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Les articles de Christian Perennou
de Imene Benzina, Abdelkrim Si Bachir, Abdelkrim Arar, Anis Guelmami, Christian Perennou
In Present environment and sustainable development, 18(1) (2024)
En ligne : www.pesd.ro[...]
Wetlands are present within intricate ecological settings, exhibiting dynamic changes over time and across different areas with regard to their functional and structural diversity. Several approaches have been introduced for ecosystem analysis and management since 1990s, where Driver – Pressure – State – Impact – Response (DPSIR) framework is one of the widely used approaches for assessing and managing environmental problems. In this study, we proposed a DPSIR framework as a model in the Sebkhates of Aures wetland complex (SAWC, Northeast of Algeria), in order to create a regional wetland observatory to deliver ecosystem services within current state of changes resulted from socioeconomic drivers. DPSIR facilitates the identification of essential indicators to detect threats to the Sebkahtes of Aures wetlands complex (SAWC), influencing policymakers to enhance the protection and management of these wetlands. In line with the established DPSIR framework. This same approach and methodology could be applied to the other 15 wetlands complexes known in Algeria, culminating in the creation of a national wetland observatory. Furthermore, DPSIR can be employed as an analytical tool for policy making in the context of sustainable management of wetland ecosystems and can serve as a model in the establishment and development of various observatory programs in Algeria.Waterbird diversity at the Sebkhet of Aures wetlands complex, North East Algeria
de Imene Benzina, Abdelkrim Si Bachir, Christian Perennou
In Ornithologische Beobachter (Der), 119(4) (December, 2022), 318-329
We collected a database on wintering waterbirds in the Sebkhet of Aures wetlands complex (SAWC), based on surveys during the period 1978–2019 as well as on a bibliographic search of theses, dissertations, and other reports. The main data are from 12 Ramsar wetlands within the SAWC. We found 57 waterbird species from 9 orders and 14 families. The most abundant species were Greater Flamingo, Pied Avocet, Common Crane, and several anatidae. The Gareat El Taref wetland hosted the high- est waterbird diversity, with 31 species and a Shannon index H’ = 3.30. The lowest waterbird diversity was found in Chott Tinsilt (8 species, H’ = 1.56). 77% of the waterbird species were winter guests. Out of 12 biogeographical regions, species classified as Palearctic were the most common (41% of species). Out of six trophic categories, polyphagous species were the most common (44%). Among the 57 species, 21 are protected at a national level. According to the IUCN Red List, 48 species are of «least concern», whereas the Slender-billed Curlew is classified as «critically endangered» species; the White-headed Duck is «endangered»; three species are considered «vulnerable» (Marbled Teal, Common Pochard, Audouin’s Gull); and four species are considered «near threatened» (Northern Lapwing, Red Knot, Black-tailed Godwit, Eurasian Curlew). The collected data should be used as a basis for the conservation of key species and of sites of great ornithological value.
de Mauro Fois, Alba Cuena Lombraña, N Araç, M Artufel, E Atak, V Attard, Gianluigi Bacchetta, Salvatore Cambria, K Charfi, D Dizdaroğlu, et al.
In Flora Mediterranea, 32 (12/2022), 339-349
En ligne : www.herbmedit.org[...]
MedIsWet (Conservation of the island wetlands of the Mediterranean Basin) is a MAVA funded project which aims at investigating all seasonal or permanent island wetlands both natural and artificial, with a minimum extent of 0.1 hectares. More than 16,000 wetlands from almost all the Mediterranean, including islands from France, Italy, Malta, Croatia, Cyprus, Tunisia, Turkey, Greece and Spain were mapped. Over 2,500 of them were inventoried in the field and more than 500 scientific contributions catalogued. In total, more than 35,000 plant occurrences were uploaded, in a standardised and comparable way, on the national open-source web portals. These can be related to the recorded threats, uses and other spatially retrievable information. Here, we show strengths and shortfalls of the already available information about the floristic records. Although further improvements are needed, we discuss how these data can be used for research and policy actions and to develop conservation projects.
Key words: databases, floristic records, field surveys, rapid assessment, hydro-hygrophilous vegetation.
de Nadège Popoff, Elie Gaget, Arnaud Béchet, Laura Dami, Pierre Defos Du Rau, Ilse Geijzendorffer, Anis Guelmami, Jean-Yves Mondain-Monval, Christian Perennou, Marie Suet, et al.
In Biodiversity and conservation, 30 (July, 2021), 19
En ligne : link.springer.com[...]
