Diego Lercari

Diego Lercari
Universidad de la República de Uruguay | UdelaR · Faculty of Sciences

Dr.

About

58
Publications
15,655
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1,424
Citations
Citations since 2017
16 Research Items
631 Citations
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120
2017201820192020202120222023020406080100120

Publications

Publications (58)
Article
Full-text available
While fishing discards and bycatch are worrisome for fisheries management, research has been mainly focused on commercial or threatened species, while the ecosystem effects were largely neglected. In this work, the effects of discard and fishing efforts on the structure and the functioning of the food web of the Río de la Plata (RdlP) were analyzed...
Article
Full-text available
A notable diversity of marine mammals inhabits the Atlantic and Pacific waters of South America. For decades, South American countries have been producing scientific research focused on these species. However, still, there is no systematic assessment of the magnitude and main subjects on which this research has been focused. This study analyzes the...
Article
Full-text available
Changes in the structure and dynamics of sandy beach macrofaunal populations result from the simultaneous action of local and regional factors acting synergistically. This is particularly noticeable in transitional interfaces between freshwater and marine ecosystems, where large-scale gradients affect local beach morphodynamics and resident fauna....
Article
Full-text available
Despite the global occurrence of microplastic contamination on sandy beaches, evidence of microplastic distribution within beaches remains contradictory. When conflicting evidence is used to inform sampling surveys, it increases uncertainty in resulting data. Moreover, it hampers spatially explicit risk characterization of microplastic pollution to...
Article
Full-text available
Uruguay has recently expanded its Exclusive Economic Zone (EEZ), having more aquatic sovereignty than terrestrial territories. In this country, various State institutions have carried out the study of marine science for several decades, but their academic development has not been analyzed. The formal evaluation of scientific research represents a c...
Article
As a land-sea interface, the fingerprints of climate perturbations may be immediately and profoundly felt in sandy beaches and the macroinvertebrates they harbour. In particular, extreme climatological events can result in long-lasting or irreversible ecological changes, and therefore, it has become critical to understand how these ecosystems respo...
Article
Full-text available
Uruguay has shown steady economic growth in the past decade (1), which has benefited its citizens but led to environmental degradation such as widespread eutrophication of aquatic ecosystems (2, 3). In 2018, Uruguay’s government passed a law that seems to address these issues but applies unreasonable constraints to scientific research. The law, #19...
Article
Spatial and temporal environmental heterogeneity influences biodiversity distribution patterns and dynamics on sandy beaches. In these ecosystems, the microscale vertical distribution adds a dimension to the analysis of biological and physical processes, whose ecological patterns have been rarely described. An intensive across-shore sampling in a d...
Article
Structural and functional changes in a sandy beach ecosystem in the southwestern Atlantic (Barra del Chuy, Uruguay) were assessed by contrasting four Ecopath trophic models and performing temporal dynamic simulations using Ecosim. Each model (1982, 1989, 1996 and 2012) represents a historical period of a clam fishery in which regulatory structure,...
Article
Sandy beaches are characterised by high temporal and spatial variability, resulting in environmental gradients between beaches based on morphodynamic differences. This variability is less well known when beaches are affected by abrupt and highly energetic perturbations such as earthquakes and tsunamis. Here, we analysed the changes in the morphodyn...
Article
Estuarine transitional waters constitute regions affected by or at risk of anthropogenic impact due to urbanization and industrial development. The elemental composition of the intertidal biofilm sediment is an excellent marker for the detection of any impact, and may exert a bottom-up influence by natural concatenation to higher organization level...
Article
Full-text available
tThe trophodynamics of the Río de la Plata ecosystem over a long time scale (from 1948 to 2008) weresimulated using a food-web model forced by two environmental factors. The Atlantic Meridional Mode(meridional sea surface temperature anomalies) was used as regional forcing, and the Río de la Plata(RdlP) runoff was applied as local forcing. The enti...
Article
Full-text available
Food consumption rates (Q/B) were estimated for 20 fish species of the Río de la Plata and southwest Atlantic Ocean during June 2009, by using empirical models (Model I and II). Differences were found among classes, orders, families, species and habitat use.
Article
Full-text available
The effect of coastal development and tourism occupancy on the structure and trophic networks of sandy beaches was analysed for the first time, using mass-balanced trophic models. Ecopath models were applied to two beaches, representative of different anthropogenic pressures, a beach located inside a protected area and an urbanised beach with touri...
