3rd european agroforestry conference...references batish d (ed) (2008) ecological basis of...
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EFFECT OF AGROFORESTRY MICROCLIMATE OVER SPIDERS AND GROUND
BEETLES DAILY-ACTIVITY
Ambroise Martin-Chave : AGROOF
Christophe Mazzia : IMBE UMR 7263
Camille Beral : AGROOF
Yvan Capowiez : INRA PSH
3rd European Agroforestry Conference
contact : [email protected] 1
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PROJECT CONTEXT
Part of the ARBRATATOUILLE project :
AGROOF + INRA PSH & ECODEV + 3 Farmers
Supported by Fondation de France, Picard Fundation and Terra
Symbiosis (2014-2016)
Agroforestry microclimate : effects over organic vegetable
crops (I) and associated biodiversity (II)
Introduction
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ISSUES
Chemicals use reduction ; Organic pests management
Agroforestry potential for biodiversity conservation (Burgess
1999; Malézieux et al. 2009)
Trees create new habitats and alter various microclimatic factors
(shade, T°, rH) indirect impact on biotic interactions, such as tri
trophic interactions (Batish 2008)
Predatory arthopods play major role in pests biocontrol, but how
are they affected by agroforestry microclimate ?
Introduction
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What we know : daily-activity is mainly influenced by site openness
(Thiele 1977, Tuf 2012) and temperature (Thiele 1977)
Daily activity patterns provide informations over habitats suitability
and can also influence predation potential (Edgar 1969)
How agroforestry microclimates could affect the daily-activity of
major predatory arthropods in organic vegetable crops?
PROBLEMATIC
Introduction
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Playing field :
The study site is part
of the « Terres de
Roummassouze »
organic farm owned
by Denis and Virginie
Flores, in Vézénobres
(30 – France).
Vegetables crops
are conducted in a
north-south axe.
Control
AF + AF - AF ++
40 meters
Materials & Methods
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Samplings : Arachnids and ground beetles, 5 times a day, 10
days in July and 10 days in september
30 pitfalls traps by treatment, to monitor grass strips (2 x 5
pitfall traps), lettuces (10 pitfall traps) and tomatoes (10 pitfall
traps)
Microclimatic measurements : hemispherical photographs,
temperature and hygrometry continuous aquisition (iButtons)
Materials & Methods
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1) MICROCLIMATE
Canopy openness at three period, in the three agroforestry plots
Leaves appeared after the April assessment, and fall later in November.
Results
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35°C
25°C
-2,5°C
-2,5°C
+2°C
+2°C
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7h-10h 10h-14h 14h-18h 18h-21h 21h-7h
Results
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a a b b
Significant difference
between AF++, Af+ vs
AF- and control
Significant
difference at mid
day period (10h-
14h) between AF-,
CONTROL and
AF++
(the shadiest vs the
less shaded plots,
ANOVA +
TukeyHSD tests)
Pardosa hortensis daily abundance in July JULY
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No significant
difference (ANOVA),
but no point were
made during night
Results
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a b c c
7h-10h 10h-14h 14h-18h 18h-21h 21h-7h
Pseudoophonus rufipes daily abundance in July
Similar abundance in
AF- and control, less
individuals in AF++
and AF+
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SEPTEMBER
Results
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Effects seem to be
less importants
during september.
Activity is similar in
each treatment.
Differences between
treatments are non
significatives (ANOVA)
a a a a
7h-10h 10h-14h 14h-18h 18h-21h 21h-7h
Pardosa hortensis daily abundance in September
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Significant
differences
between AF++
and others at
midday,
between AF++
and control at dusk
and night. 12
Great differences
between treatments
occured in September
a b bc a
7h-10h 10h-14h 14h-18h 18h-21h 21h-7h
Results
a b c a
Pseudoophonus rufipes daily abundance in September
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DISCUSSION
Trees buffered temperatures
Agroforestry enhanced wolf spiders global activity at the
warmer period : sun protection ? (Edgar 1969)
P. rufipes daily-activity seems not to be affected, but
abundances are affected in July -> functional effect ?
In September, « disorganized » differences
Discussion
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CONCLUSION
Agroforestry buffering general climate (Chen et al. 1999)
Impacts on species depending on their respective ecology
Potentially affect predation rate at the day and season scale.
Interest of low dispersion hability fauna for agroforestry
Conclusion
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Thank you for your attention,
and see you tomorrow at the study site !
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REFERENCES
Batish D (ed) (2008) Ecological basis of agroforestry. CRC Press, Boca Raton, FL
Burgess PJ (1999) Effects of agroforestry on farm biodiversity in the UK.
Chen J, Saunders SC, Crow TR, et al (1999) Microclimate in Forest Ecosystem and Landscape Ecology Variations in local climate can be used to monitor and compare the effects of different management regimes. BioScience 49:288–297.
Edgar WD (1969) Prey and Feeding Behaviour of Adult Females of the Wolf Spider Pardosa Amentata (Clerck). Neth J Zool 20:487–491. doi: 10.1163/002829670X00259
I. H. Tuf PD (2012) Does the diurnal activity pattern of carabid beetles depend on season, ground temperature and habitat? Arch Biol Sci. doi: 10.2298/ABS1202721T
Malézieux E, Crozat Y, Dupraz C, et al (2009) Mixing plant species in cropping systems: concepts, tools and models. A review. Agron Sustain Dev 29:43–62. doi: 10.1051/agro:2007057
Thiele H-U (1977) Carabid Beetles in Their Environments. Springer Berlin Heidelberg, Berlin, Heidelberg
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