Marianne Cohen

Sorbonne Université | UPMC · Maison de la Recherche

The Green and Blue Infrastructure (GBI) is a new approach for dealing with biodiversity conservation based on maintaining the ecological networks by ensuring the survival of animal and plant species. GBI is considered a new public policy to avoid the loss of biodiversity by preserving landscape connectivity and protecting natural habitats from frag...

This paper contributes to a critical re-reading of the notion of climate services. It does so by problematizing the discontinuity between young people’s commitment to climate change, and the lack of a common vision regarding climate policy among governments. In this essay, youth commitment is characterized in terms of participation in the Global Yo...

Ecological network aims to ensure the survival of animal and plant species. It is considered a new public policy to avoid the loss of biodiversity by persevering the landscape connectivity and natural habitats from fragmentation. This research proposes a methodology that is based on identifying the sub-frames representatives of the study area and t...

Abstract: EVOLUTION, MODELING AND MAPPING OF OLIVE GROVE YIELDS IN THE PROVINCE OF JAEN, SPAIN (1959-2018) Olive growers in Andalusia are concerned about the impact of climate change on their activity, which is very important in terms of surface area, production and income. In an attempt to answer these questions, this work first describes the evo...

Abstract The environmental transition, and more specifically the energy transition, represents today a new challenge for territories and our Planet Earth, to the understanding of which geographers contribute with their analytical tools, and by participating in interdisciplinary research institutions, such as the Institute of Environmental Transitio...

Introduction de l'ouvrage, disponible librement sur le site de Sorbonne Université Presses.

The Tlemcen region is characterized by very diverse and steep areas exposed to gravity hazards, especially in high and medium mountain areas. Tlemcen National Park was chosen for this study, the main objective of which is to map fragile areas in close relation to reduced vegetation cover due to land-use changes and forest fires. Multi-source data w...

RÉSUMÉ.— Alors que les enjeux environnementaux se posent de façon croissante dans les villes, cet article a pour but de documenter et de questionner les politiques de verdissement et de constitution d’une infrastructure verte, dans une ville aride en pleine croissance et marquée par de profondes inégalités. Notre étude associant enquête sociale, re...

ABSTRACT – French biogeography has undergone changes in its approaches over the course of the years, constantly renewing its questions and methods. Crossing several periods during the 20th century, the geographers’ biogeography experienced a true renaissance in the 1960s, marked by the legacy of H. Gaussen, P. Rey (cartography of vegetation and pla...

Ecosystem services (ES) are a key-component for sustainable management of human–environment systems, particularly in polar environments where effects of global changes are stronger. Taking local knowledge into account allows the valuation of ES experienced by stakeholders. It is the case for reindeer herders in Scandinavia, the ungulate being a key...

Urban resilience is a global concern, due to the concomitance of climate change and urbanization process. This is particularly true in Abu Dhabi, a rapid growing city in a coastal desert environment. Green infrastructure is considered a key tool for urban resilience and is promoted by the recent Green Abu Dhabi Infrastructure policy. GADI has vario...

Occurrence of trace elements/metals in arctic soils comparing concentrations and soil geochemical features (bulk fraction, extractable fraction, organic matter) of Toolik (Alaska USA) and Abisko (Norrbotten, Sweden).

- Defining ecosystem services applied to subarctic and reindeer herding areas - Applying some of them to north saami language - Defining land cover catogories using Landsat imageries - Seeing the diachronic evolution through 1990-2006-2017 years, for both land covers and derived ecosystem services

Artic and subarctic environments are particularly sensitive to climate change with a faster warming compared to other latitudes. Vegetation is changing but its role on the biogeochemical cycling is poorly understood. In this study, we evaluated the distribution of trace elements in subarctic soils from different land covers at Abisko, northern Swed...

Geotourism is a useful way to educate societies in the field of geomorphology and related natural hazards. Geosites, including geomorphosites, represent the basis for the development of this type of tourism. This study describes twelve representative gully regions within nine European countries. The characteristics of 42 permanent gullies, gully sy...

This presentation tried to figure out how biodiversity and associated concepts in conservation ecology (ecosystemic services) could be "translated" and understood by saami linguistic. After defining some concepts and how litterature deal with it in the Saami' reindeer herders concept, the presentation listed major ecological terminologies especiall...

