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- Article] Spatial heterogeneity of mortality and temporal fluctuation in fertility promote coexistence but not vice versa: A random-community approach
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DocNo of ILP: 3679
Doc. Type: Article
Title: Spatial heterogeneity of mortality and temporal fluctuation in fertility promote coexistence but not vice versa: A random-community approach
Authors: Muko, S; Iwasa, Y
Full Name of Authors: Muko, Soyoka; Iwasa, Yoh
Keywords by Author: spatial heterogeneity; temporal fluctuation; lottery model; random community; species coexistence
Keywords Plus: SPACE-LIMITED SUBPOPULATIONS; COMPETITIVE COEXISTENCE; SPECIES COEXISTENCE; VARYING ENVIRONMENTS; LARVAL DISPERSAL; LOTTERY MODEL; DYNAMICS; VARIABILITY; RECRUITMENT; HISTORY
Abstract: Both spatial heterogeneity and temporal fluctuation of the environment are important mechanisms promoting species coexistence, but they work in different manners. We consider many pairs of species with randomly generated survivorship and fertility in the lottery model, and examine how the variability in demographic processes affects the outcome of competition. The results are: [Amarasekare, P., Nisbet, R.M., 2001. Spatial heterogeneity, source-sink dynamics, and the local coexistence of competing species. Am. Nat. 158, 572-584] Coexistence is easier if habitat difference in mortality is greater, or if year-to-year variation in reproductive rate is larger. But neither habitat-difference in fertility nor temporal variation in mortality promotes coexistence. [Armstrong, R.A., McGehee, R., 1976. Coexistence of species competing for shared resources. Theor. Popul. Biol. 9, 317-328] Mean fertility does not affect the outcome if CV remains constant. In contrast, enhanced mean mortality decreases the fraction of coexisting pairs if the environment fluctuates temporally. [Buia, M.C., Mazzella, L., 1991. Reproductive phenology of the Mediterranean seagrasses Posidonia oceanica (L.) Delile, Cymodocea nodosa (Ucria) Aschers., and Zostera noltii Hornem. Aquat. Bot. 40, 343-362] We also investigate the effect of limited dispersal of propagules between habitats. Compared with the complete mixing case, the fraction of coexisting pairs is clearly enhanced if the spatial heterogeneity is the major source of environmental variation, but shows slight increase if the temporal fluctuation is dominant. We conclude that spatial heterogeneity is likely to work more effectively in promoting species coexistence than temporal fluctuation, especially when the species suffer relatively high mortality, and disperse their propagules in a limited spatial scale. (C) 2008 Elsevier Ltd. All rights reserved.
Cate of OECD: Biological sciences
Year of Publication: 2008
Business Area: other
Detail Business: medicine & science
Country: England
Study Area: industry, production, habit
Name of Journal: JOURNAL OF THEORETICAL BIOLOGY
Language: English
Country of Authors: [Muko, Soyoka; Iwasa, Yoh] Kyushu Univ, Fac Sci, Dept Biol, Fukuoka 8128581, Japan
Press Adress: Muko, S (reprint author), Kyushu Univ, Fac Sci, Dept Biol, Fukuoka 8128581, Japan.
Email Address: muko@bio-math10.biology.kyushu-u.ac.jp; yiwasscb@mbox.nc.kyushu-u.ac.jp
Citaion: Iwasa, Yoh/0000-0003-0691-1852
Funding:
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Number of Citaion: 33
Publication: ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
City of Publication: LONDON
Address of Publication: 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
ISSN: 0022-5193
29-Character Source Abbreviation: J THEOR BIOL
ISO Source Abbreviation: J. Theor. Biol.
Volume: 253
Version: 3
Start of File: 593
End of File: 600
DOI: 10.1016/j.jtbi.2008.04.008
Number of Pages: 8
Web of Science Category: Biology; Mathematical & Computational Biology
Subject Category: Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology
Document Delivery Number: 331VJ
Unique Article Identifier: WOS:000258040400019
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