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Статті в журналах з теми "Incentive dispersion"
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Bushman, Robert M., Zhonglan Dai, and Weining Zhang. "Management Team Incentive: Dispersion and Firm Performance." Accounting Review 91, no. 1 (March 1, 2015): 21–45. http://dx.doi.org/10.2308/accr-51112.
Повний текст джерелаАнотація:
ABSTRACT Recent theory suggests that firms incorporate synergistic interrelationships among executives into optimal incentive design (Edmans, Goldstein, and Zhu 2013). We focus on Pay Performance Sensitivities (PPS) and use dispersion in PPS across top executives as a proxy for the incentive design component shaped by an executive team's synergy profile. We model optimal PPS dispersion and use residuals from this model to measure deviations from optimal. We find that firm performance is increasing (decreasing) in the residual when PPS dispersion is too low (too high). We conjecture that deviations from optimal are sustained by adjustment costs, finding that firms only close around 60 percent of the gap between target and actual PPS dispersion over the subsequent year. Viewing a team's equity grants as a vector, we provide evidence that firms use subsequent equity grants to actively manage PPS dispersion toward optimality. Cross-sectional analysis reveals that the deleterious effect of deviations from optimal is decreasing in the duration of a team's tenure together, and increasing in the importance of effort coordination across team members for firm performance. JEL Classifications: M41.
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Forst, Arno, Barry Hettler, and Ran Ron Barniv. "Insider Ownership and Financial Analysts’ Information Environment: Evidence From Dual-Class Firms." Journal of Accounting, Auditing & Finance 34, no. 1 (October 18, 2016): 30–53. http://dx.doi.org/10.1177/0148558x16670048.
Повний текст джерелаАнотація:
We examine the association of insider ownership with financial analysts’ forecast accuracy and dispersion in a sample of U.S. dual-class firms. Insider ownership exerts two effects: a positive incentive effect and a negative entrenchment effect. The lack of significant findings in prior research regarding the association between insider ownership and forecast accuracy may be attributable to the offsetting forces of these two effects. Using a comprehensive hand-collected sample of U.S. firms that maintain more than one class of common stock, we are able to disentangle incentive and entrenchment effects which are confounded in single-class firms. We find that disproportionate insider control is negatively associated with forecast accuracy and positively associated with forecast dispersion. Moreover, insider cash flow rights (insider voting rights) are positively (negatively) associated with forecast accuracy and negatively (positively) associated with forecast dispersion, consistent with incentive-alignment and entrenchment effects of ownership affecting financial analysts’ forecasting environment in opposite directions.
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Urieşi, Sebastian. "Motivational effects of pay dispersion in pay for performance programs implemented in Romanian companies." Management & Marketing 11, no. 2 (July 1, 2016): 431–48. http://dx.doi.org/10.1515/mmcks-2016-0007.
Повний текст джерелаАнотація:
AbstractThe present study investigates the motivational effects in a sample of Romanian employees in private companies that implement pay for performance programs of one of the characteristics of these programs, namely pay dispersion, and on the potential mediating role of organizational justice in these effects. To this aim, we examined the relationships between the amounts of pay dispersion introduced by the respective financial incentive system, employee perceptions of distributive and procedural justice, work motivation, and base salary, respectively. The results of the data analysis, performed through structural equation modeling, support our hypotheses concerning the positive effect of performance – related pay dispersion on motivation and the mediating role of the two dimensions of organizational justice in this effect. Larger financial rewards allocated by the financial incentive system for high performers increase employee perceptions of distributive and procedural justice, which, in turn, foster work motivation. Base salary was also found to influence pay dispersion, as well as perceived distributive justice.
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Lin, Yujie. "Internal & External Pay Dispersion of Executives and Enterprise Innovation." BCP Business & Management 18 (April 13, 2022): 344–54. http://dx.doi.org/10.54691/bcpbm.v18i.572.