This presentation, held at the session 5 of the Climate and Impacts Conference (Paris-Orsay, name of the session: Current and past variabilities of high-latitude climates) dealt with trace elements quantification at different trophic levels (UMR Métis) in a subarctic area (Abisko, Sweden, Envexx project SU). After having sampled soils and made vege...

Poster briefly presenting the TRAC3S project: climate change and quantification of trace elements in different trophic levels in subarctic ecosystem (Abisko, Sweden)

The poster was a chance to quantify evolution of 3 NDVI thresholds, reflecting hypothetically different vegetal formations/densities. Using Landsat TM and OLI/TIRS sensors, I compared in a diachronic analysis extents between three dates (2000, 2006 and 2015). The evolution has been linked with the current rainsing of temperatures at different month...

International guidelines recommend the integration of local communities within protected areas management as a means to improve conservation efforts. However, local management plans rarely consider communities knowledge about wildlife and their traditions to promote biodiversity conservation. In the Sebitoli area of Kibale National Park, Uganda, th...

More than others, arctic ecosystems are affected by consequences of global climate changes. The herbivorous plays numerous roles both in Scandinavian natural and cultural landscapes (Forbes et al., 2007). Wild reindeer (Rangifer tarandus L.) herds in Hardangervidda plateau (Norway) constitute one of the isolated populations along Fennoscandia mount...

Geography, bioclimatological variability, wild reindeer, telemetry, time series in climatology and ecology

In the context of climate change, concern is raising about the negative effects of some pruning waste management practices. On the one hand, burning of pruning residue is seen as controversial regarding its contribution to greenhouse gas emissions. On the other hand, chipping the wood and using it as mulch is seen as highly risky regarding pest and...

Geotourism is a useful way to educate societies in the field of geomorphology and related natural hazards. Geosites, including geomorphosites, represent the basis for the development of this type of tourism. This study describes 12 representative gully regions within nine European countries. The characteristics of 42 permanent gullies, gully system...

More than others, arctic ecosystems are affected by consequences of global climate changes. The herbivorous plays numerous roles both in Scandinavian natural and cultural landscapes (Forbes et al., 2007). Wild reindeer (Rangifer tarandus L.) herds in Hardangervidda plateau (Norway) constitute one of the isolated populations along Fennoscandia mount...

The price volatility of fossil resources, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation lead to the need of an energy transition enabling the development and utilization of other alternative and sustainable resources. Acknowledging that indirect land-use change can inc...

Biodiversity conservation raises many questions about how humans organize themselves and coexist with nature. Our previous research focused on natural and anthropogenic factors influencing chimpanzees’ distribution in a protected tropical forest (National Park) whilst surrounded by a high-density human population. This work seeks to understand how...

La séance de l’AGF organisée à Paris le 21 novembre 2015 par Marianne Cohen, Stéphane Desruelles, Christian Giusti, Delphine Gramond et Denis Mercier (ENeC, UMR 8185 CNRS) avec l’appui de l’opération « Demain le climat » (Sorbonne-Universités), était destinée à faire se rencontrer à l’interface CTE (Climats, Territoires, Environnements) des cherche...

L’enseignement de la géographie et de l’aménagement renvoie à l’espace, d’un point de vue général et théorique mais aussi de façon plus spécifique, appuyé sur des espaces singuliers. Dans cette perspective la mobilisation d’exemples ou d’études de cas semble incontournable dans les pratiques pédagogiques de l’enseignement en géographie. Cette repré...

Geography and Urban planning teaching is focused on space in a general and theoretical point of view but it also deals with specific places. Using examples or case studies to teach geography or urban planning seems to be natural. This fact is largely based on a disciplinary legacy for which empirical geography is built around regional case studies....

The volatility of fossil resources prices, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation, lead to the imperative of the energy transition, development and use of other alternative and sustainable resources. In Europe, established feedstocks for ethanol and biodiesel ha...

The volatility of fossil resources prices, the uncertainty of their long-term availability and the environmental, climatic and societal problems posed by their operation, lead to the imperative of the energy transition, development and use of other alternative and sustainable resources. In Europe, established feedstocks for ethanol and biodiesel ha...

