Juan Alberti
A5085756495- Ecology and Vegetation Dynamics Studies
- Coastal wetland ecosystem dynamics
- Marine and coastal plant biology
- Plant and animal studies
- Rangeland and Wildlife Management
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Crustacean biology and ecology
- Coastal and Marine Dynamics
- Land Use and Ecosystem Services
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Animal Ecology and Behavior Studies
- Rangeland Management and Livestock Ecology
- Wildlife Ecology and Conservation
- Peatlands and Wetlands Ecology
- Soil Carbon and Nitrogen Dynamics
- Ruminant Nutrition and Digestive Physiology
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Environmental and Ecological Studies
- Plant Parasitism and Resistance
- Business, Innovation, and Economy
- Pasture and Agricultural Systems
Institute of Marine and Coastal Research
2016-2025
Consejo Nacional de Investigaciones Científicas y Técnicas
2016-2025
National University of Mar del Plata
2015-2024
Fundación Ciencias Exactas y Naturales
2010-2024
Instituto de Investigacións Mariñas
2014-2023
John Wiley & Sons (United States)
2017
Ecological Society of America
2017
Centro Científico Tecnológico - Tucumán
2009-2011
Centro Científico Tecnológico - San Juan
2010
Climate change is increasing the frequency and severity of short-term (~1 y) drought events—the most common duration drought—globally. Yet impact this intensification on ecosystem functioning remains poorly resolved. This due in part to widely disparate approaches ecologists have employed study drought, variation studied, differences among ecosystems vegetation, edaphic climatic attributes that can mediate impacts. To overcome these problems better identify factors modulate responses, we...
Abstract Eutrophication is a widespread environmental change that usually reduces the stabilizing effect of plant diversity on productivity in local communities. Whether this scale dependent remains to be elucidated. Here, we determine relationship between and temporal stability for 243 communities from 42 grasslands across globe quantify chronic fertilization these relationships. Unfertilized with more species exhibit greater asynchronous dynamics among response natural fluctuations,...
Abstract Human activities are enriching many of Earth’s ecosystems with biologically limiting mineral nutrients such as nitrogen (N) and phosphorus (P). In grasslands, this enrichment generally reduces plant diversity increases productivity. The widely demonstrated positive effect on productivity suggests a potential negative feedback, whereby nutrient‐induced declines in reduce the initial gains arising from nutrient enrichment. addition, can be inhibited by accumulations dead biomass,...
Abstract Plant productivity varies due to environmental heterogeneity, and theory suggests that plant diversity can reduce this variation. While there is strong evidence of effects on temporal variability productivity, whether mechanism extends across space remains elusive. Here we determine the relationship between spatial in 83 grasslands, quantify effect experimentally increased heterogeneity conditions relationship. We found communities with higher species richness (alpha gamma...
Invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. However, global-scale tests this assumption been elusive because focus on exotic richness, rather than relative abundance. This is problematic low invader richness can indicate invasion resistance by community or, alternatively, dominance a single species. Here, we used globally replicated study quantify relationships between and abundance in grass-dominated ecosystems 13...
Abstract Reductions in community evenness can lead to local extinctions as dominant species exclude subordinate species; however, herbivores prevent competitive exclusion by consuming otherwise plant species, thus increasing evenness. While these predictions logically result from chronic, gradual reductions evenness, rapid, temporary pulses of dominance may also reduce richness. Short occur biotic or abiotic conditions temporarily favour one a few manifested increased temporal variability...
Nutrients and herbivores are well-known drivers of grassland diversity stability in local communities. However, whether they interact to impact the aboveground biomass these effects depend on spatial scales remain unknown. It is also unclear nutrients via different facets plant including species richness, evenness, changes community composition through time space. We used a replicated experiment adding excluding for 5 years 34 global grasslands explore questions. found that both nutrient...
