Plant coexistence depends on ecosystem nutrient cycles: extension of the resource-ratio theory.

@article{citeulike:295969, abstract = {We present a model of plant-nutrient interactions that extends classical resource competition theory to environments in which essential nutrients (resources) are recycled between plant and soil pools and dissolved nutrients are lost through plant-available (i.e., inorganic forms) or plant-unavailable (i.e., complex organic forms) pathways. Losses by dissolved organic pathways can alter ratios of nutrients that are recycled and supplied within the plant-soil system, thereby influencing competition and coexistence among plant species. In special cases, our extended model does not differ from classical models, but in more realistic cases our model introduces new dynamical behavior that influences competitive outcomes. At equilibrium, coexistence still depends on nutrient supply and consumption, but nutrient supply includes recycling and is highly sensitive to whether a species promotes more organic losses of the nutrient that limits its own growth than of nutrients that limit its competitors. Because recycling operates with a time delay compared with consumption, recycling-mediated effects on competition can, under certain conditions, lead to sustained population oscillations. Our findings have implications for how we understand nutrient competition, nutrient cycles, and plant evolutionary strategies.}, address = {Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. daufresn@toulouse.inra.fr}, author = {Daufresne, T. and Hedin, L. O. }, citeulike-article-id = {295969}, comment = {植物と栄養分の相互作用のモデルで、栄養分がリサイクルされる．二種の植物と二種の栄養分を考える．リサイクルの内実、たとえば相手の成長制限要素を排出促進するなどによって共存の条件がこれまでのモデルと違ってくることもありえる．}, doi = {10.1073/pnas.0406427102}, issn = {0027-8424}, journal = {Proc Natl Acad Sci U S A}, keywords = {05matheco14, biogeochemistry, cat\_ecology, evolution, method\_model, nutrient\_losses, plant\_competition, recycling}, month = {June}, number = {26}, pages = {9212--9217}, posted-at = {2005-08-17 09:20:04}, priority = {0}, title = {Plant coexistence depends on ecosystem nutrient cycles: extension of the resource-ratio theory.}, url = {http://dx.doi.org/10.1073/pnas.0406427102}, volume = {102}, year = {2005} }

TY - JOUR ID - citeulike:295969 L3 - citeulike-article-id:295969 TI - Plant coexistence depends on ecosystem nutrient cycles: extension of the resource-ratio theory. JF - Proc Natl Acad Sci U S A VL - 102 IS - 26 SP - 9212 EP - 9217 AD - Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA. daufresn@toulouse.inra.fr SN - 0027-8424 N2 - We present a model of plant-nutrient interactions that extends classical resource competition theory to environments in which essential nutrients (resources) are recycled between plant and soil pools and dissolved nutrients are lost through plant-available (i.e., inorganic forms) or plant-unavailable (i.e., complex organic forms) pathways. Losses by dissolved organic pathways can alter ratios of nutrients that are recycled and supplied within the plant-soil system, thereby influencing competition and coexistence among plant species. In special cases, our extended model does not differ from classical models, but in more realistic cases our model introduces new dynamical behavior that influences competitive outcomes. At equilibrium, coexistence still depends on nutrient supply and consumption, but nutrient supply includes recycling and is highly sensitive to whether a species promotes more organic losses of the nutrient that limits its own growth than of nutrients that limit its competitors. Because recycling operates with a time delay compared with consumption, recycling-mediated effects on competition can, under certain conditions, lead to sustained population oscillations. Our findings have implications for how we understand nutrient competition, nutrient cycles, and plant evolutionary strategies. KW - 05matheco14 KW - biogeochemistry KW - cat_ecology KW - evolution KW - method_model KW - nutrient_losses KW - plant_competition KW - recycling N1 - 植物と栄養分の相互作用のモデルで、栄養分がリサイクルされる．二種の植物と二種の栄養分を考える．リサイクルの内実、たとえば相手の成長制限要素を排出促進するなどによって共存の条件がこれまでのモデルと違ってくることもありえる． AU - Daufresne, T AU - Hedin, LO PY - 2005/06/28/ UR - http://dx.doi.org/10.1073/pnas.0406427102 ER -