Macrófi tas aquá cas de um rio temporário no semiárido nordes no Aqua c macrophytes of a temporary river in the northeastern semi-arid region Macrófi tos acuá co un río temporal en el noreste semiáridoResumo: O papel das macrófi tas nos ecossistemas aquá cos pode ser avaliado a par r da determinação da sua biomassa, obtendo-se informações relacionadas ao tempo de crescimento, armazenamento de nutrientes, fl uxos de energia e realocação de nutrientes. Os obje vos deste estudo foram iden fi car as espécies de macrófi -tas aquá cas em duas áreas de coletas no rio Guaribas e verifi car as diferenças de biomassa das espécies encontradas para essas áreas. Foram defi nidos dois locais de amostragem ao longo do rio, na zona rural e urbana da cidade. As plantas que se encontravam dentro do quadrado foram coletadas com a mão, e as submersas com um gancho com pontas de ferro, colocadas em sacos plás cos devidamente iden fi cados e levadas ao laboratório para iden fi cação e pesagem da biomassa. Foram registradas nove espécies e Eichhornia crassipes e Salvinia auriculata apresentaram os maiores valores de peso seco, para a zona urbana e Chara cf. guairensis para a zona rural. Palavras-chave: plantas aquá cas; alocação de recursos; produ vidade; biomassa. Abstract:The role of macrophytes in aqua c ecosystems can be evaluated by determining their biomass, obtaining informa on related to growth me, nutrient storage, energy fl uxes and nutrient reloca on. This study objec ves were to iden fy the species of aqua c macrophytes in two areas of collec ons in the river Guaribas and to verify the biomass diff erences of the species found for these areas. Two sampling sites were defi ned along the river, in the rural and urban area of the city. The plants that were inside the square were collected by hand, and the submerged by a hook with iron ps and placed in plas c bags, properly iden fi ed and taken to the laboratory for iden fi ca on and weighing of the biomass. Nine species were recorded and Eichhornia crassipes and Salvinia auriculata presented the highest dry weight values for the urban zone and Chara cf. Guairensis for rural areas.
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