scholarly journals The aquatic macrophyte flora of the Pandeiros River Wildlife Sanctuary, Minas Gerais, Brazil

Check List ◽  
2013 ◽  
Vol 9 (2) ◽  
pp. 415 ◽  
Author(s):  
Marco Otávio Dias Pivari ◽  
Pedro Lage Viana ◽  
Felipe Sá Fortes Leite
Keyword(s):  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Life Forms ◽  
Aquatic Environments ◽  
Oxbow Lakes ◽  
Wildlife Sanctuary ◽  
Hydrographic Basin ◽  
Left Margin ◽  
High Diversity ◽  
Conservation Of Biodiversity

The São Francisco River forms one of the main Brazilian hydrographic basins of ca. 645,000 km2. The Pandeiros River is a tributary situated on the left margin of the São Francisco and is considered a strategic component for conservation of biodiversity of that hydrographic basin. An inventory of the aquatic macrophyte flora of the Pandeiros River Wildlife Sanctuary was carried out, using collections of botanical samples and examination of specimens at the BHCB Herbarium. Aquatic environments in the study area were classified as follows: the Pandeiros riverbed, floodplains, oxbow lakes, and swamps. A total of 101 species was inventoried, distributed in 37 families (1 charophytes, 1 liverworts, 3 ferns and 32 angiosperms) and 71 genera. The species were classified into seven life forms, with the amphibian and rafted plants the more representative. The area shows a high diversity in its aquatic macrophytes and has an important role in the conservation of biodiversity of the region.

scholarly journals Temporal and spatial patterns of aquatic macrophyte diversity in the Upper Paraná River floodplain

2009 ◽  
Vol 69 (2 suppl) ◽  
pp. 617-625 ◽  
Author(s):  
SM. Thomaz ◽  
P. Carvalho ◽  
AA. Padial ◽  
JT. Kobayashi
Keyword(s):  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Diversity Index ◽  
Species Turnover ◽  
Time Frame ◽  
Life Forms ◽  
Paraná River ◽  
River Floodplain ◽  
Parana River ◽  
Paraná River Floodplain

Although the importance of long-term data has been emphasized by ecologists in recent years, little is known about how communities may change over time. In this study, we describe the general patterns of aquatic macrophyte diversity in the Paraná River floodplain observed during six years of study. Temporal changes in community composition were also evaluated. Data on the presence or absence of aquatic macrophytes were collected between March 2002 and March 2008, in six lakes associated with three rivers. Different analytical strategies were used to evaluate the dynamics of aquatic macrophyte communities between the different systems in the floodplain. The composition of aquatic macrophytes differed among the rivers, mainly with respect to the different vegetation life forms (floating, submersed, emergent and rooted with floating stems). The temporal similarity of species composition during the six years and the beta-diversity index indicated that the month-to-month species turnover was, in general, lower in the connected lakes, which are directly influenced by the river. Probably the water level fluctuation is a selective force that contributes to maintaining diversity or richness. Our findings indicated the importance of abiotic characteristics and connectivity of the lakes in determining macrophyte composition and community stability over a long time frame.

scholarly journals MACRÓFITAS AQUÁTICAS DA COLEÇÃO DO HERBÁRIO DO MARANHÃO (MAR) = AQUATIC MACROPHYTES OF THE COLLECTION OF HERBARIUM OF MARANHÃO (MAR)

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Marlla Maria Barbosa Arouche ◽  
Luann Brendo da Silva Costa ◽  
Thauana Oliveira Rabelo ◽  
Regis Catarino da Hora ◽  
Arnildo Pott ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Aquatic Macrophytes ◽  
Basic Research ◽  
Life Forms ◽  
Sampling Effort ◽  
Water Network ◽  
Collection Site ◽  
Macrophyte Species ◽  
Floating Plants ◽  
Conservation Of Biodiversity

