Salvador Sánchez-Carrillo

Salvador Sánchez-Carrillo
The National Museum of Natural Sciences · Biogeochemistry and Microbial Ecology

PhD

About

87
Publications
20,829
Reads
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Introduction
I am a system scientist and aquatic biogeochemist focused on the study of ecosystem functioning in inland waters and their responses to global change. Since my early carrier, most of my research was dedicated to characterize and measure the rates of several biogeochemical processes involved on water, C, N and P cycles at ecosystem-scale, mainly in semi-arid and tropical aquatic ecosystems. My main scientific goals are (1) to determine how interactions between the abiotic and biotic compartments
Additional affiliations
October 2010 - April 2014
Spanish National Research Council
Position
  • Head of Department
July 2007 - November 2014
Spanish National Research Council
Position
  • Senior Research
August 2001 - July 2007
Instituto Tecnológico de Sonora
Position
  • Professor (Full)

Publications

Publications (87)
Preprint
Nitrogen and phosphorous loading drives eutrophication of aquatic systems. Lakes and reservoirs are often effective N and P sinks, but information is needed on the variability of their biogeochemical dynamics, especially for tropical systems. A long-term N and P mass balance (2003-2018) in a small tropical eutrophic reservoir lake, Valle de Bravo (...
Article
The traditional upscaling approach to greenhouse gas (GHG) emission estimates of inland waters is imprecise, but more precise methods based on environmental drivers are a longstanding challenge. Mexico lacks GHG emission estimates for its inland waters, and only sparse but scientifically validated information is available. This study provides the f...
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Physical processes play important roles in controlling eutrophication and oligotrophication. In stratified lakes, internal waves can cause vertical transport of heat and nutrients without breaking the stratification, through boundary mixing events. Such is the case in tropical Valle de Bravo (VB) reservoir lake, where strong diurnal winds drive int...
Preprint
Full-text available
Physical processes play important roles in controlling eutrophication and oligotrophication. In stratified lakes, internal waves can cause vertical transport of heat and nutrients without breaking the stratification, through boundary mixing events. Such is the case in tropical Valle de Bravo (VB) lake, where strong diurnal winds drive internal wave...
Preprint
Full-text available
Physical processes play important roles in controlling eutrophication and oligotrophication. In stratified lakes, internal waves can cause vertical transport of heat and nutrients without breaking the stratification, through boundary mixing events. Such is the case in tropical Valle de Bravo (VB) lake, where strong diurnal winds drive internal wave...
Article
Full-text available
Considerable variability in methane production and emissions has been reported in mangroves, explained by methane inhibition and oxidation. In this study, soil pore waters were collected from mangrove forests located in the Gulf of California (Mexico) exposed to shrimp farm disturbance. The δ13C of dissolved inorganic carbon (DIC) and CH4 were anal...
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Particulate organic carbon (POC) derived from inland water plays an important role in the global carbon (C) cycle; however, the POC dynamic in tropical rivers is poorly known. We assessed the POC concentration, flux, and sources in the Usumacinta, the largest tropical river in North America, to determine the controls on POC export to the Gulf of Me...
Preprint
Physical processes play important roles in controlling eutrophication and oligotrophication. In stratified lakes, internal waves (IW) can cause vertical transport of heat and nutrients without breaking the stratification, through boundary mixing (BM) events. Such is the case in tropical Valle de Bravo (VB) lake, where strong diurnal winds drive IW,...
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Los humedales desaparecen al ritmo que lo hace su biodiversidad. En este trabajo se evalúan las causas del grave declive que la masiega (Cladium mariscus) presenta en el Parque Nacional Las Tablas de Daimiel (PNTD), cuya población ha pasado de ocupar 1100 ha en 1956 a 10 ha en 2019. Para ello, hemos realizado un estudio comparativo en la Reserva de...
Article
In recent years, little scrutiny has been devoted to charophytes with regard to carbon, nitrogen and phosphorus contents, their ratios and the factors controlling them. Data from published literature, and our own unpublished data, will be used along with environmental data to depict overall statistical distributions and controlling factors of charo...