Повний текст джерелаАнотація:
Innovation is the source of sustainable development of enterprises. Therefore, its influencing factors have long received extensive attention from academia. This paper takes China's A-share listed companies from 2008 to 2017 as a research sample to examine the relationship between the internal & external pay dispersion of executives and corporate innovation. The results show that: the internal pay dispersion of executives promotes the innovation of the enterprise; the external pay dispersion of the executives inhibits the innovation of the enterprise; the external pay dispersion of the executives enhances the positive effect of the internal executive pay dispersion on the innovation of the enterprise. Further, it is found that compared with non-state-owned enterprises, the internal pay dispersion of state-owned enterprises has a smaller role in promoting the innovation of the enterprise, and the external pay dispersion of executives has a smaller inhibitory effect on the innovation of the enterprise. Executive power enhances the positive effect of the internal pay dispersion on the innovation of the enterprise, and also strengthens the inhibitory effect of the external pay dispersion on the innovation of the enterprise. The above research findings reveal the intrinsic relationship between executive compensation incentive policies and corporate innovation, and provide a theoretical reference for companies to establish efficient incentive mechanisms and promote corporate innovation and development.
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Bianchi, Milo, and Philippe Jehiel. "Bundlers' dilemmas in financial markets with sampling investors." Theoretical Economics 15, no. 2 (2020): 545–82. http://dx.doi.org/10.3982/te3726.
Повний текст джерелаАнотація:
We study banks' incentive to pool assets of heterogeneous quality when investors evaluate pools by extrapolating from limited sampling. Pooling assets of heterogeneous quality induces dispersion in investors' valuations without affecting their average. Prices are determined by market clearing assuming that investors can neither borrow nor short‐sell. A monopolistic bank has the incentive to create heterogeneous bundles only when investors have enough money. When the number of banks is sufficiently large, oligopolistic banks choose extremely heterogeneous bundles, even when investors have little money and even if this turns out to be collectively detrimental to the banks. If, in addition, banks can originate low quality assets, even at a cost, this collective inefficiency is exacerbated and pure welfare losses arise. Robustness to the presence of rational investors and to the possibility of short‐selling is discussed.
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Paczos, Wojtek. "Optimal inflation, monetary integration, and asymmetric sticky prices." Oxford Economic Papers 72, no. 3 (May 15, 2020): 710–30. http://dx.doi.org/10.1093/oep/gpaa008.
Повний текст джерелаАнотація:
Abstract This article explores the optimal rate of trend inflation in open economies with and without a monetary union, accounting for empirically observed differences in the degree of price stickiness across countries. In a closed economy, the optimal inflation rate is negative to offset the markup caused by imperfect competition. In an open economy there is a ‘beggar-thy-neighbour’ incentive and the optimal inflation is positive. Monetary union is globally welfare improving because it removes this externality. In both setups, as price stickiness increases, the degree of price dispersion increases, and the optimal inflation rate tends towards zero. Gains from monetary integration are higher for economies with more flexible prices.
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Żuchowski, Ireneusz, EWA BECK-KRALA, and BEATA KLAJA-GAWEŁ. "MODIFICATIONS IN COMPENSATION PRACTICES IN ORGANIZATIONS REPRESENTING VARIOUS SECTORS IN POLAND." sj-economics scientific journal 27, no. 4 (December 30, 2017): 169–83. http://dx.doi.org/10.58246/sjeconomics.v27i4.95.
Повний текст джерелаАнотація:
The aim of this study was to investigate the main changes that occurred in compensationpractices in organizations representing various sectors in Poland in the last decade. Due to thetransformation, there has been a fundamental change in compensation policies and practices appliedin organizations in Poland. Based on the literature review and the empirical data, the authors explorecompensation practices in Polish organizations prior to transformation and after the fall of the statesocialistregime, as well as after EU integration. The changes concern development of compensationstrategies, increase in salary dispersion, modification of inefficient incentive programs, andsimplification of the internal structure of compensation, which reduces the number of social welfarebenefits. Nonetheless, the most significant transformation concerned compensation took place inemployer and employee mentality.
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Bloom, Nicholas, Erik Brynjolfsson, Lucia Foster, Ron Jarmin, Megha Patnaik, Itay Saporta-Eksten, and John Van Reenen. "What Drives Differences in Management Practices?" American Economic Review 109, no. 5 (May 1, 2019): 1648–83. http://dx.doi.org/10.1257/aer.20170491.
