how many endangered species live in the tropical rainforest
Tài liệu David prefers to live in the country rather than live in the city doc
Ngày tải lên :
26/02/2014, 00:20
...
David prefers to live in the country rather
than live in the city
something rather than (do) something else” với nghĩa là “ hơn là”. "Prefer .…
rather than"- cách dùng ... do” hoặc “prefer doing”. Nhưng có sự
khác biệt về cấu trúc: “prefer to do something rather than (do) something else”
còn cấu trúc “prefer doing something to (doing) something” – thích làm việc ... nói và người nghe đều biết đến. Ta có 2 cụm từ: in the
country”- ở miền quê và in the city”- ở thành thị.
-“rather than”- hơn là: Trong đó “ rather” là một trạng từ (abverb) có nghĩa là
hơn...
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A shopping dayWe live in the suburb of HCM city. pps
Ngày tải lên :
22/07/2014, 04:20
... for the
family when we got home.
Returning home, I felt quite tired but how
interesting a shopping day it was!e
A shopping day
We live in the suburb of HCM city. Twice a week
my mother ...
Finally, before returning home, we went to the
stationer’s. My mother bought lots of stationery:
ink, pens, ball-point pens and writing pad. On the
way to the bus station we called at the ... bargain. Before leaving, my mother
bought herself two pairs of gloves.
Next, we went straight to the shoe department.
bench in the shade of tall trees, waiting for the
shops to be open again...
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Báo cáo lâm nghiệp: "Links between tree structure and functional leaf traits in the tropical forest tree Dicorynia guianensis Amshoff (Caesalpiniaceae)" ppsx
Ngày tải lên :
08/08/2014, 00:22
... 3), in producing longer internodes and
more nodes per GU, than in the understorey (e.g. ASD 2). The
former had already reached the threshold value allowing
branching, while the latter in the ... that the trees grow-
ing in the clearing displayed a shorter phase of installation than
the trees in the understorey. This further indicates that light con-
ditions did not qualitatively modify the ... suggesting that the variables
were less sensitive to the effects of the environment above a
certain threshold of light intensity. The increase in N
a
resulted
more from the increase in LMA than in N
m
...
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Báo cáo toán học: "Dissimilarity vectors of trees are contained in the tropical Grassmannian" potx
Ngày tải lên :
08/08/2014, 01:20
... shown that the m-dissimilarity vector of a phylogenetic tree T with n leaves
gives a point in the tropical Grassmannian G
m,n
, and therefore gives rise to a tropical
linear space. The combinatorial ... called the weight
of e
ã it is d-equidistant, for some d > 0, i.e. the sum of the edges in the path from the
root to every leaf is precisely d
ã the sum of the weights of all edges in the path ... D is the total weight of T .
In the course of the proof, we assume T is binary, which follows from the construction
of Bocci and Cools [2]. Notice they start with a phylogenetic tree and then...
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Báo cáo lâm nghiệp: "Relationships between hydraulic traits and habitat preference for six Acer species occurring in the French Alps" pptx
Ngày tải lên :
08/08/2014, 01:22
... by increasing their
resistance to cavitation [13], one of the major causes of decline
in the botanical species in the absence of water [5]. In contrast,
Acer species are more restricted to their ... determining
drought tolerance in plants [30]. Catastrophic xylem dysfunc-
tion occurring through the entire xylem results in the death of
the plant [29]. Consequently, studying the differences in the
hydraulic ... drought cavita-
tion (data not shown) in the A. monspessulanum species culti-
vated at the arboretum of the campus, or in the A. pseudoplatanus
species growing on the dry site of “La Bastille”....
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Báo cáo lâm nghiệp: "Water relations of oak species growing in the natural 2 CO spring of Rapolano (central Italy) " potx
Ngày tải lên :
08/08/2014, 18:21
...
30
min
intervals)
was
calculated
from
the
time
taken
by
the
re-equilibration
of
the
bridge,
ie,
by
the
heat
pulse
to
travel
the
distance
from
the
midpoint
of
the
two ...
osmotique
et
une
diminution
de
la
fraction
d’eau
*
Correspondence
and
reprints
growing
in
the
CO
2
spring
showed
increased
production
of
secondary
compounds
(tan-
nins)
and
total ...
performances
in
both
mature
trees
and
seedlings
by
increasing
WUE
and
by
fixing
increased
amount
of
carbon;
this
resulted
in
higher
foliar
tannin
concentrations,
increased
specific...
