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Map of the study area in Solís Grande Stream estuary showing the positions of the 24 sampling stations.
Source publication
The analysis of 24 quantitative macrobenthic samples taken from the Solís Grande Stream estuary yielded 10 species from a total of 4,446 individuals. It was verified that both species richness and diversity was lower than those recorded in nearby regions with similar environmental conditions. In contrast with other studies, a marked dominance of an...
Contexts in source publication
Context 1
... Solís Grande Stream (Fig. 1) is situated in the southeast littoral of Uruguay between the 34º22'26" and 34º47'52" of south latitude and bet- ween the 55º33'04" and 55º22'34" of west longitude. It is an important component of a permanent running system of the country called "Vertiente del Río de la Plata". The area of its basin has appro- ximately 1,409 km 2 ...
Context 2
... samples were collected during October, 1995, in 24 points, distributed syste- matically along 3 longitudinal lines parallel to the stream banks and 8 transversal transects from the mouth to near 10 km upstream (Fig. 1). To each transversal transect corresponded three sampling sites. In order to verify the occurrence of a gradient of salinity the longitudinal axis was chosen. The transversal axis instead, was chosen to take into account the sediment variations observed in the preliminary sampling carried out in August of the same ...
Similar publications
The community structure and distribution of macrozoobenthos has been examined monthly, from March to November 2005, at depths from 0.5 to 1.5, 35 to 45 and 70 to 82 m, in Izvoru Muntelui - Bicaz reservoir. A total of 23 species were identified. Species richness in sampled areas ranged from 20 in shore zone, with abundances dominated by Tubificidae...
Citations
... There is a lot of mud with various remaining mangrove leaf litter in the basal area of the mangrove ecosystem of the Reuleng River. This mangrove litter is utilized by various aquatic fauna [16] and benthic fauna is a very important link in the estuary ecosystem [17]. The abundance and diversity of Macrozoobenthos are also strongly influenced by changes in water quality and the substrates in which they live and Macrozoobenthos as a bioindicator can be based on biotic index [18]. ...
The Reuleng River is a mangrove area located in Aceh Besar district. Environmental changes that occur in the structure and composition of the mangrove ecosystem in the Reuleng River affect the macrozoobenthos conditions in the area. This study aims to determine the structure of the makrozoobenthos community as a biomomonitoring instrument in the mangrove ecosystem area. The study was conducted from February 2021 to May 2021. Determination of the sampling location was carried out using the purposive sampling technique and sampling was determined in three areas, namely upstream, middle stream, and downstream. The results showed that there were 19 species grouped into 4 genera and 12 families. The Macrozoobenthos Diversity Index in the Reuleng River area ranges from 2.62. The species that dominate the mangrove ecosystem area is the Faunus ater species with a dominant index value (0.16) and the lowest dominant species in the mangrove ecosystem is Thalassina anomala (0.01). No specific species were found that dominate the area. Based on descriptive observations, there is a group of Makrozoobenthos that has a relationship with the psychochemical quality of the air. The results show that the balance of the community in the area is still vulnerable and experiencing the impact of environmental pressures.
... Abiotic metrics, such as salinity, are used to evaluate estuarine environments precisely because community composition is strongly influenced by the saline gradient (Medeiros et al., 2021;Menegotto et al., 2019). Besides salinity, other abiotic parameters such as dissolved oxygen, temperature and sediment granulometry are also very relevant (Crespo et al., 2017;Ganesh et al., 2014;Muniz and Venturini, 2001). Another important group of metrics widely used in studies is metals concentration, given the long-term damages that they cause on the ecosystems and communities (Berezina et al., 2017;Chainho et al., 2008;Puente and Diaz, 2008). ...
