GIP ECOFOR

Paris, France

GIP ECOFOR

Paris, France
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Proisy C.,Montpellier University | Proisy C.,French Institute of Pondicherry | Viennois G.,Montpellier University | Sidik F.,The Agency for Marine and Fisheries Research | And 16 more authors.
Marine Pollution Bulletin | Year: 2017

Revegetation of abandoned aquaculture regions should be a priority for any integrated coastal zone management (ICZM). This paper examines the potential of a matchless time series of 20 very high spatial resolution (VHSR) optical satellite images acquired for mapping trends in the evolution of mangrove forests from 2001 to 2015 in an estuary fragmented into aquaculture ponds. Evolution of mangrove extent was quantified through robust multitemporal analysis based on supervised image classification. Results indicated that mangroves are expanding inside and outside ponds and over pond dykes. However, the yearly expansion rate of vegetation cover greatly varied between replanted ponds. Ground truthing showed that only Rhizophora species had been planted, whereas natural mangroves consist of Avicennia and Sonneratia species. In addition, the dense Rhizophora plantations present very low regeneration capabilities compared with natural mangroves. Time series of VHSR images provide comprehensive and intuitive level of information for the support of ICZM. © 2017 Elsevier Ltd.


Eglin T.,ADEME | Miriam B.,ADEME | Martin M.,French National Institute for Agricultural Research | Maurice D.,University of Lorraine | And 3 more authors.
Revue Forestiere Francaise | Year: 2014

Forest managers and decision-makers require more knowledge of forest soils and better references for understanding soil functioning. At REGEFOR 2013, the “Collecting and using data on forest soils” workshop identified a large under-exploited source of data in development organizations and research laboratories. Software was available for making these resources easier to discover and accessible via Internet. As the data is scattered and the data sets are not harmonized, much remains to be done to enable this data to be used (eg: incorporation into databases, production of metadata and common semantic standards, clarification of ownership rights, data transfer protocols between applications). The workshop also discussed ways of improving coordination between the production and management of data, in particular considering the advantages and limitations of centralization within a single information system. © 2014 AgroParisTech.


Eglin T.,French Environment and Energy Management Agency | Martin M.,French National Institute for Agricultural Research | Maurice D.,University of Lorraine | Nicolas M.,OFFICE NATIONAL DES FORETS | And 3 more authors.
Revue Forestiere Francaise | Year: 2014

Forest managers and decision-makers require more knowledge of forest soils and better references for understanding soil functioning. At REGEFOR 2013, the “Collecting and using data on forest soils” workshop identified a large under-exploited source of data in development organizations and research laboratories. Software was available for making these resources easier to discover and accessible via Internet. As the data is scattered and the data sets are not harmonized, much remains to be done to enable this data to be used (eg: incorporation into databases, production of metadata and common semantic standards, clarification of ownership rights, data transfer protocols between applications). The workshop also discussed ways of improving coordination between the production and management of data, in particular considering the advantages and limitations of centralization within a single information system. © AgroParisTech, 2014.


Landmann G.,GIP Ecofor | Augusto L.,French National Institute for Agricultural Research | Cabral A.S.,GIP Ecofor | Saint-Andre L.,French National Institute for Agricultural Research
Revue Forestiere Francaise | Year: 2014

silvicultural itineraries and sustainability of soils workshop was chaired by Guy Landmann (ECOFOR) and Laurent Augusto (INRA), and Anne Sophie Cabral (ECOFOR) acted as secretary. Laurent Augusto (INRA) presented the current state of knowledge on the relationship between forest management policies and the maintenance of soil fertility based on the results of the RESOBIO project which studied the management of harvesting residues and the preservation of soils and biodiversity. Laurent Saint-André (INRA) gave a special presentation on the management of forests in tropical regions. Laurent Saint-André described the case of tropical industrial plantations, in an experimental network set up by CIFOR, as an extreme example of the relationship between intensive harvesting and drop in productivity. In these experiments, stands of fast-growing trees were subjected to very different treatments, including removing the whole tree and laying bare the soil which corresponded to a practice that was still current in certain tropical ecosystems. The workshop ended with an unusual final discussion, as those involved in research and development were invited to comment on the probable time it would take to resolve the main problems remaining.


