Maria Cristina Dreher Mansur - Profile on Academia.edu (original) (raw)

Papers by Maria Cristina Dreher Mansur

Protected areas and native freshwater bivalves are not in the same place in south‐east Brazil

Aquatic Conservation-marine and Freshwater Ecosystems, Nov 28, 2022

Isolamento de bactérias do Lago Guaíba visando a prospecção de agentes de biocontrole do mexilhão dourado, Limnoperna fortunei (Dunker, 1857)

Species movements within biogeographic regions: exploring the distribution of transplanted mollusc species in South America

Biological Invasions

The movement of species is among the most serious environmental threats of the new millennium, as... more The movement of species is among the most serious environmental threats of the new millennium, as the transplantation of species beyond their native or historical range has intensified in the last five decades. Traditionally, studies on bioinvasions have focused on species that have been introduced, deliberately or accidentally, to biogeographic regions where they did not previously occur. However, less attention has been given to species movement to novel areas within the same biogeographic region. Our research group, the South America Introduced Molluscs Specialists, analyzed potential cases of native South American mollusc species introduced deliberately or accidentally beyond their natural range within South America. To achieve this, it is key to differentiate between anthropogenic processes and passive responses to environmental conditions. We considered the past and current spatial distribution of species, analyzed known or putative vectors, and discuss the impacts of taxonomic and nomenclatural knowledge. Based on the evidence currently available, we propose different scenarios to explain observed changes in mollusc distributions within South America. Seventeen transplanted mollusc species (TMS) were recognized, considering marine, freshwater, and terrestrial environments. Of the 189 South American ecoregions 31 were occupied by transplanted species, but this proportion varied by environment: 10 of 28 marine ecoregions, 12 of 52 freshwater ecoregions, and 9 of 109 terrestrial ecoregions. The ecoregions with TMS are generally located in the peripheral zones of the continent. Those with the highest number of TMS were the Southern Caribbean (three species) in the marine environment, the Central Andean Pacific Slopes (three species) in the freshwater environment, and the Alto Paraná Atlantic forests (two species) in the terrestrial environment. The number of unintentionally moved TMS is greater than those moved intentionally. The transplantation process is similar to the introduction and settlement process of non-native mollusc species, and so is their impact.

Thorp and Covich's Freshwater Invertebrates, 2019

Skeletal Skeletal-Mantle may secretes a shell. Use hydrostatic pressure for ventral muscular foot... more Skeletal Skeletal-Mantle may secretes a shell. Use hydrostatic pressure for ventral muscular foot hydrostatic pressure for ventral muscular foot. Muscles Muscles -Ventral muscular foot and other muscles present muscles present. Digestive Digestive-complete complex with salivary glands, digestive gland and Rasping tongue (Radula) digestive gland and Rasping tongue (Radula). Circulatory Circulatory -Open except for Cephalopoda. Dorsal heart usually in a pericardial cavity Dorsal heart, usually in a pericardial cavity. Respiratory Respiratory -Ctenidia (gills) in mantle cavity, respiratory pigment is copper respiratory pigment is copper.

Este trabalho descreve a distribuicao de especies de moluscos exoticos invasores na Bacia do Rio ... more Este trabalho descreve a distribuicao de especies de moluscos exoticos invasores na Bacia do Rio Miranda, tributario do rio Paraguai. A Bacia do Rio Miranda, com rios de aguas calcareas e cristalinas, e conhecida pela abundância de moluscos nativos, que podem ser observados por turistas do mundo todo na regiao de Bonito-MS, sendo essa regiao considerada o melhor destino de ecoturismo do Brasil. A diversidade de especies de moluscos pode ser comprovada visualmente, apesar de pouco conhecida, e pode estar ameacada pela presenca de especies exoticas invasoras, que estao amplamente distribuidas na bacia e ja predominam em alguns rios. As especies do genero Corbicula (C. fluminea e C. largillierti) foram observadas em 64% das areas amostradas, em muitos casos co-ocorrendo, incluindo algumas areas altas da bacia. O gastropode Melanoides tuberculata foi registrado em 56% das areas. No trecho do Rio Miranda abaixo do rio Formoso, co-ocorreram tres especies exoticas invsoras (C. fluminea, C....

Morfologia e microanatomia comparada de Bartlettia stefanensis (MORICAND, 1856) e Anodontites tenebricosus (LEA, 1834) (Bivalvia, Unionoida, Muteloidea)

Reproductive pattern of the aggressive invader Limnoperna fortunei (Bivalvia, Mytilidae) in South America

Invertebrate Reproduction & Development, 2016

Abstract Limnoperna fortunei is an aggressive freshwater invader species recorded for the first t... more Abstract Limnoperna fortunei is an aggressive freshwater invader species recorded for the first time in 1991 at Balneario Bagliardi, Río de la Plata Estuary, Argentina. Since then it has spread rapidly within South America. We tested the hypothesis that invasive species need a time span for the development of a reproductive pattern once settled in a new environment. We analyzed the reproductive cycle of a population of L. fortunei from Guaiba Lake (29°55′S; Rio Grande do Sul, Brazil) and compared it with previous studies at Balneario Bagliardi (34°52′S). We studied 834 specimens from Guaiba, following routine histological techniques. At any sampled period, the highest proportion of specimens were mature and gonads showed no resting periods. Female gonad maturation periods and oocyte growth were recorded throughout the year. Five periods of spawning of different intensity were differentiated. The reproductive pattern of the Guaiba population showed more spawning events and a remarkable recovery capacity of the female gonad compared to the Balneario Bagliardi population. The reproductive patterns of L. fortunei from Guaiba two years after invasion shows similarities with the reproductive pattern described previously from Balneario Bagliardi after two and three years of invasion.