Article
Full-text available
A food web analysis of the Río de la Plata estuary and adjacent shelf ecosystem: trophic structure, biomass flows, and the role of fisheries A food web analysis of the Río de la Plata estuary and adjacent shelf ecosystem: trophic structure, biomass flows, and the role of fisheries Abstract This article performed a comprehensive assessment of the st...
Article
Full-text available
We determined major structural properties influencing the food webs of two sandy beaches with contrasting morphodynamics in the Atlantic coast of Uruguay: reflective (narrow and steep) and dissipative beaches (wide and flat). Furthermore, we evaluated how these characteristics could influence the stability of the local food webs. To this end, we ex...
Article
Full-text available
Environmental gradients and wastewater discharges produce aggregated effects on marine populations, obscuring the detection of human impact. Classical assessment methods do not include environmental effects in toxicity tests designs, which could lead to incorrect conclusions. We proposed a modified Whole Effluent Toxicity test (mWET) that includes...
Article
Full-text available
As top predators, marine mammals and seabirds play an important role in structuring marine ecosystems, and their trophic role have become a major issue. In this study, we quantify the trophic impact of marine mammals and seabirds in the Río de la Plata estuary based on a previous trophic mass balance model of this estuary. The model comprised 37 fu...
Article
Full-text available
Species richness in sandy beaches is strongly affected by concurrent variations in morphodynamics and salinity. However, as in other ecosystems, different groups of species may exhibit contrasting patterns in response to these environmental variables, which would be obscured if only aggregate richness is considered. Deconstructing biodiversity, i.e...
Data
Relationship between species richness discriminated by taxonomic group and salinity range and grain size. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Relationship between species richness discriminated by feeding mode and salinity range and grain size. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Relationship between species richness discriminated by taxonomic group and sand moisture and wave period. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Relationship between species richness discriminated by beach zone occupied and environmental variables. (A) salinity range, (B) grain size, (C) sand moisture and (D) wave period. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Relationship between species richness discriminated by development mode and environmental variables. (A) salinity range, (B) grain size, (C) sand moisture and (D) wave period. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Best models fitted for each deconstruction criterion based on taxonomic affiliation, beach zone occupied, development mode and feeding mode. **p<0.01, ***p<0.001, n.s.: non-significant. (DOC)
Data
Relationship between species richness discriminated by feeding mode and sand moisture and wave period. Beaches are numbered following Figure 1. Statistical details of the models fitted are presented in Table S3. (TIF)
Data
Best models relating species richness of the whole community and environmental variables. ***p<0.001. (DOC)
Data
Fixed effects of the Generalized Linear Mixed Models relating species richness and environmental predictors. Model components are expressed in R language. All terms were significant (p<0.05), with the exception of intercept and poly (Temperature, 2)1. SE: Standard Error. (DOC)
Data
Best models relating abundance of selected species with grain size and salinity. **p<0.01, ***p<0.001. (DOC)
Article
a b s t r a c t Understanding of the intricate interactions of endemic species with anthropogenic impacts of diverse economic interests on ecosystems is of paramount importance to the implementation of effective con-servation programs. A trophic mass-balance model was used to analyze the structural properties of the North and Central Gulf of Califo...
Data
Full-text available
We examined the assimilation of terrestrial organic matter (TOM) by the ovoviviparous isopod Excirolana armata inhabiting an exposed sandy beach of Uruguay. The source of this terrestrial input was an artificial freshwater discharge (the Andreoni Canal). We analyzed carbon (delta C-13) and nitrogen (delta N-15) isotope ratios in the TOM, in seawate...
Article
Full-text available
This paper quantifies the impacts of two invasive species, Rapana venosa (Gastropoda, Muricidae) and Corbicula fluminea (Bivalvia, Corbiculidae), in the food web of the Río de la Plata estuary and adjacent nearshore oceanic ecosystem. We analyzed certain functional traits of these mollusks assessed by a mass balance trophic model previously constru...
Article
The food web structure of two sandy beach ecosystems with contrasting morphodynamics (dissipative vs. reflective) was examined using stable carbon (δ13C) and nitrogen (δ15N) isotope analysis. Organic matter sources (POM: particulate organic matter; SOM: sediment organic matter) and consumers (zooplankton, benthic invertebrates and fishes) were samp...
Article
