Evolution of nutrient acquisition: when adaptation fills the gap between contrasting ecological theories

被引:13
作者
Boudsocq, S. [1 ]
Barot, S. [2 ]
Loeuille, N. [3 ,4 ]
机构
[1] Ecole Normale Super, Ecol Lab, UMR 7618, 46 Rue Ulm, F-75230 Paris 05, France
[2] IRD, Ecol Lab, UMR 7618, F-93143 Bondy, France
[3] Univ Paris 06, Ecol Lab, UMR 7625, F-75005 Paris, France
[4] INRA, USC 203, Ecol Populat & Communautes, F-75005 Paris, France
关键词
adaptive dynamics; nutrient accumulation; nutrient recycling; nutrient uptake evolution; R*; tragedy of the commons; DYNAMICS; SOIL; CONSEQUENCES; OPTIMIZATION; COEVOLUTION; COMMUNITIES; STRATEGIES; RESISTANCE; ORGANISMS; TRAGEDY;
D O I
10.1098/rspb.2010.1167
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Although plant strategies for acquiring nutrients have been widely studied from a functional point of view, their evolution is still not well understood. In this study, we investigate the evolutionary dynamics of these strategies and determine how they influence ecosystem properties. To do so, we use a simple nutrient-limited ecosystem model in which plant ability to take up nutrients is subject to adaptive dynamics. We postulate the existence of a trade-off between this ability and mortality. We show that contrasting strategies are possible as evolutionary outcomes, depending on the shape of the trade-off and, when nitrogen is considered as the limiting nutrient, on the intensity of symbiotic fixation. Our model enables us to bridge these evolutionary outcomes to classical ecological theories such as Hardin's tragedy of the commons and Tilman's rule of R*. Evolution does not systematically maximize plant biomass or primary productivity. On the other hand, each evolutionary outcome leads to a decrease in the availability of the limiting mineral nutrient, supporting the work of Tilman on competition between plants for a single resource. Our model shows that evolution can be used to link different classical ecological results and that adaptation may influence ecosystem properties in contrasted ways.
引用
收藏
页码:449 / 457
页数:9
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