Importance of Remote Sensing for the Study of Spatial Dynamics of Estuarine Neuston from Southern Chile

2020 ◽  
Author(s):  
Juan Canete ◽  
Carlos Cardenas ◽  
Maximo Frangopulos ◽  
Ximena Aguilar ◽  
Javier Diaz-Ochoa
Keyword(s):  
Remote Sensing ◽  
Spatial Dynamics ◽  
Southern Chile

scholarly journals IMPORTANCE OF REMOTE SENSING FOR THE STUDY OF SPATIAL DYNAMICS OF ESTUARINE NEUSTON FROM SOUTHERN CHILE

2020 ◽  
Vol XLII-3/W12-2020 ◽  
pp. 385-388
Author(s):  
J. I. Cañete ◽  
C. Cárdenas ◽  
M. Frangópulos ◽  
X. Aguilar ◽  
J. Díaz-Ochoa
Keyword(s):  
Remote Sensing ◽  
Chlorophyll A ◽  
Spatial Dynamics ◽  
Remote Sensing Data ◽  
Preliminary Evidence ◽  
Southern Chile ◽  
High Concentration ◽  
Chl A ◽  
Magellan Strait ◽  
Meso Scale

Abstract. Zooplankton aggregation, hydrographic and remote sensing data were employed to relate the spatial dynamics of neustonic communities with chlorophyll a (Chl a) and suspended organic matter (SOM) at a spatial mesoscale (10 to 1000 km) in the southern Chilean fjords system along Magellan Strait, Chile (CIMAR 16: October/November 2010 and CIMAR 25; September/October 2019) in order to identify oceanographic process producing aggregation of neuston. Preliminary evidence of CIMAR 25 shows significant concentrations of Chl a and SOM around Dawson Island (DI), Magellan Strait. During CIMAR 16 important aggregation of specific neustonic taxa (copepodites of Microsetella rosea, larvae of the polychaete Polygordius sp and cyphonautes of the bryozoan Membranipora isabelleana) was observed around DI, Magellan Strait. Satelital images in the area of CIMAR 16 provide evidence of important aggregation of chlorophyll a/SOM around DI. CIMAR Cimar 25 showed that the Chl a and SOM aggregation around DI is recurrent and could to explain the high concentration of neuston around this island to spite of mesotrophic conditions. Remote sensing in this study area provides a tool to understanding oceanographic and topographic factors that potentially regulate the abundance and spatial distribution of surface zooplankton to spatial meso-scale along Magellan Strait.

scholarly journals Mapeamento dos Sistemas Ambientais do Município de Caucaia (CE) utilizando Sistema de Informação Geográfica (SIG): Subsídios para o Planejamento Territorial (Mapping of the Environmental Systems of the Municipality of Caucaia (CE) using Geographic...)

2015 ◽  
Vol 8 (1) ◽  
pp. 025
Author(s):  
Cleyber Nascimento de Medeiros ◽  
Marcos José Nogueira De Souza
Keyword(s):  
Remote Sensing ◽  
Population Density ◽  
Spatial Dynamics ◽  
Human Pressure ◽  
Organizational Conditions ◽  
Territorial Planning ◽  
Environmental Systems ◽  
De Se ◽  
High Population Growth ◽  
The City

