scholarly journals Evaluation of the condition of dendrological species in Academic park in Belgrade

2016 ◽  
pp. 19-36
Author(s):  
Katarina Mladenović ◽  
Ivan Milenković ◽  
Tatjana Ćirković-Mitrović ◽  
Ljiljana Brašanac-Bosanac

This paper presents the results of the conducted evaluation of the health condition and seed yield of the dendrological species in Academic Park in Belgrade. Both scores for each individual tree and average scores for all trees within each plant genus under observation were analyzed. The health condition of 126 trees belonging 19 genera was examined while the seed yield was assessed for the total of 132 trees. The best as-is health and physiological condition was observed in the following species: nettle trees, honey locusts, pagoda trees, cedars and individual ginkgo and tulip poplar trees. Horse chestnuts, Eastern black walnuts and birch trees proved less resilient to biotic and abiotic damages. Japanese pagoda trees had the best seed yield. There were no significant differences in fruit-bearing between the two years of research, although there were different scores at the individual level. Of all deciduous species recorded, which were prevailing, about 60% had very good seed yield in both years of monitoring, while some 20% of trees bore no fruits. Coniferous trees had higher fruit-bearing score in 2015 (47.4%) than in 2016 (43.0%), whereas about 10% of all conifers bore no fruit at all.

ISRN Forestry ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Edward Missanjo ◽  
Gift Kamanga-Thole ◽  
Vidah Manda

Genetic and phenotypic parameters for height, diameter at breast height (dbh), and volume were estimated for Pinus kesiya Royle ex Gordon clonal seed orchard in Malawi using an ASReml program, fitting an individual tree model. The data were from 88 clones assessed at 18, 23, 30, 35, and 40 years of age. Heritability estimates for height, dbh, and volume were moderate to high ranging from 0.19 to 0.54, from 0.14 to 0.53, and from 0.20 to 0.59, respectively, suggesting a strong genetic control of the traits at the individual level, among families, and within families. The genetic and phenotypic correlations between the growth traits were significantly high and ranged from 0.69 to 0.97 and from 0.60 to 0.95, respectively. This suggests the possibility of indirect selection in trait with direct selection in another trait. The predicted genetic gains showed that the optimal rotational age of the Pinus kesiya clonal seed orchard is 30 years; therefore, it is recommended to establish a new Pinus kesiya clonal seed orchard. However, selective harvest of clones with high breeding values in the old seed orchard should be considered so that the best parents in the old orchard can continue to contribute until the new orchard is well established.


2017 ◽  
Vol 52 ◽  
pp. 43-58 ◽  
Author(s):  
Kaarina S. Reini ◽  
Jan Saarela

Previous research has documented lower disability retirement and mortality rates of Swedish speakers as compared with Finnish speakers in Finland. This paper is the first to compare the two language groups with regard to the receipt of sickness allowance, which is an objective health measure that reflects a less severe poor health condition. Register-based data covering the years 1988-2011 are used. We estimate logistic regression models with generalized estimating equations to account for repeated observations at the individual level. We find that Swedish-speaking men have approximately 30 percent lower odds of receiving sickness allowance than Finnish-speaking men, whereas the difference in women is about 15 percent. In correspondence with previous research on all-cause mortality at working ages, we find no language-group difference in sickness allowance receipt in the socially most successful subgroup of the population.


2020 ◽  
Author(s):  
Aline Canetti ◽  
Evaldo Muñoz Braz ◽  
Patricia Mattos ◽  
Renato Olivir Basso ◽  
Afonso Figueiredo Filho

Abstract BackgroundThis study aimed to develop a procedure to determine which logging diameter would achieve optimal wood production by species, aiming to support sustainable management of the Amazon forest. Two main methodologies of analysis by species were combined: probability density function (PDF) and growth modeling. The growth models were used to derive the volume increment curves at the individual tree level. To detect the points of maximum annual increment in volume at the population tree level we used PDF with adjusted growth equations.ResultsThe population maximum annual volumetric increments occurred in smaller diameters compared to that of the individual-level. When combining shorter cutting cycles with the population biological rotation point considered as the minimum cutting diameter (MCD), we observed higher annual increments in volume than that achieved using the Brazilian law criteria (MCD = 50 cm) or other MCD tested.ConclusionThe procedure proposed may be used by forest managers and forest law-makers, aiming to maximize sustainable wood production in the Amazon forest.


