Constancea 83, 2002
University and Jepson Herbaria
P.C. Silva Festschrift

Marine Benthic Algae of the Russian Coasts of the Bering Sea
(from Ozernoi Gulf to Dezhnev Bay, including Karaginskii Island)

O.N. Selivanova
Kamchatka Branch of Pacific Institute of Geography,
Far Eastern Division, Russian Academy of Sciences,
683000, Petropavlovsk-Kamchatsky, Russia

ABSTRACT

A list of the marine benthic algae of the Russian coasts of the Bering Sea that belong to the administrative region Kamchatka Oblast is given in the paper. Since the marine benthic flora of this region is insufficiently studied and the literature is minimal, the information presented in the article is based mostly on the analysis of the author's own materials. This inventory of the flora of marine algae of the western coasts of the Bering Sea reveals 170 species of macrophytes, including 33 species of green, 39 species of brown, and 98 species of red algae. Twenty species are newly recorded from the area, and four are new to the flora of the Far Eastern seas of Russia. A new species of Phycodrys (Delesseriaceae) was discovered. The information is updated in accordance with new data on taxonomy and nomenclature of the species.

INTRODUCTION

The marine benthic flora of the western coasts of the Bering Sea is poorly investigated. It has been studied by Russian phycologists for many years, but these studies were episodic and uncoordinated. Remoteness and inaccessibility, severe climate and ice conditions, and a short navigation season make this area very inconvenient for natural studies. Practically no seasonal field observations have been conducted there, no marine biological stations have ever existed, and scientific expeditions have been infrequent and sporadic. Therefore information on the structure and composition of benthic vegetation is limited. Special publications on this subject are rare (e.g., Vinogradova 1973a; 1978; Perestenko 1988; Zhigadlova and Selivanova 2003 (in press), although information on the marine algae of this area may be found in some general taxonomic, floristic and detailed hydrobiological studies (Kongisser 1933; Petrov 1972; Vinogradova 1973b, 1973c; 1974; 1979; Kussakin and Ivanova 1978; Vinogradova et al. 1978; Klochkova and Demeshkina 1985; Gusarova and Semkin 1986; Perestenko 1994; Klochkova and Berezovskaya 1997; Klochkova 1998). Short publications (conference abstracts) by T. Klochkova (1999) and Zhigadlova (2000) concerned algae of only the Karaginskii Gulf. Data from some of these publications are cited in Table 1.

The laboratory of Hydrobiology of the Kamchatka Branch of Pacific Institute of Geography (KBPIG) conducted studies on flora and fauna of the Russian continental coasts of the Bering Sea (from Ozernoi Gulf to Dezhnev Bay) during a 7-month-long expedition in 1988. However, processing of phycological material collected during this expedition was delayed. The species were difficult to identify because many of them deviate morphologically from typical forms. This may be due to geographical factors such as the phenomenon of gigantism in northern races of plants and animals. For example, some samples of Porphyra miniata (C.Agardh) C.Agardh from the bays north of Olyutorskii Gulf reach 50–55 cm in length.

It should be noted that taxonomic viewpoints of Russian and western phycologists differ quite often, and that is the case with the above mentioned Porphyra. Lindstrom and Cole (1992a, 1992b) treated species resembling our specimens as P. cuneiformis (Setch. & Hus) Krishnamurthy but their viewpoint is not recognized in Russian literature. Phycologists in our country prefer to follow Perestenko's (1982, 1983, 1994) position, so we identified our samples in accordance with the concept of the latter author as P. miniata. Systematics of the other species within the genus Porphyra is also controversial. For instance, Porphyra purpurea (Roth) C.Agardh was revised by Lindstrom and Cole (1992a, 1992b) who showed by biochemical and genetic analyses that true P. purpurea was distributed only in the Atlantic Ocean, while its Pacific vicariant was described by these authors as a new species P. kurogii S.C.Lindstr. (Lindstrom and Cole 1992b). We followed this viewpoint in our publications dealing with the flora of the Commander Islands and replaced P. purpurea in our list of algae with P. kurogii (Selivanova and Zhigadlova 1997a, 1997c). The morphological description of P. kurogii however was considerably different from that of P. purpurea given by Perestenko (1982; 1994) who insisted on wide Atlantic-Pacific distribution of P. purpurea. There were specimens of Porphyra in our material from Olyutorskii Gulf that morphologically represented P. purpurea in Perestenko's interpretation. There were also specimens that fit into P. kurogii. Additional taxonomic studies are necessary to resolve the problem. Since we have no opportunity to carry out biochemical or genetic analyses, we prefer to keep the morphological approach and to treat P. kurogii and P. purpurea as separate species. They are both presented in Table 1. According to personal information of Gayle Hansen both species also occur in Alaska.

