Dispersal and life history strategies in epiphyte metacommunities: alternative solutions to survival in patchy, dynamic landscapes

Oecologia
Swantje Löbel, Håkan Rydin

Abstract

Host trees for obligate epiphytes are dynamic patches that emerge, grow and fall, and metacommunity diversity critically depends on efficient dispersal. Even though species that disperse by large asexual diaspores are strongly dispersal limited, asexual dispersal is common. The stronger dispersal limitation of asexually reproducing species compared to species reproducing sexually via small spores may be compensated by higher growth rates, lower sensitivity to habitat conditions, higher competitive ability or younger reproductive age. We compared growth and reproduction of different groups of epiphytic bryophytes with contrasting dispersal (asexual vs. sexual) and life history strategies (colonists, short- and long-lived shuttle species, perennial stayers) in an old-growth forest stand in the boreo-nemoral region in eastern Sweden. No differences were seen in relative growth rates between asexual and sexual species. Long-lived shuttles had lower growth rates than colonists and perennial stayers. Most groups grew best at intermediate bark pH. Interactions with other epiphytes had a small, often positive effect on growth. Neither differences in sensitivity of growth to habitat conditions nor differences in competitive abilities am...Continue Reading

References

May 24, 2001·Proceedings of the National Academy of Sciences of the United States of America·C P MulderD F Doak
May 4, 2006·The American Naturalist·Charles E Zartman, A Jonathan Shaw
Nov 3, 2006·The American Naturalist·Marc William CadotteJames A Drake
Jul 1, 1994·Trends in Ecology & Evolution·J BengtssonH Rydin
Jan 1, 2009·Language Learning and Development : the Official Journal of the Society for Language Development·Daniel J WeissAaron D Mitchel

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Citations

Feb 7, 2018·Environmental Management·Juliana Simião-FerreiraRonaldo Angelini
Oct 19, 2017·Anais Da Academia Brasileira De Ciências·Gabriela R CerqueiraLeandro V Ferreira

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