Switch between competition and facilitation within a seasonal scale at colony level in bryophytes

Oecologia
Daniel Spitale

Abstract

The relative importance of positive and negative interaction in species assemblages is thought to be dependent on the harshness of the physical environment. I studied the consistency of this prediction in a field experiment using growth of the target species Warnstorfia exannulata as influenced by the presence or absence of two adjacent species, Sphagnum warnstorfii and Scapania undulata. In particular, I focused on the mechanism by which colony-colony interactions occur, elucidating how the balance of positive and negative interactions changes along a water gradient. Because the natural fluctuations of the environment modify the water gradient, it was expected that the competitive hierarchies of the species would not remain consistent over time. Results indicated that the different hydrological properties of the colonies, thought to be the necessary condition for the appearance of species interactions, were not sufficient to explain the outcome of the species interactions. The switch from competition to facilitation under more stressful conditions was not confirmed along a water stress gradient. In addition, natural climatic fluctuations, by affecting the length of the water gradient, changed the competitive hierarchies of the...Continue Reading

References

May 24, 2001·Proceedings of the National Academy of Sciences of the United States of America·C P MulderD F Doak
Jun 21, 2002·Nature·Ragan M CallawayBradley J Cook
Oct 27, 2004·Proceedings. Biological Sciences·Fernando T Maestre, Jordi Cortina
May 1, 1994·Trends in Ecology & Evolution·M D Bertness, R Callaway
Feb 1, 1993·Ecological Applications : a Publication of the Ecological Society of America·R J MitchellD H Gjerstad
Oct 1, 2000·The New Phytologist·M C F Proctor
Dec 1, 2002·The New Phytologist·Michael C F Proctor, Zoltán Tuba

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