Os estudos de macrófitas aquáticas têm contribuído para compreensão estrutural e funcional deste grupo de plantas nos ambientes em questão. Mesmo com a importância dessas pesquisas para a conservação da biodiversidade e dos recursos hídricos, os estudos básicos sobre macrófitas ainda são insuficientes diante da dimensão e do grande número de ecossistemas aquáticos no Brasil. Quando falamos do Maranhão esses estudos são ainda mais escassos tendo em vista que a nossa rede hídrica é composta por 12 bacias hidrográficas que corresponde a aproximadamente 60% do território do Estado. Com intuito de atender essa demanda e conhecer a diversidade de espécies e suas distribuições nos ecossistemas maranhenses, foi feito um levantamento das macrófitas aquáticas registradas no acervo do Herbário Maranhão (MAR), complementado com os dados do SpeciesLink. A lista gerada segue a proposta de classificação do APG IV (2016) incluindo informações como: voucher, local de coleta e formas de vida. Foi listado um total de 40 espécies, distribuídas em 28 gêneros e 18 famílias. As famílias mais numerosas foram Cyperaceae e Onagraceae (5 espécies cada), Araceae e Pontederiaceae (4 spp.) e Alismataceae, Lentibulariaceae e Poaceae (3 spp.). Em relação às formas biológicas, 35% são plantas emergentes, 25% anfíbias; 20% flutuantes livres e 20% flutuantes fixas. O material foi registrado em 19 municípios do Estado e entre as primeiras coletas e outros registros houve um hiato de coleta por 20 anos, o que reforça a falta de dados para a área e a necessidade de maior esforço amostral para o Estado do Maranhão.ABSTRACTStudies of aquatic macrophytes have contributed to the conservation of biodiversity and water resources. However, basic research on macrophytes are still insufficient given the size and large number of aquatic ecosystems in Brazil. Regarding Maranhão, such studies are even scarcer in view of our water network composed of 12 hydrographic basins that correspond to approximately 60% of the territory of Maranhão State. Thus, the objective of the study was to know the diversity and distribution of macrophyte species in the ecosystems of Maranhão registered at the Herbarium in Maranhão (MAR). For this, surveys were carried out in the collection of Herbarium MAR complemented with data from the SpeciesLink databank, and included information such as voucher, collection site and life forms. The survey included 40 species were listed, distributed into 28 genera and 18 families. The most numerous families were Cyperaceae and Onagraceae (5 species, each),Araceae and Pontederiaceae (4 species, each), and Alismataceae, Lentibulariaceae and Poaceae (3 species, each). Regarding biological forms, 35% are emergent, 25% amphibious; 20% free floatingand 20% rooted floating plants. The material was registered in 19 municipalities of the Maranhão State. Among the first collections and recent records there was a collection gap for 20 years, that highlights the need for more sampling effort for Maranhão state. 

scholarly journals Aquatic Macrophytes in Southern Amazonia, Brazil: Richness, Endemism, and Comparative Floristics

2021 ◽  
Author(s):  
Milton Omar Cordova Neyra ◽  
Josiane Fernandes Keffer ◽  
Dienefe Rafaela Giacoppini ◽  
Vali Joana Pott ◽  
Arnildo Pott ◽  
...  
Keyword(s):  
Aquatic Macrophytes ◽  
New Records ◽  
Aquatic Macrophyte ◽  
Taxonomic Diversity ◽  
Life Forms ◽  
Species List ◽  
Macrophyte Species ◽  
Northern Regions ◽  
Northern Brazil ◽  
Southern Amazonia

Abstract Southern Amazonia potentially harbors a wide diversity of aquatic macrophyte species because of its diverse wetland habitats and location in the Amazon-Cerrado transition zone, the two largest biogeographic domains in South America. We inventoried the taxonomic diversity of aquatic macrophytes in the region, including endemism, habitats, species life forms, and floristic comparisons with other Brazilian regions. We found a high number of species of aquatic macrophytes for the southern Amazon region, comparable to extensive inventories in larger areas in southern, northeastern, and northern regions of Brazil. We recorded 688 species of aquatic macrophytes in 299 genera and 95 families, of which 66 species are new records, 89 endemic, and 5 exclusive to Brazilian Amazonia. We present new records of aquatic macrophyte species, together with their degree of endemism and occurrence restricted to the region. The macrophyte species list of southern Amazonia showed 60% similarity to inventories in the Xingu basin and in northern Brazil. This high diversity of aquatic macrophytes in the Southern Amazonia, with endemic species and others with restricted ranges, emphasizes the importance of conserving wetlands and vegetation types where they grow in the region.

scholarly journals Role of macrophyte life forms in driving periphytic microalgal assemblages in a Brazilian reservoir

2015 ◽  
Author(s):  
Ubirajara L. Fernandes ◽  
Elaine C.C. De Oliveira ◽  
Sírleis R. Lacerda
Keyword(s):  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Sampling Site ◽  
Morphological Characteristics ◽  
Aquatic Organisms ◽  
Life Forms ◽  
Frequency Diversity ◽  
Floating Macrophyte ◽  
High Species Richness

