Low-Tech Alternatives for the Rehabilitation of Aquatic and Riparian Environments

Basílico, Gabriel Omar; Cabo, Laura de; Faggi, Ana; Miguel, Sebastián

doi:10.1007/978-3-319-41811-7_18

Cited by 6 publications

(5 citation statements)

References 30 publications

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“…Esto se observa en especial hacia el sur del estuario, con un avance cada vez mayor del límite costero, dejando expuestas las raíces de plantas de mayor porte que no soportan el oleaje ni la permanente sumersión. Por ello, resulta fundamental establecer zonas piloto donde se proceda a implantar juncales, que al abrirse paso con sus rizomas y al formar renuevos permiten que se fijen las arenas limosas, se incorporen sólidos suspendidos, se autodepuren las aguas costeras y se estabilice una sucesión vegetal hacia la ribera (Basílico et al 2016).…”

Section: ₁₀₅₀ Lc A�� unclassified

Los invertebrados y la calidad del hábitat como indicadores de la condición biológica de la costa del Río de la Plata, Argentina

Armendáriz

Ambrosio²,

Spaccesi

et al. 2022

Ecol. Austral

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R��.Los estuarios son ecosistemas productivos que proporcionan bienes y servicios ecosistémicos, aunque el desarrollo humano provoca tensiones que deterioran la calidad de sus aguas. El Río de la Plata presenta relevancia geográfica y socioeconómica, además de áreas importantes en cuanto a la conservación de la biodiversidad. El objetivo de este estudio fue analizar algunas características estructurales y funcionales del ensamble de meso y macroinvertebrados a lo largo de 155 km del intermareal dulceacuícola, aplicando análisis multivariados y comparando los sitios de muestreo sujetos a diferentes tipos de perturbaciones antropogénicas. Se identificaron 58 taxones cuya abundancia total varió entre 570 y 345000 individuos/m 2 . Los valores más altos de riqueza, diversidad estructural y funcional, y porcentajes de taxones sensibles se registraron en áreas recreativas que presentan zonas costeras vegetadas, alto grado de conectividad y estado natural de los hábitats ribereños. El análisis multivariado ordenó a los sitios de muestreo a lo largo de un gradiente de turbidezconductividad, y a otro de eutrofización-contaminación. El análisis de conglomerados reveló los siguientes grupos: 1) sitios poco impactados de áreas protegidas y recreativas, 2) sitios con impacto antropogénico y descargas domésticas, 3) sitios altamente impactados por descargas industriales y cloacales, y 4) sitios ubicados en proximidad al frente de máxima turbidez. Estos resultados demuestran que las características del hábitat y del agua determinan los ensambles de invertebrados. Los descriptores estructurales y funcionales analizados pueden actuar de manera confiable en la evaluación de la calidad ecológica y la integridad biótica del sector intermareal rioplatense argentino.[Palabras clave: bioindicadores, estuarios, calidad del agua, zoobentos, América del Sur] A��. Invertebrates and habitat quality as indicators of the biological condition of the coast of the Río de la Plata river, Argentina. Estuaries are productive ecosystems that provide ecosystem goods and services, although human development causes stresses that deteriorate the quality of their waters. The Río de la Plata river presents geographic and socioeconomic relevance, besides areas of importance in the conservation of biodiversity. The objective of this study was to analyze some of the structural and functional characteristics of the meso and macroinvertebrate assemblage along 155 km of the freshwater intertidal zone, applying multivariate analysis and comparing the sampling sites subject to different types of anthropogenic disturbances. Fifty-eight taxa were identified whose total abundance ranged from 570 to 345000 individuals/m 2 . The highest values of richness, structural and functional diversity, and percentages of sensitive taxa were recorded in recreational areas that have vegetated coasts, a high degree of connectivity and a natural state of riparian habitats. The multivariate analysis organized the sampling sites along a turbidity-conductivity gradient and a e...

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Section: ₁₀₅₀ Lc A�� unclassified

Los invertebrados y la calidad del hábitat como indicadores de la condición biológica de la costa del Río de la Plata, Argentina

Armendáriz

Ambrosio²,

Spaccesi

et al. 2022

Ecol. Austral

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“…Using this approach, we found that the survival condition of the reintroduced macrophytes had been affected by a combination of social and environmental processes. Only a joint approach to rehabilitation could possibly manage it: socio-technical advances improving macrophyte retention in urban streams can be used to mitigate hydrological aspects of urban streams (Riis et al 2009, Basílico et al 2016; and changes in governance structures should be fostered to improve their survival success (Gleick 2018).…”

Section: Implications For Community-based Urban Stream Ecological Managementmentioning

confidence: 99%

Fostering urban transformations in Latin America: lessons around the ecological management of an urban stream in coproduction with a social movement (Buenos Aires, Argentina)

