Ecological studies on the community of drifting seaweeds in the south-eastern coastal waters of Izu Peninsula, central Japan. II: Seasonal changes in plants showing maximum stipe length in drifting seaweed communities

Abstract

The authors examined seasonal patterns in 20 sargassaceous species (maximum stipe length of ≥ 45 cm) from 902 patches of drifting seaweeds in the southeastern coastal waters of the Izu Peninsula, central Japan, between spring and autumn, 1991-1993. The first analysis, dealing with plants occurring for three consecutive years, examined the top three ranked species determined from monthly pooled means of frequency of appearance in these 3 years. The second analysis examined not only the top-ranked species in monthly means in each year, but also the continuity of appearance of species among years. The third analysis was made from dendrogram analysis based on monthly samples from each year. The first and second analyses revealed three seasonally discernible changes.

Biological distribution of the rich source of marine algae from the rocky shoreline of the coast of Shivrajpur, Gujarat in India

“…Thivy, in 1958, was the first to survey the occurrence of commercial algal sources on the Indian shoreline. Floating marine algae from the Indian Ocean, Atlantic and Pacific seas have been recorded by Hirata et al, (2003). The findings of this study correlated with earlier studies by Rao et al, (2011), who investigated the seasonal changes in occurrences of marine algae from three distinct areas of the Bhimili coast.…”