Macrophytes play several roles in aquatic ecosystems, including the provision of habitat for many aquatic organisms, especially the periphyton. The aims of this study were to characterize the structure of periphytic microalgal assemblages on different aquatic macrophyte life forms in order to establish similarities between assemblages from nearby sampling sites. We hypothesized that i) aquatic macrophytes with different life forms and morphological characteristics could differently influence the structure of the periphyton and that ii) the greatest similarity in periphyton composition should be observed among macrophytes that occupy the same sampling site. The study was conducted from 2006 to 2008 in the Thomaz Osterne de Alencar reservoir (Crato City, Ceará State, Brazil) and involved the taxonomic surveying of microalgae attached to five different macrophytes with the application of structural descriptors (richness, abundance, frequency, diversity and equitability). A total of 127 taxa, of which 44% belonged to the Chlorophyta, were identified. The microalgae assemblages showed high species richness on <em>Salvinia auriculata </em>Aubl., a free-floating macrophyte, and large abundance on <em>Apalanthe granatensis</em> (Humb. &amp; Bonpl.) Planch., a submerged anchored macrophyte. ANOVA indicated that periphyton significantly varied among the macrophytes investigated, and nearby sampling sites showed no structural similarities in microalgal assemblages. In general, we can conclude that the structure of periphyton assemblages is influenced by the substrate (<em>i.e.</em>, macrophyte organ), as this can not only promote high diversity and equitability but can also be a predictor of dissimilarity in the distribution and frequency of occurrence of microalgae. These results reinforce the findings of other studies that have shown that macrophytes play an important role in structuring the periphyton assemblages.

scholarly journals Accumulation of copper by the aquatic macrophyte Salvinia biloba Raddi (Salviniaceae)

2017 ◽  
Vol 78 (1) ◽  
pp. 133-139 ◽  
Author(s):  
F. Freitas ◽  
S. Lunardi ◽  
L. B. Souza ◽  
J. S. C. von der Osten ◽  
R. Arruda ◽  
...  
Keyword(s):  
Atomic Absorption Spectroscopy ◽  
Aquatic Ecosystems ◽  
Copper Content ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Control Treatment ◽  
Aquatic Environments ◽  
Cu Accumulation ◽  
Interaction Treatment ◽  
Effect Of Copper

Abstract Aquatic macrophytes have properties and mechanisms which are useful for the removal of substances in solution, commonly used in phytoremediation processes in aquatic environments. This study evaluated the performance of copper (Cu) accumulation by Salvinia biloba Raddi (Salviniaceae) in different metal concentrations (1, 3 and 5 µg mL-1), as well as the control treatment, measured at intervals of 0, 7 and 14 days under laboratory conditions, with control as to pH and luminosity. After the experiment, the S. biloba biomass was washed, kiln dried, crushed and subjected to the process of digestion, and subsequently the accumulated copper content was determined by atomic absorption spectroscopy. The results showed that S. biloba is apt at accumulating copper, varying significantly between different treatments and days of exposure to the contaminant, as well as its interaction (treatment × days). The highest accumulation values were observed in treatment with 5 µg mL-1, which at 14 days, with 11,861 µg g-1 of copper. We observed symptoms of toxicity and mortality in plants, probably indicating the effect of copper on the species when at high levels. Salvinia biloba is an efficient species in the removal of copper in solution, its recommendation as a remediating agent in aquatic ecosystems being possible.

scholarly journals Population dynamics and net primary production of the aquatic macrophite Nymphaea rudgeana C. F. Mey in a lotic environment of the Itanhaém River basin (SP, Brazil)

2000 ◽  
Vol 60 (1) ◽  
pp. 83-92 ◽  
Author(s):  
A. F. M. CAMARGO ◽  
E. R. FLORENTINO
Keyword(s):  
Population Dynamics ◽  
Primary Production ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Net Primary Production ◽  
Growth Period ◽  
Pistia Stratiotes ◽  
Annual Productivity ◽  
Lotic Environment ◽  
Low Levels

In this paper we evaluated the population dynamics and obtained estimates of the net primary production of the aquatic macrophyte Nymphaea rudgeana in an arm of the Itanhaém River (São Paulo State, Brazil). This species presents, in the studied area, a broad seasonal variation of biomass. As from November (13.1 g DW/m²) we observed a gradual increase of biomass that reached a maximum in February (163.1 g DW/m²). Then, the biomass decreased, maintaining low levels until a new growth period. The reduction of biomass is associated to the development of floating aquatic macrophytes (Pistia stratiotes and Salvinia molesta) and, subsequently to environmental factors (higher salinity values) that are unfavorable to their development. The net primary production of N. rudgeana was estimated from the biomass data, and the annual productivity value was estimated between 3.02 and 3.82 t/ha/year.

scholarly journals Suitability of Macrophytes for Wastewater Treatment and Biogas Generation

2019 ◽  
Vol 9 (2S2) ◽  
pp. 16-18
Keyword(s):  
Wastewater Treatment ◽  
Water Hyacinth ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Cow Dung ◽  
Water Lettuce ◽  
Before And After ◽  
Almost All