Davi H.,French National Institute for Agricultural Research | Cailleret M.,ETH Zurich | Restoux G.,Agro ParisTech | Restoux G.,French National Institute for Agricultural Research | And 3 more authors.
Ecosphere | Year: 2016

Seed production is a strong indicator of plant fitness and plays a major role in population dynamics. However, the environmental and endogenous factors driving seed production are still poorly described and are ofen hard to disentangle. Consequently, we combined principal components analysis and mixedeffects linear models that can consider the multicollinearity of the explanatory variables and quantify their respective influence on the spatio-temporal variability in reproduction. We applied this method to analyze the relationships between cone production in Abies alba Mill. trees (6829 individual reports of cone production). We estimated the relationships between cone production and climate, elevation, tree size (diameter and height), age, crown defoliation rate, and past radial growth. We found that the distribution of annual cone production was highly skewed; 21% of the trees did not produce any cones, whereas 3.7% produced more than 100 cones in a single year. Among the endogenous factors, tree size explained 57% of the variation in cone production with large trees being the most productive. Low radial growth rates in previous years were mostly associated with higher cone production (14% of the variation), while elevation and crown defoliation had non-monotonic effects on reproduction. Finally, years of high cone production were strongly correlated with the difference between the April temperatures of the two previous years and were also associated with a dry spring 2 yr prior to cone production followed by a humid spring the previous year. These results highlight the complexity of the abiotic and biotic factors involved in reproduction and their respective and interactive influence on the interannual and interindividual variability in cone production. © 2016 Davi et al.


Gardiner B.,Japan Forestry and Forest Products Research Institute | Marzano M.,Japan Forestry and Forest Products Research Institute | Nicoll B.,Japan Forestry and Forest Products Research Institute | Blennow K.,Swedish University of Agricultural Sciences | And 12 more authors.
EFI News | Year: 2011

Storms are one of the major damaging agents in Europe's forests. Sharing best practice, facilitating a rapid response following storms and building on adaptive forest management strategies are measures that can mitigate the impacts of storms. Storms can have a major impact on timber prices in the short term and on timber availability in the longer term. They also affect water quality, carbon sequestration and biodiversity. The dominant factors which determine damage levels within forests and stands are tree height, soil condition and recent thinning. Research suggests that forest storm damage will continue to increase in Europe, with damage increasing by between 2 to 4 times the present levels by the end of the century, if current management practices continue. A range of practice and policy measures are recommended to help mitigate the effects of storms on the European forest industry and forest owners and to prepare for future storm events.


Gosselin M.,IRSTEA | Archaux F.,IRSTEA | Bonheme I.,GIP ECOFOR | Nivet C.,GIP ECOFOR
Revue Forestiere Francaise | Year: 2012

Under the Forest Europe process initiated in 1993 in Helsinki at the second Ministerial Conference on the Protection of Forests in Europe, since 1995, France has published sustainable management indicators for forests in metropolitan France every five years. These indicators under criterion 4 focus on biodiversity and deal with thematic areas ranging from the diversity of species to threatened forest species, protected forests, naturality, etc., all the way to the fragmentation of the landscape. Using the outcomes of the scientific consultations launched in 2006 by GIP Ecofor on the topic of forest biodiversity indicators, we provide a tentative method for structuring tracking of forest biodiversity: identification of goals by category of user, field of biodiversity to be tracked, scales used, scientific significance and validity and continual improvement of indicators. The authors then analyse the current indicators under criterion 4 in relation to two main goals: assessing the state and dynamics of forest biodiversity and evaluating the effect of forest policies and silvicultural practises (which derive in part from those policies) on biodiversity. The current system already provides considerable data but needs improvement. As the situation stands, indicators under criterion 4 are not adequate either for tracking the state of forest biodiversity and the pressure to which it is subjected or for guiding the policies that impact it. We offer areas for improvement so as to more fully reflect the various taxonomic, genetic, functional and ecosystemic components of forest biodiversity, placing the emphasis on the most important stakes in terms of ecology and policy. For the monitoring system to become a true policy support tool, we argue in favour of a system structure that follows a pressure-state-response (PSR) framework, making sure that triplets balance of the PSR system indicators is maintained for each ecological or political stake identified. © AgroParisTech, 2013.

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