estuaries using biotic indicators. We aimed (1) to describe the current landscape of the scientific production on the topic; (2) to characterize the most productive/influential authorships and the organization of scientific collaboration; (3) to analyze the most used biotic integrity indices, metrics and methods. After the survey process, separation, and analysis, 334 publications were selected between the years 1990 and 2021 that met all stablished criteria. The results indicated an increase in the number of publications along the years, but there are still few researchers working on the subject. European countries (mainly Spain and Portugal) and the USA dominate the scientific production, possibly due to the promulgation of legal guidelines in these countries regarding environmental assessments in estuaries. In this context, a concentrated scientific collaboration linked to European authors stands out. The Spanish author Angel Borja is the author with the most influential scientific production, with participation in the development of two of the biotic indexes most used (AMBI and MAMBI). Among the most used indicators are the benthic macroinvertebrates, followed by the fish. We found that the most used metrics are related to community composition (e.g., richness, abundance, biomass), abiotic parameters (e.g., salinity, temperature), and pollutants (e.g., metals). Our results indicate that methodological issues are still of great concern, given the absence of standardization among studies. Another relevant aspect is the large gap of studies in tropical countries, which keep applying indices not developed for their regional particularities. The results of this study highlight the need for more studies in tropical regions, on the sensitivity of the species and about methodological aspects, which can greatly contribute for the development of the field.
... Ficopomatus enigmaticus(Fauvel 1923) Aguas abajo, cuyo primer registro en Uruguay es del año 1938 en el Arroyo Las Brujas (San José)(Monro 1938) y más recientemente reportado en el Arroyo Solís Grande(Muniz & Venturini 2001) sistemas muy similares al Arroyo Solís Chico.Así como Corbicula fluminea se detectó su presencia aguas arriba, esta especie está presente en muchos arroyos de nuestro país. Ambas especies se encuentran incluidas en la lista de especies exóticas invasoras elaborada por el Comité Nacional de Especies Exóticas Invasoras(Aber, et al., 2012). ...
Resumen
La gestión del agua es una temática compleja que requiere de diversos abordajes involucra diversos actores como organismos públicos (OSE, DINACEA, MGAP, entre otros), la academia, así como de la sociedad en su conjunto. Un ejemplo de participación en la gestión del agua son las comisiones de cuenca. Allí se abordan diferentes temáticas asociadas al uso de los servicios ecosistémicos que brindan los sistemas acuáticos. Los trasvases de agua se implementan a nivel mundial para satisfacer la creciente demanda de agua para consumo humano. Existen muchos ejemplos de las consecuencias negativas de estos emprendimientos sobre todo cuando se conectan cuencas lejanas o muy diferentes. Extraer agua de una cuenca y verterla en otra tiene un efecto en el régimen hidrológico natural de ambos sistemas. Modifica los procesos naturales y los patrones fisicoquímicos y biológicos, conduce a la homogeneización de las comunidades, y puede favorecer la transmisión potencial de parásitos. El presente informe incluye las listas de especies de organismos y sus abundancias colectadas en los sitios preseleccionados del sistema donante (A° Solís Chico) y receptor (Laguna del Cisne). Las comunidades estudiadas presentaron diferencias entre ambos sistemas (i.e. laguna vs arroyo), es importante mencionar que no se capturaron especies exóticas en el sitio próximo a la toma del trasvase en el A° Solís Chico, pero si en el sitio aguas arriba de la toma como el bivalvo Corbícula fluminea (o.f. Müller, 1774) y aguas abajo el poliqueto Ficopomatus enigmaticus (Fauvel, 1923). Solo se capturaron especies exóticas de peces en el sitio A° Solís Chico Aguas Abajo de la toma. Estas especies probablemente ingresan a través del Río de la Plata; sin embargo, la presencia de una serie de saltos de agua impediría el ingreso de agua salobre y de dichas especies hacia sitios próximos a la toma. La variación estacional en la estructura de la comunidad demuestra la importancia de considerar las fluctuaciones naturales en la planificación y gestión de los ecosistemas acuáticos. Es importante continuar con el monitoreo de las comunidades en la Laguna del Cisne y el Arroyo Solís Chico para identificar y detectar potenciales movimientos de especies entre ambos sistemas como consecuencia del trasvase.