Повний текст джерелаАнотація:
Partnering with the US Census Bureau, we implement a new survey of “structured” management practices in two waves of 35,000 manufacturing plants in 2010 and 2015. We find an enormous dispersion of management practices across plants, with 40 percent of this variation across plants within the same firm. Management practices account for more than 20 percent of the variation in productivity, a similar, or greater, percentage as that accounted for by R&D, ICT, or human capital. We find evidence of two key drivers to improve management. The business environment, as measured by right-to-work laws, boosts incentive management practices. Learning spillovers, as measured by the arrival of large “Million Dollar Plants” in the county, increases the management scores of incumbents. (JEL D22, D24, L25, L60, M11, M50)
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Kang, Tony, Gopal V. Krishnan, Michael C. Wolfe, and Han S. Yi. "The Impact of Eliminating the 20-F Reconciliation Requirement for IFRS Filers on Earnings Persistence and Information Uncertainty." Accounting Horizons 26, no. 4 (December 1, 2012): 741–65. http://dx.doi.org/10.2308/acch-50250.
Повний текст джерелаАнотація:
SYNOPSIS: On November 15, 2007, the U.S. Securities and Exchange Commission (SEC) eliminated the requirement that foreign private issuers reporting under International Financial Reporting Standards (IFRS) include a reconciliation to U.S. GAAP in their 20-F filing. To the extent that the reconciliations had information content, it is possible that the information environment of IFRS filers deteriorated in the post-reconciliation period, unless they voluntarily improved disclosure quality. Using difference-in-differences tests, we examine whether there was any change in the persistence of earnings and analyst forecast dispersion after the new regulation. We find that earnings persistence increased (did not increase) and analyst uncertainty measured by the forecast dispersion did not increase (increased) for firms domiciled in weaker (stronger) investor protection countries. These results suggest that firms from a weaker investor protection environment had a greater incentive to “signal” the quality by voluntarily improving the disclosure quality in the post-reconciliation period to compensate for any possible information loss from no longer providing the reconciliation. Our findings also suggest that the elimination of the reconciliation requirement did not have a uniform effect on IFRS filers and that the effect varies with the firm's home country reporting environment. JEL Classifications: M41
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Halvorsen, Rune, Bjørn Hvinden, and Mi Ah Schoyen. "The Nordic Welfare Model in the Twenty-First Century: The Bumble-Bee Still Flies!" Social Policy and Society 15, no. 1 (April 8, 2015): 57–73. http://dx.doi.org/10.1017/s1474746415000135.
Повний текст джерелаАнотація:
The Nordic countries are admired for high employment, low levels of poverty and inequality, encompassing welfare states, and peaceful industrial relations. Yet the model is criticised for hampering the employment opportunities of vulnerable groups. The literature identifies several potential mechanisms of exclusion. Compressed wage structures may make employers reluctant to hire certain workers for fear that their productivity is too low to justify the cost. Second, generous benefits lower individuals’ incentive to work. Third, businesses increasingly specialise in high-skill activities. We explore these arguments comparatively by considering the employment chances of two vulnerable groups: disabled persons and migrants. The Nordic countries are compared with other rich democracies that take different approaches to social protection and wage dispersion. The Nordic countries do not perform systematically worse than other ‘varieties of capitalism’. In line with recent research, we also find that there is considerable intra-Nordic variation, which calls for further study.
Дисертації з теми "Incentive dispersion"
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Kurdi, Heba. "The impact of minimum wages on the incentives of education for the youth." Thesis, Linnéuniversitetet, Institutionen för nationalekonomi och statistik (NS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-67217.
Повний текст джерелаАнотація:
The purpose of this thesis is to investigate the incentives regarding the education decisions, resulting from a minimum wage over the period 2005-2014. The question is investigated by comparing the changes in the wage dispersion and upper secondary graduation rate in 17 OECD countries. And then, by comparing the changes in the bites of the minimum wage and educational attainment for upper secondary students in 11 OECD countries, where minimum wages are regulated by law. The majority of previous research seem to point out a negative educational effect of minimum wages. However, this paper finds no evidence that increasing the minimum wage can decrease the high school graduation rate. A possible explanation is that the correlation between the higher employment prospect and educational attainment can create incentives for young individuals to undergo education. This study seems to be the first to investigate the educational effects of minimum wages using internationally comparative data.
