Light Level as a Potential Limiting Factor in the Growth of Zostera Marina Eelgrass in the Pacific Northwest PDF Download

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Light Level as a Potential Limiting Factor in the Growth of Zostera Marina Eelgrass in the Pacific Northwest

Light Level as a Potential Limiting Factor in the Growth of Zostera Marina Eelgrass in the Pacific Northwest PDF Author: Mark Justin Hylarides
Publisher:
ISBN:
Category : Eelgrass
Languages : en
Pages : 164

Book Description
From Abstract: Eelgrasses serve as important nursery habitats in the Pacific Northwest for diverse marine life and are widely recognized as indicators of coastal ecological health. Seasonal differences in respiration and Photosynthesis-Irradiance (P-I) relationships of a population of marine eelgrass Zostera marina in Rosario Bay, WA were investigated in order to characterize its growth potential in different seasons. The local light availability in situ for each season was also estimated by combining direct light measurements under different conditions with hourly weather and tide measurements. Measurement of the P-I relationship of blade sections and extrapolation to whole plants demonstrated that sufficient light is present even in the lowest-light season (winter) so that clean eelgrass is able to at least support its metabolism by photosynthesis and experience net growth. However, epiphytic algae living on the blades of Z. marina likely reduces its access to light, especially in summer, and could potentially lead to light limiting conditions.