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Apometzgeria Pubescens (Schrank) Kuwah. in SwedenAuthor(s): Tomas HallingbäckSource: Lindbergia, Vol. 18, No. 3 (1993), pp. 111-112Published by: Oikos Editorial OfficeStable URL: http://www.jstor.org/stable/20149845 .

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LINDBERGIA 18: 111-112. Lund 1993

Apometzgeria pubescens (Schrank) Kuwah. in Sweden

Tomas Hallingb?ck

?Hallingb?ck, T. 1993. Apometzgeria pubescens (Schrank) Kuwah. in Sweden. - Lind

Apometzgeria pubescens is reported new to Sweden. Its distribution and ecology is

briefly discussed.

T. Hallingb?ck, Dept of Ecology and Environmental Research, Swedish Univ. of Agrie. Sei., P. O. Box 7072, S-750 07 Uppsala, Sweden.

~ BnepBtie 3aperacrpHp0BaHa b UIbcuhh Apometzgeria pubescens.

Kpaneo oGcyxAaioTai ee pacnpocrpaHeroie h oKOJioraa.

During an excursion in the vicinity of Huskvarna, Sm?

land, southern Sweden, 10 Aug 1993, a peculiar pu bescent Metzgeria was found, which proved to be Apo

metzgeria pubescens. The closest occurrence of that spe

cies is in the Oslo region of Norway, ca 400 km north-west of the Swedish site. Because it is new to

Sweden, the surprising occurrence of this species in Swe

den is considered below, followed by a comparison of its local and usual ecology and by a consideration of its main distribution.

The new Swedish occurrence

Apometzgeria pubescens was found ca 5 km N of the city of Huskvarna (57?50'N, 14?16'E) in the northern part of the province Sm?land. It occurred together with Lejeunea cavifolia on a vertical rock-wall, above the upper edge of

a N-exposed, mesic and rocky slope, shaded by decid

uous trees, at an altitude of ca 120 m. The rocks were

gabbro or diorite and the walls were covered with a rather thick mat of bryophytes, mainly Anomodoi) viticulosus,

Cirriphyllum crassinervium, Lejeunea cavifolia, Neckera

complanata and Porella platyphylla. The Apometzgeria plants seemed to be in a healthy condition, but sterile.

Accepted 21 January 1994

? LINDBERGIA

LINDBERGIA 18:3 (1993)

Distribution

Apometzgeria pubescens has a scattered holarctic and

even bipolar distribution, including Europe, Asia (Tur

key, boreal Russia, Sakhalin, the Himalayas, China, Ko

rea, Japan), North America (in the West from Alaska to

Washington and Oregon, in the East from Maine to N.

Carolina) and South America (Engel 1978). Kuwahara

(1965) has furthermore reported a var. kinabaluensis from Borneo.

In Europe it is considered boreal-montane, with scat

tered occurrences from southern Italy, Sicily to southern

Norway and from Ireland in the West to the Caucasus in the East (see map in Szweykowski 1962). In central

Europe it is found at low to medium high altitudes (e. g. alt. 200-700 m in former Czechoslovakia, Duda and Vana 1988), while in the western and northern part of

Europe it occurs at lower altitudes. In the Nordic coun

tries it occurrs scattered in Norway, north to Nordland

(ca 66?N.), occurring from sea-level to at least 1200 m; in eastern Norway only found in regions of steep topog

raphy, e. g., north of Oslo (J?rgensen 1934).

Ill

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Discussion

Apometzgeria pubescens has a holarctic, bipolar distribu

tion, with a disjunct population in southern Chile (see map in Schuster 1983). Schuster (1983) explained its distribution by assuming a wider circum-Laurasian distri

bution prior to the Pleistocene, based on the fact that it

today mainly occurs in unglaciated areas. However there

are recent reports of it from several boreal districts of

Russia (Konstantinova et al. 1992) and it is known from more than fifty localities in the boreal part of Norway (J?rgensen 1934) all of which, as well as the new site in

Sweden, were certainly covered by ice during the last

glaciation. Apometzgeria pubescens must have invaded

these northern and eastern areas of Europe after the Pleis

tocene even though this species is dioicous and spores are

rarely produced and it furthermore lacks vegetative prop

agation, all factors limiting its dispersal potential.

Local ecology The occurrence of Apometzgeria pubescens in Sweden is

somewhat surprising as it in Norway prefers the south

western part, with a yearly precipitation of ca 2000 mm,

whereas at the Swedish site precipitation is only ca

600 mm. However, a closer study of the occurrences in

Norway reveals some few occurrences in the Oslo region, with a yearly precipitation similar to the Huskvarna local

ity.

The new site in Sweden was unexpected because the

station is isolated from the main distribution area in

Scandinavia, and also because the bedrock is not lime

stone but a granite with inclusions of gabbro and diorite.

Gabbro and diorite usually contain more calcium carbon

ate than does granite (Lars Persson , Swedish Geological

Survey, Uppsala, pers. comm.).

Acknowledgement -

Many thanks to K. Damsholt for confirm

ing the specimen and for constructive comments on the manu

script.

References

Duda, J. and Vana, J. 1988. Die Verbreitung der Lebermoose in

der Tschechoslovakei - LI. - Cas. Siez. Muz. Opava (A), 37:

17-32.

Engel, J. J. 1978. A taxonomic and phytogeographic study of Brunswick Peninsula (Strait of Magellan). Hepaticae and

Anthocerotae. - Fieldiana (Botany) 41: i-viii, 1-319.

J?rgensen, E. 1934. Norges Levermossor. - Bergens Museums

Skr. 16: 1-340.

Konstantinova, N. A., Potemkin, A. D. and Schljakov, R. N,. 1992. Check-list of the Hepaticae and Anthocerotae of the

former USSR. - Arctoa 1: 87-127.

Kuwahara, 1965. The Metzgeriaceae of Mt. Kinabalu, North

Borneo. - J. Hattori Bot. Lab. 28: 166-170.

Schuster, R. M. 1983. Phytogeography of the bryophyta. p. 464-506. -In: New Manual of Bryology Vol. 1. The Hattori

Bot. Lab. Nichinan, Miyazaki, Japan.

Szweykowski, J. 1962. Atlas of geographical distribution of

sporeplants in Poland. - Ser. 4. Liverworts (Hepaticae). 1-7.

Poznan.

112 LINDBERGIA 18:3 (1993)

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