MAPPING THE RISK OF FOREST FIRES IN THE RIO PRETO NATIONAL FOREST IN THE ATLANTIC FOREST

The Atlantic Forest biome is annually exposed to forest fires that damage thousands of hectares of forest, promote the formation of forest fragments, the destruction of biodiversity, soil compaction, runoff and silting of water bodies. Thus, the prediction and suppression of fire outbreaks are important to minimize the damage caused by fire. In this sense, this study aimed to analyze and model the risk of forest fires occurring in the Rio Preto National Forest and its buffer zone using the Fuzzy artificial intelligence technique. To do so, the land use and occupation, proximity to roads, slope and relief orientation variables were used to compose the model. Thus, the influence of each variable on burning episodes was determined with the aid of geographic information systems (GIS), as well as the spatial distribution of each of the risk classes (very low, low, moderate and high). a historical series of fires between the years 2010 and 2020 was used to perform a comparative analysis of the model. The results showed that the study area does not present worrisome risks regarding the occurrence of fires, since it is mostly covered by very low and low risk classes. Thus, it can be concluded that the application of Fuzzy modeling enables evaluating the spatial distribution of fire risk classes for the protected area areas, for which the proposed comparative analysis indicated the model’s effectiveness.

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Influence of edge and fire-induced changes on spatial distribution of small mammals in Brazilian Atlantic forest fragments

Studies on Neotropical Fauna and Environment ◽

10.1080/01650520412331333747 ◽

2005 ◽

Vol 40 (1) ◽

pp. 7-14 ◽

Cited By ~ 11

Author(s):

Alexandra S Pires ◽

Fernando AS Fernandez ◽

Daniela de Freitas ◽

Barbara R Feliciano

Keyword(s):

Spatial Distribution ◽

Atlantic Forest ◽

Small Mammals ◽

Forest Fragments ◽

Brazilian Atlantic Forest ◽

Induced Changes

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Agroforestry system as a buffer zone in a Brazilian Atlantic Forest conservation unit: an artificial nest predation perspective

Biota Neotropica ◽

10.1590/1676-0611-bn-2017-0373 ◽

2018 ◽

Vol 18 (1) ◽

Author(s):

Camila André Galvão ◽

Mercival Roberto Francisco ◽

Marcelo Nivert Schlindwein

Keyword(s):

Atlantic Forest ◽

Nest Predation ◽

Buffer Zone ◽

Agroforestry System ◽

Camera Traps ◽

Primary Forest ◽

Forest Fragments ◽

Artificial Nest ◽

Buffer Zones ◽

Predator Species

Abstract Here we inferred about the effectiveness of a buffer zone composed by an Agroforestry System (AS) for providing reproductive conditions for Atlantic Forest birds by comparing artificial nest predation rates between a buffer zone, a primary forest area, and a set of small and isolated Atlantic Forest fragments. We have used 237 nests throughout the three areas, of which 100 (42.2%) were depredated. Predation frequencies were 28.6% in the continuous forest, 100% in the AS, and 51.9% in the fragments, differing significantly. We could detect nest predators in 48 of the 100 depredated nests (48%) using camera traps. Differences between areas may be attributed to changes in nest predator species. We support previous evidences that the conservation of bird communities may not rely on buffer zones as an extension of their breeding habitats.

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Topography as a determinant of bird distribution in secondary Atlantic Forest fragments

Journal of Tropical Ecology ◽

10.1017/s0266467421000328 ◽

2021 ◽

pp. 1-7

Author(s):

Rômulo Ribon ◽

Luane Reis dos Santos ◽

Paulo De Marco ◽

Miguel Ângelo Marini

Keyword(s):

Spatial Distribution ◽

Tropical Forests ◽

Atlantic Forest ◽

Bird Species ◽

Important Variable ◽

Forest Fragments ◽

Occupancy Models ◽

Occupancy Probability ◽

Ecological Association ◽

Forest Mountain

Abstract The spatial distribution of Neotropical birds at local scales is often associated with plant successional stages and unique microhabitats such as bamboo stands and treefall gaps. Only 15% of the Atlantic Forest remains, yet this habitat is home to more than 200 endemic birds. Understanding the distribution of bird species within the Atlantic Forest can improve the test of ecological hypotheses related to habitat use and habitat selection. This study analyses the distribution of birds among different types of relief (lowlands, ravines, hillsides, and hilltops) in 41 forest fragments of different sizes (1 to 384.5 ha) within the Atlantic Forest, south east Brazil. The presence and absence data were analysed with dynamic occupancy models to determine the influence of area and topography in the distribution of bird species. Of the 169 species detected, we were able to estimate an occupancy probability of 67. Among them, relief type was an important variable for 26 species (39%). Most species showed a preference for lowlands and ravines, and some showed an association of combinations of these two reliefs with hillsides and hilltops. These preferences might be related to distribution of preferred food, nesting microhabitats, and thermoregulation. For the endemic and threatened Atlantic Forest mountain birds, the ecological association with areas of relief is a strong, and previously unsuspected, spatial distribution pattern. Our results suggest that the ecology and distribution of birds in tropical forests across hilly regions could be better understood if topography is considered. This pattern should be better investigated among other taxa in tropical forests.

