Francisco J. Díaz Peña

Francisco J. Díaz Peña
Universidad de La Laguna | ULL · Animal Biology, Soil Science and Geology

About

70
Publications
13,950
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1,184
Citations
Citations since 2017
34 Research Items
734 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Introduction

Publications

Publications (70)
Article
Soils play a very important role in ecosystems sustainability, either natural or agricultural ones, serving as an essential support for living organisms of different kinds. However, in the current context of extremely high plastic pollution, soils are highly threatened. Plastics can change the chemical and physical properties of the soils and may a...
Poster
Full-text available
Plastic debris and garbage are the cause of the death of thousands of birds through ingestion, poisoning, starvation or entangled, being the marine species the most affected with this problem (Beaumont et al., 2019). Recently, several research and articles show a growth of bird species that use plastic waste to make their nests (Thompson et al., 2...
Article
Full-text available
Around one million metric ton of plastics is produced worldwide daily. Plastic contamination is aggravated when the particles reach sizes between 5 mm and 1 μm, giving rise to microplastics, which are omnipresent in the environment, especially in agroecosystems. To appreciate the magnitude of this problem, this review analyzes 177 scientific works...
Article
Full-text available
Microplastic pollution has an extremely widespread distribution, to the extent that microplastics could be ingested by aquatic organisms, including species of commercial importance for fisheries and aquaculture. In this work, the anthropogenic particles content of the gastrointestinal tracts of 86 individuals of cultivated European sea bass (Dicent...
Article
Full-text available
Oil residues have been frequently found on the coasts all over the world as a result of different accidental releases. Their partial evaporation and solidification onto the coastal rocks can produce the formation of a new solid structure forming an agglomerate with other materials, mainly microplastics (though wood, glass, sand and rocks were also...
Article
Full-text available
In this work, the occurrence of microplastics (MPs) in irrigation recycled wastewaters (RWWs) and a desalinated brackish water (DBW) from the arid territory of Fuerteventura (Canary Islands, Spain) was studied. Besides, the presence of MPs in two types of soils (sandy-loam and clay-loamy; with no mulch film or fertilization with sewage sludge appli...
Article
Sea urchins are highly abundant in the marine ecosystem where they graze limiting algal biomass and also serving as food for other predators. In this work, the presence of microplastics in the digestive tracts and gonads of 33 Diadema africanum sea urchins collected at two sampling points in Tenerife (Canary Islands, Spain) was studied. After separ...
Article
In this work, the microplastic content of sediments collected in July 2020 between 5 and 7 m depth was studied in four locations of La Palma island (Canary Islands, Spain). At each sampling location, three samples were taken parallel to the shoreline. The microplastic content in each sampling corer was studied every 2.5 cm depth after digestion wit...
Article
The present work has studied the incidence and type of micro (1–5 mm), meso (5–25 mm) and macroplastics (>25 mm) that have reached Arenas Blancas beach, located in the north coast of El Hierro island, in the Canary Islands (Spain), from October 2019 to May 2020 (13 sampling dates with 3 sampling points each). Taking into consideration the three stu...
Article
Spartocytisus supranubius (Teide broom) is the dominant legume of the high-mountain ecosystem in Teide National Park (Tenerife, Canary Islands). Herbivory by rabbits is one important cause of its declining populations. Biological nitrogen-fixing of rhizobia in symbiosis with S. supranubius is hypothesized to be the main nitrogen (N) input in this a...
Article
Unconventional water resources such as treated wastewater (TWW) are being increasingly used for irrigation in regions with limited freshwater availability. Likewise, subsurface drip irrigation (SSDI) has been proposed for improving water use efficiency in arid lands. The combined effects of both factors (SSDI/TWW) on soil health have received littl...
Poster
Microplastics are widely recognised as contaminants of emerging concern. In the marine environment, seabed sediments have been identi�ed as a major sink with a high potential to accumulate them [1]. Among microplastic forms, micro�bres appear among the most frequently reported in the environmental compartment [2]. The aim of this study was to quant...
Article
Full-text available
AimsThe potential of “biosaline agriculture” relies on easy-to-apply tools to select plant genotypes that are best adapted to saline conditions. We aimed to determine the effects of salinity-sodicity on the functional response of alfalfa varieties by evaluating instantaneous vs integrated plant-based measurements for the selection of alfalfa cultiv...
Article
The use of freshwater in agricultural systems represents a high percentage of total water consumption worldwide. Therefore, alternative sources of water for irrigation will need to be developed, particularly in arid and semi-arid areas, in order to meet the growing demand for food in the future. The use of recycled wastewater (RWW), brackish water...
Article
Full-text available
Food security concerns, climate change impacts, and increased pressure on conventional water resources have encouraged the agricultural use of nonconventional water resources in the last decade. As a result, desalinated seawater (DSW) has already consolidated its position as an alternative source to increase the supply for crop irrigation in Spain...
Article
Full-text available
The growing need for alternative water resources for irrigation has led to advanced technological developments, which are addressing some of the challenges that our planet is facing regarding the water supply. The Canary Islands Archipelago (Spain) is a singular territory with several years of desalination experience while using desalinated seawate...