Abstract Eutrophication usually impacts grassland biodiversity, community composition, and biomass production, but its impact on the stability of these aspects is unclear. One challenge that has many facets can be tightly correlated (low dimensionality) or highly disparate (high dimensionality). Using standardized experiments in 55 sites from a globally distributed experiment (NutNet), we quantify effects nutrient addition five (temporal invariability, resistance during dry wet growing...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 293:155-164 (2005) - doi:10.3354/meps293155 Impact of burrowing crabs on C and N sources, control, transformations in sediments andfood webs SW Atlantic estuaries Florencia Botto1,*, Ivan Valiela2, Oscar Iribarne1, Paulina Martinetto1,2, Juan Alberti1 1Departamento de Biología, Universidad Nacional Mar del...
Interactions among plants have been hypothesized to be context dependent, shifting between facilitative and competitive in response variation physical biological stresses. This hypothesis has supported by studies of the importance positive negative interactions along abiotic stress gradients (e.g., salinity, desiccation), but few tested how biotic stresses can mediate nature strength plant interactions. We examined that herbivory regulates during succession Argentinean marshes dominated...
Summary Arbuscular mycorrhizal fungi (AMF) can affect nutrient uptake of associated plants and vary in function from mutualism to parasitism as availability increases; thus they may interact with influence plant community structure. We experimentally investigated the hypotheses that AMF structure salt marshes by affecting competitive ability. focused on: Spartina densiflora , dominates physically benign high marsh habitats S. alterniflora which more stressful low habitats. Colonization...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 349:235-243 (2007) - DOI: https://doi.org/10.3354/meps07089 Local and geographic variation in grazing intensity by herbivorous crabs SW Atlantic salt marshes Juan Alberti1,2,*, Mauricio Escapa1,2,3, Pedro Daleo1,2, Oscar Iribarne1,2, Brian R. Silliman4, Mark Bertness5 1Departamento de Biología (FCEyN),...
Coastal vegetation plays an important role for climate change mitigation. Compared with terrestrial ecosystems, coastal shows higher rates of atmospheric CO2 uptake and a more efficient retention carbon (C) in sediments. Salt marshes present the highest values as C binders, although global estimation these is still pending due to regional gaps records predominantly from southern hemisphere. There are no clear patterns or dominant processes enough evidence account observed variability,...
Environmental change can result in substantial shifts community composition. The associated immigration and extinction events are likely constrained by the spatial distribution of species. Still, studies on environmental typically quantify biotic responses at single (time series within a plot) or temporal (spatial beta diversity time points) scales, ignoring their potential interdependence. Here, we use data from global network grassland experiments to determine how turnover two major forms...
Microbial processing of aggregate-unprotected organic matter inputs is key for soil fertility, long-term ecosystem carbon and nutrient sequestration sustainable agriculture. We investigated the effects adding multiple nutrients (nitrogen, phosphorus potassium plus nine essential macro- micro-nutrients) on decomposition biochemical transformation standard plant materials buried in 21 grasslands from four continents. Addition weakly but consistently increased remains during peak-season,...
Anthropogenic nitrogen (N) input is known to alter the soil microbiome, but how N enrichment influences abundance, alpha-diversity and community structure of N-cycling functional microbial communities in grasslands remains poorly understood. Here, we collected soils from plant subjected up 9 years annual N-addition (10 g m−2 per year using urea as a N-source) unfertilized plots (control) 30 worldwide spanning large range climatic conditions. We focused on three key groups responsible for two...
Coastal vegetated ecosystems are acknowledged for their capacity to sequester organic carbon (OC), known as blue C. Yet, C global accounting is incomplete, with major gaps in southern hemisphere data. It also shows a large variability suggesting that the interaction between environmental and biological drivers important at local scale. In southwest Atlantic salt marshes, account space occupied by crab burrows, it key avoid overestimates. Here we found marshes store on average 42.43 (SE =...
1 While great effort has been made in documenting the processes that drive plant-induced susceptibility after herbivore attack and it is widely accepted herbivores can facilitate plant diseases, relative importance of this interaction controlling growth natural systems remains largely unexplored. 2 In south-western Atlantic salt marshes, we investigated disease herbivory by examining: (i) whether or not a herbivorous crab facilitates (i.e. fungus infection) marsh plants (Spartina...