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res pp_forest_flo_sp_min

The observation of several tree species, with different phenological development strategies, allows to study a wide spectrum of phenological responses to climatic variations and therefore to determine which species are best candidates as indicators of long term effects of climatic change. Some species have an early development and flowering (early species), while others species (late species), develop later during the year. Finally there are the intermediate species, which show an intermediate behaviour. During the three years of the Pheno_Plantes action (2009-2011) the order of flowering of the tree species monitored remained the same (see the figure): hazelnut was the earliest to flower, while rowan was the latest

Altitude effect

Altitude plays a major role in regulating phenology in mountainous areas. Since the temperature decreases as altitude increases, the physiology of plants also decreases and consequently plant development is delayed at higher altitude. All the observed specieswere influenced by altitude (see below figure).

flo multi_sp_min

Effect of interannual weather variability

Interannual weather variations affects tree phenology responses of all species and at all altitudes. Every forest species show early phenological spring development (reproductive and vegetative) during the warmest of the three monitoring years (i.e. 2011). Thus phenological observations of these species can be considered good indicators of the effects of both interannual weather variability and long term climatic trends.

phénoplant forestier_min

The network currently consists of 245 forest tree species monitoring sites. Most of the sites (189) are located in France, because of the existence of the Phenoclim network created in 2004. Seven sites are located in Switzerland. 49 Italian sites were created from the French-Italian collaboration within the framework of the PhenoAlp project. For each site 3 forest species (i.e. 9 tree individuals) are monitored, and the observations are carried out in the spring and autumn, in order to notice the dates relative to the most important phenological stages. This kind of monitoring has several advantages, since it allows to obtain information useful for conservation purposes and for scientific research, but it is also a valuable pedagogical instrument that helps create awareness on climate change effects. Te involved observers belong to an extremely vast public: from experts in environmental field to schools and volunteers (see PhenoForm action).

NEWS

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents

Jan 2013

NEW PAPER! "Phenology and carbon dioxide source/sink strength of a subalpine grassland in response to an exceptionally short snow season" was published on Environmental Research Letters

May 2013

Watch PhenoALP presentation video!

Jun 2014

NDVI database now available

Aug 2013

Do you want to start phenological observations in your classes? Here is the experience from Torgnon primary school.

Dec 2013

Midterm Meeting took place: have a look at the contents