Repositório Institucional da Universidade Federal do Amapá - RIUNIFAP
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Tipo de item:Item, Influência das características de caule no escoamento pelo tronco em espécies florestais de terra firme(UNIFAP - Universidade Federal do Amapá, 2025-09-24) PINHEIRO, Lorena Pimentel; BRAMORSKI, Julieta; http://lattes.cnpq.br/9489561669191042; https://orcid.org/0000-0002-2783-5644Stemflow (ETr) is a key hydrological process for the redistribution of precipitation within forest ecosystems. This study evaluated the influence of stem morphological traits and stem moisture on ETr in tree species from a terra firme forest in Amapá, Brazil. A total of 52 individuals were monitored, considering dendrometric variables (DBH, height, basal area, and crown area), morphological traits (bark texture and stem inclination), and environmental factors (precipitation, air humidity, and stem moisture). Stem moisture was measured using a digital penetration meter, allowing the correlation between water retention and stemflow volumes. On average, ETr accounted for 0.3% of total precipitation, a seemingly low percentage, yet relevant to hydrological dynamics. Trees with smooth bark showed the highest stemflow volumes, followed by those with rough bark, while scaly-barked individuals exhibited the lowest values. Stem moisture presented significant seasonal variation, showing an inverse relationship with ETr volumes during certain periods, highlighting the influence of both internal water status and atmospheric conditions on water conduction. Additionally, crown architecture favored water channeling, whereas larger diameters and stem inclination reduced process efficiency. It is concluded that, although representing a small fraction of precipitation, ETr is strongly conditioned by moisture and morphological attributes, playing an essential role in water redistribution in tropical terra firme forests.Tipo de item:Item, Avaliação da implementação de práticas agronômicas na melhoria do crescimento e produtividade de palmeiras de açaí cultivadas em terra firme(UNIFAP - Universidade Federal do Amapá, 2023-10-11) COSTA, Lauane Monteiro; MELÉM JÚNIOR, Nagib Jorge; OLIVEIRA, Marcelo José de; http://lattes.cnpq.br/0612708881662162; https://orcid.org/0000-0002-2460-7259; http://lattes.cnpq.br/5398795908067503; https://orcid.org/0000-0002-2409-6911Tipo de item:Item, Isolamento, cultivo e taxonomia de cianobactérias de ambientes aquáticos urbanos de Macapá(UNIFAP - Universidade Federal do Amapá, 2026-02-19) LOUZADA, Laíza Maria Fortaleza; OLIVEIRA, Elane Domênica Cunha de; SILVEIRA JÚNIOR, Arialdo Martins da; http://lattes.cnpq.br/1211453646046948; https://orcid.org/0000-0003-4991-210X; http://lattes.cnpq.br/1889117131049535; https://orcid.org/0000-0002-5531-3245This study aimed to isolate and morphometrically characterize cyanobacteria species present in the main water bodies of the municipality of Macapá, in order to contribute to the understanding of regional aquatic biodiversity and its biotechnological potential. Sampling was carried out at three sites—Balneário do Curiaú, Canal do Jandiá, and Museu Sacaca—in December 2024, using a 20 μm plankton net haul, raw water collection, and measurement of environmental parameters (pH, temperature, and transparency). Isolation was performed using the micropipette isolation technique, followed by morphological characterization under both light and inverted microscopes, supported by taxonomic descriptions and identification keys. The samples were cultured in BG11, BG11-0, and an alternative medium. A total of nine strains were obtained from seven isolated or semi-isolated taxa: Coelosphaerium kuetzingianum, Microcystis panniformis, Geitlerinema splendidum, Microchaete sp., Dulcicalothrix alborzica, Cephalothrix lacustris, and Nostoc sp. The taxa were classified into four taxonomic orders: Chroococcales, Geitlerinematales, Nostocales, and Oscillatoriales. Some species, such as Dulcicalothrix alborzica, Microchaete sp., and M. panniformis, were recorded for the first time in water bodies of Amapá. The results highlight the importance of continuous studies on Amazonian cyanobacterial biodiversity, emphasizing the need for complementary molecular analyses to confirm taxonomic identification, detect new species, and assess the biotechnological and toxicological potential of the isolates. This work contributes to the expansion of the scientific knowledge base in the state of Amapá and provides relevant support for environmental monitoring and management in the region.Tipo de item:Item, A infraestrutura verde e o processo de resiliência na infraestrutura urbana de Macapá, Amapá, Brasil(UNIFAP - Universidade Federal do Amapá, 2025-04-25) RAMOS, Khallyl do Rosário; CUNHA, Helenilza Ferreira Albuquerque; http://lattes.cnpq.br/3443290397582063; https://orcid.org/0000-0001-7101-9305Tipo de item:Item, Caracterização físico-química e microbiológica da água em dois pontos de alagamento da cidade de Macapá (AP): canal do Jandiá e canal das Pedrinhas(UNIFAP - Universidade Federal do Amapá, 2023-04-24) GUEDES, Kely Cristina Pacheco; VALVERDE, Karina Cardoso; http://lattes.cnpq.br/4314270496889269; https://orcid.org/0000-0003-4518-8900