期刊
MARINE ENVIRONMENTAL RESEARCH
卷 162, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2020.105179
关键词
Autotrophic; Cymodocea nodosa; Caulerpa prolifera; Eutrophication; Heterotrophic; Macroalgae; Net community production; Seagrass
资金
- Excellence Project of Junta Andalucia [RNM-P12-3020]
- [CTM 2011-24482]
- [CTM 2017-85365-R]
Nutrient enrichment can alter negatively benthic communities and reduce their ecological services. This study explores in two contrasting seasons (winter and summer), the effects of in situ nutrient enrichment at the community level on carbon metabolism and dissolved organic carbon (DOC) fluxes in two benthic communities dominated by the seagrass Cymodocea nodosa and by the macroalga Caulerpa prolifera. Under nutrient enrich-ment, C. nodosa increased total community biomass and diversity in summer, while net community production shifted from net autotrophic to net heterotrophic in winter. In contrast, C. prolifera became heterotrophic in summer, while no significant effects were found in winter. Regarding DOC fluxes, nutrient enrichment shifted C. nodosa from net DOC consumer in winter to a strong net DOC producer in summer, while C. prolifera seemed unaffected. Therefore, nutrient enrichment can promote conditional effects (positive, negative or neutral) in coastal areas both on and season.
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