nocturnal bird communities in a regenerating tropical forest in se peru
TRANSCRIPT
Nocturnal bird communities in a
regenerating tropical forest, SE Peru
Laura Braunholtz
Zoology Work Placement MSci
University of Glasgow
Photo: Marcus Brent-Smith
Photo: Marcus Brent-Smith
Aim:
Investigate how different levels of human disturbance has
affected the nocturnal bird community of the MLC reserve.
Hypotheses:
H1: That time of survey would affect the number of
nocturnal bird individuals detected.
H2: That the forest with a history of higher human
disturbance would have a lower diversity and abundance of
nocturnal birds.
H1: That time of survey would
affect the number of individuals
detected.
Fig. 1: Comparison of average bird abundance for AM and PM transects. Each
data point (N=11) is the average bird abundance (birds per km trail surveyed) for
each trail (p=0.23).
H2: That the forest type with a history
of higher human disturbance (CCR)
would have a lower diversity and
abundance of nocturnal birds.
Fig. 1: Average number of birds encountered per km.
Fig. 2: Sample-based rarefaction curves for number of species estimated
to be encountered with the number of individuals sampled for the three
forest types.
0
2
4
6
8
10
12
14
Com
mon
Pot
oo
Gre
at P
otoo
Long-
taile
d Pot
oo
Short-
taile
d N
ight
jar
Ladde
r-ta
iled
Nig
htja
r
Oce
llate
d Poo
rwill
Paura
que
Am
azon
Pyg
my
Ow
l
Ferru
gino
us P
ygm
y O
wl
Tawny
Bel
lied
Scree
ch O
wl
Verm
icul
ated
Scr
eech
Ow
l
Ban
d-be
llied
Ow
l
Spect
acle
d O
wl
Mot
tled
Ow
l
Cre
sted
Ow
l
Abu
ndan
ce
CCR
PCR
SLR