Resumo: Considerando o papel relevante e o nível de degradação presente nas áreas ciliares de rios urbanos, esta pesquisa objetivou estudar a composição florística do componente arbustivo-arbóreo da vegetação ciliar do rio Aquidauana (estado de Mato Grosso do Sul, Brasil), com vistas a selecionar espécies potenciais para restauração dessas áreas. A indicação considerou a origem da espécie, grupo ecológico, produção de frutos para a fauna silvestre e grau de ameaça. A coleta de dados foi realizada entre dezembro de 2014 e agosto de 2015, por meio de caminhadas aleatórias, perfazendo aproximadamente 6 km de extensão. Foram registradas 53 espécies e por levantamento bibliográfico há possibilidade de ocorrência de mais 46 espécies, totalizando 97 espécies para a região. A flora apresenta espécies típicas das margens de rios e espécies características de Cerrado, formação vegetacional adjacente à mata ciliar. As espécies registradas estão distribuídas em 38 famílias, com destaque para Fabaceae (19 espécies), Rubiaceae (6 spp.), Bignoniaceae e Malvaceae (5 spp. cada). Mais de 80% das espécies registradas apresentam algum tipo de utilidade conhecida, incluindo uso pela fauna silvestre (50%), remédio na medicina popular (32%), madeira (24%) e lenha (23%). Uma abordagem de múltiplos critérios foi empregada para selecionar espécies indicadas para restauração de trechos da mata ciliar (N = 49), com base na sua origem, grupo sucessional, utilidade, produção de frutos para a fauna e adaptação a solos úmidos e brejosos.Palavras-chave: Área de Preservação Permanente; Bacia do Rio Paraguai; restauração florestal. FLORISTIC OF THE RIPARIAN FOREST OF AQUIDAUANA RIVER (MS): SUBSIDIES FOR THE RESTORATION OF DEGRADED AREAS.Riparian areas of urban rivers are under severe degradation, despite their essential role. This research aimed to study the floristic composition of the shrub-tree component of the riparian vegetation of the Aquidauana river (Mato Grosso do Sul state, Brazil), to select potential species for restoration of these areas. The indication considered the origin of the species, ecological group, fruit production for fauna and degree of threat. Data collection was performed between December 2014 and August 2015, through random walks, approximately 6 km long. We recorded fifty-three species, and by a bibliographic survey, there is a possibility of occurrence of another 46 species, totaling 97 species Oliveira et al. | 813 Oecol. Aust. 23(4): 812-828, 2019 for the region. The flora presents typical riverbank species and characteristic Cerrado species, vegetation formation adjacent to the riparian forest. The recorded species are distributed in 38 families, with emphasis on Fabaceae (19 species), Rubiaceae (6 spp.), Bignoniaceae and Malvaceae (5 spp. each). More than 80% of recorded species have some known utility, including use by wildlife (50%), folk medicine (32%), wood (24%) and firewood (23%). A multiple-trait approach was used to select species indicated for the recovery of riparian forest sections (N = 49), based on...

With the aim of documenting aquatic macrophyte succession on floating meadows and its relationship with histosol thickness, we sampled six-hundred 0.5 9 0.5 m 2 plots of ten randomly chosen floating meadows in Baía Grande lake (Aquidauana, MS, Brazil). The floating meadows were marked in order to follow, since August 2014-August 2015, floristic and phytosociological changes and to assess their relationship with histosol thickness. We recorded 58 species belonging to 23 families and 47 genera. The richest families were Poaceae (8 species), Asteraceae (7) and Cyperaceae (6). Four species stood out for their high importance value: Oxycaryum cubense (Poepp. & Kunth) Lye, Ludwigia helminthorrhiza (Mart.) H. Hara, Eichhornia azurea (Sw.) Kunth and Vigna longifolia (Benth.) Verdc. Histosol thickness of the floating meadows varied from 1 to 51 cm, making it possible to classify them into three classes. We observed that most species (63.3%) were in the initial and intermediate stages of succession (1-34 cm histosol) and that species were replaced as a function of histosol thickness. We conclude that floating meadows have succession stages with various species of aquatic macrophytes related with histosol thickness, but species composition regarding succession stages differs from other water bodies in the Pantanal wetland.

The objective of this study was to characterize the floristic and phytosociological composition of aquatic macrophytes occurring on the nearshore and on floating meadows of a large oxbow lake in the Pantanal wetland, in order to identify the degree of similarity between these biological compartments. Therefore, we sampled 100 plots of 0.5 x 0.5 m on floating meadows and 100 nearshore. We recorded 42 species, being 30 nearshore and 38 on floating meadows. The richness observed on floating meadows was little superior to the recorded nearshore, and the similarity between the compartments was relatively high (Jaccard = 61.90). Four species occurred exclusively nearshore, while 12 species were restricted to floating meadows. The outstanding species for their frequency and a high percentage of cover nearshore were Ludwigia helminthorrhiza (Mart.) H.Hara and Eichhornia azurea (Sw.) Kunth. On floating meadows, Cyperus blepharoleptos Steud. presented the highest importance value (61.3). The emergent and amphibious life forms were the most common in both compartments. The similarity between both formations is an expected outcome, once the floating meadows can develop from nearshore plants and contact them during displacements within the lake. We highlight the high number of exclusive species recorded on floating meadows, which can be explained by environmental (related to the interaction between species and environmental characteristics) or spatial factors (dispersal capacity) that favor the colonization of the floating meadows by species absent nearshore.

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