Graziano¹,

Groot²,

Pilato³

et al. 2019

E&S

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Collaborative community-based approaches are proposed as a way to overcome the difficulties exerted by a broad range of social-ecological traps that emerge at the reconfiguration of social-ecological systems onto sustainable paths. Despite this, a deep examination of the social-ecological processes and interactions that constrain these approaches in different urban contexts is still necessary to improve their success. Latin American countries have institutional, political, and social characteristics that could constrain the pathways to sustainability in different ways from countries of the Global North, particularly in their metropolitan areas. Here, we present an experience (2015-2018) held in cooperation with workers of a social cooperative framed in an urban social movement from Argentina, related to the ecological rehabilitation of a highly degraded urban stream through the management of the riparian vegetation and the reintroduction of native macrophytes. The methodology involved a codesign approach based on a set of participatory actionresearch tools, together with resilience system analysis through causal loop diagrams, and three different interventions of a 200-m reach at the upstream area of the San Francisco stream (Buenos Aires, Argentina). The participatory diagnostic showed a strong negative effect of the current management guidelines on the riparian and aquatic vegetation, reflecting a positive feedback loop that reinforces this negative state, and revealed a hierarchical governance regime associated with the management of the watershed. Furthermore, it detected a strong motivation of local workers to generate transformative actions in terms of the sanitary and social-ecological improvements of the local habitat. The management actions showed a relatively high short-term survival of the macrophyte transplants (30-60% in a period of 2-4 months), displaying a strong spatial structure of the survival units, and downscaling to about 10% in the long term (6-12 months after interventions). A combination of biophysical and social processes related both to institutional and rigidity traps affected the survival of the transplants, reflecting the inertia of the current management programs to ecological improvements of the stream. In summary, the present work highlights the social-ecological constraints arising from transformative collective actions toward the ecological management of a stream at a highly vulnerable and bureaucratic urban context, with implications for socialecological urban transformations in Latin America and the design of effective participatory governance actions in alliance with local social movements.

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“…These adverse conditions are at the same time recognized as the principal drivers that contribute to a magnification of the untoward consequences of storms within urban and periurban areas . Urbanization also has a negative impact on the riverbanks since the resulting loss of habitats there reduces the overall capacity of the hydrographic basin to filter nutrients and sediments, thus diminishing the quality of the water and undermining the health of the aquatic ecosystems (Alberti et al, 2007;Bunn et al, 2010;Basílico et al, 2016).…”

Section: à3mentioning

confidence: 99%

Ecosystem services of runoff marshes in urban lowland basins: proposals for their management and conservation

Armendáriz

Cortese

Rodríguez

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-The city of La Plata, Argentina, is situated in a low alluvial zone, with streams having insufficient drainage into the Río de la Plata estuary. In April 2013, a prodigious storm front caused unprecedented flooding in the city and environs that resulted in extensive loss of life and property, especially in the Del Gato stream basin. Through an analysis of water quality and the conditions of the habitat on the basis of the macroinvertebrates present as bioindicators of environmental quality, this work aims to contribute to a reevaluation of the role of the marshes adjacent to the stream as flood-alleviation elements, and then propose alternatives for flooding management in the basin. Consequently, quantitative seasonal samples of vegetation, sediments, and benthic organic matter were taken and limnologic parameters measured in three sectors of the basin having different land uses: rural, periurban, and urban-industrial. The macroinvertebrate assemblages, as analyzed through the application of ecological indices, exhibited a marked decline in richness and in the Pampean Biotic Index towards the low-lying basin. Principalcomponents analysis associated Site 1 with the dissolved-oxygen concentration, Site 2 with high nitrate values, and Site 3 with oxygen demands. Redundancy analysis indicated a positive relationship between Baetidae and Aeolosomatidae with the dissolved-oxygen concentration and between Enchytraeidae and Stratiomyidae with the conductivity. These marshes are fundamental in maintaining good environmental conditions and attenuating the effects of the flooding that is predicted to become increasingly catastrophic in this region as the climate changes.Keywords: aquatic invertebrates / environmental integrity / biotic index / taxon richness / Argentina Résumé -Les services écosystémiques des marais collatéraux dans les bassins urbains de plaine :propositions pour leur gestion et leur conservation. La ville de La Plata, en Argentine, est située dans une zone alluvionnaire, avec des cours d'eau ayant un écoulement insuffisant dans l'estuaire du Río de la Plata. En avril 2013, un front de tempête exceptionnel a causé des inondations sans précédent dans la ville et dans les environs, qui a entraîné des pertes en vie humaine et en propriétés, en particulier dans le bassin de Del Gato. Grâce à une analyse de la qualité de l'eau et des conditions de l'habitat sur la base des macroinvertébrés présents en tant que bioindicateurs de la qualité de l'environnement, ce travail vise à contribuer à une réévaluation du rôle des marais adjacents à la rivière en tant qu'éléments d'atténuation des inondations et propose ensuite des solutions alternatives pour la gestion des inondations dans le bassin. Simultanément des échantillons saisonniers quantitatifs de végétation, de sédiments et de matières organiques benthiques ont été pris et des paramètres limnologiques mesurés dans trois secteurs du bassin ayant des utilisations de terres différentes : rurales, périurbaines et urbaines-industrielles. Les différences de...

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Low-Tech Alternatives for the Rehabilitation of Aquatic and Riparian Environments

Cited by 6 publications

References 30 publications

Los invertebrados y la calidad del hábitat como indicadores de la condición biológica de la costa del Río de la Plata, Argentina

Los invertebrados y la calidad del hábitat como indicadores de la condición biológica de la costa del Río de la Plata, Argentina

Fostering urban transformations in Latin America: lessons around the ecological management of an urban stream in coproduction with a social movement (Buenos Aires, Argentina)

Ecosystem services of runoff marshes in urban lowland basins: proposals for their management and conservation

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