Este trabalho objetivou analisar aspectos geoambientais de Caucaia, localizado no Estado do Ceará. O município vem apresentado nos últimos anos um elevado crescimento populacional, suscitando uma forte pressão sobre os recursos naturais, justificando assim a necessidade de se identificar as áreas mais e menos vulneráveis ambientalmente ao adensamento populacional, gerando com isto elementos para o planejamento territorial. Desse modo, procedeu-se a caracterização geoambiental criando os mapas de sistemas ambientais e de vulnerabilidade ambiental. Constatou-se que 21% do território têm alta vulnerabilidade à ocupação, sendo de 58% e 17%, respectivamente, os percentuais para os locais com média e baixa vulnerabilidade. Menciona-se que o planejamento territorial com base na compartimentação geoambiental surge como um importante delineador das condições organizacionais e da funcionalidade dos ambientes, tendo em vista que considera sempre suas características ambientais e sua dinâmica sócio-espacial de maneira integralizada.   A B S T R A C T   This study aimed to analyze geoenvironmental aspects of the city of Caucaia, located in the state of Ceará, Brazil. The municipality has presented in recent years a high population growth, raising a strong human pressure on natural resources, thus justifying the need to identify the most and least environmentally vulnerable areas to population density, generating elements for territorial planning. Thus, we proceeded to environmental characterization creating maps of environmental systems and environmental vulnerability Caucaia, scale 1:50,000, using, for both, the geosystemic theory and the use of remote sensing products, cartographic data and fieldwork. It was verified that 21% of the territory have high vulnerability to occupation, being 58% and 17%, respectively, the percentages for areas with medium and low vulnerability. It is mentioned that the territorial planning based on geoenvironmental compartmentation emerges as important eyeliner of the organizational conditions and functionality of environments, considering their environmental characteristics and socio-spatial dynamics in the integrated form. Keywords: Mapping of environmental systems, Territorial planning, Caucaia.  

scholarly journals Spatial dynamics of <I>Fabiana imbricata</I> shrublands in northwestern Patagonia in relation to natural fires

2010 ◽  
Vol 10 (5) ◽  
pp. 957-966 ◽  
Author(s):  
F. J. Oddi ◽  
N. Dudinszky ◽  
L. Ghermandi
Keyword(s):  
Remote Sensing ◽  
Spatial Configuration ◽  
Spatial Dynamics ◽  
Digital Processing ◽  
Mediterranean Ecosystems ◽  
Fire Effects ◽  
Landscape Scale ◽  
Growth Rings ◽  
Natural Fires ◽  
Species Dynamics

Abstract. Fire is a critical disturbance in the structuring and functioning of most Mediterranean ecosystems. In northwestern Patagonia, vegetation patterns are strongly influenced by fire and environmental heterogeneity. Dendroecology, together with satellite imagery and GIS, have been demonstrated to be useful tools in studies that relate to fire effects with patches, patterns and species dynamics at landscape scale. Such studies can be approached from landscape ecology, which has evolved in the last years supported by the development of remote sensing and GIS technologies. This study evaluates the spatial dynamic of F. imbricata in response to fire using remote sensing, GIS and dendrochronology techniques, at landscape scale. Two sites were evaluated and one of them was affected by fire in the year 1999. The digital processing images (using the NBR spectral index) and the dendroecological analysis verified this. A fire, occurring in 1978, was also detected by the analysis of F. imbricata growth rings. The relation between F. imbricata shrubland dynamics and spatial configuration with fire, land topography and hydrography was established in the study area.

scholarly journals DINÂMICA ESPACIAL DE USO E OCUPAÇÃO DO SOLO URBANO NO MUNICÍPIO DE BREU BRANCO-PA

2021 ◽  
Vol 14 (22) ◽  
pp. 101
Author(s):  
Wagner Luiz Gonçalves da SILVA (IFPA) ◽  
Gilberto de Miranda ROCHA (UFPA)
Keyword(s):  
Remote Sensing ◽  
Spatial Dynamics ◽  
Strong Relationship ◽  
Point Of View ◽  
Master Plan ◽  
Northeast Region ◽  
Spatial Growth ◽  
The North ◽  
Environmental Protection Policies ◽  
The City