... RA and OR values were expressed as percentages [21]. The species were classified in constant (OR ≥ 50%), common (10 ≤ OR < 50%) and rarely species (OR < 10%) [22]. ...
... Anodonta anatina (13.02%) were the most abundant. The occurrence analysis also showed that they were constant species in Azagny Channel [22]. Several reasons can justify the abundance of gastropods: they have a longer life cycle; they also have the ability to hide in the substrate and escape predators [38]. ...
The Azagny Channel is an estuarine ecosystem connecting Ebrié Lagoon to Bandama River estuary and it is adjacent to Azagny National Park. The aim of this study was to provide the first data on diversity and structure of macroinvertebrates in this estuarine area. Physicochemical parameters were measured monthly in three sampling stations S1, S2 and S3, and the benthic Macroinvertebrates was collected using a Van Veen grab. A total of 28 taxa distributed among 20 families and 11 orders belonging to Annelida, Mollusca, Crustacean and Insecta were collected. The taxonomic richness and diversity were higher in S1 compared to S2 and S3, probably due to its proximity to Bandama estuary. The relative abundance revealed that mollusks represented mainly by Pachymelania aurita (16.04%), P. fusca (15.83%), Anodonta anatina (13.02%) dominated the species assemblage; followed by crustaceans with Macrobrachium vollenhovenii (31.87%) and Potamon sp. (5.01%). Canonical correspondence analysis revealed that the main factors that influenced macroinvertebrates distribution in Azagny Channel were conductivity, salinity and Total Dissolved Solids (TDS). There is a strong correlation between these three abiotic factors and their influence on species assemblage would be linked to proximity of study area to Atlantic Ocean. These findings provide valuable information that can be used to establish biotic indices to monitor the water quality of Azagny Channel.
... This pattern was clearer at the Una estuary with a total of 13 taxa of which 6 were exclusively found in the lower estuarine zone. In fact, higher richness values in the lower estuarine zone has been observed in relation to subtidal macrofauna in the northeast of Brazil (Barros, Blanchet, Hammerstrom, Sauriau, & Oliver, 2014; Barros, De Carvalho, Costa, & Hatje, 2012;Barros et al., 2008;Ourives, Rizzo, & Boehs, 2011) in the south of Uruguay (Cortelezzi, Capítulo, Boccardi, & Arocena 2007;Muniz & Venturini, 2001) and in the Gulf of Mexico (Pollack, Palmer, & Montagna, 2011;Van Diggelen & Montagna, 2016). For intertidal macrofauna, until now, this pattern was only found in temperate estuaries (Giménez, Borthagaray, Rodríguez, Brazeiro, & Dimitriadis, 2005;Ysebaert, Meire, Maes & Buijs, 1993). ...
