Species-specific decomposition rates of beach-cast wrack in Barkley Sound, British Columbia, Canada

Marine Ecology Progress Series

Martin Zimmer¹  Dennis E. Jelinski¹  Malte Mews¹ 

关键词: Marine–terrestrial ecotone;    Beach-cast wrack;    Decomposition;    Macroalgae;    Seagrass;    Talitrid amphipods;   

DOI  :  10.3354/meps328155

学科分类：海洋学与技术

来源: Inter-Research

【 摘 要 】

ABSTRACT: The fate of subtidally drifting macrophytal detritus after its deposition ashore was studied based on short-term mass loss effects and species composition of beach-cast detritus. Different species of macroalgae and seagrass varied in both physical and microbial decay, as well as faunal decomposition rates. Their preferred status as food for detritivorous amphipods also varied. Thus, beach-cast detritus changed in species composition during detritus aging. Estimated turnover rates, based on daily input rates and mass loss rates, ranged from <1 d for Nereocystis luetkeana, Macrocystis integrifolia and Ulva spp. to roughly 30 d for Fucus spp. and Phyllospadix spp. Thus, the dynamics of nutrient fluxes within the marine–terrestrial ecotone depends not only on the spatial distribution and amount of beach-cast detritus, but also on its species composition.

【 授权许可】

Unknown