The interpretation of families within the orders has also been disputed. For instance, Perestenko (1975) described the family Crossocarpaceae (Cryptonemiales, Rhodophyta) on the basis of vegetative structure and the morphology of the post-fertilization fusion cell. Independence of this family was supported by Russian phycologists but rejected by Hansen and Lindstrom (1984), who considered the Crossocarpaceae a subgroup within the Kallymeniaceae sensu lato. The circumscription of the family Dumontiaceae is also treated differently by Russian and western phycologists: thus Neoabbotiella araneosa described by Perestenko (1975) is still included by this author (Perestenko 1994) in the Dumontiaceae in spite of the proposal of Lindstrom (1985) to transfer this species from the Dumontiaceae into the Cryptonemiaceae (=Halymeniaceae). Another example, the family Arthrothamnaceae was segregated by Yu. Petrov (1974) from the Laminariaceae on the basis of distinctive features of lamina formation. The Arthrothamnaceae is widely recognized in Russian taxonomic literature but overlooked by other phycologists.

In addition, there are many other unsolved systematic and nomenclature problems. For example, Kraft and Robins (1985) synonymized the order Cryptonemiales with the Gigartinales within the division Rhodophyta. This viewpoint was supported by some phycologists, including leading specialists (e.g., Scagel et al. 1986, 1993; Perestenko 1994). Others (e.g., Silva et al. 1996; Silva 2002) retained the Cryptonemiales as a separate order. Silva (2002) considered the proposal of Kraft and Robins to be retrogressive because the order Cryptonemiales was sufficiently heterogeneous and several new orders had already been segregated from it, including: Hildenbrandiales Pueschel & Cole (1982) and Corallinales Silva & Johansen (1986). Later the Halymeniales was proposed by Saunders and Kraft (1996) to replace the remaining Cryptonemiales on the basis of molecular, histochemical and ultrastructural features. This proposal was disputed by Masuda et al. (1999), who chose the older name, based on priority and the personal recommendation of P. Silva.

These examples show that even higher taxa (orders and families) are still controversial. Systematics of lower taxa (genera and species) is also in many cases unresolved. For example, the number of genera within the order Acrochaetiales has been disputed. Woelkerling (1971, 1973) applied the common generic name Audouinella to the species representing the previously described genera Acrochaetium, Rhodochorton, Colaconema, Meiodiscus etc. Several subsequent authors shared this concept (e.g., Garbary, Hansen, and Scagel 1982) but the others considered transfer of these species to Audouinella unreasonable (Perestenko 1994; Silva et al. 1996). Harper and Saunders (2002) have recently published a new classification of acrochaetioid algae which includes the establishment of the new order Colaconematales. Taxonomy of the group is clearly still in flux.

The main purpose of our work was to make an inventory of the flora of the Russian coasts of the Bering Sea using our own material, taking into consideration current data on taxonomy and nomenclature of the species. We have also tried to include species from earlier studies dealing with benthic algae of the Bering Sea. After revision these data were included in the list of the marine benthic algae of the coasts of the Bering Sea belonging to Kamchatka Oblast in its former boundaries (including Koryak Autonomous Disrtict): from Ozernoi to Olyutorskii Gulf and its northwestern coasts up to Dezhnev Bay.

