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Alexandre Buttler

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Publications associées (136)

The influence of competition from herbaceous vegetation and shade on simulated browsing tolerance of coniferous and deciduous saplings

Alexandre Buttler, François Frelechoux, Charlotte Vandenberghe

The ability of saplings to tolerate browsing (i.e. the ability to persist with reduced biomass and to compensate for biomass loss) is influenced by the level of stress and their growth strategies. Ultimately, insight into species-specific responses of sapl ...

2008

Pollen productivity estimates and relevant source area of pollen for selected plant taxa in a pasture woodland landscape of the Jura Mountains (Switzerland)

Alexandre Buttler, Pascal Vittoz

Relevant source area of pollen (RSAP) and pollen productivity for 11 key taxa characteristic of the pasture woodland landscape of the Jura Mountains, Switzerland, were estimated using pollen assemblages from moss polsters at 20 sites. To obtain robust poll ...

Springer Verlag2008

Cutover peatland regeneration assessment using organic matter and microbial indicators (bacteria and testate amoebae)

Alexandre Buttler, Edward Mitchell

Cutover peatlands cover large surfaces of high potential value for biodiversity and carbon sequestration function if successfully restored but the evaluation of restoration success is not straighforward. We assessed the bioindicator value of organic mat ...

2008

Short-term effects of cattle browsing on tree sapling growth in mountain wooded pastures

Alexandre Buttler, François Frelechoux, Charlotte Vandenberghe

Browsing by livestock has been identified as an important factor preventing tree regeneration in wooded pastures. Two field experiments were performed to investigate the effects of cattle browsing on tree sapling growth in a mountainwooded pasture. Two siz ...

2007

Modern pollen/vegetation/land-use relationships in mountain environments : an example from the Champsaur valley (French Alps)

Alexandre Buttler

2006

Competitive effects of herbaceous vegetation on tree seedling emergence, growth and survival: does gap size matter?

Alexandre Buttler, François Frelechoux, Charlotte Vandenberghe

Question: What is the effect of gap size on the seedling emergence, growth and survival of four common tree species in wooded pastures? Location: A pasture in the Jura mountains, Switzerland. Methods: Seeds were sown in a complete three-way factorial desig ...

2006

Reconciling commercial exploitation of peat with biodiversity in peatland ecosystems

Alexandre Buttler, Edward Mitchell

2006

Spatial and seasonal patterns of cattle habitat use in a mountain wooded pasture

Alexandre Buttler, François Gillet, Jean-Michel Gobat

Management-oriented models of cattle habitat use often treat grazing pressure as a single variable summarizing all cattle activities. This paper addresses the following questions: How does the spatial pattern of cattle effects vary between cattle activitie ...

2006

Effect of cattle activities on gap colonisation in mountain pastures

Alexandre Buttler, François Gillet, Jean-Michel Gobat

Cattle influences gap dynamics in pastures in two ways: (1) by creating gaps and (2) by affecting the colonization process. This effect of cattle activity on gap revegetation can be subdivided in three main factors: herbage removal, trampling and dung and ...

2006

Carbon balance of a European mountain bog at contrasting stages of regeneration

Alexandre Buttler, Andy Siegenthaler

Carbon dioxide and methane (CH4) fluxes were measured in a cutover bog of the Jura Mountains (France) together with biotic and abiotic variables for two entire vegetation periods in order to compare the carbon balance of the bog at three stages of regenera ...

Wiley-Blackwell2006

Plant species richness and environmental heterogeneity in a mountain landscape: effects of variability and spatial configuration

Alexandre Buttler

The loss of biodiversity has become a matter of urgent concern and a better understanding of local drivers is crucial for conservation. Although environmental heterogeneity is recognized as an important determinant of biodiversity, this has rarely been tes ...

2006

Modern pollen assemblages from grazed vegetation in the western Pyrenees, France: a numerical tool for more precise reconstruction of past cultural landscapes

Alexandre Buttler

Modern pollen assemblages from grazed vegetation in the Pyrenees Mountains (France) were studied with the aim of providing a calibrated model for reconstructing past pastoral activities. The modern analogues were selected to cover the major gradients of gr ...

2006

Safe sites for tree regeneration in wooded pastures: A case of associational resistance?

Alexandre Buttler

Question: Are tree saplings in wooded pastures spatially associated with specific nurse structures or plants that facilitate tree sapling survival? Location: Wooded pastures in the Jura Mountains, Switzerland. Methods: In two sites, 73 kin apart, we sample ...

2005

Modern pollen-vegetation relationships in the Champsaur valley (French Alps) and their potential in the interpretation of fossil pollen records of past cultural landscapes

Alexandre Buttler

This study is an attempt to evaluate the relationships between the vegetation and the modem pollen rain as a contribution to palaeoecological research. Pollen analysis of surface moss polsters and floristic records has been undertaken for 51 sampling point ...

2005

Spatial dependence and seasonal patterns of cattle activity

Alexandre Buttler, François Gillet

CABI2005

Soil microbial community changes in wooded mountain pastures due to simulated effects of cattle grazing

Alexandre Buttler, François Gillet, Jean-Michel Gobat

The effect of cattle activity on pastures can be subdivided into three categories of disturbances: herbage removal, dunging and trampling. The objective of this study was to assess separately or in combination the effect of these factors on the potential a ...

2005

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