Context-dependent resilience of intertidal seagrass and venerid clams after hyposalinity stress

被引:3
作者
Roman, Marta [1 ,2 ]
Vazquez, Elsa [1 ,2 ]
Viejo, Rosa M. [3 ,4 ]
Woodin, Sarah A. [5 ]
Wethey, David S. [5 ]
Roman, Salvador [1 ,2 ]
Weidberg, Nicolas [1 ,2 ,5 ]
Troncoso, Jesus S. [1 ,2 ]
Mendez, Maria M. [6 ,7 ,8 ]
Olabarria, Celia [1 ,2 ]
机构
[1] Univ Vigo, Ctr Invest Marina, Campus Univ As Lagoas, Vigo 36310, Spain
[2] Univ Vigo, Dept Ecol & Biol Anim, Fac Ciencias Mar, Campus Univ As Lagoas, Vigo 36310, Spain
[3] Univ Rey Juan Carlos, Area Biodiversidad & Conservac, Madrid 28933, Spain
[4] Univ Rey Juan Carlos URJC, Inst Invest Cambio Global, IICG, Madrid 28933, Spain
[5] Univ South Carolina, Dept Biol Sci, 715 Sumter St, Columbia, SC 29208 USA
[6] Consejo Nacl Invest Cient & Tecn, Inst Biol Organismos Marinos, Bvd Brown 2915, Puerto Madryn, Argentina
[7] Univ Nacl Patagonia San Juan Bosco, Blvd Brown 3051, Puerto Madryn, Argentina
[8] Univ Oviedo, Dept Biol Organismos & Sistemas, Oviedo 33071, Spain
关键词
Shellfisheries; Climate change; Low-salinity stress; Ruditapes philippinarum; Ruditapes decussatus; Venerupis corrugata; Seagrass; Recovery; RIA FORMOSA LAGOON; ZOSTERA-NOLTII; CLIMATE-CHANGE; RUDITAPES-PHILIPPINARUM; POSITIVE INTERACTIONS; SALINITY; ESTUARINE; RESPONSES; NITROGEN; WATER;
D O I
10.3354/meps14516
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Reduced salinity in estuarine areas can negatively affect intertidal seagrass meadows where clams are harvested. However, legacy effects of hyposalinity on seagrasses and infaunal clams and on their interactions have seldom been studied. Legacy effects were examined in the intertidal seagrass Zostera noltei and juveniles of the clams Venerupis corrugata, Ruditapes decussatus and R. philippinarum. Low-salinity stress was applied to mesocosms that included assemblages of seagrass and the 3 clam species that were subsequently transplanted to 2 shellfish beds characterized by different environmental conditions (i.e. seawater temperature, salinity and nutrient concentration). After 2 mo, the morphological and biochemical traits of Z. noltei and the growth and mortality of the clams were measured. Past hyposalinity stress increased clam mortality and decreased Z. noltei leaf length. The native V. corrugata was the most vulnerable to past hyposalinity, whereas the introduced clam R. philippinarum was the most resilient. The presence of clams was associated with greater nitrogen content and biomass of the above-ground parts of Z. noltei. Survival of the clams after past hyposalinity stress was greater below Z. noltei than below bare sediment, indicating persistent positive interactions following the harsh environmental conditions and during low-salinity periods in the field. At the colder and more nutrient-rich site, positive interactions were more frequent and Z. noltei performed better. This supported the influence of abiotic conditions on the recovery process. Nonetheless, enhanced survival of clams below Z. noltei indicates that Z. noltei could favour the sustainability of these shellfisheries after exposure to extreme rainfall events.
引用
收藏
页码:117 / 133
页数:17
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