Article
Intensive use of agrochemicals is considered one of the major threats for soil quality. In an attempt to mitigate their side-effects on non-target organisms and soil functioning, many engineering and biological remediation methodologies are currently available. Among them, the use of biochar, a carbonaceous material produced from pyrolysing biomass...
Article
Introduction Saline groundwater desalination has recently emerged as an alternative source of irrigation water in arid and semiarid regions due to the gradual reduction in the quantity and quality of conventional water resources for agricultural use. In Fuerteventura Island (Spain), an extremely arid territory in the European Union, brackish water...
Article
Full-text available
Species monitoring is a valuable tool that can be used to answer a wide range of questions directly related to species conservation, management, and population improvement. We monitored the only remaining population of Lotus kunkelii on a monthly basis over 3 years to reveal important characteristics of the population that could help protect it. In...
Article
The gradual increase in the amount of land and water resources affected by salt in arid and semi-arid regions requires strategies to optimize the use of these marginal-quality resources. Recent field and greenhouse experiments have demonstrated the potential of growing certain ‘pre-selected’ varieties of alfalfa in highly saline conditions. A green...
Article
Full-text available
We studied the effect of salinity on Sarcocornia neei seed germination from two contrasting habitats under controlled conditions in a laboratory experiment. Test solutions were made with distilled water adding NaCl to obtain the equivalent to 0, 25, 50, 75, 100 and 125% of sea water salinity. Germination was significantly different among habitats....
Article
Full-text available
This paper discusses the assessment of various biofuel crop production alternatives on the island of Fuerteventura using Jatropha crops. It adopts an integrated approach by carrying out a multi-criteria assessment with the support of participatory techniques and geographical information systems. Sixteen production alternatives were analyzed for gro...
Article
Full-text available
The nature of governance issues (complex and uncertain world, lack of information, need of bear in mind qualitative and quantitative information, participation of different actors in the decision making processes, etc.) imply that there is no a unique solution. On the contrary, there are different alternatives strategies, which lead the social syst...
Article
In a global context in which obtaining new energy sources is of paramount importance, the production of biodiesel from plant crops is a potentially viable alternative to the use of fossil fuels. Among the species used to produce the raw material for biodiesel, Jatropha curcas L. (JCL) has enjoyed increased popularity in recent years, due partly to...
Article
Full-text available
In a global context in which obtaining new energy sources is of paramount importance, the production of biodiesel from plant crops is a potentially viable alternative to the use of fossil fuels. Among the species used to produce the raw material for biodiesel, Jatropha curcas L. (JCL) has enjoyed increased popularity in recent years, due partly to...
Article
In situ grab sampling from source waters and water extraction from source materials are common methods for determining disinfection by-product (DBP) formation potential (FP) of water samples or reactivity of dissolved organic matter (DOM) in forming DBPs during chlorination. However, DOM, as the main DBP precursor, collected using these techniques...
Article
Halophytes have been considered as potential crops for the reuse of saline drainage water (DW) in the western portion of California's San Joaquin Valley. This management strategy can reduce drainage volumes through plant water consumption and concentrate salts and other contaminants prior to discharge of the final effluent into a solar evaporator....
Article
Full-text available
Several agricultural non-point source pollutants impair water quality in the Sacramento-San Joaquin River system of California's Central Valley. Constructed wetlands are a water management option available to growers in this region to economically reduce pollutants in agricultural runoff. This study assessed the efficacy of using constructed wetlan...
Article
In the extremely arid (∼150mmyr−1) eastern Canary Islands of Lanzarote, Fuerteventura and La Graciosa, agriculture has been sustained for decades by a traditional runoff-capture (RC) farming system known as “gavias”. Although the main goal of these systems is to increase water supply for crops, making unnecessary conventional irrigation, a secondar...
Article
Litter materials from forested watersheds can be a significant source of dissolved organic matter (DOM) to surface waters that can contribute to the formation of carcinogenic disinfection by-products (DBPs) during drinking-water chlorination. This study characterized the reactivity of DOM from litter leachates of representative vegetation in oak wo...
Article
On the island of Lanzarote, under extreme conditions of aridity and water scarcity, a certain amount of rainfed agriculture has been possible due to the use of tephra mulching, a system known locally as arenados, which is a very effective water and soil conservation system. The natural arenados are associated to already present tephra from recent v...
Article
Full-text available
Water quality degradation from bacterial pathogens is one of the leading causes of surface water impairment in California agricultural watersheds. In the San Joaquin Valley, approximately 50 and 100% of water samples collected from three different irrigation return flows exceeded the Escherichia coli standard of 126Â cfu 100Â mL-1 and the enterococ...
Article