The integration of biodiversity knowledge with management needs in coastal protected ecosystems is a current challenge that requires a social-ecological perspective, especially in view of the current scenario regarding climate changes. At the southeastern Brazil, estuaries inside protected areas highlight as a great source of ecosystem services connected to the biodiversity, such as the food provisioning for local communities (i.e. fishery supply). However, climate change models considering the last four decades alert to an annual rainfall increase in the region, threatening the estuarine biodiversity and its associated ecosystem services. Here, we evaluated how estuarine macrofaunal distribution could be used as ecological indicators to support the stakeholders management needs in subtropical Marine Protected Areas (MPAs). The intertidal macrofauna distribution was assessed along physical gradients in estuaries within MPAs of the southeastern Brazil, testing the effects of salinity and sediment properties on taxa richness. Then, implications of these ecological findings were discussed with the local users and managers of the MPAs, aiming to stipulate indicators and management proposals considering the rainfall increase predicted for the region. We found that macrofauna community varied between estuarine zones along the physical gradients. High values of mud and organic content in the sediment were correlated with reduced taxa richness in the upper estuarine zone, indicating high vulnerability of biodiversity to a possible estuarine mud input connected to the expected rainfall increase. Stakeholders noted that this knowledge could assist with spatial planning for an adaptive management of the biodiversity use rules on the MPAs, with focus on the ecosystem services conservation (ecosystem-based management). Stakeholders suggested using biodiversity hotspots to guide estuarine areas classification (no-take zones and sustainable use zones), maintaining the resources use rules adaptable according to the biodiversity changes. In this regard, our data revealed important bioindicators, such as the macrofaunal richness, which can be monitored as "early signals" to assess eventual ecosystem alterations related to the climate changes. These signals can include loss in taxa richness, extirpation of species exclusively found on the lower estuarine zone (sensitives to mud input) and changes in the distribution or abundance of dominant taxa. We suggest that understanding the relationships between macrofaunal indicators and ecosystems services, associated with continuous monitoring, are the key steps to implementing an adaptive ecosystem-based management of these protected estuaries in the current changing scenario, contributing to decision making at local scale that respond to global challenges, as the UN Ocean Decade.
... Then, 54 and 83 km from Montevideo are Solís Chico (Fig. 30.8) and Solís Grande, with sandy bars and plains of alluvial deposits at their mouths, supporting halophytes occupied by crabs. Solís Grande (Fig. 30.9) has greater ocean exposure, with estuarine characteristics extending 10 km upstream (Muniz & Venturini, 2001). Chebataroff (1983) studied the fauna and flora of marsh systems. ...
The Río de la Plata drains waters of the second largest basin of South America. The coast of Uruguay is located in a high dynamic area, where the interactions between the Río de la Plata and the Atlantic Ocean produce an important patterns of natural variability. Alongside this, the area is under growing local and regional human pressure. The Uruguayan coast is affected directly and indirectly by activities developed in the drainage basin. La Plata Basin is densely populated and heavily industrialized with significant pollution. The Paraná and Uruguay Rivers and their tributaries contribute xenobiotics and nutrients, especially during the ENSO phases, when important discharges of freshwater affect the whole coast. Unsurprisingly, the most impacted region is near Montevideo, while, in general, the pollution and/or impact level in the small estuaries along the Río de la Plata coastline is slightly lower. Although available environmental information in the Uruguayan coastal zone has improved during recent decades, it is still restricted to isolated areas and to some aspects of aquatic ecosystems only. The development and implementation of integrative baseline studies on these topics are highly relevant, in order to contribute to the conservation of these ecosystems in Uruguay.
About the environmental quality of the North coast of Río de la Plata estuary.
Information about environmental perturbation in the Uruguayan coastal zone has improved, but is still restricted to isolated areas and to some aspects of aquatic ecosystems only. Studies concerning benthic processes and faunal community patterns
in subtidal coastal zones, the continental shelf, slope and abyssal plains are of primary importance. Development of integrated studies on these topics are highly relevant, in order to contribute to their conservation.
As invasive species are often the main factors causing ecological degradation, the establishment of national and international
research programs to minimize the impacts of exotic species, and to develop models that predict the introduction of new invaders are crucial. With knowledge of the distribution, ecology, life history, and impacts of alien species, both at
national and regional scales, it should be possible to improve management and control. Since shipping traffic appears to be
the most important introduction vector, we emphasize the need for effective controls on ballast water discharges in harbors.
The prevention of such a problem is always easier, less expensive, and more effective than its eradication.
Major challenges for the future are related to the prevention of biological diversity loss by habitat loss and degradation,
climate change, excessive loading of nutrients and other forms of contamination, by overexploitation and unsustainable use
of natural resources, and by invasive alien species. Also, an increase in the coverage of terrestrial, coastal, and marine PAs,
especially in open waters, including better representation of the broad range of ecosystems and ecological processes and
services, are needed. These should improve the connectivity between PAs and the conservation status of threatened species,
and help in managing them effectively by assessing and recording costs as well as social, economic, and environmental
benefits. Finally, it is important to strengthen the participation and capacities of local communities in the management of
PAs for the solution of actual conflicts.
