Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 ANALYSIS OF THE IMPLEMENTATION OF Eucalyptus grandis E Syzygium jambos TO THE FEDERAL UNIVERSITY OF PERNAMBUCO CAMPUS, CONSIDERING AGE AND WOOD VOLUME Danilo Quintas Souto Maior 1 , Otacilio Antunes Santana 1 , Euzelina Borges dos Santos Inácio 1 , Laerte Bezerra de Amorim 2 , José Imaña Encinas 3 4 ABSTRACT The objective of this study was to evaluate two tree species (Eucalyptus grandis and Syzygium jambos) planted on the Campus of Federal University of Pernambuco in the municipality of Recife in the late 1940s. We analyzed the parameters of age and volume to discuss the implementation of these species to the current campus planning and management. We used the growth rings to measure the tree ages, collected with an increment borer. We analyzed 40 individuals for 10 years (2001-2010). The volume of species was determined in the relationship between actual trunk volume and the cylinder volume. The results show that volume has a significant and direct relation with the age variable. The individuals of the species Eucalyptus grandis had a larger wood growth than Syzygium jambos did, which may be attributed to their model of photosynthesizing products, as discussed in the literature. The growth of tree individuals implemented to the Federal University of Pernambuco showed expected results; however, due to the expansion of roads and construction sites, trees have become a risk of damage to these installations. Key words: dendrochronology; urban areas; exotic species. DIAGNÓSTICO DA IMPLANTAÇÃO DE Eucalyptus grandis E Syzygium jambos NO CAMPUS DA UNIVERSIDADE FEDERAL DE PERNAMBUCO, ATRAVÉS RELAÇÃO DA IDADE COM O VOLUME DE MADEIRA RESUMO O objetivo deste trabalho foi avaliar duas espécies arbóreas (Eucalyptus grandis e Syzygium jambos) implementadas no Campus Universitário da Universidade Federal de Pernambuco/Campus Recife, no final da década de 40 (Século XX), quanto a sua relação idade e volume; e discutir a implementação destas espécies no plano de arborização do campus. As idades foram mensuradas através dos anéis de crescimentos, coletados com trado de incremento. Foram utilizados 40 indivíduos e analisados um período de 10 anos (2001-2010). O volume das espécies foi determinado por meio da relação entre o volume real do tronco pelo volume do cilindro. Os resultados mostram que a variável volume possui uma relação diretamente proporcional e significativa com a variável idade, sendo assim os indivíduos da espécie Eucalyptus grandis apresentaram um crescimento do tronco maior que Syzygium jambos, podendo ser devido ao modo de investimento de seus produtos fotossintéticos, conforme discutidos pela literatura. O crescimento dos indivíduos arbóreos no planejamento do Campus da Universidade Federal de Pernambuco atenderam as expectativas propostas, porém, com a expansão das vias e das construções, os indivíduos arbóreos tornaram riscos a danos a estas instalações. Palavras-chave: dendrocronologia; áreas urbanas; espécies exóticas. 1 Depto. Biofísica e Radiobiologia, Universidade Federal de Pernambuco. [email protected]; otacilio.santana, euzelina.inacio 2 Depto. de Energia Nuclear, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco. [email protected]3 Departamento de Engenharia Florestal, Faculdade de Tecnologia, Universidade de Brasília. [email protected]4 recebido em 26.05.2012 e aceito para publicação em 15.06.2013 ISSN 1980-7694 ON-LINE
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Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013
ANALYSIS OF THE IMPLEMENTATION OF Eucalyptus grandis E Syzygium jambos TO THE
FEDERAL UNIVERSITY OF PERNAMBUCO CAMPUS, CONSIDERING AGE AND WOOD
VOLUME
Danilo Quintas Souto Maior1, Otacilio Antunes Santana1, Euzelina Borges dos Santos Inácio1, Laerte Bezerra de
Amorim2, José Imaña Encinas3 4
ABSTRACT
The objective of this study was to evaluate two tree species (Eucalyptus grandis and Syzygium jambos) planted on the Campus of Federal University of Pernambuco in the municipality of Recife in the late 1940s. We analyzed the parameters of age and volume to discuss the implementation of these species to the current campus planning and management. We used the growth rings to measure the tree ages, collected with an increment borer. We analyzed 40 individuals for 10 years (2001-2010). The volume of species was determined in the relationship between actual trunk volume and the cylinder volume. The results show that volume has a significant and direct relation with the age variable. The individuals of the species Eucalyptus grandis had a larger wood growth than Syzygium jambos did, which may be attributed to their model of photosynthesizing products, as discussed in the literature. The growth of tree individuals implemented to the Federal University of Pernambuco showed expected results; however, due to the expansion of roads and construction sites, trees have become a risk of damage to these installations. Key words: dendrochronology; urban areas; exotic species.