Preprint
Species invasion and habitat degradation very often result in local species loss, which may result in a cascade of secondary extinctions that typically end up disrupting whole ecological netwroks. Herein, we used historical records and the natural abundance of stable isotopes (13C and 15N) of primary producers, aquatic animals and sediment/detritus...
Preprint
Wetlands provide a great variety of environmental services to society, but they are currently globally threatened by human activities. We evaluated the effects of anthropogenic disturbances on the ecological quality of semiarid wetlands from central Spain (La Mancha Húmeda) through the natural abundance of isotopes (13C and 15N) of aquatic plants....
Preprint
Approximately 95% of the total carbon (C) in wetlands is typically found as particulate organic matter (POM). In this study, we evaluated the main C sources of a semiarid floodplain wetland in central Spain under disturbance. For this, we used stable isotopes (13C and 15N) and the Bayesian mixing model SISUS. We show that the allochthonous C derive...
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Experiments employing free-air CO2 enrichment (FACE) facilities have indicated that elevated atmospheric carbon dioxide (eCO2) stimulates growth in diverse terrestrial ecosystems. Studies of the effects of eCO2 on wetland plants have indicated a similar response, but these studies were mostly performed in growth chambers. We conducted a 2-year FACE...
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The effects of the combined roles of abiotic and biotic factors defining foodweb structure are often ignored. In aquatic systems, abiotic variables can regulate food webs through bottom-up effects, but abiotic settings also can have indirect effects on aquatic food webs that are mediated through shifts in the magnitudes of top-down and bottom-up ef...
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Art–science approaches are mounting to increase public literacy about sustainability challenges as planet Earth swiftly moves to an uncertain future. We use data sonification, an approach that allows converting scientific data into music, to document the large-scale transformation of the agricultural sector in central Spain during the 1970s. We con...
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Global change effects, such as warming and increases in nitrogen loading, alter vulnerable Mediterranean aquatic systems, and charophytes can be one of the most affected groups. We addressed the possible interaction between these factors on two populations of the cosmopolitan charophytes Chara hispida and Chara vulgaris. Populations were taken from...
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Plant and community traits provide valuable insights in ecosystem functioning. Yet, such traits are costly to sample. Existing trait data bases give access to species-specific traits and help to reduce the sampling effort and costs. However, many traits show a high intra-specific plasticity due to the variability of environmental conditions, which...
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Research has dealt with coupling of chemical element cycles and feedback in recent years. Sometimes, this biogeochemical coupling is reversed through abiotic or biotic (including man-made) processes. It is then called biogeochemical decoupling and is a disconnection between two chemical elements whereby transformations of one affect cycling of the...
Preprint
Research has dealt with coupling of chemical element cycles and feedback in recent years. Sometimes, this biogeochemical coupling is reversed through abiotic or biotic (including man-made) processes. It is then called biogeochemical decoupling and is a disconnection between two chemical elements whereby transformations of one affect cycling of the...
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The addition of stable isotopes (SI) of ¹³C and ¹⁵N has been used to study several aquatic processes, thus avoiding environmental disturbance by the observer. This approach, employed for the last three decades, has contributed to expanding our knowledge of food-web ecology and nutrient dynamics in aquatic systems. Currently, SI addition is consider...
Chapter
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We assessed the temporal evolution of mangroves health along the Southeastern coast of the Gulf of California (Mexico) through a multi-temporal analysis of Landsat TM images from 1990-2010 where the time series of the Normalized Difference Vegetation Index (NDVI) was obtained. A multivariate regression analysis revealed statistically significant ne...
Article
Nutrient fluxes take place in lakes through different flow paths, and the importance of their nutrient flux changes depend on the biogeochemical processes involved. In flow-Through lakes, the hydrological control of these flux processes appears to be very important, but the significance of other processes is poorly understood. To test this signific...
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Changes induced on freshwater microalga Dictyosphaerium chlorelloides (Dcwt), acclimated in the laboratory until their survival in culture media enriched with cadmium 100 µM, have been studied. Cadmium removal by living cells of this Cd-resistant (DcCdR100) strain was tested in cultures exposed to Cd 100 µM during 30 days. Cell dimensions were meas...
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Most ecological processes can only be understood from a long-time perspective. Ecosystems are changing in such a complex way that we are still trying to identify how and at what rate they are changing according to the complex network of stressors that impinges on them. The existing longterm observations in the LTER-Daimiel node allow us to assess t...