In this paper three sustainable approaches are made in waste management option. Firstly primary treated domestic sewage is treated by aquatic macrophytes using duckweed, water hyacinth and water lettuce. Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), Phosphate, Nitrates are tested before and after. Result indicates in terms of water quality, almost all three plants shows same removal efficiencies. BOD and TSS removal efficiency is attained more than 95%. COD and TDS removal is reached upto 50% for almost all plants. Secondly the used aquatic macrophytes for wastewater treatment is again used for generation of biogas (water lettuce unit, duckweed unit, water lettuce unit). In addition to three aquatic macrophytes, sludge is collected from aquatic macrophyte unit for generation of biogas. Comparison is made with conventional cow dung biogas unit. Result indicates water lettuce and duckweed produce biogas at earlier stage itself and water hyacinth takes some time for starting of biogas production. This may be due to the structure and texture causes some time for decomposition. Sludge gives maximum biogas generation among all experimental setup. Also in this study cow dung did not give biogas more may be due to poor blend ratio of cow dung with water is one of the reason.

scholarly journals Aquatic macrophyte community varies in urban reservoirs with different degrees of eutrophication

2014 ◽  
Vol 26 (2) ◽  
pp. 129-142 ◽  
Author(s):  
Suelen Cristina Alves da Silva ◽  
Armando Carlos Cervi ◽  
Cleusa Bona ◽  
André Andrian Padial
Keyword(s):  
Species Richness ◽  
Temporal Variation ◽  
Indicator Species ◽  
Beta Diversity ◽  
Aquatic Macrophytes ◽  
Aquatic Macrophyte ◽  
Wiener Index ◽  
Spatial And Temporal Variation ◽  
Macrophyte Community ◽  
Aquatic Macrophyte Community

AIM: Investigate spatial and temporal variation in the aquatic macrophyte community in four urban reservoirs located in Curitiba metropolitan region, Brazil. We tested the hypothesis that aquatic macrophyte community differ among reservoirs with different degrees of eutrophication. METHODS: The reservoirs selected ranged from oligotrophic/mesotrophic to eutrophic. Sampling occurred in October 2011, January 2012 and June 2012. Twelve aquatic macrophytes stands were sampled at each reservoir. Species were identified and the relative abundance of aquatic macrophytes was estimated. Differences among reservoirs and over sampling periods were analyzed: i) through two‑way ANOVAs considering the stand extent (m) and the stand biodiversity - species richness, evenness, Shannon-Wiener index and beta diversity (species variation along the aquatic macrophyte stand); and ii) through PERMANOVA considering species composition. Indicator species that were characteristic for each reservoir were also identified. RESULTS: The aquatic macrophyte stand extent varied among reservoirs and over sampling periods. Species richness showed only temporal variation. On the other hand, evenness and Shannon-Wiener index varied only among reservoirs. The beta diversity of macrophyte stands did not vary among reservoirs or over time, meaning that species variability among aquatic macrophyte stands was independent of the stand extent and reservoir eutrophication. Community composition depended on the reservoir and sampling period. CONCLUSIONS: Our results support our initial expectation that reservoirs of different degrees of eutrophication have different aquatic macrophyte communities. As a consequence, each reservoir had particular indicator species. Therefore, monitoring and management efforts must be offered for each reservoir individually.

Diversity of macrophytes in the Amazon deforestation arc: information on their distribution, life-forms and habits

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Ana Luísa Biondi Fares ◽  
Raimundo Luiz Morais de Sousa ◽  
Ely Simone Cajueiro Gurgel ◽  
André dos Santos Bragança Gil ◽  
Carlos Alberto Santos da Silva ◽  
...  
Keyword(s):  
Aquatic Ecosystems ◽  
Aquatic Macrophytes ◽  
Anthropogenic Activities ◽  
Life Forms ◽  
Biological Processes ◽  
Macrophyte Species ◽  
Form Part ◽  
Arc Of Deforestation ◽  
Northern Brazil ◽  
Suitable Habitats

Abstract The Amazon possesses the largest fluvial system on the planet, harboring a diverse biota. Still, many species remain undescribed, because of the Amazon’s immense scale and complexity, and because many habitats are now increasingly under pressure from anthropogenic activities. Macrophytes are important to physical and biological processes in aquatic ecosystems but remain poorly studied in Northern Brazil. The objective of this study was to provide a checklist of macrophyte species that occur in municipalities that form part of the Arc of Deforestation, Pará state, Brazil, bringing information on their habits and life-forms. We sampled 36 sites at three types of aquatic ecosystems (streams, ponds and lakes). In total, we recorded 50 species, 38 genera and 24 families. Most species were amphibious or emergent. Degraded streams have environmental characteristics similar to lentic habitats, which could provide more suitable habitats for macrophytes that otherwise would not occur in lotic habitats, thus explaining the higher diversity in these ecosystems. Macrophyte diversity in this region follows similar patterns to other Brazilian regions. This study contributes to the assessment of aquatic macrophytes in the Amazon, especially in more degraded regions, such as the Amazon deforestation arc.

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