Redescricao de Mycetopoda legumen (Martens, 1888) (Bivalvia, Mycetopodidae)

Revista Brasileira De Biologia, 1979

Distribuicao e consequencias apos cinco anos da invasao do mexilhao-dourado, Limnoperna fortunei no estado do Rio Grande do Sul, Brasil (Mollusca, Bivalvia, Mytilidae)

Biociencias, 2004

Journal of Plankton Research, 2007

Revista Biotemas, 2007

1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Urugua... more 1Museu de Ciências Naturais, Pontifícia Universidade Católica do Rio Grande do Sul, Campus Uruguaiana, BR 472, Km 07, CEP 97500-970, Uruguaiana RS, Brasil 2Laboratório de Malacologia e Aqüicultura do Museu de Ciências e Tecnologia da Pontifícia Universidade Católica do ...

Colonization and Spread of Limnoperna fortunei in South America

Limnoperna Fortunei, 2015

The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started wit... more The invasion of the exotic bivalve Limnoperna fortunei (Dunker 1857) in South America started with its introduction, presumably with ballast water from transoceanic ships trading with Southeast Asia, in the Rio de la Plata estuary (Argentina) around 1990. From there, it spread swiftly to cover most of the Rio de la Plata basin, as well as the basins of Guaiba and Tramandai (Brazil), Patos–Mirim (Brazil–Uruguay), and Mar Chiquita (central Argentina). These smaller watersheds were most probably colonized as a result of secondary human-mediated introductions from waterbodies of the Rio de la Plata basin. L. fortunei is now present in five South American countries: Argentina, Bolivia, Brazil, Paraguay, and Uruguay. Expansion was much faster along navigable waterways, especially the Parana River and its tributaries (around 250 km/year), and slower elsewhere (Upper Paraguay and Uruguay rivers and their tributaries). Over 20 years after its introduction in South America, new waterbodies are still being colonized by L. fortunei (e.g., the first records of the mussel in the Peixoto and Itapeva lakes, Tramandai River system, date from 2013). Mussels have not been recorded in a few rivers of the Rio de la Plata basin where their survival seems to be limited by excessively high suspended solid loads or salinities, or by the fact that they periodically dry out (e.g., the rivers Bermejo, Pilcomayo, and Salado del Norte, in north-central Argentina). South American populations display a relatively high genetic differentiation, confirming that geographic spread is strongly dependent on human activities: vessel and barge traffic is the main vector that helps to disperse the mussel locally through upstream “jumps” of adults attached to ship hulls. Genetic studies also suggest that there have been multiple introductions. By early 2014, L. fortunei had not yet been reported from any of the other major South American watersheds (Amazon, Sao Francisco, Orinoco), but colonization of these basins is probably inevitable. Modeling of potential distribution based on habitat fitness indicates that extensive regions could support L. fortunei, including much of lowland South America, southern Mexico, the southeastern USA, Europe, and Africa.

Evaluation of materials and coatings to control incrustation by Limnoperna fortunei

Biotemas

Experiments aimed at selection of materials and coatings with antifouling properties for Limnoper... more Experiments aimed at selection of materials and coatings with antifouling properties for Limnoperna fortunei were conducted in southern Brazil, in two localities: next to the main stream of the Jacuí River, municipality of Porto Alegre, RS, and the reservoir of the UHE Ibitinga power plant, ...

Biological Invasions, 2020

Non-native species have been introduced at escalating rates during the last decades, mainly due t... more Non-native species have been introduced at escalating rates during the last decades, mainly due to the dispersion generated by the increasing trade and transport worldwide. Mollusks, the second largest metazoan phylum in terms of species richness, are no exception to this pattern, but, to date, a comprehensive synthesis of non-native mollusk species (NNMS) in South America was not available. For this purpose, an e-discussion group was formed with malacologists and taxonomists from South America, where we exchanged and analyzed bibliography, databases and information about NNMS, providing expert opinion to this assessment. The first list of non-native mollusk species for South America, considering terrestrial, freshwater and marine environments, includes 86 NNMS distributed in 152 ecoregions (terrestrial, freshwater and marine) of the 189 recognized for the South American continent. Information on their native region, vectors, first record for South America and distribution, are also provided. In the analysis of the distribution of the NNMS and the entry points of each species (e.g., ports, cargo and passenger airports, cities) and status of conservation of the ecoregions, four hot spots were recognized: Subtropical-Atlantic,

Strombus costatus (Mollusca, Gastropoda) na Ilha do Arvoredo em Santa Catarina, Brasil

Paxyodon syrmatophorus (MEUSCHEN, 1781) (Mollusca, Bivalvia, Unionoida) in the Curuá-Una reservoir, Santarém, Pará, Brazil

The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be... more The Curua-Una hydroelectric power plant which dams the river of the same name was the first to be constructed in the Amazon Basin. The project of this plant was not based on a study on environmental impact which was not required at the time. Therefore, no survey ...

Moluscos bivalves do Rio Uraricoera e Rio Branco, Roraima, Brasil

Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas... more Resumen es: Se listan las especies y subespecies vivientes de Bivalvia dulciacuicolas registradas para Uruguay (40 nativas mas 3 introducidas). Esta fauna esta comp...