Hydrothermal alteration is an important soil forming factor in the vicinity of active volcanic centers, yet we are aware of no studies that have addressed the role of active fumaroles on soil development. This paper examines a soil developmental sequence of five pedons established across a thermal gradient (∼ 100 m) induced by an active fumarole in...
Article
Full-text available
Tall wheatgrass (Thinopyrum ponticum, cv. ‘Jose’) (TWG) has been identified as a salt-tolerant forage that has acceptable nutritional value and shows considerable promise for reducing saline drainage volumes in California's San Joaquin Valley (SJV). The SJV drainage water also contains high concentrations of boron (B), selenium (Se) and molybdenum...
Article
Full-text available
The effects of wetland treatment on disinfection byproduct precursors were evaluated for six constructed wetlands receiving agricultural return flows in the Central Valley of California. Wetlands varied in size, age, vegetation, hydrologic residence time (0.9-20 days) and water management (continuous flow vs. flood pulse). The effects of wetland tr...
Article
Full-text available
Reuse of drainage water (DW) for irrigation reduces the volume of DW requiring treatment or disposal. We conducted a greenhouse study to evaluate the performance of the halophyte Salicornia bigelovii Torr. when irrigated with hyper-saline DW and seawater (SW) treatments, ranging from 1/3 strength to full strength (18-49 dS m(-1)), in a sand-culture...
Article
The effects of a restored wetland system in the Sacramento Valley, California on the production of dissolved organic carbon (DOC) and nitrogen (DON) and the formation potential of common disinfection byproducts (DBPs: trihalomethanes, haloacetonitriles, and chloral hydrate) were examined. Additionally, the effects of photodegradation and microbial...
Article
Full-text available
'Jose' tall wheatgrass was found to be extremely tolerant to boron even though some tissue samples exceeded 2,000 mg/kg dry weight. There was no significant salinity-boron interaction as found in other crops. Some mineral concerns related to ruminant nutrition are discussed.
Article
The scarcity of water in arid regions promotes natural soil salinization processes, which limit soil productivity, cause degradation and contribute to desertification. Human activity can speed up these processes although it can also help reduce their effects and even rehabilitate affected soils. A number of traditional soil water conservation syste...
Article
The volcanic island of Lanzarote (Canary Islands, Spain) is one of the most arid parts of the European Union. During the eruptions of 1730–36, a third of the island was covered with lava and pyroclastic material. In areas under basaltic tephra, an agrosystem has been developed that allows a form of dry farming that has become a key component of the...
Article
In the extremely arid island of Fuerteventura (Canary Islands, Spain), a traditional water harvesting practice has evolved in slightly sloping areas, which receive runoff water from time to time. The system is particularly effective in the rehabilitation of saline–sodic soils where the improved fertility allows certain crops to be grown, which woul...
Article
On the island of Lanzarote (Canary Islands, Spain), under extremely arid conditions – including annual rainfall of below 150 mm – a system for dry farming has evolved based on the use of volcanic mulch. This paper presents the results of the laboratory experiments conducted to assess the influence of two parameters of the mulch – thickness and grai...
Article
Full-text available
Dryland farming on Fuerteventura and Lanzarote (Canary Islands, Spain), which has an annual rainfall of less than 150 mm/year, has been based traditionally on water harvesting techniques (known locally as “gavias”). Periods of high productivity alternate with those of very low yield. The systems are sustainable in that they reduce erosive processes...
Article
The arid climate of some zones of the Canary Islands (Spain) requires the use of traditional farming practices for soil and water conservation, including the use of sand mulch. Results from field studies and laboratory experiments showed that soil moisture loss due to evaporation in mulched soils was reduced by 76 percent and the water content was...
Article
Natural soil salinization and sodication processes that restrict or prevent crop growth are commonplace in arid regions. In saline-sodic soils of arid parts of the Canarian archipelago, where annual rainfall is <150 mm, a traditional agriculture system has been developed using basaltic tephra mulch. This system has enabled dry crop farming to take...
Article
Soil moisture regime is considered a diagnostic criterion in various soil classifications, and in some -for example, Soil Taxonomy-, is used to define high taxonomic levels. In many cases, the absence of direct field measurements means that meteorological data have to be used. This can lead moisture regimes to be defined that do not coincide with s...
Article
Large areas of the Canarian archipelago are catalogued as aridic according to U.S. soil taxonomy. A traditional system of cultivation, based on the application of a mulch layer of tephra, is widely practiced. The objective of this work is to compare the classification of soils with and without mulch using U. S. soil taxonomy, and illustrate the pro...
Article
Large areas of the Canarian archipelago are catalogued as aridic according to U.S. soil taxonomy. A traditional system of cultivation, based on the application of a mulch layer of tephra, is widely practiced. The objective of this work is to compare the classification of soils with and without mulch using U. S. soil taxonomy, and illustrate the pro...
Article
Few references exist with respect to the fertility of rock-covered soils. On the island of Lanzarote (Canary Islands, Spain) a dry farming system has been developed in very arid conditions on land artificially covered with tephra. For the present work, three sites were selected and the soil fertility status of the soils under the tephra was compare...

