neil d. springate the natural history museum, london, uk sara pinzón university of panama, panama,...
DESCRIPTION
Total 162,113 individuals collected but sampling effort greatly different among sites Results - abundance per site all arthropodsTRANSCRIPT
Neil D. Springate The Natural History Museum, London, UK ([email protected])
Sara Pinzón University of Panama, Panama, PA
Yves Basset Smithsonian Tropical Research Institute, Panama, PA
The IBISCA Malaise trap programme
and focal taxa:
‘Hymenoptera Parasitica’
Estimates the flight activity of insects in the understorey
For each of 9 sites in 2004:One trap set in the understorey (n = 9)
Traps run for 10 daysReplication in February/March, May and October 2004Total 73 trap surveys
The Malaise trap
programme
Site R1
Sites No. surveys Dates 2004 Replicates No. No. ind. collected Average no. ind. Average no. ind.per survey collected in Feb-March
B1 3 Feb-Mar 2 8,015 2,672 2,672B2 2 Feb 2 2,197 1,099 1,099C1 11 Feb to Nov 2, 3, 4 30,695 2,790 1,919C2 11 Feb to Nov 2, 3, 4 23,706 2,155 1,055C3 11 Feb to Nov 2, 3, 4 20,198 1,836 1,703I1 11 Feb to Nov 2, 3, 4 27,533 2,503 1,886R1 3 Feb 2 3,479 1,160 1,160R2 10 Feb to Nov 2, 3, 4 20,505 2,051 1,581R3 11 Feb to Nov 2, 3, 4 25,785 2,344 2,015
Totals 73 162,113
Total 162,113 individuals collectedbut sampling effort greatly different among sites
Results - abundance per siteall arthropods
Results - abundance per site
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
B1 B2 C1 C2 C3 I1 R1 R2 R3
Sites
Tota
l no.
ind.
col
lect
ed
0
500
1,000
1,500
2,000
2,500
3,000
B1 B2 C1 C2 C3 I1 R1 R2 R3
Sites
Ave
rage
no.
ind.
col
lect
ed p
er s
urve
y
0
500
1,000
1,500
2,000
2,500
3,000
B1 B2 C1 C2 C3 I1 R1 R2 R3
Sites
Ave
rage
no.
ind.
per
sur
vey
in F
eb-M
ar 2
004
Raw resultsAverage per survey
Average per surveyin Feb-March 2004 Abundance at B1
higher, lower atB2 and C2 duringFeb-March 2004
0
10
20
30
40
50
60
70
80
90
B1 B2 C1 C2 C3 I1 R1 R2 R3
Sites
Mea
n (s
.e.)
no. i
ndiv
idua
ls p
er tr
ap
Sticky traps
Processing of material:
1) Sorted by higher categories (families) with focal taxa extracted
2) ‘Hymenoptera Parasitica’ isolated but not processed yet
3) From focal taxa: information available on homopterans, sorted by species/morphospecies
Site B1
0
200
400
600
800
1000
1200
For
mic
idae
Cic
adel
lidae
Tip
ulid
ae
Tab
anid
ae
Niti
dulid
ae
Cix
iidae
Cur
culio
nida
e
Mor
delli
dae
Ela
terid
ae
Der
bida
e
Sta
phyl
inid
ae
Chr
ysom
elid
ae
Coc
cine
llida
e
Ale
yrod
idae
Cle
ridae
Tota
l no.
ind.
col
lect
ed
B1B2C1C2C3I1R1R2R3
Abundance of most common families(> 100 ind.) per site
Formicidae I1
Cixiidae I1Coccinellidae I1
Relationships between site characteristicsand arthropod abundance
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
0.68 0.685 0.69 0.695 0.7 0.705 0.71 0.715 0.72 0.725
Normalized Difference Vegetation Index (Landsat)
Aver
age
no. i
nd. c
olle
cted
per
sur
vey
B2R1
R2
C3
C2
C1
B1
I1R3
r = 0.84, p <0.01
Variables available
BANo. plant species
NDVIIllumination
Best relationshipwith NDVI
Explain here strategies for processing, sortingand analyzing Hymenoptera Parasitica
(and what do they include: not Braconidae, not Ichneumonidae,
= Chalcidoidea only?
Biolleyana
Challenge:To account for differentsampling efforts amongsampling methods andhabitats
Total 15,245 homopterans
0
500
1000
1500
2000
2500
3000
3500
4000
4500
Stic
ky tr
aps
Mal
aise
Fogg
ing
Ligh
t tra
ps
Flig
ht in
terc
ept t
raps
Gro
und
FIT
Pitfa
ll tra
ps
Bea
ting
Win
kler
Ber
lese
No.
of i
ndiv
idua
ls c
olle
cted
LitterUnderstoreyCanopyUpper canopy
3,006 homopteranscollected by MT,
179 species
Collecting effort by method (no. ind.)
-0.5 +2.0
-0.5
+1.5
I1
R3B1B2
R1
R2
C1
C2
C3
I1
Total inertia = 1.319Axis 1 = 34%Axis 2 = 14% of variance
I1 rather differentbut meaning of axes obscureBetter calibrating
DCA of homopteran spp. collected by MTand ordered by sites: 39 common spp. (no. ind. 9)
Oronoqua
• Processing of material difficult without adequate support
• Needs to calibrate (rarefaction, re-sampling?) the data
• Abundance/activity among sites may be related to forest type (NDVI)
• Abundance/activity among sites may/may not be related to other
sampling methods
• Differences among sites for homopteran species
obscure at this stage
Conclusions
Acknowledgements: our sponsors and the IBISCA team
Part of IBISCA participants during the field replication of May 2004