English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The dominant benthic algal species from two sites, located on opposite coasts of the island of São Miguel, Azores (São Roque in the south and São Vicente on the north coast) were studied over a two-year period (September 1993–September 1995). From both sites monthly collections were made in the intertidal zone and in the adjacent subtidal zone down to a depth of 15 m. The algae occur under different ecological conditions, a few species being restricted to the intertidal zone ( Fucus spiralis ,  Gelidium microdon ,  Jania crassa ,  Caulacanthus ustulatus  and  Chondria coerulescens ), while others ( Codium elisabethae ,  Zonaria tournefortii ,  Jania verrucosa  and  Sphaerococcus coronopifolius ) were exclusively present subtidally. Other species were present at both levels. Differences were observed between the two sites. A few species ( Chaetomorpha linum ,  Corallina elongata  and  Caulacanthus ustulatus ) were more abundant at São Roque, their presence on the north being only sporadic or occasional. On the other hand,  Fucus spiralis ,  Gelidium microdon ,  Sphaerococcus coronopifolius  and  Centroceras clavulatum  were statistically more abundant at São Vicente. Seasonal changes were seen in the growth and/or reproduction of certain species, with many ( Ulva rigida ,  Bryopsis hypnoides ,  Stypocaulon scoparium ,  Dictyota dichotoma ,  Padina pavonica ,  Colpomenia sinuosa ,  Gelidium microdon ,  Asparagopsis armata ,  Chondracanthus acicularis  and  Plocamium cartilagineum ) having larger plants and/or higher values of biomass in spring and/or summer. With the exception of  Dictyota dichotoma  that was statistically more abundant in the second sampling year, no differences were observed on the species abundance between the two years. Reproductive phenology varied according to species, with many ( Fucus spiralis ,  Ulva rigida ,  Gelidium microdon ,  Jania rubens ,  Sphaerococcus coronopifolius ,  Caulacanthus ustulatus , and  Plocamium cartilagineum ) having prolonged fertile periods. Some species were more seasonal in their reproduction, being fertile only over two seasons:  Codium elisabethae  and the tetrasporophyte of  Asparagopsis armata  in autumn and winter;  Cystoseira abies-marina  and  Pterocladiella capillacea  in summer and autumn; the gametophyte of  Asparagopsis armata  in winter and early spring. A few had a more restricted fertile period:  Chaetomorpha linum  and  Jania verrucosa  in summer;  Chondracanthus acicularis  in autumn.

Observations on the Biology and Ecology of Selected Macroalgae from the Littoral of São Miguel (Azores)