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Xu, Lizhen Ph D. "Economic analysis of search advertising : price competition, bidding incentive, consumer search, and information structure." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-3719.
Повний текст джерелаАнотація:
This dissertation performs economic analysis of search advertising from a comprehensive picture of the competition facing advertisers---by incorporating the price competition to endogenously investigate advertisers' bidding incentive, and taking into account consumers' online search and the unique information structure associated with the search advertising format. It consists of three essays based on game-theoretic modeling. The first essay studies the oligopolistic price competition among advertisers placed in different advertising positions, considering distinctive features of consumers’ online search behaviors. We find an interesting local-competition pattern in which direct price competition occurs only between advertisers adjacent to each other. The second essay integrates the price competition into the bidding competition and investigates the endogenous bidding incentives of advertisers with different competitive strengths. Surprisingly, we find that an advertising position with a better exposure may not always be profitable for the advertisers with competitive advantage, even if it is cost free. We also show that the bidding outcome might not align with the relative competitive strength. The third essay further considers the effects of organic listing as a competing information source on the sponsored bidding competition and the outcome performances in search advertising. It provides answers to questions such as whether and why advertisers with sufficient exposure from the organic list may still be willing to bid for top sponsored positions, and how the existence of organic listing affects search engine’s revenue, consumer surplus, and social welfare.text
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Jaroenjitrkam, Anutchanat. "Strategic Responses of Firms to Product Market Competition." Thesis, 2019. http://hdl.handle.net/2440/121731.
Повний текст джерелаАнотація:
This thesis examines firms’ strategies in response to more intensified product market competition. Specifically, three studies analyse: (i) the incentive dispersion within a top management team (TMT); (ii) the relative compensation of the CEO to the compensation of other top executives; and (iii) corporate complexity. These strategies are associated with cooperation among the TMT, the CEO’s power, and corporate complexity. The results from the first study demonstrate that TMT incentive dispersion decreases when firms experience intense competition in the product market and this effect is more pronounced for innovative and diversified firms. The implication is that firms promote cooperation in the team by reducing TMT incentive dispersion when facing pressure from product market competition and that cooperation in the TMT is even more essential for firms operating in a dynamic environment, which requires quick responses. The second study reveals that the compensation disparity between the CEO and other management drops, implying less CEO power when product market competition becomes more intensified, and the impact is stronger for firms with weak corporate governance and “good luck.” The results suggest that when powerful CEOs are entrenched, product market competition can act as a substitute for corporate governance and reins in the power of CEOs. The third study shows that corporate complexity reduces firm performance when firms face increased competition in the product market. Corporate complexity can be related to the inefficiency of resource allocation as the impact of the interaction between corporate complexity and product market competition is more prominent for firms that have strong financial needs but cannot easily access capital. From a theoretical perspective, the results of this thesis show how social comparison theory, agency costs, and resource allocation issues can explain the strategic choices that firms make in response to product market competition in order to stimulate cooperation in TMT, control CEO power, and enhance flexibility and efficiency, respectively.Thesis (Ph.D.) -- University of Adelaide, Business School, 2019
Книги з теми "Incentive dispersion"
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Efficiency wages: Models of unemployment, layoffs and wage dispersion. Chur: Harwood Academic, 1990.
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Efficiency wages: Models of unemployment, layoffs, and wage dispersion. Princeton, N.J: Princeton University Press, 1990.
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Weiss, Andrew. Efficiency wages: Models of unemployment, layoffs, and wage dispersion. Oxford: Clarendon Press, 1991.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion. Princeton University Press, 2014.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion. Princeton University Press, 2014.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion. Princeton University Press, 2016.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion. Princeton University Press, 2014.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion (Princeton Paperbacks). Princeton Univ Pr, 1991.
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Weiss, Andrew. Efficiency Wages: Models of Unemployment, Layoffs, and Wage Dispersion (Princeton Paperbacks). Princeton Univ Pr, 1991.
