Effort d’échantillonnage et atlas floristiques – exhaustivité des mailles et caractérisation des lacunes dans la connaissance

Vallet, Jeanne; Rambaud, Maëlle; Coquel, Loïc; Poncet, Laurent; Hendoux, Frédéric

doi:10.1016/j.crvi.2012.11.005

Cited by 3 publications

(8 citation statements)

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“…Among the methods used to estimate the species richness of an area starting from presence-absence data, the most appropriate for floristic inventories and atlases is the relation between number of species and sampling effort (Vallet et al 2012). This relation is investigated mainly using non parametric estimators, less sensitive to the sampling effort (Palmer 1990;Brose et al 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Floristic inventories or check lists and atlases are important tools for assessing biodiversity and addressing its conservation (Vallet et al 2012). They are often the result of careful and time-consuming researches conducted in specific geographic units, focused on vascular plants or on smaller taxonomic group such as Orchidaceae, one of the largest and most widespread family of flowering plants (Dressler 1981;WCSPF 2019).…”

Section: Introductionmentioning

confidence: 99%

“…On the contrary, a sampling activity carried over a too long time could detect the species turnover (e.g., for habitat change due to socio-economic or ecological reasons or for climate changing) resulting in an overestimation of the number of species than the existing habitats could theoretically host in a given time. The real floristic richness and its distribution in an area can be estimated with different methods (Gotelli & Colwell 2001;Vallet et al 2012). The most suitable for the kind of data recorded in the field by orchidologists is the use of 'sample based species rarefaction-curves' (Gotelli & Colwell 2001).…”

Section: Introductionmentioning

confidence: 99%

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Estimating the completeness of orchid checklists and atlases: a case study from southern Italy

Croce¹

2022

J. Threat. Taxa

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Checklists and atlases are important tools for knowledge of the biodiversity of a geographic unit. Nevertheless, they often suffer from bias due to preferential sampling. It is important to assess the level of completeness of the data collected during such research to allow comparison of the biodiversity of different areas, or to use them for macroecology, biogeography or conservation purposes. This assessment is not trivial, especially when information from heterogeneous sources is used (e.g., herbaria specimens, field observations, literature data). The author suggests some simple methods to assess the completeness of floristic database and to represent the distribution of the completeness at a scale level appropriate to the size of the studied area or, on another hand, to the precision level of the available data. Such information is useful to direct the surveys identifying less explored areas or habitats and thereby correcting the sampling biases. Adding information about sampling effort or completeness could be very useful to make floristic research more objective.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Estimating the completeness of orchid checklists and atlases: a case study from southern Italy

Croce¹

2022

J. Threat. Taxa

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“…Nevertheless, according to Vallet et al (2012) , it is possible to assess survey completeness of regional floristic inventories despite heterogeneous sources and protocols, through the use of the Jackknife 1, a non-parametric estimator. This estimator was calculated for each 10km by 10km cell of the French map, aiming to mitigate sampling bias as effectively as possible.…”

Section: Methodsmentioning

confidence: 99%

“…The number of records in each cell was used as an estimator of the sampling effort. The ratio between the observed and estimated richness of species measures the completeness of the inventory in each surveyed cell ( Vallet et al 2012 ).…”

Section: Supplementary Materialsmentioning

confidence: 99%

SIFlore, a dataset of geographical distribution of vascular plants covering five centuries of knowledge in France: Results of a collaborative project coordinated by the Federation of the National Botanical Conservatories

Just¹,

Gourvil²,

Millet³

et al. 2015

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More than 20 years ago, the (MNHNFrench Muséum National d’Histoire Naturelle1 , Secretariat of the Fauna and Flora) published the first part of an atlas of the flora of France at a 20km spatial resolution, accounting for 645 taxa (Dupont 1990). Since then, at the national level, there has not been any work on this scale relating to flora distribution, despite the obvious need for a better understanding. In 2011, in response to this need, the (FCBNFederation des Conservatoires Botaniques Nationaux2 , http://www.fcbn.fr) launched an ambitious collaborative project involving eleven national botanical conservatories of France. The project aims to establish a formal procedure and standardized system for data hosting, aggregation and publication for four areas: flora, fungi, vegetation and habitats. In 2014, the first phase of the project led to the development of the national flora dataset: SIFlore. As it includes about 21 million records of flora occurrences, this is currently the most comprehensive dataset on the distribution of vascular plants (Tracheophyta) in the French territory. SIFlore contains information for about 15'454 plant taxa occurrences (indigenous and alien taxa) in metropolitan France and Reunion Island, from 1545 until 2014. The data records were originally collated from inventories, checklists, literature and herbarium records. SIFlore was developed by assembling flora datasets from the regional to the national level. At the regional level, source records are managed by the national botanical conservatories that are responsible for flora data collection and validation.In order to present our results, a geoportal was developed by the Fédération des conservatoires botaniques nationaux that allows the SIFlore dataset to be publically viewed. This portal is available at: http://siflore.fcbn.fr. As the FCBN belongs to the (SINP)Information System for Nature and Landscapes’ , a governmental program, the dataset is also accessible through the websites of the National Inventory of Natural Heritage (http://www.inpn.fr) and the Global Biodiversity Information Facility (http://www.gbif.fr). SIFlore is regularly updated with additional data records. It is also planned to expand the scope of the dataset to include information about taxon biology, phenology, ecology, chorology, frequency, conservation status and seed banks.A map showing an estimation of the dataset completeness (based on Jackknife 1 estimator) is presented and included as a numerical appendix.Purpose:SIFlore aims to make the data of the flora of France available at the national level for conservation, policy management and scientific research. Such a dataset will provide enough information to allow for macro-ecological reviews of species distribution patterns and, coupled with climatic or topographic datasets, the identification of determinants of these patterns. This dataset can be considered as the primary indicator of the current state of knowledge of flora distribution across France. At a policy level, and in the context of global warming, ...

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Chapitre 11. Identification des zones importantes de conservation de la biodiversité au Burundi

Ndayishimiye¹,

Ngendakumana²,

Hitimana³

et al. 2022

Biodiversité Des écosystèmes Intertropicaux

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Effort d’échantillonnage et atlas floristiques – exhaustivité des mailles et caractérisation des lacunes dans la connaissance

Cited by 3 publications

References 28 publications

Estimating the completeness of orchid checklists and atlases: a case study from southern Italy

Estimating the completeness of orchid checklists and atlases: a case study from southern Italy

SIFlore, a dataset of geographical distribution of vascular plants covering five centuries of knowledge in France: Results of a collaborative project coordinated by the Federation of the National Botanical Conservatories

Chapitre 11. Identification des zones importantes de conservation de la biodiversité au Burundi

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