Eutrophication and drought disturbance shape functional diversity and life-history traits of aquatic plants in shallow lakes
Tóm tắt
Theories that link plant strategies and abiotic filters discriminate between three strategies: competitive, ruderal or stress-tolerant species, and suggest that functional diversity is higher at intermediate values along the gradients of productivity and disturbance. The mechanism by which abiotic filters screen plant traits in aquatic plant communities has been poorly tested and has led to contrasting results. The present study aimed to test whether functional diversity and abundance of life-history traits corresponding to morphology, fecundity and longevity of aquatic plants were linked to disturbance and productivity. Fifty-nine shallow lakes that were arranged along a gradient of productivity (estimated through total phosphorus concentration) and drought-disturbance frequency were sampled for aquatic plants. Species traits were documented and functional diversity was calculated (richness, dispersion and evenness) for each lake. Increasing total phosphorus concentration was associated with decreased functional richness and dispersion but not functional evenness. Functional diversity did not differ according to disturbance frequency, regardless of the index that was measured. High productivity favoured floating species with storage organs and vegetative reproduction, especially at low disturbance frequency. For all disturbance frequencies, low productivity favoured small species without storage organs and sexual reproduction. The present study partly supports the theoretical model. At high productivity levels, because phytoplankton is a better competitor for light than aquatic plants, plant traits are screened stringently, and species with traits that allow them to reach the photic zone are selected.
Tài liệu tham khảo
Arthaud F, Mousset M, Vallod D, Robin J, Wezel A, Bornette G (2011) Effect of light stress on vegetation-propagule bank relationships in shallow lakes. Accepted with modifications in Freshwater Biology
Barko JW, James WF (1998) Effects of submerged aquatic macrophytes on nutrient dynamics, sedimentation, and resuspension. Ecol Stud 131:197–214
Barrat-Segretain MH (1996) Strategies of reproduction, dispersion and competition in river plants: a review. Vegetatio 123:13–37
Bornette G, Henry C, Barrat M-H, Amoros C (1994) Theoretical habitat templets, species traits, and species richness: aquatic macrophytes in the Upper Rhône River and its floodplain. Freshw Biol 31:487–505
Bornette G, Tabacchi E, Hupp C, Puijalon S, Rostan JC (2008) A model of plant strategies in fluvial hydrosystems. Freshw Biol 53:1692–1705
Colasanti RL, Hunt R, Askew AP (2001) A self-assembling model of resource dynamics and plant growth incorporating plant functional types. Funct Ecol 15(5):676–687
Combroux ICS, Bornette G (2004) Propagule banks and regenerative strategies of aquatic plants. J Veg Sci 14:13–20
De Meester L, Declerck S, Stoks R, Louette G, Van De Meutter F, De Bie T, Michels E, Brendonck L (2005) Ponds and pools as model systems in conservation biology, ecology and evolutionary biology. Aquat Conserv: Marine Freshw Ecosyst 15:715–725
Declerck S, Vandekerkhove J, Johansson L, Muylaert K, Conde-Porcuna JM, van der Gucht K, Perez-Martinez C, Lauridsen T, Schwenk K, Zwart G, Rommens W, Lopez-Ramos J, Jeppesen E, Vyverman W, Brendonck L, De meester L (2005) Multi-group biodiversity in shallow lakes along gradients of phosphorus and water plant cover. Ecology 86:1905–1915
Ganade G, Westoby M (1999) Seed mass and the evolution of early seedling etiolation. Am Nat 154:469–480
Greulich S, Barrat-Segretain M-H, Bornette G (2001) Basal rosette or floating leaf canopy–an example of plasticity in a rare aquatic macrophyte. Hydrobiologia 448:53–59
Grime JP (1973) Competitive exclusion in herbaceous vegetation. Nature 242:344–347
Grime JP (1979) Plant strategies and vegetation processes. Wiley, Chichester
Grime JP, Hodgson JG, Hunt R (1990) The abridged comparative plant ecology: a functional approach to common British species. Unwin Hyman, London
Grubb PJ (1985) Plant populations and vegetation in relation to habitat, disturbance and competition: problems of generalization. In: White J (ed) The population structure of vegetation. Junk, Dordrecht, The Netherlands, pp 595–620
Hansson L-A, Annadotter H, Bergman E, Hamrin SF, Jeppesen E, Kairesalo T, Luokkanen E, Nilsson P-Å, Søndergaard M, Strand J (1998) Biomanipulation as an application of food-chain theory: constraints, synthesis, and recommendations for temperate lakes. Ecosystems 1:558–574
