Species richness, extinction and immigration rates of vascular plants on islands in the Stockholm archipelago, Sweden, during a century of ceasing management

Löfgren, Anders; Jerling, Lenn

doi:10.1007/bf02805213

Cited by 22 publications

(33 citation statements)

References 29 publications

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“…From the Festuca community to the Carex-Sesleria community, we found the slope to increase and the intercept to decrease (Table 2). Similar changes in the slope of the SAR were observed during community succession in an oak stand in Bialowieza Primeval Forest, Poland (Kwiatkowska, 1994), on 18 islands of the Stockholm Archipelago, Sweden (Lo¨fgren and Jerling, 2002), and on old fields in Bohemia, Czech Republic (Lepsˇand Sˇtursa, 1989).…”

Section: Discussionsupporting

confidence: 51%

“…1d). In a study dealing with community succession on different-sized islands in Sweden, in contrast, Lo¨fgren and Jerling (2002) found that the successionrelated increase in the slope of the SAR was due to the fact that many plant species of the later successional stages occurred only on large islands (see Fig. 1b).…”

Section: Article In Pressmentioning

confidence: 80%

“…Fridley et al, 2005;Keeley, 2003;Lawesson et al, 1998). However, very few studies have directly addressed how plant communities affect the SAR and what are the underlying mechanisms (but see Kwiatkowska, 1994;Lo¨fgren and Jerling, 2002).…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Plant communities affect the species–area relationship on Carex sempervirens tussocks

Yu¹,

Krüsi²,

Schütz³

et al. 2008

Flora - Morphology, Distribution, Functional Ecology of Plants

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Section: Discussionsupporting

confidence: 51%

Section: Article In Pressmentioning

confidence: 80%

See 1 more Smart Citation

Plant communities affect the species–area relationship on Carex sempervirens tussocks

Yu¹,

Krüsi²,

Schütz³

et al. 2008

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…The archipelago can be divided into three zones: the inner zone close to the mainland with a denser set of islands covered by coniferous forests, the middle zone with deciduous forests and the outer zone where the scattered islands only have trees in sheltered places (Löfgren & Jerling, 2002 and references therein). In open places, among bare rock, mainly Calluna vulgaris (L.) Hull, Empetrum nigrum L.…”

Section: Methodsmentioning

confidence: 99%

“…The archipelago was formerly used for fishing and hunting, while almost all larger (unpopulated) islands were utilized for grazing, haymaking and forestry. The economic exploitation of the archipelago has diminished since the 1920s, and after the 1960s it almost ceased and became replaced by leisure activities and summer cottages (Löfgren & Jerling, 2002). There are houses on the two largest islands studied.…”

Section: Methodsmentioning

confidence: 99%

Colonization of Sphagnum on land uplift islands in the Baltic Sea: time, area, distance and life history

Sundberg¹,

Hansson

Rydin

2006

Journal of Biogeography

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Aim To test whether species richness of Sphagnum mosses on islands in a land uplift archipelago is related to island age, area or connectivity, and whether the frequency of different species can be predicted by their life history and autecology.Location The northern Stockholm archipelago in the Baltic Sea, east-central Sweden, with a current land uplift rate of 4.4 mm year )1 . MethodsWe sampled 17 islands differing in area (0.55-55 ha), height (3.6-18 m, representing c. 800-4000 years of age) and distance from mainland (1.6-41 km). For each Sphagnum patch we measured area, height above sea level, horizontal distance from the shore and shading from vascular plants. Factors affecting island species richness, species frequency and habitats on the islands were tested by stepwise regressions. Species frequency was tested on nine life history and autecological variables, including estimated abundance and spore output on the mainland, habitat preference and distribution. ResultsWe recorded 500 patches of 19 Sphagnum species, distributed in 83 rock pools on 14 islands. Island species richness correlated positively with island area and with degree of shelter by surrounding islands, while distance from the mainland, connectivity, height or age did not add to the model. Species frequency (number of colonized islands and rock pools) was mainly predicted by spore output on the mainland and by habitat preference (swamp forest species were more frequent than others), while spore size, for example, did not add to the model. Species differed in mean height above and horizontal distance from the shore, area of occupied rock pools and in the degree of shading of patches. The mean horizontal distance from the shore and the area of occupied rock pools correlated positively with the normal growth position above the water table among species. Spore capsules were found in only 2% of patches, mostly in the bisexual Sphagnum fimbriatum. Main conclusionsThe presence of Sphagnum in the Stockholm archipelago seems to be governed by regional spore production and habitat demands. Sphagnum does not appear to be dispersal limited at distances up to 40 km and time spans of centuries. Species with a high regional spore output have had a higher colonization rate, which, together with the rarity of spore capsules on the islands, indicate the mainland as a source for colonization rather than dispersal among islands. Swamp forest species seem more tolerant to the island conditions (summer droughts and some salt spray) than open mire species. The different distances from the sea occupied by the species indicate a slow, continuous succession and species replacement towards the island interior as islands are being uplifted and thus expand in area. This partly explains why larger islands harbour more species. Our results thus support some of the island biogeographical theories related to the species-area relationship.

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2016

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Species richness, extinction and immigration rates of vascular plants on islands in the Stockholm archipelago, Sweden, during a century of ceasing management

Cited by 22 publications

References 29 publications

Plant communities affect the species–area relationship on Carex sempervirens tussocks

Plant communities affect the species–area relationship on Carex sempervirens tussocks

Colonization of Sphagnum on land uplift islands in the Baltic Sea: time, area, distance and life history

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