DIAGNÓSTICO DA IMPLANTAÇÃO DE Eucalyptus grandis E Syzygium jambos NO CAMPUS DA
UNIVERSIDADE FEDERAL DE PERNAMBUCO, ATRAVÉS RELAÇÃO DA IDADE COM O
VOLUME DE MADEIRA
RESUMO
O objetivo deste trabalho foi avaliar duas espécies arbóreas (Eucalyptus grandis e Syzygium jambos) implementadas no Campus Universitário da Universidade Federal de Pernambuco/Campus Recife, no final da década de 40 (Século XX), quanto a sua relação idade e volume; e discutir a implementação destas espécies no plano de arborização do campus. As idades foram mensuradas através dos anéis de crescimentos, coletados com trado de incremento. Foram utilizados 40 indivíduos e analisados um período de 10 anos (2001-2010). O volume das espécies foi determinado por meio da relação entre o volume real do tronco pelo volume do cilindro. Os resultados mostram que a variável volume possui uma relação diretamente proporcional e significativa com a variável idade, sendo assim os indivíduos da espécie Eucalyptus grandis apresentaram um crescimento do tronco maior que Syzygium jambos, podendo ser devido ao modo de investimento de seus produtos fotossintéticos, conforme discutidos pela literatura. O crescimento dos indivíduos arbóreos no planejamento do Campus da Universidade Federal de Pernambuco atenderam as expectativas propostas, porém, com a expansão das vias e das construções, os indivíduos arbóreos tornaram riscos a danos a estas instalações. Palavras-chave: dendrocronologia; áreas urbanas; espécies exóticas.
1 Depto. Biofísica e Radiobiologia, Universidade Federal de Pernambuco. [email protected]; otacilio.santana, euzelina.inacio 2 Depto. de Energia Nuclear, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco. [email protected] 3 Departamento de Engenharia Florestal, Faculdade de Tecnologia, Universidade de Brasília. [email protected] 4 recebido em 26.05.2012 e aceito para publicação em 15.06.2013
ISSN 1980-7694 ON-LINE
Danilo Quintas Souto Maior et al.
Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 42
INTRODUCTION
Exotic tree species are defined as species planted in
habitats different from their origin. They have high
dispersion and growth rates, and, therefore,
compete directly with native species for light and
nutrients (PIECK et al., 2011). In Brazil, several
exotic tree species have been introduced, not only
for wood production, as in the case of
monocultures, but also for urbanization systems.
Two of these species are Eucalyptus grandis Hill
ex. Maiden (Myrtaceae) and Syzygium jambos L.
(Myrtaceae), popularly known in Brazil as
“eucalipto-grandis” and “jambeiro”.
Eucalyptus grandis is the most planted forest
species in Brazil (SOUZA et al., 2004) due to its
production potential and its wood characteristics.
Its wood is used to produce pulp, paper, fiber and
chipboard panels, industrial and domestic fuel and
sawmill products; however, this species is native to
the eastern coast of Australia (SOARES et al.,
2003). Syzygium jambos also belongs to the
Myrtaceae family. It is native to India and Malasia.
Its fruits are edible and very attractive for their
violet and dark red colors. The fruits are
appreciated for the aroma and attract fauna and
insects (PIO CORREA, 1969). They are used as
diuretic, digestive and anti-fever products
(CRAVO, 1994). The leaves are used in popular
medicine for their digestive and anti-inflammatory
functions (SLOWING et al., 1996).