The Mediterranean Basin is a biodiversity hotspot. Wetlands make a key contribution to this status, but many of them remain outside the Ramsar network fifty years after the establishment of the Ramsar Convention. Here we evaluate the extent to which the Mediterranean Ramsar network covers wetlands of international importance for wintering waterbirds using the Ramsar Convention criteria 2 (species of conservation concern), 5 (> 20,000 waterbirds) and 6 (1% of a population). These criteria were applied to 4186 sites in 24 Mediterranean countries using counts of 145 wintering waterbird species from 1991 to 2017. We identified 161 sites of international importance for waterbirds that have not yet been declared as Ramsar sites, which could be added to the 180 current Mediterranean Ramsar sites established based on waterbird criteria (criteria 5 and/or 6). Among these sites, a subset of 32 very important sites reached double the required level for at least one criterion and 95 were not protected by any site conservation status. Coastal wetlands represented half of the Ramsar gap for waterbirds. We identified that an additional 1218 monitored sites could be provisionally considered as internationally important and thus require more survey efforts to assess their status. This study highlights a lack of participation of the Mediterranean countries to build the Ramsar network for wetland protection. Our results should help policymakers and managers to prioritize future Ramsar site designation, notably in the Middle East and Western European region where important gaps were identified.
de Daniel Morant, Christian Perennou, Antonio Camacho
In Applied Sciences, 11(4) (February, 2021), 23
En ligne : www.mdpi.com[...]
The features of lentic waterbodies largely depend on the surrounding environment. Mediterranean coastal lagoons have been historically altered, with their catchment being highly modified for agricultural, livestock, or urban uses. Changes in land uses induce pressures that impact the waterbodies and alter their ecological status. The objectives of this paper were: to develop a methodological approach (LUPLES: Land Uses for estimating Pressure Levels to approach the Ecological Status), to quantify the main pressures on the waterbodies and to forecast the possible impacts of these pressures on their ecological status. Corine-Land Cover maps and Geographic Information System technics were used to delineate and identify land uses in the catchments. Specific algorithms were created to quantify the main pressures from land uses in the catchment and hydro-morphological alterations in the immediate basin. The values of the estimated pressure levels were correlated with ecological status indicators using metrics developed for the European Water Framework Directive. Data were obtained from European and River Basin Authorities databases. Results showed statistically significant correlations between the pressure levels quantified by the LUPLES method and the impact level detected by biological, physical and chemical metrics. This method provides a useful approach to estimate the pressure levels affecting lentic waterbodies and could be applied to approach how they could affect their ecological status.
de Elie Gaget, Thomas Galewski, Frédéric Jiguet, Anis Guelmami, Christian Perennou, Coralie Beltrame, Isabelle Le Viol
In Conservation Biology, 34(4) (August, 2020)
En ligne : conbio.onlinelibrary.wiley.com[...]
While the impacts of climate and land use changes on biodiversity have been widely documented, their joint effects remain poorly understood. We evaluated how non-breeding waterbird communities adjust to climate warming along a gradient of land use change. Using mid-winter waterbird counts (132 species) at 164 major non-breeding sites in 22 Mediterranean countries, we assessed the changes in species composition during 1991–2010, regarding thermal niche position and breadth, in response to regional and local winter temperature anomalies and to natural habitat conversion. We showed that in response to the temperature increase, communities became relatively richer in warm-dwelling species, but less where natural habitat conversion occurred. At the sites affected by natural habitat conversion, the overall species richness decreased with time, while the abundance relatively increased for the species with a broader thermal niche, independently of their thermal affinities. The strong negative relationship between natural habitat conversion and community adjustment to temperature increases suggests an antagonistic interaction between climate warming and habitat change. Indeed, we found no evidence of community adjustment to climate warming when natural habitat conversion was higher than 5% over 15 years. These results underline the importance of habitat conservation in community adjustment to climate warming. Article impact statement: Waterbird communities do not adjustment to climate warming when natural habitat conversion is >5% over 15 years. This article is protected by copyright. All rights reservedL’état des zones humides dans le monde et en Méditerranée
de Christian Perennou, Laurent Chazee, Thomas Galewski, Ilse Geijzendorffer, Anis Guelmami
In Zones Humides Infos, 97-98 (Eté 2019), 20-21A More Effective Ramsar Convention for the Conservation of Mediterranean Wetlands
de Ilse R. Geijzendorffer, Coralie Beltrame, Laurent Chazee, Elie Gaget, Thomas Galewski, Anis Guelmami, Christian Perennou, Nadège Popoff, Carlos A. Guerra, Roxanne Leberger, et al.
In Frontiers in Ecology and Evolution, 7 (February, 2019)
En ligne : www.frontiersin.org[...]