Breu Branco é um município do estado do Pará, localizado na microrregião do lago de Tucuruí. Ao longo dos anos o município experimentou um crescimento populacional acelerado, consequência da migração de pessoas oriundas de outras regiões em busca de trabalho e moradia próximos às obras de barragem. O crescimento espacial tem forte relação com a Hidroelétrica. Além do fator populacional, outros três fatores foram importantes para o crescimento espacial de Breu Branco: o preço da terra, a topografia da área de expansão e a falta de políticas de proteção ambiental no município. Nesse trabalho utilizamos ferramentas cartográficas e sensoriamento remoto para a construção de mapas em três períodos 1996, 2006 e 2016. Os resultados obtidos mostram novas dinâmicas espaciais, como a duplicação da área urbana, saturação do núcleo projetado da cidade em direção ao norte, conversão de áreas de floresta e preservação (APP) em ocupações, concentração imobiliária e especulação sobre novas áreas, do ponto de vista populacional um aumento de 58% da população em vinte anos.Palavras-chave: Hidroelétrica. Território, Dinâmicas de uso e ocupação do solo. Cartografia. Plano diretor.SPATIAL DYNAMICS OF USE AND OCCUPATION OF URBAN SOIL IN THE MUNICIPALITY OF BREU BRANCO-PAAbstract: Breu Branco is a municipality in the state of Pará, located in the microregion of Lake Tucuruí. Over the years, the municipality experienced an accelerated population growth, a consequence of the migration of people from other municipalities of Pará and the northeast region of Brazil in search of work and housing near the works. The spatial growth has a strong relationship with the implementation phases of the Tucuruí HPP. In addition to the population factor, three other factors were important for the Breu Branco spatial growth: the price of land, the topography of the expansion area and the lack of environmental protection policies the municipality. In this work, we used cartographic tools and remote sensing for the construction of maps in three periods 1996, 2006 and 2016. The results obtained show new spatial dynamics, such as the duplication of the urban area, saturation of the projected nucleus of the city towards the north, conversion of forest and preservation areas (APP) into occupations, real estate concentration and speculation about new areas, from the point of view. population view an increase of 58% of the population in twenty years. Keywords: Hydroelectric.Territory. Dynamics of use and Soil occupation. Cartography. Master Plan. 

scholarly journals Forestry development, water scarcity, and the Mapuche protest for environmental justice in Chile

2016 ◽  
Vol 19 (1) ◽  
pp. 121-144 ◽  
Author(s):  
ROBINSON TORRES-SALINAS ◽  
GERARDO AZÓCAR GARCÍA ◽  
NOELIA CARRASCO HENRÍQUEZ ◽  
MAURICIO ZAMBRANO-BIGIARINI ◽  
TATIANA COSTA ◽  
...  
Keyword(s):  
Environmental Justice ◽  
Political Ecology ◽  
Environmental Degradation ◽  
Theoretical Approach ◽  
Natural Water ◽  
Water Scarcity ◽  
Spatial Dynamics ◽  
Native Forest ◽  
Southern Chile ◽  
Forestry Plantations

Abstract From a theoretical approach based on political ecology and environmental justice, we assess how forestry development has generated socio-spatial dynamics of environmental degradation and water scarcity in southern Chile. Through historical-geographical and ethnographic methods, we discuss how and why the spread of forestry plantations has significantly influenced social and environmental degradation of the Mapuche's modes of living. In response, during recent decades a political articulation of a Mapuche social movement is observed. Their demands include land, autonomy, rights and opportunities to frame their own development strategies. Within the internal diversity of this movement, a key principle is reversing the spread of environmental degradation by recovering the native forest and its natural water cycles, which have been disrupted significantly by the increasing of forestry plantations. We explore these dynamics of the Mapuche movement from an environmental justice approach.

scholarly journals Remote Sensing of Urban Forests

2019 ◽  
Vol 11 (20) ◽  
pp. 2383 ◽  
Author(s):  
Giovanni Sanesi ◽  
Vincenzo Giannico ◽  
Mario Elia ◽  
Raffaele Lafortezza
Keyword(s):  
Remote Sensing ◽  
Urban Areas ◽  
Spatial Dynamics ◽  
Urban Forests ◽  
Urban Environments ◽  
Special Issue ◽  
Wide Range ◽  
Temporal And Spatial ◽  
New Sensors

Urban forests and green infrastructures at large are of critical importance for contemporary cities as they provide a wide range of ecosystem services (ESS) that enhance the quality of life of urban dwellers. Remote sensing technologies have greatly contributed to assessing and mapping the spatial distribution of ESS in urban areas, although more research is needed given the availability of new sensors from multiple satellites and platforms and the particular characteristics of urban environments (e.g., high heterogeneity). This Special Issue hosts papers focusing on the temporal and spatial dynamics of urban forests with special attention given to the most recent remote sensing technologies as well as advanced methods for processing geospatial data and extracting meaningful information.

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