Guyadiv is a network of permanent forest plots in French Guiana. The experimental site of Piste de St Elie is composed of one 10-ha plot (100 m x 1000 m), an adjacent 2-ha plot (100 m x 200 m), and three distant plots: a 5-ha (100 m x 500 m) and two 1-ha (19 ha total area). These plots are located in the ECEREX area of Piste Saint Elie. The botanists who have set-up the plots and contributed to identification and tree measurements are D. Sabatier, M.-F. Prévost, J.-F. Molino, B. Riéra, E. Fonty and C. Madelaine. During the inventories, the data recorded are: geographical position of the trees, dbh and identification by botanical sampling. On all 19 plots, all trees above10 cm dbh were censused. On a 1-ha plot (20 m x 500 m) nested within the 10-ha plot, all trees above 2 cm dbh were also censused. The first year of inventory of trees with dbh >= 10 cm was 1986, 1987, 1988 or 1991 (depending on the plots), and 1994 for trees with dbh between 2 and 10 cm. A second inventory was conducted in 2003 on the 10-ha plot (including trees with dbh between 2 and 10 cm) and the two distant 1-ha plots.

Guyadiv is a network of permanent forest plots installed over the years in French Guiana. In these plots, all trees above 10 cm dbh are identified, measured and mapped. Several plots are part of permanent research stations (Paracou, Nouragues, Piste Saint Elie). The diversity of arborescent species flora is studied (floristic list). This flora diversity depends on the forest vegetation (architecture, structure, biomass, dynamic in the long term, dynamic after perturbation and biogeography) which is also studied. The contribution of flora diversity to forest vegetation (carbon cycle issue...) is another topic approach in the studies. Analyses are conducted at different spatial scales (local - intra site, regional, subcontinental via ATDN network) and temporal scale (impact of logging, impact of old settlements : COUAC project). We only have the point coordinates and not the precise demarcation for most of the sample plots. In order to calculate the bounding box for these plots, we have expanded the point location between 100 and 600 meters in each direction. Information specific of each site (Paracou, Montagne Plomb, Crique Plomb, Piste Saint Elie, Counami...) is available. Please refer to the attached metadata sheets. This network relies greatly on the IRD Herbier de Guyane (CAY) and its network of international specialists.

Guyadiv is a network of forest inventory plots installed in French Guiana. In Paracou experimental station 2 sets of plots pertain to the Guyadiv network Transects (> 2cm dbh) Ten 20x250m-transects have been inventoried within ten larger experimental plots. In those plots all stems > 2cm dbh have been censused (mapped and identified to species level). Plots were measured twice (once between 1994-1998, and once in 2002) 3 transects in plots subjected to treatment 1 (commercial logging only, of trees of DBH>50cm between 1986 and 1988, on average 10 stems per ha) 3 transects in plots subjected to treatment 2 (commercial logging as treatment 1 + thinning by poison-girdling of all non-commercial species of DBH≥40cm between 1986 and 1988) 3 transects in control plots (without treatments) 1 transect in plots subjected to treatment 3 (commercial logging + logging for fuelwood of all non-commercial treed of DBH between 40 and 50 cm + thinning of trees of more than 50cm DBH between 1986 and 1988) In addition 10 0.5 ha plots within the Guyaflux foot print have been set-up in which all trees > 10cm dbh have been inventoried.

The Paracou Research Station encompasses 5000 ha of tropical rain forest near Sinnamary, French Guiana, and is accessible by paved road. The site includes several types of forest plots, each with unique research objectives. Logging Plots: Fifteen nine-hectare plots (numberred 1 to 15) were established in 1984 to study the impact of different logging treatments on tropical tree population structure. This zone is reserved exclusively for studies investigating the impact of the different logging treatments on forest populations. Primary Forest Plot: A 25 hectare plot (no. 16) was established in 1991 for studies of undisturbed forest. Researchers whose interests are unrelated to the effects of logging treatments are encouraged to conduct their work in this plot. Clearcut Plot: a 6.25 ha plot (no. 17) was established in 1989 at a nearby reserve along the road to St. Elie to study the effects of clearcutting on tropical forest dynamics

Guyafor is a network of permanent forest plots installed in French Guiana. The site of Paracou covers a 130,5ha area. It is composed of 16 plots, managed by CIRAD. 114373 trees are being followed since 1984. 30 campaignes of inventories have been made : every year since 1984.