Canonical Correspondence Analysis Cca
Mostrando 25-36 de 39 artigos, teses e dissertações.
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25. Macroinvertebrados bentônicos como indicadores de qualidade ambiental de afluentes do Rio Uberabinha, Uberlândia - MG / Benthic macroinvertebrates as environmental quality indicators of Uberabinha river tributaries, Uberlândia - MG
The use of biotic indices and different metrics of benthic macroinvertebrates has been widely used in studies on lotic systems in the context of environmental assessment, as well as the knowledge of the biotic and abiotic relationship and longitudinal dynamics of physico-chemical variables of these aquatic environments. This study aimed to evaluate the water
Publicado em: 2008
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26. PHYTOSOCIOLOGY OF THE ARBOREAL COMMUNITIES IN SAVANNAS FROM CENTRAL BRAZIL / FITOSSOCIOLOGIA DE COMUNIDADES ARBÓREAS EM SAVANAS DO BRASIL CENTRAL
Estes estudos foram desenvolvidos no estado de Mato Grosso, Brasil, na região de Chapada dos Guimarães e Baixada Cuiabana, que compreendem, respectivamente, um alto platô e uma grande planície baixa, restringindo-se a duas áreas cobertas por vegetação com fisionomia savânica do tipo Cerrado stricto sensu. Partindo-se da hipótese de que o conheciment
Publicado em: 2008
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27. Comunidades zooplanctônicas como bioindicadoras da qualidade da água de quatro reservatórios da região semi-árida do Rio Grande do Norte
The response of zooplankton assemblages to variations in the water quality of four man-made lakes, caused by eutrophication and siltation, was investigated by means of canonical correspondence analysis. Monte Carlo simulations using the CCA eingenvalues as test statistics revealed that changes in zooplankton species composition along the environmental gradie
Publicado em: 2007
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28. Esponjas (Porifera, Demospongiae) indicadoras ambientais na APA Meandros do Rio Araguaia, Brasil.
A first survey for freshwater sponges was carried out at the protected Amazonian area of Meandros do Rio Araguaia, at the Brazilian states of Tocantins, Mato Grosso and Goiás. The survey aimed to sample the largest number of different freshwater habitats from this Amazonian clear waters area. It was carried out at different GPS registered sampling stations,
Publicado em: 2007
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29. Floristic, phytossociology and edaphic caracters of two deciduous dry forests within Triângulo Mineiro region / Florística, fitossociologia e caracteres edáficos de duas florestas estacionais deciduais no Triângulo Mineiro
Deciduous dry forests are characterized by both seasonal climate and great leaf fall of the arboreus elements. They are distributed throughout tropical regions and within Triângulo Mineiro region they can be found in uphill turned around rivers. Currently, those forests are in a critical conservation status. Deciduous dry forests are the most threatened of
Publicado em: 2007
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30. FlorÃstica, fitossociologia e caracteres edÃficos de duas florestas estacionais deciduais no TriÃngulo Mineiro / Floristic, phytossociology and edaphic caracters of two deciduous dry forests within TriÃngulo Mineiro region
Deciduous dry forests are characterized by both seasonal climate and great leaf fall of the arboreus elements. They are distributed throughout tropical regions and within TriÃngulo Mineiro region they can be found in uphill turned around rivers. Currently, those forests are in a critical conservation status. Deciduous dry forests are the most threatened of
Publicado em: 2007
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31. VariÃveis ambientais e a distribuiÃÃo de espÃcies arbÃreas em uma floresta estacional decidual no TriÃngulo Mineiro / Environmental variables and distribution of trees in a dry deciduous forest of a TriÃngulo Mineiro
The objective of the present study was to characterize the phytossociological structure of trees in a dry deciduous forest and to correlate the distribution of the most abundant species in the forest with environmental factors (soil and topography). For the phytossociological survey fifty 10m x 20m plots were laid out, totaling 1 ha, where all the trees with
Publicado em: 2005
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32. CLASSIFICATION AND GROWTH OF ECOLOGICAL GROUPS FROM MIXED RAINY FOREST OF ARAUCARIA IN SÃO FRANCISCO DE PAULA, RS. / CLASSIFICAÇÃO E CRESCIMENTO DE GRUPOS ECOLÓGICOS DA FLORESTA OMBRÓFILA MISTA NA FLONA DE SÃO FRANCISCO DE PAULA, RS.
O presente trabalho foi realizado em uma Floresta Ombrófila Mista no Estado do Rio Grande do Sul, Brasil, que consiste num dos mais ricos tipos florestais que o Estado apresenta. Dada a importância da conservação e uso apropriado de florestas naturais e a deficiência de estudos específicos de fatores que influenciam no crescimento em Floresta Ombrófil
Publicado em: 2005
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33. Diagnostic of game birds and mammals populations of Serra do Mar State Park, SP, Brazil. / Diagnóstico das populações de aves e mamíferos cinegéticos do Parque Estadual da Serra do Mar, SP, Brasil.
The aim of this work was to estimate the abundance, diversity and population size of game birds and mammals from the rain forest at Serra do Mar State Park (Parque Estadual da Serra do Mar - PESM), and to identify the variables which influence the ocurrence and distribution of those species. The PESM has 3.150 km2 and is the major continuous remaining of Atl
Publicado em: 2004
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34. Florística, fitossociologia e dinâmica de duas florestas secundárias antigas com histórias de uso diferentes no nordeste do Pará-Brasil. / Floristic, phitosociology and dinamic of two old secondary forests with different history of use in the northeastern Pará-Brazil.
The increase of the substitution from process amazonic forest by agricultural areas and their desertation afterwards have caused an increasing number of secondary forest fragments to happen. Aiming to contributing with the understanding of the diynamics of these areas, the floristic composition, the phitosociology, the ingrowth rate, the mortality rate, the
Publicado em: 2004
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35. Floristic composition and horizontal structure of a Montane Semideciduous Seasonal Forest Juquinha de Paulas Forest, Viçosa, MG / Florística e estrutura horizontal de uma Floresta Estacional Semidecidual Montana Mata do Juquinha de Paula, Viçosa, MG
This research aimed characterise the floristic composition and tree community structure throughout a toposequence in a Semideciduous Seasonal Forest patch in the municipality of Viçosa, Minas Gerais State, Brazil (2045S and 4255W). The climate in the region is Cwb by Köppen system. Sampling was carried out by the plot method, where five groups of four cont
Publicado em: 2002
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36. A ESTRUTURA DO SUB-BOSQUE DE POVOAMENTOS HOMOGÊNEOS DE Mimosa scabrella Bentham, EM ÁREA MINERADA, EM POÇOS DE CALDAS, MG
RESUMO Foi realizado um inventário florístico-estrutural da regeneração natural de espécies arbustivoarbóreas do sub-bosque de um plantio homogêneo de Mimosa scabrella Bentham implantado, visando à reabilitação de área minerada, em Poços de Caldas. Foram utilizadas dezenove parcelas de 50 m2 (5 m × 10 m) e amostrados os indivíduos arbustivo-arb
Ciênc. Florest.. Publicado em: 2000-12