Знайти повний текст джерелаЧастини книг з теми "Incentive dispersion"
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Mandal, Chhanda, and Anita Chattopadhyay Gupta. "A Comparative Study on World-Wide Carbon Emission Convergence." In Handbook of Research on Global Indicators of Economic and Political Convergence, 430–47. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-5225-0215-9.ch019.
Повний текст джерелаАнотація:
Environmental issue is one of the primary concerns in present global scenario for developed as well as developing countries and reducing the emission level of greenhouse gases is the common objective for all. Study of per capita carbon emission convergence is quite significant in the ongoing debate of climate change policy formulation and implementation as future emission level can only decide the incentive to shift to the clean technology. With a balanced panel of 79 countries and 50 years, over 1960-2009, we have tested for both sigma and beta convergence. The data exhibits a possible convergence in carbon emission. The countries are disaggregated twice, first into OECD and Non-OECD countries and then into five categories on the basis of income. OECD countries show absolute and conditional beta convergence, also with sigma convergence. Countries from lower income group have a lower degree of variability in dispersion in the time period being considered. The set of explanatory variables in this analysis are real GDP per capita, population growth rate and trade openness.
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Mandal, Chhanda, and Anita Chattopadhyay Gupta. "A Comparative Study on World-Wide Carbon Emission Convergence." In Natural Resources Management, 779–96. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-0803-8.ch036.
Повний текст джерелаАнотація:
Environmental issue is one of the primary concerns in present global scenario for developed as well as developing countries and reducing the emission level of greenhouse gases is the common objective for all. Study of per capita carbon emission convergence is quite significant in the ongoing debate of climate change policy formulation and implementation as future emission level can only decide the incentive to shift to the clean technology. With a balanced panel of 79 countries and 50 years, over 1960-2009, we have tested for both sigma and beta convergence. The data exhibits a possible convergence in carbon emission. The countries are disaggregated twice, first into OECD and Non-OECD countries and then into five categories on the basis of income. OECD countries show absolute and conditional beta convergence, also with sigma convergence. Countries from lower income group have a lower degree of variability in dispersion in the time period being considered. The set of explanatory variables in this analysis are real GDP per capita, population growth rate and trade openness.
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H. El-Moayed, Mohamed, Justin Kühn, Sea-Hyun Lee, Mahmoud Farag, and Sherif Mehanny. "Potential of Lignin Valorization with Emphasis on Bioepoxy Production." In Lignin - Chemistry, Structure, and Application [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108263.
Повний текст джерелаАнотація:
Lignin is the second most abundant natural polymer after cellulose. It has high molecular weight and poor dispersity, which lowers its compatibility with other polymeric materials. Accordingly, it is hard to integrate lignin into polymer-based applications in its native form. Recently, lignin valorization, which aims to boost lignin value and reactivity with other materials, has captured the interest of many researchers. The volatility of oil and gas prices is one strong incentive for them to consider lignin as a potential replacement for many petroleum-based materials. In this chapter, lignin valorization processes, namely hydrogenolysis, pyrolysis, hydro-thermal liquefaction, and hydro-thermal carbonization, are discussed in brief. The chapter also discusses the synthesis of lignin-based epoxy resin as an already existing example of a lignin-based product.
Тези доповідей конференцій з теми "Incentive dispersion"
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Joaquim Faustino, Fausta, Erick Alberto Somocurcio Holguín, and Joel David Melo Trujillo. "Cenários de emissões de carbono para os táxis elétricos e verdes utilizando movimento geométrico browniano." In Simpósio Brasileiro de Sistemas Elétricos - SBSE2020. sbabra, 2020. http://dx.doi.org/10.48011/sbse.v1i1.2361.