The time factor is a very important variable for
these species, because, since they are exotic
species, the literate reports that they have a high
seed dispersion capacity and shoot growth (trunk
and crown) (ARIAS et al., 2011; ENCINAS et al.,
2005). Over time, individuals from these species
show great phytosociological importance to the
local environment, with high levels of density,
dominance and occurrence (MILLWARD; SABIR,
2011; RAMÍREZ et al., 2011). Consequently, the
value of total volume per area (m3/ha) increases.
The ratio age/volume was described in several
studies in the literature, emphasizing: competition
for light and nutrients (BACILIO et al., 2011);
indicators of climatic changes (BOULILA et al.,
2011); nutrient cycling (BROWN et al., 2011);
litterfall production (COUTURIER et al., 2011);
soil salinity (FEIKEMA; BAKER, 2011);
efficiency of fruit production (HUTTON;
LOVEYS, 2011); wood production (HYNYNEN et
al., 2011); buffers for climatic changes (KANTARC
et al., 2011); differences of altitude and pressure
(KRUMM et al., 2011); species mortality
(MEYER; SCHMIDT, 2011); microbial
decomposition (PRESTON et al., 2011); soil
dystrophy (SINGH et al., 2011); concentration of
active principles (SREELATHA et al., 2011);
effects of herbivory (STRAW et al., 2011); urban
planning (VALDEZ-AGUILAR; CARTMILL,
2011); carbon accumulation (WANG et al., 2011);
geomorphologic indicators (YOSSIFOVA et al.,
2011); among others.
Studies on tree wood volume are essential, because
they provide data on wood for the production of
wood pulp, furniture, wood for civil constructions,
charcoal and others. These studies generate data
for calculating carbon accumulation, a factor for the
reduction of CO2 levels in the atmosphere and
crucial to mitigate global warming (WU et al.,
2011). Carbon accumulation occurs in the
photosynthesis process where CO2 and other
molecules produce carbohydrates that accumulate
in their sustaining plant tissues and are inserted into
ANALYSIS OF THE IMPLEMENTATION OF Eucalyptus grandis…
Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 43
other tissues, such as fruits, seeds, leaves and others
(CARNEIRO et al., 2011). In each cycle, this
increase of plant tissue composes the trunk anatomy
of trees, forming the annual growth zones called
“annual growth rings”. These rings are visible in
some species, allowing to calculate the tree age and
observing the periods of growth variation due to
tree responses to environmental seasonality, such as
precipitation and temperature changes
(FRANZARING et al., 2011).
The biometric value of a given plant tissue is
peculiar to each species (CARNEIRO et al., 2011).
Some species, such as Syzygium, develop showy
fruits (epicarp of intense color) and attractive
mesocarp (high amounts of amino acids) as means
to attract fauna and disperse their seeds, ensuring
greater species propagation (PIO CORREA, 1969).
On the other hand, the Eucalyptus species invest
their metabolic products in the leaves with
allelophatic substances forming a toxic litterfall
hindering the growth of other plant species. Their
aim is to eliminate competition for light and
nutrients in their surroundings (SOUZA et al.,
2004).
In urban planning, when these species are used,
several parameters are evaluated before their use
(SEMENZATO et al., 2011). Positive parameters
(JIM; ZHANG, 2013) such as: i) thermal comfort
by providing shading, and ii) if the trees will be
used as a windbreaker; and negative parameters
(MOLLER; SKOU; KOLLMANN, 2012) such as:
i) branches conflicting with the aerial power grid,
ii) damages to sidewalks by root outcropping, iii)
difficulty for maintenance because of the height,
and iv) attraction of insects and animals due to
fruits and resin that are not measured at planting.
However, for a college campus, these species would
be adequate due to the green spaces between the
buildings. According to the administration office of
the Federal University of Pernambuco
(UFPE/Campus Recife - PCU, 2103), Eucalyptus
grandis were planted on the campus to break winds
and provide shading in green spaces surrounding
the buildings that required the breaking of winds,
such as the central library and laboratory. Syzygium
jambos were planted to provide shading, scenic
beauty and displacement along passages between
the buildings. The tree species were planted in the
late 1940s (1948).