The Ramsar Convention is the multilateral agreement aimed at protecting wetlands globally. Wetlands are particularly recognized for their role in the Mediterranean biodiversity hotspot by providing key habitats for endemic and migratory species, directly contributing benefits to the lives of people and being an integral part of their culture. In response to this importance, the Mediterranean Wetlands Observatory publishes Mediterranean Wetland Outlooks on the state and trends of Mediterranean wetlands; the first edition in 2012 (MWO1) and the second edition in 2018 (MWO2). In this paper, we used the results of the two Mediterranean Wetland Outlooks to highlight ways to increase the impact of the Ramsar Convention by identifying the spatial dimensions of detected biodiversity trends as well as the societal developments and estimated impacts of global change and protection status.Key criteria for developing ecosystem service indicators to inform decision making
de Alexander P. E. van Oudenhoven, Matthias Schröter, Evangelia G. Drakou, Ilse R. Geijzendorffer, Sander Jacobs, Peter M. van Bodegom, Laurent Chazee, Bálint Czúcz, Karsten Grunewald, Ana I. Lillebø, et al.
In Ecological Indicators, 95 (December, 2018), 417-426
En ligne : www.sciencedirect.com[...]
Decision makers are increasingly interested in information from ecosystem services (ES) assessments. Scientists have for long recognised the importance of selecting appropriate indicators. Yet, while the amount and variety of indicators developed by scientists seems to increase continuously, the extent to which the indicators truly inform decision makers is often unknown and questioned. In this viewpoint paper, we reflect and provide guidance on how to develop appropriate ES indicators for informing decision making, building on scientific literature and practical experience collected from researchers involved in seven case studies. We synthesized 16 criteria for ES indicator selection and organized them according to the widely used categories of credibility, salience, legitimacy (CSL). We propose to consider additional criteria related to feasibility (F), as CSL criteria alone often seem to produce indicators which are unachievable in practice. Considering CSLF together requires a combination of scientific knowledge, communication skills, policy and governance insights and on-field experience. In conclusion, we present a checklist to evaluate CSLF of your ES indicators. This checklist helps to detect and mitigate critical shortcomings in an early phase of the development process, and aids the development of effective indicators to inform actual policy decisions.Mapping Mediterranean Wetlands With Remote Sensing: A Good-Looking Map Is Not Always a Good Map
de Christian Perennou, Anis Guelmami, Marc Paganini, Petra Philipson, Brigitte Poulin, Adrian Strauch, Christian Tottrup, John Truckenbrodt, Ilse R. Geijzendorffer, David A. Bohan, et al.
In Advances in Ecological Research, 58(1) (2018), 243-277
En ligne : www.sciencedirect.com[...]
Wetlands are a key habitat within the Mediterranean biodiversity hotspot and provide important ecosystem services for human well-being. Remote sensing (RS) has significantly boosted our ability to monitor changes in Mediterranean wetlands, especially in areas where little information is being collected. However, its application to wetlands has sometimes been flawed with uncertainties and unrecognized errors, to a large extent due to the inherent and specific ecological characteristics of Mediterranean wetlands. We present here an overview of the state of the art on RS techniques for mapping and monitoring Mediterranean wetlands, and the remaining challenges: delineating and separating wetland habitat types; mapping water dynamics inside wetlands; and detecting actual wetland trends over time in a context of high, natural variability. The most important lessons learned are that ecologists’ knowledge need to be integrated with RS expertise to achieve a valuable monitoring approach of these ecosystems.
de Coralie Beltrame, Christian Perennou, Anis Guelmami
In Méditerranée, 125 (2015), 97-111
Les zones humides méditerranéennes dans leur ensemble, écosystèmes de haute valeur pour la biodiversité, ont perdu environ 50 % de leur superficie au cours du xx e siècle. Par ailleurs, le littoral méditerranéen est soumis à de fortes pressions dues à l’urbanisation, au tourisme mais aussi au développement d ’infrastructures industrielles et de transport. Il y a donc dans les zones humides littorales méditerranéennes une convergence d’enjeux écologiques, sociaux et économiques. L’évolution de l’occupation du sol a été caractérisée dans 214 d’entre elles entre 1975 et 2005. En leur sein, la superficie des habitats humides naturels a diminué de 10 % en 30 ans, soit une perte de 1329 km². À l’inverse, les habitats humides d’origine anthropique ont augmenté de 105 %, c’est -à-dire un gain de 854 km². Pendant cette période, la principale pression directe sur les habitats humides naturels a été l’agriculture puisque 71 % des habitats humides perdus l’ont été au profit des milieux agricoles. L’urbanisation a eu un impact direct moindre mais elle a entrainé la conversion des terres agricoles périurbaines, qui se sont report ées vers les habitats naturels périphériques. Mots-clés : Méditerranée, zone humide littorale, SIG, télédétection, artificialisation, occupation du sol, pression agricole, pression urbaine / Overall, Mediterranean wetlands are very important ecosystems for biodiversity. Approximately half their area was lost during the 20 th century. The Mediterranean coast is also under heavy pressure due to urbanization, tourism and development of industrial and transport infrastructures. The Mediterranean coastal wetlands thus represent a convergence point of ecological, human and economic issues. Changes in land cover between 1975 and 2005 were characterized in 214 of them. The area of natural wetland habitats decreased by 10 % in 30 years, i.e. a loss of 1329 km². At the same time, artificial wetland habitats increased by 105 %, i.e. a gain of 854 km². The main direct pressure on natural wetland habitats was agriculture, with 71 % of them converted into agricultural areas. Urbanization had less direct impact but largely affected agricultural areas, which in turn were displaced onto natural habitats.Trends in management plans and guides: 25 years of experience from Southern France
de Lisa Ernoul, Nicolas Beck, Damien Cohez, Christian Perennou, Marc Thibault, Loic Willm, Brigitte Poulin
In Journal of Environmental Planning and Management, 58(6) (June 2015), 1096-1112
En ligne : dx.doi.org[...]