Article
The Free Air CO2 Enrichment (FACE) system has proved suitable for exposing plants to elevated [CO2] with minimal disturbance of their natural environment. Here we describe a FACE facility in a floodplain wetland in detail and, additionally, its performance after the first year of operation (2012). The FACE system consisted of six 3-m diameter emiss...
Chapter
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In wetlands it is still usual to use the same indicators of eutrophication which were developed to study the effects of nutrient enrichment in lakes; however, since hydroecology and biogeochemistry of wetlands is significantly different from lakes, monitoring of these indicators does not allow a good diagnosis of the changes undergone by the wetlan...
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Clonal reproduction of Azolla filiculoides Lam., an aquatic floating fern, native from the American subtropics and a recent invader of Mediterranean wetlands, was assessed experimentally. Shoot fragmentation of the species was quantified under suitable room conditions for optimum growth. Azolla fililculoides showed high longevity, a low mortality perce...
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Ecological systems may occur in alternative states that differ in ecological structures, functions and processes. Resilience is the measure of disturbance an ecological system can absorb before changing states. However, how the intrinsic structures and processes of systems that characterize their states affects their resilience remains unclear. We...
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Growing interest in the effects of global change on the metabolism, stoichiometry and cycling of carbon in aquatic ecosystems has motivated research on the export of organic carbon (OCE) from catchments. In this article, quantitative and functional features of the annual export rates of total, particulate and dissolved organic carbon (TOC, POC and...
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In remote sensing, traditional methodologies for image classification consider the spectral values of a pixel in different image bands. More recently, classification methods have used neighboring pixels to provide more information. In the present study, we used these more advanced techniques to discriminate between mangrove and non-mangrove regions...
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In semi-arid floodplains the average times between floods have been cited to drive metabolic and biogeochemical responses during the subsequent flooding pulse. However, the interaction effects of flood pulse duration and the length of time between floods on the carbon budget are not well understood. Using field experiments, flood pulses—dry cycles...
Chapter
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The traditional perception of wetlands as nutrient sinks has led them to be used as wastewater disposal areas for a long time, resulting in a severe alteration of the structure and function by eutrophication. Nutrient loading is usually linked to hydrological alterations which encompass shifts in vegetation patterns and nutrient cycling. The eutrop...
Article
This study shows results on litterfall dynamics and decay in mangrove stands of Avicennia germinans distributed along a latitudinal gradient (three forest sites) in the Gulf of California, in order to assess whether internal sources could support the observed mangrove ecosystem organic deficit in this arid tropic. Total mean annual litterfall produ...
Article
Thirty five catchments in semiarid Central Spain were monitored monthly in late winter and spring to search for relationships between environmental variables (sedimentary nutrients and hydrological topographical, geological, pedological, land use factors) and nutrient concentrations and exports. Results enabled to outline differences between semiar...
Chapter
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During the last four decades, around 1,500 km2 of dry croplands have been transformed, and are now irrigated in the Upper Guadiana river basin, causing hydrologic overexploitation and wetland desiccation. However, there are no estimations on how anthropogenic stressors have been changing the wetland landscape in the recent past. This chapter focuse...
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Water quality has historically relied upon wetland openness and water availability. For many years until 1986, Las Tablas de Daimiel wetland was enabled to export water and materials downstream, thus diminishing the impairing effects of pollutant storage. Since 1987, when the wetland was dammed, good-quality inputs of low-salinity groundwater were...
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Wetland loss is common worldwide. In Spain, around 90% of the surface covered by floodplain wetlands has disappeared during the last century, and only 32 km2 remain as of today. Las Tablas de Daimiel National Park (20 km2) is unique in Mediterranean Europe. It is the most representative Spanish floodplain wetland nowadays and depicts the core area...
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Hydrology is the key to wetland persistence and conservation. Las Tablas de Daimiel National Park is among the many freshwater wetlands around the world that experienced strong hydrological alterations since the 1970s. Wetland hydrological functioning changed from a groundwater-dependent system to one that is maintained by artificial external water...