... A una distancia de 15 km de este arroyo y hacia el este se sitúa el Arroyo Solís Chico de dimensiones similares al A° Pando pero menos urbanizado en sus alrededores. Con una cuenca cercana a 659 km 2 (Tabla 1) y más expuesto a la incidencia oceánica, se localiza el Arroyo Solís Grande cuya área estuarial se extiende más allá de 10 km río arriba desde su desembocadura (Muniz & Venturini 2001, Gurdek et al. 2013). ...
En este capítulo se estudió la diversidad y la estructura de la asociación de
peces de 11 estuarios, los cuales tienen comunicación con el Río de la Plata
(RdlP) y el Océano Atlántico (OA). La ictiofauna presentó 45 familias y 98 especies.
La combinación de procesos oceanográficos y meteorológicos afecta
la distribución espacio temporal de la salinidad y temperatura produciendo un
patrón espacial en la biodiversidad en dirección oeste-este, especialmente en el RdlP y su área de influencia. El estuario Santa Lucía mostró especies de
agua dulce mientras otros estuarios fueron dominados por especies estuariales
y marinas. La ictiofauna del estuario Pando presentó semejanzas con la
composición y estructura de peces del Solís Chico y diferencias más notorias
con el Solís Grande. La composición de peces y las abundancias en las lagunas
costeras estuvo condicionada a los aportes de agua dulce y/o a la conexión
con el océano mediante la apertura de la barra. El estuario Chuy se
caracterizó por la presencia de especies marinas y estuariales comúnmente
distribuidas al sur de Brasil. Especies visitantes marinas, de agua dulce, marino
estuarino oportunistas y estuarino residentes estuvieron relacionadas con
la tipología estuarial. El uso diferencial de los estuarios estuvo ajustado a los
ciclos de vida de los peces que se mueven entre el RdlP estuarial y/o la costa
oceánica. Mayor abundancia de peces y estadios juveniles en el estuario
Pando ocurren por la cercanía al área de desove de la corvina blanca, lacha
y pescadilla de red en el RdlP. Los hábitats juveniles en los estuarios destacan
la esencialidad y la conectividad con actividades reproductivas en el RdlP y
OA. Actividades antrópicas han modificado los ambientes y provocado alteraciones
genéticas en los peces, caso del estuario Pando. Los estuarios uruguayos
constituyen un valioso recurso natural, único, frágil y limitado que
requiere una gestión integral para su conservación y sustentabilidad.
... The collection site is located in sandy/muddy riverbank with the presence of the smooth cordgrass Spartina alterniflora LOISEL (Poaceae), the spiny rush Juncus acutus LINNAEUS (Juncaceae) and the crab Neohelice granulata (DANA, 1851). The organic matter content in the sediments is high, in comparison with other studies for estuarine systems of similar latitudes (SEYS et al., 1994;IENO;BASTIDA, 1998;MUNIZ;VENTURINI, 2001). ...
... The collection site is located in sandy/muddy riverbank with the presence of the smooth cordgrass Spartina alterniflora LOISEL (Poaceae), the spiny rush Juncus acutus LINNAEUS (Juncaceae) and the crab Neohelice granulata (DANA, 1851). The organic matter content in the sediments is high, in comparison with other studies for estuarine systems of similar latitudes (SEYS et al., 1994;IENO;BASTIDA, 1998;MUNIZ;VENTURINI, 2001). ...
