Long-term decline of the canopy-forming algae Gelidium corneum, associated to extreme wave events and reduced sunlight hours, in the southeastern Bay of Biscay
作者： Angel Borja , Guillem Chust , Almudena Fontán , Joxe Mikel Garmendia , María C. Uyarra
DOI: 10.1016/J.ECSS.2018.03.016
关键词: Significant wave height 、 Atmospheric sciences 、 Sunlight 、 Bay 、 Biomass (ecology) 、 Canopy 、 Environmental science 、 Algae 、 Nitrate 、 Nutrient
摘要: Abstract Canopy-forming macroalgae are experiencing large biogeographical shifts due to climate change. One of them (Gelidium corneum) has shown a dramatic decline in biomass northern Spain, the past 20 years. We investigate here two most plausible hypotheses explain its decline: (i) combination increasing wave energy and decrease irradiance growth season; (ii) light summer decreasing nutrient concentration. Using dataset environmental variables (1993–2016), three sectors water depths, we have determined that explaining more variability were: suspended solids, nitrate, sunlight hours, significant height threshold exceedances (Hs5m), temperature, silicate, nitrite. When undertaking multiple regression analyses for whole depth range, only model including hours with Hs5m was selected, being highly (p
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