The Bat Fauna of Some Isolated Islands in Scandinavia

Ahlén, Ingemar

doi:10.2307/3544093

Cited by 18 publications

(12 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The area and species number relationship has also been found for many organisms, including bats (Ahlen 1983). However, my result should not be compared with these theories.…”

Section: Discussionmentioning

confidence: 53%

See 1 more Smart Citation

Habitat use and species richness of bats in a patchy landscape

De¹

1995

Acta Theriol.

View full text Add to dashboard Cite

de Jong J. 1995. Habitat use and species richness of bats in a patchy landscape. Acta Theriologica 40: 237-248.Habitat destruction and fragmentation caused by modern forestry and agriculture are some of the main problems for the long-term survival of many species. In this study, a bat community of 11 species was investigated with the objective to evaluate the impacts of patch size, distance between habitat patches and habitat quality on species number, and also to investigate the use of corridors. Habitat islands, varying in size from 0.1 to 98.7 ha, in an agriculture-dominated landscape were surveyed. Habitat use by four species: Myotis brandti (Eversmann, 1845), M. nattereri (Kuhl, 1818), Pipistrellus pipistrellus (Schreber, 1774), and Plecotus auritus (Linnaeus, 1758), was recorded in detail. In a stepwise multiple regression species number was found to be positively related to the area of deciduous woodland, but not to the area of coniferous forest or the distance to the continuous forest. Three of the four study species avoided all kinds of open habitats. Corridors were used as hunting habitats. Different hypotheses that might explain behaviour in open habitats are discussed.

show abstract

“…The area and species number relationship has also been found for many organisms, including bats (Ahlen 1983). However, my result should not be compared with these theories.…”

Section: Discussionmentioning

confidence: 53%

“…Baker and Genoways (1978) analysed the bat fauna of the Antillean Island and discussed invasion routes, barriers and endemism. Ahlen (1983) studied bat fauna on islands in Scandinavia. He found that area, distance and latitude significantly affected the number of species and explained 80% of the variation.…”

Section: Introductionmentioning

confidence: 99%

Habitat use and species richness of bats in a patchy landscape

De¹

1995

Acta Theriol.

View full text Add to dashboard Cite

show abstract

“…In addition, the effect of the highly fragmented Alexander Archipelago on bat occurrence and movement in Southeast Alaska is unknown. Island isolation is known to influence distribution of bat species in Scandinavia (Ahlén, 1983;Johansson and de Jong, 1996). Further documentation of bat distribution in the Alexander Archipelago is necessary to elucidate latitudinal and island biogeographical gradients in species richness in Southeast Alaska.…”

Section: Resultsmentioning

confidence: 99%

“…Bat distribution is likely constrained by the limit of the tree line, although a few records in southwestern Alaska (Iliamna Lake, Pedro Bay, Larsen Bay) indicate the occurrence of bats in habitats that lack large trees. Others also have found the occurrence of forests is correlated with the distribution of bats at northern latitudes (Ahlén, 1983;Ekman and de Jong, 1996), even when the bats inhabit buildings above the Arctic Circle (Rydell et al, 1994). This relationship appears to be important, and roost structure (Humphrey, 1975) and cover for predator avoidance (Rydell and Speakman, 1995) are likely contributing factors.…”

Section: Environmental Factorsmentioning

confidence: 99%

Distributional Limits of Bats in Alaska

Parker¹,

Lawhead²,

Cook³

1997

ARCTIC

View full text Add to dashboard Cite

ABSTRACT. Bats in temperate regions are relatively well studied, yet little research has focused on the northern limit of their distribution. We document the northwestern extent of bats in North America using museum holdings, literature records, and field research in Alaska. Six bat species are confirmed from Alaska: Myotis lucifugus, M. keenii, M. californicus, M. volans, Lasionycteris noctivagans, and Eptesicus fuscus. M. lucifugus occurs throughout much of Alaska south of the Arctic Circle, whereas four other species occur only in Southeast Alaska. Climate, roost availability, extent of forested habitat, geographic barriers, length of night, and prey abundance appear to influence the distribution of bats in Alaska, although the relative contribution of these factors is unknown.Key words: Alaska, latitude, bats, distribution, limiting factors, Myotis, Lasionycteris, Eptesicus RÉSUMÉ. Si, dans les régions tempérées, les chauves-souris ont fait l'objet d'études relativement approfondies, on a par contre mené peu de recherches sur la limite septentrionale de leur répartition. Cet article décrit l'extension nord-ouest de l'aire des chauves-souris en Amérique du Nord en faisant appel à des pièces muséologiques, des documents comportant des relevés, et des recherches sur le terrain en Alaska. On confirme que six espèces de chauves-souris se retrouvent en Alaska: Myotis lucifugus, M. keenii, M. californicus, M. volans, Lasionycteris noctivagans et Eptesicus fuscus. M. lucifugus est répandue presque partout en Alaska au sud du cercle polaire, tandis que quatre autres espèces ne se retrouvent que dans le sud-est de l'Alaska. Il semble que le climat, la disponibilité des sites de reproduction, l'étendue de l'habitat forestier, les barrières géographiques, la longueur de la nuit et l'abondance des proies influencent la distribution des chauves-souris en Alaska, bien qu'on ne connaisse pas la contribution relative de ces facteurs.

show abstract

“…In Scandinavia, bats inhabit some islands that are located far from the coast (Ahlén 1983). Factors that restrict this phenomenon include the small surface of the island, a scarcity of trees, a lack of roosts, and a low diversity and abundance of insect prey.…”

Section: Introductionmentioning

confidence: 99%

Empty in summer, crowded during migration? Structure of assemblage, distribution pattern and habitat use by bats (Chiroptera: Vespertilionidae) in a narrow, marine peninsula

2015

View full text Add to dashboard Cite

According to scarce available data, the use of coastal habitats by bats appears to be the most intensive during spring and autumn migrations, when coasts become migratory corridors. Migrating bats might seasonally enrich the fauna of sea islands and peninsulas, which often are poor in bats outside the migratory season. Hel Peninsula is part of the Polish Baltic Coast that extends the most into the sea; thus, it gives unique opportunity to assess that phenomenon quantitatively. To test for seasonal variation in structure of bat assemblage and bat activity, we recorded echolocation calls on walking transects. Seven species were recorded in total, with predominance of sedentary Eptesicus serotinus in June-July and migratory Pipistrellus nathusii in August-September. Occurrence of bats was the highest in deciduous and coniferous forests and the lowest in coasts and ports. Interaction of day of year and distance to mainland was highly significant, indicating that occurrence of bats was increasing from spring to autumn but this increase depended on location. Far from mainland, the mean occurrence of bats was rather stable over time. On transects located close to the mainland, bat occurrence was low at the beginning of the season but after midAugust increased rapidly. We confirmed that some topographically isolated parts of the sea coasts can host only very impoverished summer bat fauna. Bat activity in such sites increase in autumn; however, Hel Peninsula presumably does not act as a migratory corridor, but only as a target of local dispersal from mainland.

show abstract

The Bat Fauna of Some Isolated Islands in Scandinavia

Cited by 18 publications

References 4 publications

Habitat use and species richness of bats in a patchy landscape

Habitat use and species richness of bats in a patchy landscape

Distributional Limits of Bats in Alaska

Empty in summer, crowded during migration? Structure of assemblage, distribution pattern and habitat use by bats (Chiroptera: Vespertilionidae) in a narrow, marine peninsula

Contact Info

Product

Resources

About