We model and compare for the first time the ecosystem structure and trophic networks of two sandy beaches with contrasting morphodynamics (i.e. dissipative and reflective). To this end, an Ecopath model was implemented to represent the macroscopic food web on each sandy beach ecosystem. The dissipative beach model comprised 20 compartments and the...
Chapter
Full-text available
Resumen. En este trabajo se muestran los principales resultados obtenidos en el estudio comunitario de playas arenosas protegidas en la Bahía de La Paz, Baja California Sur, México. Para ello se supusieron, en principio, diferencias del ambiente y estructura comunitaria debido a diferencias en el grado de protección de las tres playas estudiadas. A...
Article
Full-text available
1.An ecosystem analysis was developed focusing on resource exploitation and biodiversity conservation for the Northern Gulf of California. The main tools employed were a trophic ecosystem model and time dynamic simulations.2.The ecosystem was represented by an Ecopath model that included 34 functional groups, from primary producers to top predators...
Article
Totoaba macdonaldi is the largest sciaenid fish. It is endemic to the Gulf of California within a protected area and listed as threatened by the IUCN red list. The history of the totoaba fishery begun around 1920 and formally finished in 1975, when an official ban was established as a result of the collapse of the fishery. Several previous studies...
Article
Full-text available
Una gran cantidad de pesquerías a nivel mundial se encuentran sobreexplotadas o colapsadas, en especial las costeras. Esto es de vital importancia, pues la dependencia de los recursos costeros es cada vez mayor. En Uruguay la situación no difi ere de esta realidad, por lo cual son necesarias medidas de manejo pesquero que contemplen un uso sostenib...
Chapter
Full-text available
The Northern Gulf of California is an important Mexican aquatic ecosystem both in terms of biodiversity and also in valuable fishing resources. Two highly endangered, endemic species inhabit the area and three Marine Protected Areas (MPAs) are already implemented. Some conflicts are evident between conservation and exploitation by multi-species and...
Article
Salinity has been identified as a key variable affecting the distribution of aquatic organisms and influencing critical physiological processes. In sandy beach environments, variations in salinity resulting from local freshwater discharges have shown to produce dramatic effects in the habitat and the resident macrofauna. However, macroscale effects...
Article
1.Sandy beaches are subject to a variety of human-induced disturbances. However, very little is known about the consequences of disturbances on macroinfauna inhabiting these systems.2.We evaluate the concepts of taxonomic and functional sufficiency and their potential applicability to cost-effective assessment of environmental impacts on sandy beac...
Article
Among the diverse sources of impact on sandy coasts, man-made freshwater flows and discharges of sewage effluents strongly modify environmental quality by changing salinity and nutrient regimes. However, sandy beaches, which occupy three-quarters of the world's shoreline, have received relatively little attention concerning consequences of this hum...
Article
This paper analyses the spatial and temporal effects of a freshwater discharge (Canal Andreoni) on the macroinfauna community and its habitat in a sandy beach of Uruguay. Bimonthly, we examined 17 environmental variables plus macroinfauna abundance, biomass, richness, evenness and diversity of three sites: Andreoni, at the canal mouth, Coronilla, a...
Article
Full-text available
Exposed marine beaches are physically rigorous habitats in which macrofauna community patterns have been well correlated with physical factors such as grain size, beach slope and wave/swash processes. In this context, the swash exclusion hypothesis (SEH) gained wide acceptability in explaining the control of species abundance and diversity of the s...
Article
Sandy beaches are ecosystems which are heavily affected by human activities. An example of this is freshwater discharges, which are known to change salinity, temperature and nutrient regimes and degrade nearshore environments. However, the effects of this kind of disturbance on sandy beach fauna have been little studied. This paper reports the spat...

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Project
The proposed approach aims to assess the sensitivity of marine and estuarine regional fishing resources in the Southwestern Atlantic Ocean in face of climate-induced changes. Through a flexible, participatory and cost-effective framework based on species traits, we will quantify and categorize ecological sensitivity (Low, Moderate, High, Very High) of key fishing resources. Results are expected to be useful in assisting fishery managers, decision makers and researchers in identifying highly sensitive species and to focus research and management efforts onto species of high concern. Moreover, regional advice on harmed and benefited fishery resources as a result of climate change, could also assist the fishing industry sector to combine a fishing portfolio that embrace climate uncertainty while reducing future risks. Finally, our results will provide foundations for further research and easy-to-understand results for regional mitigation and adaptation responses.