BEHAVIOR OF THE DIAMETRIC DISTRIBUTION OF ECOLOGICAL GROUPS IN A MIXED OMBROPHILOUS FOREST FRAGMENT

The Mixed Ombrophilous Forest is one of the most threatened ecosystems in Brazil. It is thus necessary to understand its dynamics of growth over time so that sustainable use and conservation management strategies be proposed. The objective of this study is to evaluate the behavior of the diametric distribution of two pioneer and non-pioneer ecological groups in a fragment of Mixed Ombrophilous Forest considering four years of evaluations: from 2002 to 2017. Exponential, Gamma, Weber and Weibull 3P density probability functions were adjusted. The diametric behavior of the forest and the ecological groups analyzed remained negative exponentially, being a characteristic of natural forests. The distributions that best adjusted were Weibull 3P for the forest as a whole and for the group of pioneers, and Weber for non-pioneers. We concluded that ecological groups have the same pattern of diametric distribution as the forest as a whole. However, different forest management strategies are necessary considering the intrinsic characteristics of each group.

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Earthworms as indicators for different forest management types and human disturbance in Ilam oak forest, Iran

Folia Forestalia Polonica ◽

10.2478/ffp-2014-0013 ◽

2014 ◽

Vol 56 (3) ◽

pp. 121-134 ◽

Cited By ~ 5

Author(s):

Mehdi Heydari ◽

Hassan Poorbabaei ◽

Masoud Bazgir ◽

Ali Salehi ◽

Javad Eshaghirad

Keyword(s):

Forest Management ◽

Conservation Management ◽

Management Strategies ◽

Principal Component ◽

Tree Canopy ◽

Management Approach ◽

Natural Ecosystems ◽

Positive Direction ◽

Clear Cutting ◽

The World

Abstract There has been observed widespread destruction of natural ecosystems around the world due to population growth, land use change and clear cutting which have affected soil properties. Different management strategies have been so far implemented to reduce this crisis in various regions of the world, such as e.g. short-term and long-term conservation management in the Zagros region. However, any management approach should be evaluated with appropriate measures to determine how managed areas respond. The main objective of the present study was to evaluate the potential of earthworms as an indicator for different forest management strategies and human disturbances in Zagros oak (Quercus persica Jaub. and Spach) forest. The sites selected included undisturbed one as the control (Un), the sites under five-year conservation management (FCM) and twenty-year conservation management (TCM) as well as the disturbed site (D). The results of principal component analysis (PCA) showed that different regions separated into the components: PC1 and PC2. Un and TCM sites gathered together and represented higher values of the factors such as pH, Kavailable, OC, clay content, Pavailable, CEC, overstory tree canopy, Ntot, biomass and abundance of earthworms. The positive direction of the first axis reflected a gradient of EC, BD and Ptot. According to the logistic model, NH4-N and EC played the most important role in earthworm presence and absence in Zagros forest ecosystem. Earthworm abundance and biomass could be a good indicator to evaluate different forest management strategies in the study area.

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Dynamics of natural regeneration after disturbance in a remnant of Mixed Ombrophilous Forest in southern Brazil

Ambiente e Agua - An Interdisciplinary Journal of Applied Science ◽

10.4136/ambi-agua.2679 ◽

2021 ◽

Vol 16 (3) ◽

pp. 1

Author(s):

Alyne Regina Ruggiero ◽

Lauri Amândio Schorn ◽

Kristiana Fiorentin dos Santos ◽

Tatiele Anete Bergamo Fenilli

Keyword(s):

Natural Regeneration ◽

Floristic Composition ◽

Ecological Groups ◽

Pioneer Species ◽

Southern Brazil ◽

Forest Fragment ◽

Healing Phase ◽

Successional Species ◽

Ombrophilous Forest ◽

Over 40 Years

This study evaluated changes in the structure for remnant Mixed Ombrophilous Forest recovering from logging, which ceased over 40 years ago. Regarding the dynamics of the floristic composition of natural regeneration, 18 species remained (23.38% of the total) and 27 new species entered (35.06% of the total). The greatest increases were observed for Allophylus edulis, Myrsine umbellata, and Miconia cinerascens. When analyzing the dynamics of regeneration in ecological groups, it was observed that pioneer species had a similar value in both surveys (29.4% and 29.6%); secondary species decreased from 56.6% to 52.8%, and late-successional species increased from 0.2% to 6.0%. Therefore, the forest fragment studied is in a healing phase after disturbance, characterized by the increased regeneration of pioneer species as a result of sufficient light entering the interior of the forest.

