Contributions of the complexity paradigm to the understanding of Cerrado's organization and dynamics

Mattos, Sérgio Henrique Vannucchi Leme de; Vicente, L. E.; Filho, Archimedes Pérez; Piqueira, José Roberto Castilho

doi:10.1590/0001-3765201620150747

Cited by 5 publications

(4 citation statements)

References 17 publications

(11 reference statements)

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“…Throughout Brazil’s history, especially in the last five decades, the Cerrado has suffered considerable changes, owing to anthropic actions that have provoked a significant reduction in its original coverage area and to the intense fragmentation of remnants of this vegetation [ 36 ]. Thus, as highlighted by Mattos et al [ 37 ], the organisation and dynamics of the Cerrado characterise it as a complex environmental system whose phytophysiognomies alternate in time and space, owing to natural and anthropic factors and processes.…”

Section: Introductionmentioning

confidence: 99%

Metrics based on information entropy applied to evaluate complexity of landscape patterns

et al. 2022

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Landscape is an ecological category represented by a complex system formed by interactions between society and nature. Spatial patterns of different land uses present in a landscape reveal past and present processes responsible for its dynamics and organisation. Measuring the complexity of these patterns (in the sense of their spatial heterogeneity) allows us to evaluate the integrity and resilience of these complex environmental systems. Here, we show how landscape metrics based on information entropy can be applied to evaluate the complexity (in the sense of spatial heterogeneity) of patches patterns, as well as their transition zones, present in a Cerrado conservation area and its surroundings, located in south-eastern Brazil. The analysis in this study aimed to elucidate how changes in land use and the consequent fragmentation affect the complexity of the landscape. The scripts CompPlex HeROI and CompPlex Janus were created to allow calculation of information entropy (He), variability (He/Hmax), and López-Ruiz, Mancini, and Calbet (LMC) and Shiner, Davison, and Landsberg (SDL) measures. CompPlex HeROI enabled the calculation of these measures for different regions of interest (ROIs) selected in a satellite image of the study area, followed by comparison of the complexity of their patterns, in addition to enabling the generation of complexity signatures for each ROI. CompPlex Janus made it possible to spatialise the results for these four measures in landscape complexity maps. As expected, both for the complexity patterns evaluated by CompPlex HeROI and the complexity maps generated by CompPlex Janus, the areas with vegetation located in a region of intermediate spatial heterogeneity had lower values for the He and He/Hmax measures and higher values for the LMC and SDL measurements. So, these landscape metrics were able to capture the behaviour of the patterns of different types of land use present in the study area, bringing together uses linked to vegetation with increased canopy coverage and differentiating them from urban areas and transition areas that mix different uses. Thus, the algorithms implemented in these scripts were demonstrated to be robust and capable of measuring the variability in information levels from the landscape, not only in terms of spatial datasets but also spectrally. The automation of measurement calculations, owing to informational entropy provided by these scripts, allows a quick assessment of the complexity of patterns present in a landscape, and thus, generates indicators of landscape integrity and resilience.

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Section: Introductionmentioning

confidence: 99%

Metrics based on information entropy applied to evaluate complexity of landscape patterns

et al. 2022

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“…Since the early 2000s, the idea of adapting LMC and SDL to dynamical systems was successfully applied to different types of time evolution problems: bird songs [13], neural plasticity [14], interactions between species in ecological systems [2], physiognomies of landscapes [15], economic series [16], spread depression [17], and quantum information [18].…”

Section: Introductionmentioning

confidence: 99%

LMC and SDL Complexity Measures: A Tool to Explore Time Series

Piqueira

Mattos

2019

Complexity

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This work is a generalization of the López-Ruiz, Mancini, and Calbet (LMC) and Shiner, Davison, and Landsberg (SDL) complexity measures, considering that the state of a system or process is represented by a continuous temporal series of a dynamical variable. As the two complexity measures are based on the calculation of informational entropy, an equivalent information source is defined by using partitions of the dynamical variable range. During the time intervals, the information associated with the measured dynamical variable is the seed to calculate instantaneous LMC and SDL measures. To show how the methodology works generating indicators, two examples, one concerning meteorological data and the other concerning economic data, are presented and discussed.

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“…In Cerrado biome, its habitat is threatened, with an estimated reduction of 10% in the next fifteen years, affecting strongly the population of this specie, being relevant the fact that 30% of specimens are killed by accidental death in roadsides, confrontation with domestic dogs, natural mortality of pups/juveniles, although it is not characterized in extinction, yet vulnerable. In this context, understand its biological system and components this animal habitat, is essential for its conservation [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Mastication Muscles in Hoary Fox (Lycalopex vetulus - LUND, 1842): Descriptive and Comparative Study

Santee¹,

Oliveira²,

Oliveira³

et al. 2019

IJAERS

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Mastication muscles are responsible for lowering and elevation of mandible, which four of them are responsible for mandible elevation in Hoary Fox: Masseter, Temporal, Medial Pterygoid and Lateral Pterygoid; and one for lowering: Digastric. Considering anatomical study of these muscles, the present work aimed to describe, analyze and compare the anatomy of Hoary Fox mastication muscles with data described in lite rature. In this sense, for this work development, two specimens of Hoary fox ( Lycalopex vetulus) were used, being fixed in aqueous solution of 10% formaldehyde for conservation, with later description of characteristics, location, size, origin and insertion of muscles. Thus, was observed that Masseter muscle of Hoary Fox is relatively smaller than other species, such as Capuchin Monkey. A slight protuberance was also observed on lateral surface of the face, covering Ramus and Angle of mandible. When analyzed, Medial Pterygoid Muscle is a robust muscle and originates from Palatine and Pterygoid bones, directing dorsocaudally for insertion into medial face of the angle of mandible and adjacent areas, a location that is confused with Masseter (superficial part) insertion. Lateral pterygoid muscle is considerably smaller than medial and extends from sphenoid bone to mandible branch. Temporal muscle is the largest muscle of Hoary Fox head, composed of four parts: Dorsal, Medial, Ventral and Rostral; this muscle has its surface face covered by a thick fascia, the Temporal Aponeurosis.

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Contributions of the complexity paradigm to the understanding of Cerrado's organization and dynamics

Cited by 5 publications

References 17 publications

Metrics based on information entropy applied to evaluate complexity of landscape patterns

Metrics based on information entropy applied to evaluate complexity of landscape patterns

LMC and SDL Complexity Measures: A Tool to Explore Time Series

Mastication Muscles in Hoary Fox (Lycalopex vetulus - LUND, 1842): Descriptive and Comparative Study

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