A species, especially when it is endangered and surrounded by anthropogenic elements, can be threatened by habitat fragmentation. Food resource availability in the species' usual or surrogate habitats may reinforce or decrease its use of certain areas. Our objective was to to determine the influence of natural and anthropogenic variables on spatial...

URL: http://authors.elsevier.com/a/1RQM7_3qJ8EsiT In a context of agricultural intensification and increasing urbanization, the biodiversity of farmed landscapes is a key to improve the sustainability of agro-ecosystems. We seek to ascertain the plant biodiversity of farmed and abandoned vineyards and olive-groves and to identify the factors underl...

Two main objectives were developped in this presentation. Firstly I wanted to characterize, within the last decades, the phenological onset of different reindeer pastures/ecological habitats: do they tend to start sooner since 2000 until 2015? Secondly, I wanted to explain those first results using atmosperic (NAO, EATL, SCAND anomalies) and climat...

Landscape influences fauna movement at different levels, from habitat selection to choices of movements’ direction. Our goal is to provide a development frame in order to test simulation functions for animal’s movement. We describe our approach for such simulations and we compare two types of functions to calculate trajectories. To do so, we first...

Abstract – To better understand the climate system in Lapland and impacts of climate change on traditional reindeer husbandry, we crossed time series of atmospheric circulation indexes with climate data from nearby districts where demographic changes of herds are informed. For 1950-2013, increasing occurrence of the winter NAO is observed from 1981...

In a context of agricultural intensification and increasing urbanization, the biodiversity of farmed landscapes is a key to improve the sustainability of agro-ecosystems. We seek to ascertain the plant biodiversity of farmed and abandoned vineyards and olive-groves and to identify the factors underlying it: natural and cultural; on local, landscape...

El olivar rEgado dE SiErra Mágina frEntE al dESafío dEl caMbio cliMático ReSUMeN Se estudió el cambio climático y sus consecuencias para los recursos hídricos, que son actualmente por parte super explorados y al mismo tiempo indispensables para el regadío del olivar. Modelizamos las relaciones entre el rendimiento y el clima para el olivar en secan...

This presentation modelized influence of atmospheric circulation on Swedish Lapland averaged temperatures in winter. I wanted to know better the links between NAO and T°C in winter, and see if according to Saami herders' perception of "good" and "bad" years for reindeers (source: Roué, Roturier, 2014) we could find quoted years as under-, or over-e...

Résumé : Les politiques de conservation, dans leur conception traditionnelle voire spirituelle d’une nature sauvage coupée et préservée du monde des hommes créent parfois des disjonctions spatiales entre les éléments « naturels » et les éléments anthropisés. Après le constat d’échec des politiques autoritaires de protection de la nature, plusieurs...

The adaptability of olive-growing systems to climate change is studied in the Sierra Mágina region (Andalusia) using an interdisciplinary approach that evaluates and makes associations across climate, water resources, and socioeconomic strategies. First, the evolution of rainfall and temperature during the twenty-first century is assessed at the lo...

The adaptability of olive growing systems to climate change is studied in the Sierra Mágina region (Andalusia) using an interdisciplinary approach that evaluates and makes associations across climate, water resources and socio-economic strategies. First, the evolution of rainfall and temperature during the 21st 16 century is assessed at the local s...

The adaptability of olive-growing systems to climate change is studied in the Sierra Magina region (Andalusia) using an interdisciplinary approach that evaluates and makes associations across climate, water resources, and socioeconomic strategies. First, the evolution of rainfall and temperature during the twenty-first century is assessed at the lo...

This research focuses on the adaptability of olive-growing systems to climate change in the Sierra Mágina region of Andalusia. The authors combined a retrospective and prospective analysis, an interdisciplinary approach, collaboration among climatologists, geographers, and sociologists, and the participation of local farmers and stakeholders, all c...

Landscape patterns and chimpanzee (Pan troglodytes schweinfurthii) densities in Kibale National Park show important variation among communities that are geographically close to one another (from 1.5 to 5.1 chimpanzees/km2). Anthropogenic activities inside the park (past logging activities, current encroachment) and outside its limits (food and cash...