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STRUCTURE AND FLORISTIC COMPOSITION IN A DENSE OMBROPHILOUS FOREST AREA UNDER FOREST MANAGEMENT

FLORESTA ◽

10.5380/rf.v49i4.59264 ◽

2019 ◽

Vol 49 (4) ◽

pp. 793

Author(s):

Yasmim Andrade Ramos ◽

Bruno Aurélio Campos Aguiar ◽

Marcos Vinicius Cardoso Silva ◽

Renata Elaine Siqueira Matos ◽

Maria Cristina Bueno Coelho ◽

...

Keyword(s):

Forest Management ◽

Diversity Index ◽

Floristic Composition ◽

Timber Production ◽

Floristic Diversity ◽

Forest Fragment ◽

Floristic Similarity ◽

Breast Height ◽

Ombrophilous Forest ◽

Dense Ombrophilous Forest

This study shows the phytosociology and floristics of a Dense Ombrophilous Forest fragment under forest management in Portel city, Pará State. Six conglomerates were sampled, divided into secondary and tertiary plots totaling 120 sample units of 0.4 hectares each, in which all trees with diameter at breast height (130 cm above ground; DBH) above 10 cm were measured. These individuals were botanically identified, and evenness and floristic similarity were calculated. There were 3,586 individuals distributed in 42 families, 121 genera, and 174 species. Families Fabaceae, Lecythidaceae, and Sapotaceae were the ones that obtained the highest IVI and the highest representativity of individuals. Species Eschweilera coriacea (DC.) S.A.Mori, Vouacapoua americana Aubl., and Tetragastris altissima (Aubl.) Swart were the ones with the highest IVI. Among the ten highest results, we highlight Syzygiopsis oppositifolia Ducke and Manilkara dardanoi Ducke, with great potential for timber production. The Shannon diversity index averaged 3.83 between the plots, and the Pielou evenness averaged 0.84, showing that the area presents high floristic diversity and great potential for forest management activities.

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Policy Landscape for Customary Forest Management in the Philippine Cordilleras

Philippine Journal of Public Policy: Interdisciplinary Development Perspectives ◽

10.54096/uqay7118 ◽

2021 ◽

Vol 2021 ◽

Author(s):

Leah Abayao

Keyword(s):

Forest Management ◽

Local Community ◽

Sustainable Forest Management ◽

Local Governance ◽

Management Strategies ◽

The Philippines ◽

Natural Forests ◽

Community Forests ◽

Collective Ownership ◽

Customary Practices

Forest management strategies in the Philippines recognize the cultural attributes of forests and customary practices accorded to them. Local communities view forests as an essential and contiguous resource. The Philippine Cordilleras is home to local community forests, natural and man-made or built. Natural forests are held collectively and managed according to customary practices. Man-made forests are developed by kin groups. These are small patches of forests that when surveyed make up a significant portion of the community’s natural resources. The “principle of collective ownership of forests” and the “customary tenurial security” are important principles in sustainable forest management in the Philippine Cordilleras. Agencies and local government units (LGUs) are challenged to strengthen their capacity to proactively encourage contemporary customary principles and practices to be used alongside official processes. These customary principles, when used within existing platforms, will prepare communities to face issues that affect their customary forests. Forests in some parts of the Cordilleras are tenured customarily, and such tenure comes with responsibility under the customary regime. The customary regime needs to be given equal attention in official processes to strengthen and effectively enforce forest local governance.

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Towards sustainable forest management strategies with MOEAs

Proceedings of the 2020 Genetic and Evolutionary Computation Conference ◽

10.1145/3377930.3389837 ◽

2020 ◽

Author(s):

Philipp Back ◽

Antti Suominen ◽

Pekka Malo ◽

Olli Tahvonen ◽

Julian Blank ◽

...

Keyword(s):

Forest Management ◽

Sustainable Forest Management ◽

Management Strategies

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Augmenting the Clinical Data Sources for Enigmatic Diseases: A Cross-Sectional Study of Self-Tracking Data and Clinical Documentation in Endometriosis

Applied Clinical Informatics ◽

10.1055/s-0040-1718755 ◽

2020 ◽

Vol 11 (05) ◽

pp. 769-784

Author(s):

Ipek Ensari ◽

Adrienne Pichon ◽

Sharon Lipsky-Gorman ◽

Suzanne Bakken ◽

Noémie Elhadad

Keyword(s):

