• Aucun résultat trouvé

Wood for bees, which interactions?

N/A
N/A
Protected

Academic year: 2021

Partager "Wood for bees, which interactions?"

Copied!
20
0
0

Texte intégral

(1)

HAL Id: cel-02010186

https://hal.archives-ouvertes.fr/cel-02010186

Submitted on 19 Mar 2019

HAL is a multi-disciplinary open access

archive for the deposit and dissemination of

sci-entific research documents, whether they are

pub-lished or not. The documents may come from

teaching and research institutions in France or

abroad, or from public or private research centers.

L’archive ouverte pluridisciplinaire HAL, est

destinée au dépôt et à la diffusion de documents

scientifiques de niveau recherche, publiés ou non,

émanant des établissements d’enseignement et de

recherche français ou étrangers, des laboratoires

publics ou privés.

Wood for bees, which interactions?

Anna Dupleix

To cite this version:

(2)

Wood for bees, which interactions?

The University of Tehran, Dept Wood Sciences, University College

of Agriculture and Natural Ressources 01/10/2018

Anna Dupleix

Post-doctoral researcher

__________________________________________________

Montpellier, France

__________________________________________________

Wood sciences

Anthropology

Apidology

(3)

Contents

The researcher

The laboratory

The project

The history

Physical approach

Chemical and ecological approach

Social sciences approach

Latest developments

Future work

(4)

Researcher background

3

International co-tutelle agreement between Arts et Métiers ParisTech LaBoMaP, Cluny,

France and Aalto University, Helsinki, Finland

Topic : Feasibility of wood peeling assisted by infrared

Engineer

Master degree in Wood Technology

Master of research in Timber design

Topic : Investigation on failure modes of multiple-nailed steel-to-timber

connections loaded parallel to the grain

(5)

Master thesis :

Investigating failure modes of multiple-nailed

steel-to-timber connections loaded parallel to the grain

Case study : Radiata Pine (Pinus Radiata)

4

Cr

ed

its

:

A

nna

D

up

le

ix

brittle failure

ductile failure

Appl

ie

d l

oa

d

Displacement

Fig.2. Load vs displacement curves

in case of ductile and brittle failures

0

50

100

150

200

250

0

2

4

6

Load (

k

N

)

Displacement (mm)

Specimen 410red-1

Bottom

Top

Fig.3. Typical load-displacement

curve of a tested specimen

(6)

PhD thesis

:

Feasibility of wood peeling assisted by infrared radiation

5

Cr

ed

its

:

A

nna

D

up

le

ix

(7)

PhD thesis

:

Wood kebab

6

Cr

ed

its

:

A

nna

D

up

le

ix

(8)

Laboratory

7

Wood sciences

Anthropology

Apidology

Montpellier, France

Biomechanics and wood formation

Wood building

Diversity of wood properties

(9)

Project : Wood for bees, which interactions?

8

Source : omafra.gov.on.ca

Source : pinterest.fr

Source : omafra.gov.on.ca

Source : pinterest.fr

Honeybees have to face major problems nowadays

(pesticides, Varroa destructor, climate change, etc.)

Their lives are at stake and therefore humanity because

of their role in pollination

Our hypothesis is that the wood material of the hives can help them

thanks to many interactions.

(10)

History of the project

9

Traditional uses of beehives

-

In Cévennes (South of France) : chestnut trunk

-

In Finland : polystyren

(11)

Hypothesis of the project and methods of work

10

Scientific hypothesis from local traditional knowledge

1) « Chestnut trunk beehives can lower temperature and humidity differences thanks to

thickness of wood »

2) « Polystyrene beehive is more insulative from a thermal point of view »

3) « Chestnut extractives promote bees health »

4) « Chestnut wood is repellent to Varroa destructor »

Tests on the thickness and material of beehive on (T°C, RH%) inner

climate

Tests on the effect of chestnut extractives on Varroa destructor and

bees health

(12)

Physical approach

11

Comparison of different thicknesses and wood species on inner (T°C, RH%) climate

Material

Thicknesses

(mm)

Open/

Closed

Chestnut

15, 21, 30

21

closed

open

Cryptomeria

21

closed

Spruce

21

21

closed

open

Polystyrene

21

21

closed

open

So

ur

ce

: A

nna

D

up

le

ix

(13)

First results

12

Relative Humidity (%) in blue and Temperature (°C) in red

20

25

30

35

40

45

50

55

60

65

70

04/07/2018_1 05/07/2018_1 06/07/2018_1 07/07/2018_1 08/07/2018_1 09/07/2018_1 10/07/2018_1 11/07/2018_1 12/07/2018_1 13/07/2018_1 14/07/2018_1 15/07/2018_1 16/07/2018_1 17/07/2018_1 18/07/2018_1 19/07/2018_1 20/07/2018_1 21/07/2018_1 22/07/2018_1 23/07/2018_1 24/07/2018_1 25/07/2018_1 26/07/2018_1 27/07/2018_1 28/07/2018_1 29/07/2018_1 30/07/2018_1 31/07/2018_1 01/08/2018_1 02/08/2018_1 03/08/2018_1 04/08/2018_1 05/08/2018_1 06/08/2018_1 07/08/2018_1