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Báo cáo lâm nghiệp: "The successional status of tropical rainforest tree species is associated with differences in leaf carbon isotope discrimination and functional traits" pot
Ngày tải lên :
07/08/2014, 16:20
... Bonal et al.
the metabolic intrinsic set point for the trade-off between car-
bon and water fluxes at the leaf level, as reflected by ∆ [13], are
maintained over the lifetime of these species. Except ... tree
species.
In order to understand the origin of the strong variabil-
ity in ∆ among species, we compared the leaf gas exchange
and morphological traits of these species. Differences among
species ... address the following questions:
– Are differences among species in ∆ consistent over onto-
genetic stages (juvenile versus adult)?
– Is the among species variability in ∆ in tropical rainforests
related...
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Báo cáo lâm nghiệp: "A fractal root model applied for estimating the root biomass and architecture in two tropical legume tree species" pps
Ngày tải lên :
08/08/2014, 01:21
... tree species. In E. lanceolata, laterals
continued the growth in the same soil horizon as the main root
in more than half of the bifurcations. Almost no roots were ori-
ented up from the main link ... exposed. In addition to the data recorded for the
roots in the complete root system exposure, the diameter difference
between the point of insertion to root collar (below the initial thick-
ening) ... applied until the final branch of the network, roots of min-
imum diameter D
m
are reached. Here, we applied the D
m
of 5 mm.
The scaling factor
α
is defined as the ratio of the square of...
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Báo cáo lâm nghiệp: "Study of the properties of thirteen tropical wood species to improve the prediction of cutting forces in mode B" pptx
Ngày tải lên :
08/08/2014, 01:22
... wood
behaviour during machining. In fact, the unique parameter
“P
f,I
” is able to explain almost 70% of the variations of cutting
forces involved during machining. In comparison with results
obtained with ... propagation in the wood cutting process
influences either the quality of the chip in veneer cutting, or the qual-
ity of the residual surface in other cases. The theory of fracture
mechanics ... economical
purposes [9]. However, at present, to estimate cutting forces
during wood machining, a factor remains difficult to take into
consideration: the influence of wood species. Therefore, the
aim of this...
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Báo cáo khoa học: "Effect of endomycorrhizas and nematodes on the growth of seedlings of Dicorynia guianensis Amshoff, a tree species of the tropical rain forest in French Guiana " docx
Ngày tải lên :
08/08/2014, 18:21
...
2
weeks.
The
seedlings
were
grown
in
a
shade
tun-
nel
intercepting
85%
of
the
incident
light
(in
order
to
simulate
the
light
intensity
at
the
level
of
forest
floor
in
closed ...
inoculating,
but
such
references
are
lacking
in
the
still
relatively
unexplored
field
of
tropical
tree
seedlings.
In
addition,
the
precise
age
of
the
D
guianensis
seedlings
in ...
mycorrhiza-dependant
in
the
forest
as
in
the
experiment.
This
strongly
supports
the
hypothesis
that
the
endomyc-
orrhizal
status
of
the
seedlings
is
a
critical
factor
controlling
the
regeneration...
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Báo cáo khoa học: "First observations on the root morphology and symbioses of 21 major tree species in the primary tropical rain forest of French Guyana" pps
Ngày tải lên :
08/08/2014, 19:21
...
in
Venezuela
and
the
Guyanas
than
in
other
tropical
rain
forests,
in
spite
of
the
fact
that
the
soil
fertility
is
particulary
low
in
these
INTRODUCTION
The
primary
tropical ...
CONCLUSIONS
The
different
tree
species
in
the
tropical
rain
forest
of
the
French
Guyana
obviously
dis-
play
a wide
range
of
strategies
in
exploring
the
soil
and
using
its ...
endomycor-
rhizas
with
entry
points,
intercellular
mycelium
and
arbuscules,
and/or
vesicles
(fig
5)
were
found
in
the
fine
long
roots
of
all
the
species
examined.
Another
endo-
mycorrhiza-like...
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