F. Archaux, F. Gosselin, and L. Bergès, Effects of sampling time, species richness 330 and observer on the exhaustiveness of plant censuses, J. Veg. Sci, vol.17, pp.299-306, 2006.

M. Bissardon, L. Guibal, and J. Rameau, , 1997.

G. Rural, des Eaux et des Forêts

, Muséum national 334 d'Histoire naturelle, Conservatoire botanique national du Bassin parisien (CBNBP), 2008.

, Convention on Biological Diversity in Rio, 1992.

S. R. De-solla, L. J. Shirose, K. J. Fernie, G. C. Barrett, C. S. Brousseau et al., , p.338, 2005.

, Effect of sampling effort and species detectability on volunteer based anuran 339 monitoring programs, Biol. Conserv, vol.121, pp.585-594

I. Estevez and M. C. Christman, Analysis of the movement and use of space of 341 animals in confinement: The effect of sampling effort, Appl. Anim. Behav. Sci, vol.342, pp.221-240, 2006.

L. G. Firbank, C. J. Barr, and R. Bunce, Assessing stock and change in land 344 cover and biodiversity in GB: an introduction to Countryside Survey, 2000.

, Environ. Manage, vol.67, pp.207-218

, Global Biodiversity Information Facility, 2008.

R. Haines-young, C. J. Barr, and L. G. Firbank, Changing landscapes, habitats 348 and vegetation diversity across Great Britain, J. Environ. Manage, vol.67, pp.267-281, 2003.

R. H. Haines-young, C. J. Barr, and H. Black, Accounting for nature: assessing 350 habitats in the UK countryside, 2000.

U. Hintermann, D. Weber, A. Zangger, and J. Schmill, Biodiversity Monitoring in, p.352, 2002.

. Switzerland, Swiss Agency for the Environment, Forests 353 and Landscape SAEFL

, IAURIF 2003. Institute for Planning and Development of the, p.355

, National Institute for Statistics and Economic Studies, 2006.

R. Julliard, F. Jiguet, and D. Couvet, Common birds facing global changes: what 358 makes a species at risk? Glob, Change Biol, vol.10, pp.148-154, 2003.

R. M. May, The future of biological diversity in a crowded world, Current Science, vol.360, pp.1325-1331, 2002.

J. Metcalfe-smith, D. Maio, J. Staton, S. Mackie, and G. , Effect of sampling effort on 362 the efficiency of the timed search method for sampling freshwater mussel 363 communities, J. N. Am. Benthol. Soc, vol.19, pp.725-732, 2000.

A. Muratet, E. Porcher, and V. Devictor, Evaluation of floristic diversity in urban 365 areas as a basis for habitat management, Applied Vegetation Science, vol.11, pp.451-460, 2008.

S. E. Newson, R. Woodburn, D. G. Noble, and S. R. Baillie, Evaluating the Breeding Bird, vol.367, 2005.

, Survey for producing national population size and density estimates, Bird Study, vol.52, issue.1, pp.42-54

M. Plattner, S. Birrer, and D. Weber, Data quality in monitoring plant species richness 370 in Switzerland, Community Ecology, vol.5, pp.135-143, 2004.

R. Development and C. Team, R: A language and environment for statistical 372 computing. R Foundation for Statistical Computing, 2007.

E. Rexstad and K. Burnham, User's guide for interactive program CAPTURE, 1991.

D. M. Richardson, P. Py?ek, M. Rejmánek, M. G. Barbour, D. Panetta et al., , p.376, 2000.

, Naturalization and invasion of alien plants: concepts and definitions, Diversity & 377 Distributions, vol.6, pp.93-107

N. Salafsky, R. Margoluis, K. H. Redford, and J. G. Robinson, Improving the Practice 379 of Conservation: a Conceptual Framework and Research Agenda for 380, 2002.

, Conservation Science. Conserv. Biol, vol.16, pp.1469-1479

J. R. Sauer, J. E. Hines, G. Gough, I. Thomas, and B. G. Peterjohn, , 1997.

, Breeding Bird Survey Results and Analysis. Version 96.4. Patuxent Wildlife 383 Research Center

B. Walther and J. Martin, Species richness estimation of bird communities: how 385 to control for sampling effort, Ibis, vol.143, pp.413-419, 2001.

D. Weber, U. Hintermann, and A. Zangger, Scale and trends in species richness: 387 considerations for monitoring biological diversity for political purposes, 2004.

. Ecol and . Biogeogr, , vol.13, pp.97-104

B. Worm and J. E. Duffy, Biodiversity, productivity and stability in real food webs, 2003.

, Trends in Ecology & Evolution, vol.18, issue.12, pp.628-632