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This study was performed by Florian EMO at Centre ValBio in 2022, under the direction of P. 
Wright and F. Brotcorne. The Milne-Edwards’ sifaka is a lemur species who live in the 
Southeastern of Madagascar. This species is the mainly seeds disperser in the submountain 
rainforest but is threatened by change climate and habitat disturbance. Many studies are 
interested in this species, to optimize the conservative approach and reduce damage to 
habitats and therefore the food resources, whose threats about it is constantly expanding. In 
this study, we focused on the feeding ecology, especially how the social hierarchy and the 
environment influence the food composition. In this behavioral study, 4 groups of sifakas 
were followed for five-consecutive-day by using continuous sampling. The influence of the 
dominance rank, the sex, the age, the pregnancy, and the site were observed. We also 
observed the influence of the change climate and the habitat disturbance. An influence of the 
sex, the pregnancy and the site on the food composition were observed. Moreover, we 
constate that the change climate disturbs the food abundance then the food composition. We 
also note that the activity budget differs between sites. These results argue that the feeding 
ecology is defined by the sex and influenced by the pregnancy status. The age and dominance 
rank has no influence. The time spent in feeding behavior differs between sites. Moreover, the 
species richness differs between both sites, therefore the food composition too. The food 
composition is also influenced by the habitat disturbance and the change climate over several 
years. Habitat disturbance plays a significant role in the feeding ecology of sifaka. It is 
therefore essential to minimize this destruction to try to halt the decline of populations of this 
species.

Milne-Edwards' sifaka --- feeding ecology --- Propithecus edwardsi --- lemurs --- P. edwardsi --- feeding propithecus --- sifaka --- sifakas --- food composition sifaka --- food composition --- optimal feeding index --- shannon diversity index --- Sciences sociales & comportementales, psychologie > Psychologie animale, éthologie & psychobiologie

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Forest-steppes occupy a wide zone between Eurasian closed canopy forests and open steppes and feature a mosaic of woody and herbaceous vegetation. Due to the occurrence of structurally, compositionally, and environmentally strongly different habitats in close proximity, high spatial heterogeneity is one of the key characteristics of forest-steppe ecosystems. This volume presents ten contributions examining forest-steppe heterogeneity and its effects on environmental factors, plant communities, and animals.

Research & information: general --- carbon cycling --- natural stable isotope abundance --- nitrogen cycling --- soil organic matter --- temperate grassland --- drought tolerance --- forest–steppe ecotone --- hydraulic strategy --- hydraulic trait --- interspecific association --- interspecific relationships --- species co-occurrence --- semiarid forests --- duration curve --- forest steppe --- sensor network --- spatio-temporal microclimate pattern --- temperature–humidity data logger --- vapour pressure deficit --- pollen analysis --- forest belt --- forest-steppe ecotone --- position migration --- moisture change --- shrub encroachment --- spatial pattern --- temperate savanna --- ecosystem degradation --- sandy grasslands --- Danube-Tisza Interfluve --- morphotaxonomy --- abundance --- community composition --- decomposition --- Shannon diversity --- ecosystem service --- Geotrupidae --- grassland --- indicator species --- land use --- Scarabaeidae --- species richness --- arthropod predation --- connectivity --- dummy caterpillar --- ecosystem function --- edge effect --- forest-steppe --- fragment size --- kurgan --- landscape-scale --- seed predation --- Festuca vaginata --- Festuca pseudovaginata --- Festuca wagneri --- ecological values --- pedological analysis --- diversity --- forest-steppes --- sandy grassland --- grazing-mowing --- NDVI --- Sentinel-2A

Choose an application

• Reference Manager
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Forest-steppes occupy a wide zone between Eurasian closed canopy forests and open steppes and feature a mosaic of woody and herbaceous vegetation. Due to the occurrence of structurally, compositionally, and environmentally strongly different habitats in close proximity, high spatial heterogeneity is one of the key characteristics of forest-steppe ecosystems. This volume presents ten contributions examining forest-steppe heterogeneity and its effects on environmental factors, plant communities, and animals.

Research & information: general --- carbon cycling --- natural stable isotope abundance --- nitrogen cycling --- soil organic matter --- temperate grassland --- drought tolerance --- forest–steppe ecotone --- hydraulic strategy --- hydraulic trait --- interspecific association --- interspecific relationships --- species co-occurrence --- semiarid forests --- duration curve --- forest steppe --- sensor network --- spatio-temporal microclimate pattern --- temperature–humidity data logger --- vapour pressure deficit --- pollen analysis --- forest belt --- forest-steppe ecotone --- position migration --- moisture change --- shrub encroachment --- spatial pattern --- temperate savanna --- ecosystem degradation --- sandy grasslands --- Danube-Tisza Interfluve --- morphotaxonomy --- abundance --- community composition --- decomposition --- Shannon diversity --- ecosystem service --- Geotrupidae --- grassland --- indicator species --- land use --- Scarabaeidae --- species richness --- arthropod predation --- connectivity --- dummy caterpillar --- ecosystem function --- edge effect --- forest-steppe --- fragment size --- kurgan --- landscape-scale --- seed predation --- Festuca vaginata --- Festuca pseudovaginata --- Festuca wagneri --- ecological values --- pedological analysis --- diversity --- forest-steppes --- sandy grassland --- grazing-mowing --- NDVI --- Sentinel-2A --- carbon cycling --- natural stable isotope abundance --- nitrogen cycling --- soil organic matter --- temperate grassland --- drought tolerance --- forest–steppe ecotone --- hydraulic strategy --- hydraulic trait --- interspecific association --- interspecific relationships --- species co-occurrence --- semiarid forests --- duration curve --- forest steppe --- sensor network --- spatio-temporal microclimate pattern --- temperature–humidity data logger --- vapour pressure deficit --- pollen analysis --- forest belt --- forest-steppe ecotone --- position migration --- moisture change --- shrub encroachment --- spatial pattern --- temperate savanna --- ecosystem degradation --- sandy grasslands --- Danube-Tisza Interfluve --- morphotaxonomy --- abundance --- community composition --- decomposition --- Shannon diversity --- ecosystem service --- Geotrupidae --- grassland --- indicator species --- land use --- Scarabaeidae --- species richness --- arthropod predation --- connectivity --- dummy caterpillar --- ecosystem function --- edge effect --- forest-steppe --- fragment size --- kurgan --- landscape-scale --- seed predation --- Festuca vaginata --- Festuca pseudovaginata --- Festuca wagneri --- ecological values --- pedological analysis --- diversity --- forest-steppes --- sandy grassland --- grazing-mowing --- NDVI --- Sentinel-2A