Check list of species (algae, invertebrates and vertebrates) found in the vicinity of the island of helgoland (North Sea, German Bight) — a review of recent records

Abstract

The species lists presented for benthic macroalgae, invertebrate and vertebrate species presented are extracted from recent pubhcations (from 1977 to date}. The lists summarize the species composition of the intertidal and subtidal hard-bottom communities around Helgoland. Additional information is supplied for the species composition of the "Steingrund" and "Tiefe Rinne". The lists do not claim completeness, but have been intended to provide a working platform for further listings and for comparison with data published earlier.

Long-term changes in the macrozoobenthos around the rocky island of Helgoland (German Bight, North Sea)

“…To distinguish mere short-term (interannual to intra-decadal) variability from true longterm trends, continued monitoring spanning decades is indispensable. Although there is a more than 100-year tradition in the study of hard-bottom communities around Helgoland (Harms 1993), the macrozoobenthos has never been monitored continuously long-term. Most studies have been mere snapshots, documenting the situation in a particular location over a relatively short period of time (usually less than one annual cycle).…”

“…A comparison of such snapshots taken at large intervals can only give some indications, but no conclusive evidence, of long-term trends in the dynamic of populations. Harms (1993) provided a checklist of species from the Helgoland area, extracted from publications available at that time. Since 1993, however, an increasing number of species have been found which seem to be new to the area.…”

A Competitive Hierarchy Model Integrating Roles of Physiological Competence and Competitive Ability Does Not Provide a Mechanistic Explanation for the Zonation of Three Intertidal Fucus Species in Europe

“…More comprehensive descriptions of the distribution of Helgoland's intertidal species are given by Markham and Munda (1980), Janke (1986) and some of the studies summarized by Harms (1993).…”

A revised checklist of planktonic diatoms and dinoflagellates from Helgoland (North Sea, German Bight)

“…Only those species that have been personally observed by the author and/or by Drebes (Drebes 1974;Drebes and Elbra¨chter 1976) are listed. It is an addition to the checklist of benthic species found in the vicinity of the island of Helgoland (Harms 1993).…”