Data on algae of the Commander Islands are excluded from the present list as they were published earlier in a series of papers (Selivanova and Zhigadlova 1993; 1997a; 1997b; 1997c; 1997d; 1999; 2000; 2002a). Information on the algae of the northern part of the Bering Sea located on the territory of Chukchi Autonomous District (Anadyrskii Gulf, north of Dezhnev Bay to Bering Strait) is not included in the present paper, because the author did not have opportunity to work in this area. Data on the algae of this area may be found in the papers of Vinogradova (1973a, b, c), Tolstikova (1974), Kussakin and Ivanova (1978); Perestenko (1988; 1994), but the inventory of marine algae of this region is far from complete, and additional floristic and taxonomic studies are necessary.

MATERIALS AND METHODS

The list of algae presented in the paper is based on phycological material collected by the author during expedition of the Laboratory of Hydrobiology of KBPIG in the Bering Sea in 1988. The material was collected from August through October on the littoral fringe during low tides, with the help of a long hook called “kanza” from the depths of 1 to 3 m, and with usage of SCUBA technique from the depths of 1 to 30 m and with a dredge from deeper waters (up to 85 m). Algae cast ashore were also picked up.

Material was sectioned freehand with razor blades, placed in a drop of fresh water on the slides and examined using the light microscope. The sections were studied uncoloured or stained with Lugol's solution or aniline dyes.

The processing of collections was conducted at Kamchatka Branch of the Pacific Institute of Geography (Petropavlovsk-Kamchatsky, Russia). I have examined a total of 808 herbarium sheets. All of them are stored in the herbarium of KBPIG (Petropavlovsk-Kamchatsky).

RESULTS AND DISCUSSION

The list of benthic algae of the Ozernoi Gulf to Dezhnev Bay, including Karaginskii Island (Fig.1), totals to 170 species of macroalgae (records from the literature included): 33 species of Chlorophyta, 39 Phaeophyta and 98 Rhodophyta. The author's own collections constitute 90 of the species.

The material is presented in the form of a table (Table 1) for convenience of information retrieval and with the purposes of shortening printed space. Higher taxa (orders within divisions) are arranged in the table according to their systematic position, while families within the orders, genera within the familes and species within the genera are given in alphabetic order. A dash in the column “Depths” means the absence of data. Comments to the species names that may arouse questions are given in the footnotes below the table.

In quoting the data of the other authors I do not always share their opinion on taxonomic status of the species and their nomenclature because quite often the data cited are outdated, not taking into account changes in the nomenclature and systematics of algae which have occurred recently. Nevertheless, they are included in the table with corrections, where it is possible, in conformity with modern taxonomic data. The original information of the other authors in the case I do not accept their interpretation of the species is given in the column ‘Outdated, misapplied or incorrect species name’ (Table 1).

The 20 species new to the flora are marked by an asterisk (*) in the table. The species marked with a double asterisk (**) in the table are recorded from the Far Eastern seas of Russia for the first time. Some of them (Palmaria mollis (Setch. & N.L.Gardner) Van der Meer et Bird, Opuntiella californica (Farlow) Kylin, and Membranoptera setchellii N.L.Gardner) are recorded in our recent study (Zhigadlova and Selivanova 2002) of the marine algae of Karaginskii Gulf. However this work is still in press, so I repeat them here as new to the flora of the Far Eastern seas. Two of the species found in the study area are proposed for inclusion in the Red Data Book of Kamchatka: Membranoptera serrata (Postels & Rupr.) Zinova. (Fig. 2) and Pantoneura juergensii (J.Agardh) Kylin (Fig. 3). This book is a regional edition analogous to the Red Data Book of the Russian Federation, including information on rare and endangered species of flora and fauna of Kamchatka. I inscribed the above mentioned species of algae in this list because of their rarity in our water areas. The Red Data Book of Kamchatka is planned to be published in the near future.

