Testing the facilitation-competition paradigm under the stress-gradient hypothesis: Decoupling multiple stress factors

Takashi Kawai, Mutsunori Tokeshi

研究成果: ジャーナルへの寄稿記事

98 引用 (Scopus)

抄録

While the facilitation-competition paradigm under the stress-gradient hypothesis has received recent attention, its rigorous testing is yet to be explored. Most of the studies have considered a switch in the net interactions from competition to facilitation with increasing environmental stress as primary evidence supporting the hypothesis, though few studies examined changes in interaction along a full range of a stress gradient. Here, we have conceptualized possible variations in the patterns of change in interaction strength along such gradient. Based on this, we empirically evaluated the temporal shift in the interaction between two marine sessile animals, goose barnacles (Capitulum mitella) and mussels (Septifer virgatus), under multiple stress factors. The net effect of goose barnacles on mussel survivorship was positively related to the total stress gradient encompassing two stress factors, physical disturbance and thermal stress, while no negative value occurred even under mild conditions. When the two stress factors were treated separately, however, the net effect demonstrated apparently different patterns: monotonic increase with physical disturbance versus a quasi-asymptotic pattern (no change over a wide range) with thermal stress. These variable situations have not previously been recognized in this discipline, and the present study emphasizes the importance of an integrative and mechanistic approach to testing and deciphering the facilitation-competition paradigm.

元の言語英語
ページ(範囲)2503-2508
ページ数6
ジャーナルProceedings of the Royal Society B: Biological Sciences
274
発行部数1624
DOI
出版物ステータス出版済み - 10 7 2007

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Thoracica
Lepadidae
Geese
Bivalvia
thermal stress
facilitation
mussels
Mitella
Hot Temperature
Thermal stress
Testing
physical disturbance
survival rate
testing
Animals
Switches
animals
environmental stress
survivorship
animal

All Science Journal Classification (ASJC) codes

  • Medicine(all)
  • Immunology and Microbiology(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)

これを引用

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