This study analysed 14 management plans and guidelines from a 25-year period to understand trends in conservation planning. A Rosetta Stone Analysis was used for the systematic comparison of plans and guidelines. Management plans incorporated management philosophies, management scenarios, opportunities for infrastructure, and plans for data collection by 2000. As of 2010, they incorporated ecosystem services, stakeholders’ objectives and methods for storing and analysing data. The results demonstrate the complex nature of management plans, with an important workload for site managers. Recommendations for future planning include adjustments in planning timeframes and a better identification of conservation targets from initial stages.Development of an Indicator to Monitor Mediterranean Wetlands (2015)
de A. Sanchez, D. Abdul Malak, Anis Guelmami, Christian Perennou
2015Agriculture, aquaculture et milieux humides : chiffres clés (2014)
de Christian Perennou, E. Thiry, A. A. Messaoud
[S.l.] : Observatoire des zones humides, 2014, 34p ill cartes graphExisting areas and past changes of wetland extent in the Mediterranean region: an overview
de Christian Perennou, C. Beltrame, Anis Guelmami, P. Tomas Vives, Pierre Caessteker
In Ecologia Mediterranea, 38(2) (2012), 53-66
En ligne : ecologia-mediterranea.univ-avignon.fr[...]
de A. Lazli, A. Boumezbeur, Christian Perennou, A. Moali
2011Limiter le nombre des indicateurs. Comment je m'y prends? (2011)
de Christian Perennou
2011Partenaires financiers publics. Où trouver des sous? (2011)
de Christian Perennou
2011
de Christian Perennou, F. Tron, Damien Cohez, Marc Thibault, Anthony Olivier, Michel Gauthier-Clerc, C. Pin, G. Paulus, Yves Kayser, Olivier Pineau, et al.
2008Observation d'un cas d'adoption temporaire chez le vautour percnoptère Neophron percnopterus (2005)
de M. Corsange, Christian Perennou, M. Gallardo
2005La protection de l'érismature à tête blanche Oxyura leucocephala en France (2003)
de Christian Perennou
2003Module de formation: Sensibilisation aux zones humides (1999)
de Christian Perennou, C.H. Pochet, D. Crepin
Arles : Tour du Valat, 1999, non pagModule de formation: Concevoir le suivi des zones humides méditerranéennes (1998)
de Christian Perennou, P. Tomas Vives, Jean Jalbert
Arles : Tour du Valat, 1998, pag mult
de P. Dubois, Christian Perennou
1997
de Christian Perennou
1997Gestion des sites de nidification des oiseaux d'eau coloniaux (1996)
de Christian Perennou, Nicolas Sadoul, Olivier Pineau, Alan R. Johnson, Heinz Hafner
Arles : Tour du Valat, 1996, 114p ill* Conservation des zones humides méditerranéennes 4
En ligne : tourduvalat.org[...]Management of nest sites for colonial waterbirds (1996)
de Christian Perennou, Nicolas Sadoul, Olivier Pineau, Alan R. Johnson, Heinz Hafner
Arles : Tour du Valat, 1996, 114p ill* Conservation of Mediterranean Wetlands 4Module de formation: Plan de gestion d'une zone humide méditerranéenne (1996)
de Christian Perennou, J.L. Lucchesi, P. Gerbeaux, Jean-Emmanuel Roché
Arles : Tour du Valat, 1996, pag mult
de Christian Perennou
Arles : Tour du Valat, 1994, 74pTowards the extinction of the Spot-billed Pelican (Pelecanus philippensis) (1993)
de J. Mangalaraj Johnson, Christian Perennou, Alain Jean Crivelli
1993