Jeppesen E, Jensen JP, Søndergaard M, Lauridsen T, Landkildehus F (2000) Trophic structure, species richness and biodiversity in Danish lakes: changes along a phosphorus gradient. Freshw Biol 45:201–218
Kautsky L (1988) Life strategies of aquatic soft bottom macrophytes. Oikos 53:126–135
Klimešová J, Klimeš L (2007) Bud banks and their role in vegetative regeneration—a literature review and proposal for simple classification and assessment. Perspect Plant Ecol Evol Syst 8:115–129
Laliberté E, Legendre P (2010) A distance-based framework for measuring functional diversity from multiple traits. Ecology 91:299–305
Laliberté E, Shipley B (2010) FD: measuring functional diversity from multiple traits, and other tools for functional ecology. R package version 1.0-9
Leibold MA (1999) Biodiversity and nutrient enrichment in pond plankton communities. Evol Ecol Res 1:73–95
MacArthur RH, Wilson EO (1967) The theory of island biogeography. Princeton University Press, Princeton
Mason NWH, Mouillot D, Lee WG, Wilson JB (2005) Functional richness, functional evenness and functional divergence: the primary components of functional diversity. Oikos 111:112–118
Mouchet MA, Villéger S, Mason NWH, Mouillot D (2010) Functional diversity measures: an overview of their redundancy and their ability to discriminate community assembly rules. Funct Ecol 24:867–876
Nielsen KJ (2003) Nutrient loading and consumers: agents of change in open-coast macrophyte assemblages. Proc Natl Acad Sci USA 100:7660–7665
Paine RT, Levin SA (1981) Intertidal landscapes: disturbance and the dynamics of pattern. Ecol Monogr 51:145–178
Petchey OL, Gaston KJ (2007) Dendrograms and measuring functional diversity. Oikos 116:1422–1426
Puijalon S, Bornette G (2006) Phenotypic plasticity and mechanical stress: biomass partitioning and clonal growth of an aquatic plant species. Am J Bot 93:1090–1099
Rascio N (2002) The underwater life of secondarily aquatic plants: some problems and solutions. Crit Rev Plant Sci 21:401–407
Riis T, Sand-Jensen K, Larsen SE (2001) Plant distribution and abundance in relation to physical conditions and location within Danish stream systems. Hydrobiologia 448:217–228
Scheffer M, Van Geest GJ, Zimmer K, Jeppesen E, Søndergaard M, Butler MG, Hanson MA, Declerck S, De Meester L (2006) Small habitat size and isolation can promote species richness: second-order effects on biodiversity in shallow lakes and ponds. Oikos 112:227–231
Schleuter D, Daufresne M, Massol F, Argillier C (2010) A user’s guide to functional diversity indices. Ecol Monogr 80:469–484
Shea K, Roxburgh SH, Rauschert ESJ (2004) Moving from pattern to process: coexistence mechanisms under intermediate disturbance regimes. Ecol Lett 7:491–508
Søndergaard M, Jeppesen E, Jensen JP, Amsinck SL (2005) Water framework directive: ecological classification of Danish lakes. J Appl Ecol 42:616–629
Southwood TRE (1977) Habitat, the templet for ecological strategies? J Anim Ecol 46:337–365
Spencer DF, Rejmánek M (2010) Competition between two submersed aquatic macrophytes, Potamogeton pectinatus and Potamogeton gramineus, across a light gradient. Aquat Bot 92:239–244
Stöcklin J, Winkler E (2004) Optimum reproduction and dispersal strategies of a clonal plant in a metapopulation: a simulation study with Hieracium pilosella. Evol Ecol 18:563–584
van der Maarel E (2007) Transformation of cover-abundance values for appropriate numerical treatment—alternatives to the proposals by Podani. J Veg Sci 18:767–770
van der Pijl L (1972) Principles of dispersal in higher plants, 2nd edn. Springer, Berlin
Van Geest GJ, Coops H, Roijackers RMM, Buijse AD, Scheffer M (2005) Succession of aquatic vegetation driven by reduced water-level fluctuations in floodplain lakes. J Appl Ecol 42:251–260
Villéger S, Mason NWH, Mouillot D (2008) New multidimensional functional diversity indices for a multifaceted framework in functional ecology. Ecology 89:2290–2301
Westoby M (1998) A leaf-height-seed (LHS) plant ecology strategy scheme. Plant Soil 199:213–227
Wezel A, Arthaud F, Dufloux C, Renoud F, Vallod D, Robin J, Sarrazin B (2011) Land use, water and sediment parameters and inter-annual variations in the Dombes shallow lake agroecosystem, France. Submitted
Willby NJ, Abernethy VJ, Demars BOL (2000) Attribute-based classification of European hydrophytes and its relationship to habitat utilization. Freshw Biol 43:43–74
Williams DD (2005) The biology of temporary waters. Oxford University Press, New York
Wilson JB, Lee WG (2000) C-S-R triangle theory: community-level prediction, tests, evaluation of criticism, and relation to other theories. Oikos 91:77–96