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Plant dispersal characteristics shape the relationship of diversity with area and isolation

Title data

Walentowitz, Anna J. ; Troiano, Claudia ; Christiansen, Julie B. ; Steinbauer, Manuel ; Barfod, Anders S.:
Plant dispersal characteristics shape the relationship of diversity with area and isolation.
In: Journal of Biogeography. Vol. 49 (2022) Issue 9 . - pp. 1599-1608.
ISSN 0305-0270
DOI: https://doi.org/10.1111/jbi.14454

Official URL: Volltext

Abstract in another language

Aim

The relation of plant dispersal syndromes with insular species richness patters remains one of the challenges in island biogeography, especially as people have affected species distribution patterns. This study disentangles how dispersal syndromes influence the relationship of richness with area and isolation while also accounting for the human impact on island biodiversity. It builds on the potential of islands at the mesoscale and of similar origin to contribute to the ongoing discussion in island biogeography on what determines species richness and filtering.
Location

Denmark, 54 islands in the North and Baltic Sea.
Taxon

Vascular plants, including pteridophytes.
Methods

Generalized linear models (GLMs) and linear regressions are used to analyse how dispersal syndromes influence the relationships of species numbers with island area and isolation, as well as island inhabitation and human density, respectively.
Results

Species numbers, seed mass and the proportion of zoochore and anemochore species are positively related to island area while the share of water-dispersed species decreases with increasing area. Isolation is weakly related to mean seed mass but has no explaining power for species numbers and the presence of specific dispersal syndrome on the target islands. Species richness and seed mass were positively related to human presence.
Main conclusions

Human impact for centuries has not overwritten the strong relationship of species richness with area on the Danish Islands but is affecting the shape of this relationship. Island area constitutes a strong filter for different dispersal syndromes and leads to the assumption that heavier and animal-dispersed seeds are positively related to area due to the presence of more bird and mammal species. Human-induced loss of isolation caused by ongoing traffic and the connection of landmasses by bridges and ferries may be a reason for the overall low explanatory power of island isolation.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: dispersal pathways; dispersal syndromes; establishment; insular biodiversity; plant species richness; SAR
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Biogeography > Chair Biogeography - Univ.-Prof. Dr. Carl Beierkuhnlein
Faculties > Faculty of Cultural Studies > Department of Sport Science > Professor Sport Ecology
Faculties > Faculty of Cultural Studies > Department of Sport Science > Professor Sport Ecology > Professor Sport Ecology - Univ.-Prof. Dr. Manuel Jonas Steinbauer
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Cultural Studies
Faculties > Faculty of Cultural Studies > Department of Sport Science
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 570 Life sciences, biology
500 Science > 580 Plants (Botany)
Date Deposited: 12 Jul 2022 06:33
Last Modified: 29 Sep 2022 09:45
URI: https://eref.uni-bayreuth.de/id/eprint/70545