Additional Data ◽

Intraclass Correlation ◽

Management Strategies ◽

The Self ◽

Self Management ◽

Cross Sectional ◽

Two Samples ◽

Data Source ◽

Daily Function ◽

Over Time

Abstract Background Self-tracking through mobile health technology can augment the electronic health record (EHR) as an additional data source by providing direct patient input. This can be particularly useful in the context of enigmatic diseases and further promote patient engagement. Objectives This study aimed to investigate the additional information that can be gained through direct patient input on poorly understood diseases, beyond what is already documented in the EHR. Methods This was an observational study including two samples with a clinically confirmed endometriosis diagnosis. We analyzed data from 6,925 women with endometriosis using a research app for tracking endometriosis to assess prevalence of self-reported pain problems, between- and within-person variability in pain over time, endometriosis-affected tasks of daily function, and self-management strategies. We analyzed data from 4,389 patients identified through a large metropolitan hospital EHR to compare pain problems with the self-tracking app and to identify unique data elements that can be contributed via patient self-tracking. Results Pelvic pain was the most prevalent problem in the self-tracking sample (57.3%), followed by gastrointestinal-related (55.9%) and lower back (49.2%) pain. Unique problems that were captured by self-tracking included pain in ovaries (43.7%) and uterus (37.2%). Pain experience was highly variable both across and within participants over time. Within-person variation accounted for 58% of the total variance in pain scores, and was large in magnitude, based on the ratio of within- to between-person variability (0.92) and the intraclass correlation (0.42). Work was the most affected daily function task (49%), and there was significant within- and between-person variability in self-management effectiveness. Prevalence rates in the EHR were significantly lower, with abdominal pain being the most prevalent (36.5%). Conclusion For enigmatic diseases, patient self-tracking as an additional data source complementary to EHR can enable learning from the patient to more accurately and comprehensively evaluate patient health history and status.

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Farmers’ and Herders’ Perceptions on Rangeland Management in Two Agroecological Zones of Benin

Land ◽

10.3390/land10040425 ◽

2021 ◽

Vol 10 (4) ◽

pp. 425

Author(s):

Rodrigue Vivien Cao Diogo ◽

Luc Hippolyte Dossa ◽

Sèyi Fridaïus Ulrich Vanvanhossou ◽

Badirou Dine Abdoulaye ◽

Kossi Hélliot Dosseh ◽

...

Keyword(s):

Natural Resources ◽

Management Strategies ◽

Sustainable Use ◽

Negative Attitude ◽

Rangeland Management ◽

Mineral Fertilization ◽

The North ◽

Unused Land ◽

Agroecological Zones ◽

Sound Management

The sustainable use of rangelands in pastoral areas requires the inclusion of all stakeholders to develop sound management strategies. However, the role of these actors in the sustainable management of natural resources is still poorly understood. The present study aims to (i) assess the perception of farmers and herders of the risks and opportunities of transhumance on rangeland resource use and management, and to (ii) generate useful knowledge for the design and implementation of policies that favor the coexistence of these actors and reduce competition over rangeland resources use in Benin. To this end, interviews were conducted with 240 crop farmers and herders using a semi-structured questionnaire in two contrasting agroecological zones in the northern (Kandi) and the southern (Kétou) part of the country. Among the respondents, 64% of farmers in the North were agro-pastoralists (owning 10.6 ha of land and 10.7 cattle) and 36% were herders (keeping 45.8 cattle and cultivating about 3.7 ha of land). They perceived that communal rangelands were entirely degraded. In the South, 36% of respondents were agro-pastoralists (with 0.3 cattle and farming 4 ha of land) and 64% cattle herders (raising 45.3 cattle and farming 0.9 ha of land only). Of the herders, 50% kept cattle for more than 20 years, while agro-pastoralists had no previous experience in cattle herding. Cultivation practices among crop farmers, such as high use of mineral fertilization (23.8%) and bush fires for land clearing (22.5%), were reported in Kandi (North) and Kétou (South) as factors that might contribute to land degradation. However, these farmers perceived transhumance as a threat to the sustainable use of natural resources. In contrast, herders perceived transhumance as an opportunity to valorize unused land and increase the availability of manure to cropland. The prevalent negative attitude of crop farmers regarding transhumant herders increases the vulnerability of cattle herding in both regions. There is an urgent need of raising awareness concerning the mutual benefits provided by the coexistence of crop farmers with herders to promote participative rangeland management strategies. This may contribute towards coping with the current challenges of food insecurity and increasing climate variability as well as to reducing recurrent conflicts in the region.