Повний текст джерелаАнотація:
No atual cenário de preocupação pelas mudanças climáticas, diversos governos tem incentivado a mobilidade elétrica nas grandes metrópoles. A partir desses incentivos, algumas empresas de frotas de táxis têm começado a incorporar veículos elétricos. Porém, em alguns países, a penetração de táxis elétricos pode concorrer com outras fontes como: álcool e gás natural, sendo estes conhecidos como táxis verdes pois contribuem com a diminuição de gases poluentes. Assim, os planejadores precisam a criação de cenários de emissões de carbono, a fim de mensurar os impactos no planejamento energético para esse tipo de transporte. Os valores dessas emissões estão em função das viagens realizados pelos táxis. Em geral, no cálculo anual de emissões se consideram um número médio do total de viagens, percorrendo uma quantidade média de quilômetros. No entanto, o total de viagens no horizonte pode ser alterado pela variação nos valores de penetração de veículos elétricos. Igualmente, o total de viagens pode apresentar volatilidade ou dispersão por causa do trânsito urbano. Com o intuito de criar cenários de emissões, nestetrabalho se apresenta uma metodologia fundamentada no movimento geométrico browniano que considera a variação no número de viagens e dispersão das viagens durante o horizonte de análise. Os resultados da proposta são curvas que mostram os valores máximos e mínimos das emissões esperadas para os táxis elétricos e verdes em cada ano analisado. Tais resultados podem ajudar aos planejadores a definir políticas energéticas para os incentivos aos taxis elétricos e verdes, assim como, os impactos ambientais e econômicos no país.
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Mona´rdez, Patricio, Hugo Acun˜a, and Doug Scott. "Evaluation of the Potential of Wave Energy in Chile." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57887.
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In Chile, incentives have been created during the past years for the installation of non-conventional renewable energy plants (NCRE). It is within this context that wave energy can be transformed into a feasible alternative for electrical power generation in the near future within the country. This work corresponds to the first approach to quantify the wave energy resources in Chile based in a technically superior manner. The first step in the assessment of a wave energy plant is to quantify the available resources, therefore the wave climate was obtained for various sites along the Chilean coastline and a deterministic assessment was made of the power of the waves and their main characteristics, especially the variability under different time horizons. In order to convert the mechanical energy of the waves into electrical power, an assessment was made of various offshore devices existing on the market. An estimate was made of the output power of these conversion devices based on the wave climate and on the energy conversion matrixes that define them, performing an analysis that is completely analogue to that of wave power. Waves in the Chilean coast arrive year in and year out with scarce variation during the various seasons, are very regular, with low directional dispersion and high periods. This determines the low seasonal variability of the power and the high capacity factors that conversion devices can develop. The characteristics of waves in Chile are due mainly to the presence of swell usually found in great oceans, which makes Chilean territory one of the most appropriate sites in the world for the generation of electrical power with energy from the waves.
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Petrentchuk, Lauro William, Jocieli Mileski Bueno, and Thuany Aparecida Lewandoski Jansen. "IDENTIFICAÇÃO E CADASTRAMENTO DE ÁRVORES DA FAMÍLIA MYRTACEAE NA REGIÃO DE CANOINHAS (SC): A OCORRÊNCIA DE CURITIBA PRISMATICA NA FLONA DE TRÊS BARRAS-SC." In I Congresso Nacional On-line de Conservação e Educação Ambiental. Revista Multidisciplinar de Educação e Meio Ambiente, 2021. http://dx.doi.org/10.51189/rema/1712.
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Introdução: Mirtáceas compreendem um grupo com cerca de 140 gêneros ocorrendo em toda América do Sul. Algumas espécies representantes desta família possuem ocorrência característica nas matas de pinhais. Objetivo: A diversidade de representantes da família myrtaceae é grande e que muitas espécies desta família possuem apelo comercial, realizou-se a identificação e o cadastramento e árvores matrizes da família myrtaceae com potencial de produção de sementes e mudas na região de Canoinhas-SC. Material e métodos: As coletas de informações a campo ocorreram em fragmentos florestais nativos na região de Canoinhas onde localiza-se também a FLONA de Três Barras-SC. As informações coletadas a campo ocorreram semanalmente de março a junho de 2021. Através de formulário específico, coletou-se informações sobre as árvores (diâmetro, espécie, estado fitossanitário, presença de flores, frutos, etc.). Com auxílio de GPS efetuou-se a marcação de cada indivíduo, e posteriormente realizado o processamento Google Earth e em planilha Excel para compor um cadastro e mapeamento da ocorrência destas matrizes. Resultados: Na FLONA contatou-se pouca ocorrência de Eugenia uniflora e Eugenia pyriformis e praticamente a ausência de Campomanesia xanthocarpa, porém uma grande ocorrência natural de Curitiba prismática. A densidade observada em um fragmento florestal, é de cerca de 4 indivíduos a cada 10m², observada em uma parcela de 400m². Algumas árvores apresentam porte adulto, podendo serem utilizadas como matrizes, tendo em vista que a frutificação e dispersão de sementes mostra-se bem evidente dentro da floresta. Conclusão: Até o presente momento, que houveram poucas matrizes localizadas e cadastradas de outras myrtaceaes. O que é perceptível na FLONA é a grande ocorrência de Curitiba prismatica, e que nos fragmentos estudados na região como um todo, existem grande quantidade de indivíduos desta espécie, porém em sua grande maioria ainda em fase jovem e não reprodutiva, limitando a indicação como matrizes. Assim sendo, frente a algumas afirmações aqui expostas de forma breve, vê-se a necessidade de incentivo a continuidade da pesquisa em fragmentos florestais da região para a busca de matrizes para produção de mudas.