exterior

20

25

30

35

40

45

50

55

60

65

70

04/07/2018_1 05/07/2018_1 06/07/2018_1 07/07/2018_1 08/07/2018_1 09/07/2018_1 10/07/2018_1 11/07/2018_1 12/07/2018_1 13/07/2018_1 14/07/2018_1 15/07/2018_1 16/07/2018_1 17/07/2018_1 18/07/2018_1 19/07/2018_1 20/07/2018_1 21/07/2018_1 22/07/2018_1 23/07/2018_1 24/07/2018_1 25/07/2018_1 26/07/2018_1 27/07/2018_1 28/07/2018_1 29/07/2018_1 30/07/2018_1 31/07/2018_1 01/08/2018_1 02/08/2018_1 03/08/2018_1 04/08/2018_1 05/08/2018_1 06/08/2018_1 07/08/2018_1

cryptomeria closed 21mm

20

25

30

35

40

45

50

55

60

65

70

06/07/2018_1 07/07/2018_1 08/07/2018_1 09/07/2018_1 10/07/2018_1 11/07/2018_1 12/07/2018_1 13/07/2018_1 14/07/2018_1 15/07/2018_1 16/07/2018_1 17/07/2018_1 18/07/2018_1 19/07/2018_1 20/07/2018_1 21/07/2018_1 22/07/2018_1 23/07/2018_1 24/07/2018_1 25/07/2018_1 26/07/2018_1 27/07/2018_1 28/07/2018_1 29/07/2018_1 30/07/2018_1 31/07/2018_1 01/08/2018_1 02/08/2018_1 03/08/2018_1 04/08/2018_1 05/08/2018_1 06/08/2018_1 07/08/2018_1

polystyrene closed 21mm

20

25

30

35

40

45

50

55

60

65

70

04/07/2018_1 05/07/2018_1 06/07/2018_1 12/07/2018_1 13/07/2018_1 14/07/2018_1 15/07/2018_1 16/07/2018_1 17/07/2018_1 18/07/2018_1 19/07/2018_1 20/07/2018_1 21/07/2018_1 22/07/2018_1 23/07/2018_1 24/07/2018_1 25/07/2018_1 26/07/2018_1 27/07/2018_1 28/07/2018_1 29/07/2018_1 30/07/2018_1 31/07/2018_1 01/08/2018_1 02/08/2018_1 03/08/2018_1 04/08/2018_1 05/08/2018_1 06/08/2018_1 07/08/2018_1

chestnut closed 30mm

(14)

Chemical and ecological approach

13

Comparison of effects on chestnut vs spruce extractives on Varroa destructor

Fig. 1: Chestnut extractives extraction (in gaz and in liquid forms)

Fig. 2: Electrodes for testing olfactive sensors (located in the front leg) of Varroa

2mm

So

ur

ces

:

H

ar

rin

gt

on

(15)

Social sciences

14

Face to face interviews with beekeepers and beehive builders

on their knowledge and perception of the wood material for the

bees

Beekeepers and beehive builders have strong knowledge on the

wood material (species, properties)

They know how to use it

Some of them think it has an influence on the bees health

(depending on their kind of beekeeping)

(16)

Development of Varroa counting

(17)

Contexte

Today

Tomorrow

Time-consuming

Smartphone

Application

From manual to automated counting

8

(18)

First results of counting

17

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

31/12/2017 19/02/2018 10/04/2018 30/05/2018 19/07/2018 07/09/2018 27/10/2018

Chestnut Varroa count/Day/Colony Population =f(t)

RUCHE 2 (Châtaignier)

RUCHE 4 (Châtaignier)

RUCHE 6 (Châtaignier)

RUCHE 8 (Châtaignier)

(19)

Future work

18

Study (T°C, RH%) inside living beehives (with bees)

Comparison of effects on chestnut vs spruce extractives on bees

health

Continue this work on bee hives in living trees

Bashkyrie/Poland

(20)

Thank you for your attention

and

Welcome to work together in

France and Iran

Figure

Fig. 1: Empty hives equipped with (T°C, RH%) sensors
Fig. 1: Chestnut extractives  extraction (in gaz and in liquid forms)

Références

Documents relatifs

A two-layer model describing the interaction of a shear bubble layer formed by breaking waves and an underlying potential layer is derived in shallow water approximation.. A

In this paper, we show that, in the case of the Wasserstein-Fisher-Rao metric, the equivalent to the incompressible Euler equation is a generalization of the Camassa-Holm

40 جمابرلا فلتخبم رئازلجا ةيصخش نع عافدلا ىلع لمعتس تايعجم و بازحأ زورب لىإ يدؤيس يذلا يسايسلا لمجا و ةدعصلأا فلتمخ ىلع و تاحورطلأا و

To test whether the effect of collagenases was due to collagen cleavage, cell migration, cell adhesion, cell stiffness and wound healing were also estimated under various

The aim of this study was to examine the neural correlates of people-selectivity (i.e., regions that preferred face and voice information, regardless of condition),

Since we conceptualized co- herence perception as a cognitive equivalent of social distance regulation (feelings of relatedness), which has been associated with the activity

L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des

According to their wood anatomical properties, wood-ray proportion seems to be positively correlated with wood basic density, radial shrinkage, tangential shrinkage and