A comparative study on size and shape of Leptuca uruguayensis was carried out between populations from Garças River, Brazil (BP), and Solís Grande River, Uruguay (UP). The size of the onset of sexual maturity was also estimated for UP. A total of 36 crabs BP and 387 crabs UP were analyzed. In the relative growth analysis, carapace width (CW) for both sexes, major cheliped length (LMC) for males and abdomen width (AW) for females were measured. The centroid size of carapace (1.40±0.19 cm BP and 1.88±0.30 cm UP) and cheliped (1.16±0.22 cm BP and 1.58±0.45 cm UP) differed significantly (p<0.001). The shape also differed significantly (p<0.001), having UP wider carapace than BP, rostrum projected forward and posterior margin positioned more anteriorly; the cheliped of UP was also wider than BP. In UP, males' CW ranged 4.28-19.5 mm and females' 2.53-16.3 mm CW; males' LMC ranged 1.79-31.60 mm and females' AW, 0.80-8.53 mm. The onset of sexual maturity of UP was estimated in 12.20 mm CW for males and 7.81 mm for females. These differences are likely related to abiotic variables acting distinctly in the two localities.
... A partir de 2000, se realizaron varios estudios de ecología en la zona de Montevideo y costa Este del país, que empiezan a considerar a los poliquetos como ítem importante en la estructuración de las comunidades y a nivel del ecosistema en general (Muniz & Venturini 2001Giménez et al. 2003Giménez et al. , 2005Lercari & Defeo 2003Muniz et al. 2004Muniz et al. , 2005Muniz et al. , 2006Muniz et al. , 2011Bergamino et al. 2009;Hutton et al. 2015). Estos estudios registran de forma más continua contribuciones de investigadores uruguayos que incluyen información acerca de poliquetos, mayormente información de tinte ecológico y ambiental, focalizando el uso de poliquetos como indicadores de diferentes grados/ tipos de perturbaciones ambientales. ...
... Igualmente, se destaca también su importancia ecológica como sitios de cría y reproducción de varias especies, inclusive de interés comercial. En estos ambientes de transición, se han reportado un total de 14 especies, estando 9 de ellas presentes en la desembocadura de ríos/arroyos y 8 en las lagunas costeras (Giménez et al. 2005(Giménez et al. , 2006(Giménez et al. , 2014Muniz & Venturini 2001;Muniz et al. 2012;Meerhoff et al. 2013;Scarabino 2006 y referencias allí citadas). Las especies registradas pertenecen a las familias Capitellidae, Nereididae, Nephtyidae, Spionidae, Onuphidae, Glyceridae, Goniadidae, Serpulidae y Paraonidae. ...
... A partir de 2000, se realizaron varios estudios de ecología en la zona de Montevideo y costa Este del país, que empiezan a considerar a los poliquetos como ítem importante en la estructuración de las comunidades y a nivel del ecosistema en general (Muniz & Venturini 2001Giménez et al. 2003Giménez et al. , 2005Lercari & Defeo 2003Muniz et al. 2004Muniz et al. , 2005Muniz et al. , 2006Muniz et al. , 2011Bergamino et al. 2009;Hutton et al. 2015). Estos estudios registran de forma más continua contribuciones de investigadores uruguayos que incluyen información acerca de poliquetos, mayormente información de tinte ecológico y ambiental, focalizando el uso de poliquetos como indicadores de diferentes grados/ tipos de perturbaciones ambientales. ...
... Igualmente, se destaca también su importancia ecológica como sitios de cría y reproducción de varias especies, inclusive de interés comercial. En estos ambientes de transición, se han reportado un total de 14 especies, estando 9 de ellas presentes en la desembocadura de ríos/arroyos y 8 en las lagunas costeras (Giménez et al. 2005(Giménez et al. , 2006(Giménez et al. , 2014Muniz & Venturini 2001;Muniz et al. 2012;Meerhoff et al. 2013;Scarabino 2006 y referencias allí citadas). Las especies registradas pertenecen a las familias Capitellidae, Nereididae, Nephtyidae, Spionidae, Onuphidae, Glyceridae, Goniadidae, Serpulidae y Paraonidae. ...