Botany ◽  
2012 ◽  
Vol 90 (1) ◽  
pp. 75-78 ◽  
Author(s):  
Etsuro Takagi ◽  
Katsumi Togashi

Sex change has been recognised in some plants. The sex change in dioecious woody plants includes a monoecious state, which means that the timing of the change is synchronous in branches or shoots but not synchronous among plants, such as in partial dioecious woody plants. To determine whether such a phenomenon is common in woody plants, we investigated the sex expression in two populations of the bird-dispersed, dioecious woody plant Ilex integra Thunb. (Aquifoliaceae), one of the climax forest species in East Asia, over 3 years. No monoecious trees or hermaphrodite flowers were observed. Sex changes were observed at low frequencies, i.e., both female to male and male to female. This study suggests that I. integra may be a complete dioecious woody plant species and that the sex change occurs at the individual level, indicating that the timing of sex change is synchronous in an individual tree.


2020 ◽  
Vol 51 (3) ◽  
pp. 183-198
Author(s):  
Wiktor Soral ◽  
Mirosław Kofta

Abstract. The importance of various trait dimensions explaining positive global self-esteem has been the subject of numerous studies. While some have provided support for the importance of agency, others have highlighted the importance of communion. This discrepancy can be explained, if one takes into account that people define and value their self both in individual and in collective terms. Two studies ( N = 367 and N = 263) examined the extent to which competence (an aspect of agency), morality, and sociability (the aspects of communion) promote high self-esteem at the individual and the collective level. In both studies, competence was the strongest predictor of self-esteem at the individual level, whereas morality was the strongest predictor of self-esteem at the collective level.


2019 ◽  
Vol 1 (1) ◽  
pp. 31
Author(s):  
Fernando Ledesma Perez ◽  
Maria Caycho Avalos ◽  
Juana Cruz Montero ◽  
Andrea Ayala Sandoval

Citizenship is the exercise of the fundamental rights of people in spaces of participation, opinion and commitments, which can not be violated by any health condition in which the individual is. This research aims to interpret the process of construction of citizenship in hospitalized children, was developed through the qualitative approach, ethnomethodological method, synchronous design, with a sample of three students hospitalized in a health institute specializing in childhood, was used Observation technique and a semi-structured interview guide were obtained as results that hospitalized children carry out their citizenship construction in an incipient way, through the communication interaction they make with other people in the environment where they grow up.


2019 ◽  
Vol 37 (1) ◽  
pp. 18-34
Author(s):  
Edward C. Warburton

This essay considers metonymy in dance from the perspective of cognitive science. My goal is to unpack the roles of metaphor and metonymy in dance thought and action: how do they arise, how are they understood, how are they to be explained, and in what ways do they determine a person's doing of dance? The premise of this essay is that language matters at the cultural level and can be determinative at the individual level. I contend that some figures of speech, especially metonymic labels like ‘bunhead’, can not only discourage but dehumanize young dancers, treating them not as subjects who dance but as objects to be danced. The use of metonymy to sort young dancers may undermine the development of healthy self-image, impede strong identity formation, and retard creative-artistic development. The paper concludes with a discussion of the influence of metonymy in dance and implications for dance educators.


Author(s):  
Pauline Oustric ◽  
Kristine Beaulieu ◽  
Nuno Casanova ◽  
Francois Husson ◽  
Catherine Gibbons ◽  
...  

2020 ◽  
Author(s):  
Christopher James Hopwood ◽  
Ted Schwaba ◽  
Wiebke Bleidorn

Personal concerns about climate change and the environment are a powerful motivator of sustainable behavior. People’s level of concern varies as a function of a variety of social and individual factors. Using data from 58,748 participants from a nationally representative German sample, we tested preregistered hypotheses about factors that impact concerns about the environment over time. We found that environmental concerns increased modestly from 2009-2017 in the German population. However, individuals in middle adulthood tended to be more concerned and showed more consistent increases in concern over time than younger or older people. Consistent with previous research, Big Five personality traits were correlated with environmental concerns. We present novel evidence that increases in concern were related to increases in the personality traits neuroticism and openness to experience. Indeed, changes in openness explained roughly 50% of the variance in changes in environmental concerns. These findings highlight the importance of understanding the individual level factors associated with changes in environmental concerns over time, towards the promotion of more sustainable behavior at the individual level.


Sign in / Sign up

Export Citation Format

Share Document