostrom, Christoffer.
Despite the importance of coastal ecosystems for the global carbon budgets, knowledge of their carbon storage capacity and the factors driving variability in storage capacity is still limited. Here we provide an estimate on the magnitude and variability of carbon stocks within a widely distributed marine foundation species throughout its distribution area in temperate Northern Hemisphere. We sampled 54 eelgrass (Zostera marina) meadows, spread across eight ocean margins and 36 degrees of latitude, to determine abiotic and biotic factors influencing organic carbon (C-org) stocks in Zostera marina sediments. The C-org stocks (integrated over 25-cm depth) showed a large variability and ranged from 318 to 26,523gC/m(2) with an average of 2,721gC/m(2). The...
Tipo: Text Palavras-chave: Blue carbon; Seagrass; Z; Marina.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00610/72199/70994.pdf
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