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Higher stand densities can promote soil carbon storage after conversion of temperate mixed natural forests to larch plantations

European Journal of Forest Research ◽

10.1007/s10342-020-01346-9 ◽

2020 ◽

Author(s):

Meng Na ◽

Xiaoyang Sun ◽

Yandong Zhang ◽

Zhihu Sun ◽

Johannes Rousk

Keyword(s):

Forest Management ◽

Soil Carbon ◽

Stand Density ◽

C Sequestration ◽

Tree Density ◽

Natural Forests ◽

Soil C ◽

C Storage ◽

Soil C Storage ◽

Soil C Sequestration

AbstractSoil carbon (C) reservoirs held in forests play a significant role in the global C cycle. However, harvesting natural forests tend to lead to soil C loss, which can be countered by the establishment of plantations after clear cutting. Therefore, there is a need to determine how forest management can affect soil C sequestration. The management of stand density could provide an effective tool to control soil C sequestration, yet how stand density influences soil C remains an open question. To address this question, we investigated soil C storage in 8-year pure hybrid larch (Larix spp.) plantations with three densities (2000 trees ha−1, 3300 trees ha−1 and 4400 trees ha−1), established following the harvesting of secondary mixed natural forest. We found that soil C storage increased with higher tree density, which mainly correlated with increases of dissolved organic C as well as litter and root C input. In addition, soil respiration decreased with higher tree density during the most productive periods of warm and moist conditions. The reduced SOM decomposition suggested by lowered respiration was also corroborated with reduced levels of plant litter decomposition. The stimulated inputs and reduced exports of C from the forest floor resulted in a 40% higher soil C stock in high- compared to low-density forests within 8 years after plantation, providing effective advice for forest management to promote soil C sequestration in ecosystems.

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Forest management strategies for dealing with fire-related uncertainty when managing two forest seral stages

Canadian Journal of Forest Research ◽

10.1139/x10-212 ◽

2011 ◽

Vol 41 (2) ◽

pp. 309-320 ◽

Cited By ~ 12

Author(s):

David W. Savage ◽

David L. Martell ◽

B. Mike Wotton

Keyword(s):

Forest Management ◽

Simulation Model ◽

Sustainable Forest Management ◽

Management Strategies ◽

Fire Regimes ◽

Analysis Tool ◽

Planning Model ◽

Minimum Area ◽

Forest Management Planning ◽

Planning Models

Ecological values are an important aspect of sustainable forest management, but little attention has been paid to maintaining these values when using traditional linear programming (LP) forest management planning models in uncertain planning environments. We embedded an LP planning model that specifies when and how much to harvest in a simulation model of a “managed” flammable forest landscape. The simulation model was used to evaluate two strategies for dealing with fire-related uncertainty when managing mature and old forest areas. The two seral stage areas were constrained in the LP planning model to a minimum of 10% of the total forest area and the strategies were evaluated under four representative fire regimes. We also developed a risk analysis tool that can be used by forest managers that wish to incorporate fire-related uncertainty in their decision-making. We found that use of the LP model would reduce the areas of the mature and old forest to their lower bound and fire would further reduce the seral areas below those levels, particularly when the mean annual burn fraction exceeds 0.45% per annum. Increasing the minimum area required (i.e., the right-hand side of the constraint) would increase the likelihood of satisfying the minimum area requirements.

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The influence of microhabitat on the population dynamics of four herbaceous species in a semiarid area of northeastern Brazil

Brazilian Journal of Biology ◽

10.1590/1519-6984.10014 ◽

2016 ◽

Vol 76 (1) ◽

pp. 45-54 ◽

Cited By ~ 2

Author(s):

K. A. Silva ◽

J. M. F. F. Santos ◽

J. R. Andrade ◽

E. N. Lima ◽

U. P. Albuquerque ◽

...

Keyword(s):

Population Dynamics ◽

Population Size ◽

Mortality Rates ◽

Dry Forest ◽

Northeastern Brazil ◽

Annual Rainfall ◽

Herbaceous Species ◽

Forest Fragment ◽

Experimental Station ◽

Over Time

Abstract Variation in annual rainfall is considered the most important factor influencing population dynamics in dry environments. However, different factors may control population dynamics in different microhabitats. This study recognizes that microhabitat variation may attenuate the influence of climatic seasonality on the population dynamics of herbaceous species in dry forest (Caatinga) areas of Brazil. We evaluated the influence of three microhabitats (flat, rocky and riparian) on the population dynamics of four herbaceous species (Delilia biflora, Commelina obliqua, Phaseolus peduncularis and Euphorbia heterophylla) in a Caatinga (dry forest) fragment at the Experimental Station of the Agronomic Research Institute of Pernambuco in Brazil, over a period of three years. D. biflora, C. obliqua and P. peduncularis were found in all microhabitats, but they were present at low densities in the riparian microhabitat. There was no record of E. heterophylla in the riparian microhabitat. Population size, mortality rates and natality rates varied over time in each microhabitat. This study indicates that different establishment conditions influenced the population size and occurrence of the four species, and it confirms that microhabitat can attenuate the effect of drought stress on mortality during the dry season, but the strength of this attenuator role may vary with time and species.

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