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Santos, Ariane Marieli dos, Ana Carolina Buzzo Marcondelli, and Olavo Nardy. "CARACTERIZAÇÃO FLORÍSTICA E FITOSSOCIOLÓGICA DE DOIS FRAGMENTOS FLORESTAIS NO MUNICÍPIO DE ARARAQUARA - SP." In I Congresso Brasileiro On-line de Estudos Ecológicos. Revista Multidisciplinar de Educação e Meio Ambiente, 2021. http://dx.doi.org/10.51189/rema/2681.
Повний текст джерелаАнотація:
Introdução: O uso e ocupação do solo de forma superior a capacidade de regeneração do meio, vem ocasionando a intensificação das paisagens fragmentadas, resultando na disfunção dos processos ecossistêmicos. Levantamentos fitossociológicos, florísticos e estruturais de remanescentes auxiliam na análise horizontalizada e verticalizada da paisagem e compreensão do comportamento e potencialidade das espécies, contribuindo para elaboração de projetos de recuperação de áreas degradadas, de políticas públicas, distribuição e controle de recursos, entre outros. A necessidade de monitoramento e controle dos remanescentes e incentivo à conservação e preservação reforça a importância deste trabalho de fornecer ferramentas e dados para auxiliar na adequação dos planejamentos regionais e identificação de áreas potenciais de proteção ambiental. Objetivos: Diagnóstico de dois fragmentos da UGRHI-09 Mogi-Guaçu no município de Araraquara. Material e métodos: Foram amostrados dois fragmentos florestais ao norte do município. Em cada um, foram realizadas coletas florísticas nas bordas e em trilhas internas; definidas linhas para os Pontos-Quadrantes para fitossociologia (janeiro-junho/2021). As espécies e fragmentos foram qualificadas por síndrome de dispersão, estágio sucessional e fitofisionomia. Resultados: Foram registradas 58 espécies de 38 famílias, sendo Fabaceae a mais representativa, 10 espécies, e 31 famílias com apenas uma. Ambos os pontos apresentaram aproximadamente 40% de espécies pioneiras e 57% secundárias, maior porcentagem para zoocoria (67%; 60%). Também apresentaram mais espécies associadas a Cerrado e Floresta Estacional Semidecidual (63%; 57%), seguidas de espécies exclusivas de Cerrado (28%; 35%).Conclusão: Os pontos foram diagnosticados como áreas de transição entre Cerrado e Floresta Estacional Semidecidual, em estágio secundário de regeneração e com potencial de preservação devido alto índice de espécies raras e pioneiras, perfeitas para regeneração passiva do entorno e reflorestamento de outros locais através da produção de mudas. A manutenção dos estágios sucessionais é promovido pelas queimadas, mas, quando sob efeito de borda, a regeneração tem seu desempenho afetado ou interrompido. As funções específicas proporcionadas por cada fitofisionomia fazem necessárias a revisão de sistemas de classificação universais estruturais da vegetação, que excluem sua heterogeneidade, levando a erros de uso e distribuição de terras, planejamentos ambientais e aplicação de políticas públicas mal delineadas, resultando na intensificação dos impactos ambientais.