Article
Great strides have been made in our understanding of the ecology of a semiarid floodplain wetland, Las Tablas de Daimiel National Park (TDNP). Continuous interdisciplinary and collaborative research efforts during the last decades helped increase our understanding of basic and applied aspects of the wetland’s ecology and biogeochemistry. The main m...
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In this study we compare phytoplankton community similarity between sites in a semiarid floodplain wetland over a 6-year period with variable hydroperiod and connectivity regimes. Phytoplankton communities showed a relatively high site idiosyncrasy during most parts of the study; however, during situations of low connectivity when individual sites...
Article
In this study we evaluated the usefulness of rotifer emergence from dry soils to indicate the environmental status of a remnant temporary pond complex in an agricultural area in central Spain. Because the ponds did not flood during our project, emergence was studied in relation to environmental variables in outdoor microcosms. Redundancy analysis a...
Book
Playing a critical role in both influencing climate change and mitigating its impacts, the world’s diverse wetlands have become one of the world’s most threatened ecosystems as unsustainable land-use practices coupled with irrational use of water have already resulted in large-scale wetlands loss and degradation. To develop sound management and con...
Article
We reviewed global P export and its controlling factors from 685 world rivers. We used available continuous (runoff, rainfall, catchment area, % land use, and population density) and discrete (runoff type, soil type, biome, dominant land use, dominant type of forest, occurrence of stagnant water bodies in catchment, and Gross Product per Capita [GP...
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Understanding landscape correlates of local habitat integrity and community structure and the identification of spatial scales at which these associations operate are relevant for management and conservation of unique but globally threatened temporary ponds. We use a multivariate variance decomposition approach to determine taxon-specific associati...
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Nutrient (C, N and P) fluxes were monitored in a microtidal semi-arid mangrove system, which links a semi-enclosed shallow coastal lagoon with the Gulf of California. We assessed the role of the mangrove ecosystem as a nutrient sink/source and determined how mangrove litterfall rates, tidal regime and climate factors influence these fluxes. Despite...
Article
Despite Spanish wetland richness, many have disappeared in the last century and many others are threatened. Desiccation, eutrophication and pollution, organic matter accumulation, siltation, salinisation and the invasion of exotic species are the most frequent processes affecting Spanish wetlands. We here briefly outline these problems, paying atte...
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The relationship between environmental features and the beta diversity of the propagule bank of dry soils of temporary wetlands has relevance to ecological theories of community structure and to the conservation of wetland biodiversity. The correlation of beta diversity of micro invertebrates and macrophytes derived from propagules in dry soils wit...
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Ecologists increasingly recognise the importance of spatial scale for conservation. This study focuses on threatened temporary wetland crustaceans, the fairy shrimp Branchinecta orientalis Sars (Anostraca) and the tadpole shrimp Triops cancriformis Bosc (Notostraca). Using redundancy analyses with a canonical variance partitioning approach, we stud...
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This study reviews nitrogen export rates from 946 rivers of the world to determine the influence of quantitative (runoff, rainfall, inhabitant density, catchment area, percentage of land use cover, airborne deposition, fertilizer input) and qualitative (dominant type of forest, occurrence of stagnant waterbodies, dominant land use, occurrence of po...
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This study describes the long-term changes of spatial patterns of cut-sedge (Cladium mariscus) and common reed (Phragmites australis) in the Spanish floodplain wetland Las Tablas de Daimiel. Using seven sets of aerial photographs, we determined changes in their spatial patterns (size of patches) between 1945 and 2001 that resulted from combinations...
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During the last century shrimp farming has shown a rapid expansion throughout the world. Despite these farming practices being very important for subsidizing the economy of many developing countries, their environmental impacts should be minimized in order to ensure its long-term sustainability. This is particularly necessary for many countries of...
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Fluxes of nutrients and net metabolism were estimated in coastal lagoon Lobos, a semi-arid subtropical lagoon from Gulf of California, Mexico. Sampling runs were carried out during summer and winter, seawater samples for nutrients were collected in coastal lagoon, offshore and a channel waste-water, physico-chemical parameters were measured in situ...
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Water requirements to supply human needs lead water stakeholders to store more water during surplus periods to fulfil the demand during--not only--scarcity periods. At the reservoirs, mostly those in semi-arid regions, water level then fluctuates extremely between rises and downward during one single year. Besides of water management implications,...