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Projects

Projects (3)
Project
Biochar (solid by-product obtained by pyrolysis of biomass in oxygen-free atmosphere) currently represents an attractive form of circular economy (renewable biological resources to produce food, materials and energy). This carbonaceous material provides multiple environmental applications such as improvement of soil productivity, remediation of contaminated soils, or reduction of greenhouse gas emissions. However, the benefits associated with the application of biochar to soil largely depend on its physicochemical and structural properties, which in turn are the reflection of the type of raw material and pyrolysis conditions. Currently, chemical treatment of biochar is the most used strategy for increasing its efficiency in bioremediation. However, this type of activation presents undesirable collateral effects such as high cost and/or the release of toxic chemicals. The PlatWorm project aims to obtain a value-added biochar produced by co-pyrolyzing biomass with plastic waste (plastic mulch films), amenable to be bioactivated in field. The inclusion of plastics pursues the chemical modification of biochar surface to facilitate the adsorption of extracellular enzyme by using earthworms. The specific objectives of the project are: 1) to select the upgraded biochar with greater capacity to stimulate microbial and enzymatic activities and, at the same time, harmless to earthworms; 2) to validate the in situ bioactivation of upgraded biochar co-applied with earthworms. The benefits of bioactivating biochar will be assessed in terms of its ability to mitigate soil contamination by pesticides. The results of the project may represent a significant innovation in biochar technology for the recovery of degraded soils, beyond an attractive strategy to the management of plastic waste generated in agriculture.