%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.27.12.40.29
%2 sid.inpe.br/marte2/2017/10.27.12.40.30
%@isbn 978-85-17-00088-1
%F 59596
%T Identificação de crostas biológicas do solo em áreas livre de gelo na Ilha Nelson ? Antártica Marítima
%D 2017
%A Santos, Edvan Casagrande dos,
%A Figueiredo, Anderson Ribeiro de,
%A Fonseca, Eliana Lima da,
%A Simões, Jefferson Cardia,
%@electronicmailaddress edvan.casagrande@ufrgs.br
%E Gherardi, Douglas Francisco Marcolino,
%E Aragão, Luiz Eduardo Oliveira e Cruz de,
%B Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)
%C Santos
%8 28-31 maio 2017
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 2385-2391
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X The Biological Soil Crusts comprise those communities formed by the association of soil particleswith microorganisms which living over the soil surface, such as mosses, cyanobacteria, algae, fungi, lichens andbryophytes. This type of soil cover can survive at extreme conditions, for example, in arid and semi-aridenvironments, at high or negative temperatures during most of the year, at high pH and salinity levels. The soilscover a very small fraction of the Antarctic surface, but their biological, physical and chemical properties, can beused as environment indicators about temperature and humidity changes at local scale. The objective of thiswork was the identification about ice free areas with and without biological soils crusts presence using thesurface reflectance image in the near infrared region of the spectrum, acquired by ETM+/Landsat7 sensor andimage classification procedures. The study area was located at Harmony Point - Nelson Island - AntarcticMaritime. The image classification results agreed with what was observed in all 23 plots sampled during thefieldwork. This result is due to the very distinct reflectance pattern at near infrared region showed by thesnow/ice covered areas, the rocks/soils areas and the biological soil crusts areas, those are the remote sensingmost common targets at the Antarctic periglacial environment.
%9 Oceanografia e sistemas costeiros
%@language pt
%3 59596.pdf