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Comparative analysis of otolith shape and spatial distribution and size composition of greenland turbot Reinhardtius hippoglossoides matsuurae in the western Bering Sea

Izvestiya TINRO ◽

10.26428/1606-9919-2017-191-97-113 ◽

2017 ◽

Vol 191 ◽

pp. 97-113

Author(s):

Olga A. Maznikova ◽

Pavel K. Afanasyev ◽

Alexey M. Orlov ◽

Roman N. Novikov ◽

Pavel O. Emelin

Keyword(s):

Spatial Distribution ◽

Comparative Analysis ◽

Bering Sea ◽

Size Composition ◽

Otolith Shape ◽

Western Bering Sea ◽

Reinhardtius Hippoglossoides

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Quantitative Analysis of Forest Fires in Southeastern Australia Using SAR Data

Remote Sensing ◽

10.3390/rs13122386 ◽

2021 ◽

Vol 13 (12) ◽

pp. 2386

Author(s):

Aqil Tariq ◽

Hong Shu ◽

Qingting Li ◽

Orhan Altan ◽

Mobushir Riaz Khan ◽

...

Keyword(s):

Forest Fires ◽

Prescribed Burning ◽

Fire Risk ◽

Fire Season ◽

Prescribed Burn ◽

Backscatter Coefficient ◽

Prescribed Burns ◽

Southeastern Australia ◽

Sar Data ◽

Sar Imagery

Prescribed burning is a common strategy for minimizing forest fire risk. Fire is introduced under specific environmental conditions, with explicit duration, intensity, and rate of spread. Such conditions deviate from those encountered during the fire season. Prescribed burns mostly affect surface fuels and understory vegetation, an outcome markedly different when compared to wildfires. Data on prescribed burning are crucial for evaluating whether land management targets have been reached. This research developed a methodology to quantify the effects of prescribed burns using multi-temporal Sentinel-1 Synthetic Aperture Radar (SAR) imagery in the forests of southeastern Australia. C-band SAR datasets were specifically used to statistically explore changes in radar backscatter coefficients with the intensity of prescribed burns. Two modeling approaches based on pre- and post-fire ratios were applied for evaluating prescribed burn impacts. The effects of prescribed burns were documented with an overall accuracy of 82.3% using cross-polarized backscatter (VH) SAR data under dry conditions. The VV polarization indicated some potential to detect burned areas under wet conditions. The findings in this study indicate that the C-band SAR backscatter coefficient has the potential to evaluate the effectiveness of prescribed burns due to its sensitivity to changes in vegetation structure.

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Comparative analysis of structurally defined heparin binding sequences reveals a distinct spatial distribution of basic residues.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(19)36503-2 ◽

1993 ◽

Vol 268 (26) ◽

pp. 19228-19231

Author(s):

H Margalit ◽

N Fischer ◽

S.A. Ben-Sasson

Keyword(s):

Spatial Distribution ◽

Comparative Analysis ◽

Heparin Binding

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Buffer zone delimitation of conservation units based on map algebra and AHP technique: A study from Atlantic Forest Biome (Brazil)

Biological Conservation ◽

10.1016/j.biocon.2020.108905 ◽

2021 ◽

Vol 253 ◽

pp. 108905

Author(s):

Manoela Sacchis Lopes ◽

Bijeesh Kozhikkodan Veettil ◽

Dejanira Lüderitz Saldanha

Keyword(s):

Atlantic Forest ◽

Buffer Zone ◽

Conservation Units ◽

Map Algebra ◽

Forest Biome

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Bird Extinctions in Atlantic Forest Fragments of the Viçosa Region, Southeastern Brazil

Conservation Biology ◽

10.1111/j.1523-1739.2003.00377.x ◽

2003 ◽

Vol 17 (6) ◽

pp. 1827-1839 ◽

Cited By ~ 97

Author(s):

RÔMULO RIBON ◽

JOSÉ EDUARDO SIMON ◽

GERALDO THEODORO DE MATTOS

Keyword(s):

Atlantic Forest ◽

Southeastern Brazil ◽

Forest Fragments

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Small mammal glucocorticoid concentrations vary with forest fragment size, trap type, and mammal taxa in the Interior Atlantic Forest

Scientific Reports ◽

10.1038/s41598-021-81073-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sarah A. Boyle ◽

Noé U. de la Sancha ◽

Pastor Pérez ◽

David Kabelik

Keyword(s):

Atlantic Forest ◽

Small Mammals ◽

Acute Stress ◽

Physiological Stress ◽

Fragment Size ◽

Hair Shaft ◽

Forest Fragments ◽

Forest Fragment ◽

Trapping Methods ◽

Free Ranging

AbstractSpecies that live in degraded habitats often show signs of physiological stress. Glucocorticoid hormones (e.g., corticosterone and cortisol) are often assessed as a proxy of the extent of physiological stress an animal has experienced. Our goal was to quantify glucocorticoids in free-ranging small mammals in fragments of Interior Atlantic Forest. We extracted glucocorticoids from fur samples of 106 small mammals (rodent genera Akodon and Oligoryzomys, and marsupial genera Gracilinanus and Marmosa) from six forest fragments (2–1200 ha) in the Reserva Natural Tapytá, Caazapá Department, Paraguay. To our knowledge, this is the first publication of corticosterone and cortisol levels for three of the four sampled genera (Akodon, Oligoryzomys, and Marmosa) in this forest system. We discovered three notable results. First, as predicted, glucocorticoid levels were higher in individuals living withing small forest fragments. Second, animals captured live using restraint trapping methods (Sherman traps) had higher glucocorticoid levels than those animals captured using kill traps (Victor traps), suggesting that hair glucocorticoid measures can reflect acute stress levels in addition to long-term glucocorticoid incorporation. These acute levels are likely due to urinary steroids diffusing into the hair shaft. This finding raises a concern about the use of certain trapping techniques in association with fur hormone analysis. Finally, as expected, we also detected genus-specific differences in glucocorticoid levels, as well as cortisol/corticosterone ratios.

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