The general objectives of this study were to
investigate two tree species (Eucalyptus grandis
and Syzygium jambos) introduced to the College
Campus of UFPE in the late 1940s, regarding their
age and volume. We also discussed the
implementation of these species into the urban
planning of the campus. The specific objective
were: i) to measure height, diameter, and growth
rings of tree species of Eucalyptus grandis and
Syzygium jambos; ii) to measure growth rings and
determine their age; iii) to calculate their trunk
volume; iv) to analyze the annual increase of the
annual growth of the tree individuals between
2001-2010; v) to relate the age of individuals in
2011 with their respective trunk volume; and vi) to
analyze and recommend the tree individuals of the
species studied on the university campus of
UFPE/Recife.
Danilo Quintas Souto Maior et al.
Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 44
MATERIAL AND METHODS
We conducted the study on campus of the Federal
University of Pernambuco, in the municipality of
Recife, Pernambuco State, Brazil (Figure 1). We
analyzed 80 tree individuals (40 Eucalyptus grandis
Hill ex. Maiden (Myrtaceae)) and 40 Syzygium
jambos L. (Myrtaceae)). To determine their ages,
we collected samples from their trunks using an
increment borer (Haglöf Sweden AB), at 1.3 m high
(DBH), to analyze the growth rings (Figure 2). The
samples were sent for laboratorial analysis, where
they were dehumidified at room temperature,
quantified and the size of the growth rings were
measured using a digital caliper with precision
adjusted to 0.02mm/0.001 and a Binocular
microscope 1000X LM3000B (UFNALSKI, 2005).
We used the method “crossdating” for the
individuals, marking the period for further analysis
(MAXWELL et al., 2011). The analysis was carried
out between 2001 and 2010 (10 years).
Figure 1. Study site and species: A) Eucalyptus grandis and B) Syzygium jambos on campus of the Federal
University of Pernambuco, Recife, Pernambuco State, Brazil.
ANALYSIS OF THE IMPLEMENTATION OF Eucalyptus grandis…
Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 45
Figure 2. A) Sampling method using an increment borer; B) Wood increment removed with an increment borer
showing the growth rings.
The BBH (1.30 m) was measured using a roll-up
tape and the total tree height was calculated in the
referential method (Figure 3). These two variables
were measured (August 2011) to calculate the tree
trunk volume using the following equation
(Equation 1) (ZHOU et al., 2011):
2
2d
Vol h ff
Eq.1
Where: Vol = visible wood volume in the aerial part
of the tree, d = diameter of the trunk circumference
of the tree individuals measured at DBH (1.30m), h
= tree height and ff = shape factor, which
correspond to the ratio between the real volume of
the tree trunk and the volume at DBH and basal
area, which, for the species in our study,
corresponded to 0.51 for E. grandis (ALMEIDA et
al., 2004) and 0.44 for S. jambos (WANG et al.,
2009).
Figure 3. A) Total height estimation for the tree individuals using the referential method and B) DBH measure
using roll-up tape.
We used the hypothesis test of Mann-Whitney to calculate the difference (p value = 95% trust)
Danilo Quintas Souto Maior et al.
Soc. Bras. de Arborização Urbana REVSBAU, Piracicaba – SP, v.8, n.2, p 41‐53, 2013 46
among the sample groups to measure the average
annual increase of the growth rings. The analysis of
regression was carried out between the dependent
variable (y) volume and independent age (x) to
calculate the value of determination coefficient =
R2; significance level = p; equation and error of
fitness for data on the straight. Afterwards, we
analyzed the growth trends on the curves using the
Chow test.
RESULT AND DISCUSSION
Individuals of S. jambos were, on average, twice as
old as those from the E. grandis species (Table 1, p
< 0.0001), and this same value was observed for the
other variables measured (Table 1, p < 0.0001),
suggesting, therefore, the influence of age on the
dendometric variables.
Table 1. Mean and standard deviation of variables for age, diameter, height and volume of the tree individuals
studied in August, 2011.
Species Age (years) DBH (cm) Height (m) Volume (m3)