We have also discovered several samples of a new species of the genus Phycodrys (Delesseriaceae, Rhodophyta) (marked by the triple asterisk *** in the table). Sterile and tetrasporic samples representing the new species were found in two bays of the Bering Sea (Lavrov and Glubokaya Bays). We have named the new species in honour of the well-known Russian phycologist Valentina F. Przhemenetskaya (Makienko) who has been studying marine algae of the Far Eastern seas of Russia for about 30 years. The new species differs from other species of the genus Phycodrys by having distromatic lamina and localization of generative proliferations at the base of the lamina. Its description in Russian with Latin diagnosis is given in our paper (Selivanova and Zhigadlova 2002b) that is in press. I include here illustrations and a description in English:

Phycodrys sp. nov. (Figs. 4 a-e)

Plants up to 25 cm long, with marginal prolifications. Laminae membranaceous, pink-reddish to brownish, up to 8 cm wide and 30–70 µm thick in cross section, nearly always distromatic, very rarely monostromatic. Lobes liguliform or cuneiform. Midribs and veins dark and prominent in older parts of the lamina and light and flattened in younger parts. Old parts of the lamina eroded up to the midribs. Glandular cells absent. Tetrasporangia up to 90 µm in diam. (70 µm without cell wall), located on prolifications at the basal part of the lamina. Cystocarps not found.

Type: Russia, Bering Sea, Glubokaya Bay, 5–7 m depth, 26 VIII 1988, collected by O.N. Selivanova ( 1872). Kept in Kamchatka Branch of the Pacific Institute of Geography, Far Eastern Division Russian Academy of Sciences.

Growing in subtidal zone, on rocks and stones, at the depths of 5–7 m.

The new species differs from the other species of the genus Phycodrys by having a mostly distromatic lamina and localized generative proliferations at the base of the lamina.

Specimens examined:

1872 (type): Glubokaya Bay, 5–7 m depth, rocks, tetrasporic, 26 VIII, 1988, coll. A.G. Bazhin; 1860, 1868, 1869; 8470; 1871-1873, Glubokaya Bay, 5–7 m depth, rocks and stones, tetrasporic, 26 VIII 1988, coll. A.G. Bazhin; 1861 Olyutorskii Gulf, Lavrov Bay, 6–7 m depth, rocks, sterile, 22 VIII 1988, coll. O.N. Selivanova.

According to Vinogradova and Perestenko (1978) the marine benthic flora of the western part of the Bering Sea differs considerably from that of the southeastern Kamchatka and Commander Islands. Comparison of the species composition of the macrophytes from these areas in our collection confirmed this statement. There are principal differences between floristic complexes of the areas possibly due to the system of marine currents. Cold arctic currents in the Bering Sea cause invasion of elements of flora from the Arctic Ocean, in its turn, the flora of the Commander Islands is enriched by the species from the American coasts. We also noted an interesting phenomenon: there were no samples of Yendonia crassifolia (Rupr.) Kylin in our collections from the Commander Islands, while we have many of them from the Bering Sea, including Karaginskii Island; on the contrary, its close relative Mikamiella ruprechtiana (A. Zin.) Wynne was abundant in the Commander Islands and absent in our collections from the Bering Sea. It should be noted that these two species are recorded by other authors from both water areas. In addition, Pantoneura juergensii is relatively abundant on Karaginskii Island whereas it is very rare in other areas and has been proposed for inclusion as a rare species in the Red Data Book of Kamchatka. However comparison of floristic complexes of the three water areas of the Russian Pacific (eastern Kamchatka, the Bering Sea, and Commander Islands) is not the task of the present publication: we plan to prepare a separate paper concerning this problem.

ACKNOWLEDGEMENTS

I am thankful to all colleagues from Hydrobiology Lab (KB PIG) who participated in collecting of algae, especially to A.G. Bazhin and D.D. Danilin. I would also like to thank my colleague Galina G. Zhigadlova for her participation in the identification of algal species.

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