Two novel related Rhizobium species, grahamii sp. nov. and mesoamericanum nov., were identified by a polyphasic approach using DNA–DNA hybridization, whole-genome sequencing phylogenetic phenotypic characterization including nodulation of Leucaena leucocephala Phaseolus vulgaris (bean). As similar bacteria found in the Los Tuxtlas rainforest Mexico Central America, we suggest existence Mesoamerican microbiological corridor. The type strain is CCGE 502 T ( = ATCC BAA-2124 CFN 242 Dal4 HAMBI...

In the last decade, Sargassum spp. seaweed species have caused massive flooding on Caribbean Sea coasts. These a high content of recalcitrant compounds, such as insoluble fibers and polyphenols, which generate low methane yields in anaerobic digestion (AD). This study investigated effect solid–liquid separation biomass biodegradability yield. A biochemical potential (BMP) test was conducted with both fractions raw (RB). mass balance developed to assess distribution components. The obtained...

The tropical earthworm Pontoscolex corethrurus (Rhinodrilidae, Oligochaeta) presents a broad distribution (e.g., 56 countries from four continents). It is generally assumed that temperature appears to limit the success of exotic species in temperate climates. However, range this could advance towards higher elevations (with lower temperatures) where no currently occur. aim study was evaluate soil and climatic variables be closely associated with P. sites along an altitudinal gradient central...

Sargassum spp. flood the Caribbean coastline, causing damage to local economy and environment. Anaerobic digestion (AD) has been proposed as an attractive option for turning macroalgae into valuable resources. a complex composition that affects microbial involved in AD which generates low methane yield. This study aimed improve yield of pelagic Sargassum, using different energy-saving pretreatments identifying community associated with production. We applied algal biomass assessed biomethane...

In recent years much attention has focused on the impacts of agriculture climate change, due to this stage specialists in plant nutrition and soil fertility have achieved task generating adequate fertilization doses for pineapple. A methodology Integrated System Recommending Fertilizer Dose, was used. As a result, seven Thiessen polygons, where rainfall ranged from 1640 2841 mm correlated. Therefore, three major groups were defined classified as subunit level. Likewise, eight fertilizers...

This study quantifies the aboveground C storage of coffee agroecosystems (AESs) present in Xalapa–Coatepec region state Veracruz, one most important producing regions Mexico. We identified and determined spatial distribution five different types AESs. Then, through point-centered quarter method, we measured canopy coverage, total height, diameter at breast height density tree species 160 randomly selected sampling sites. Using allometric models, estimated biomass stored by type AES; finally,...

In Central America, the traditional cropping system milpa de año (summer season) and tornamilpa (winter were compared over 3 yr (2007–2009). Our experimental objectives to measure performance of a maize ( Zea mays L.)–velvet bean [ Mucuna pruriens (L.) DC. subsp. utilis (Wight) Burck] throughout summer winter cultivation, detect any problems associated with velvet use, determine contribution this tropical legume soil fertility productivity. each crop season (separated in space time) we used...

This study investigated the rheological behavior of raw physicochemical sludges and that were digested at different organic loading rates (OLRs) (1, 5, 10 15 gVS L(-1) d(-1)) during methanogenesis suppression to produce hydrogen anaerobically. The Herschel-Bulkley model was used describe rheology these with specific properties. results indicate adequately described (τ0 ≠ 0) this type fluids (R(2) > 0.98). In addition, those OLRs had dilatant behaviors (n 1), which increased increasing OLR....

Propagation of native species in local nurseries is an important activity reforestation and forest restoration programs. A requisite for successful plantation that nursery produced plants are a size quality allows optimal establishment under field conditions. Manipulation edaphic processes through the combined use earthworm Pontoscolex corethrurus, Mucuna pruriens inorganic fertilizers may promote faster biomass gain. This study assessed P. its association with M. (green manure) fertilizers,...

Nest construction is a common form of parental care in soil organisms. However, it unknown whether the tropical earthworm Pontoscolex corethrurus produces nests soils with low nutritional quality habitats. Here we studied reproductive behaviour and nest site selection P. corethrurus, tested hypothesis more cocoons habitats quality. In bidimensional terrariums evaluated combined effect habitat: (Poor Quality Habitat = PQH, Medium MQH, High HQH) depth (Shallow, Intermediate, Deep) factorial...

Objective: The aim of this work was to evaluate the diversity and abundance bark beetles ambrosial their relationship with temperature relative humidity.
 Design/methodology/approach: study carried out in a pine-oak forest northeastern Sierra state Puebla, where monitoring system established using Lindgren traps baited frontalin, brevicomine, alpha-pinene beta-pinene.
 Results: presence 23 species recorded. Gnathotrichus sulcatus (LeConte) Pseudips mexicanus (Hopkins) were most...

The tropical earthworm Pontoscolex corethrurus presents a broad distribution (56 countries from four continents) with climates that resemble the one in its native area of distribution. In invasive earthworms, it is generally assumed temperature appears to limit success exotic species temperate climates. With global climate change, edge range this could advance towards higher elevations (with lower temperatures) where no currently occur. aim study was evaluate soil and climatic variables be...

The presence of earthworm species in crop fields is as old agriculture itself. earthworms Pontoscolex corethrurus (invasive) and Balanteodrilus pearsei (native) are associated with the emergence sedentism region Amazon Maya, respectively. Both have shifted their preference from natural habitat to cropland niche. They contrast terms intensification agricultural land use (anthropic impact symbiotic soil microbiome). P. inhabits conventional agroecosystems, while B. thrives traditional i.e.,...

Abstract In recent years, pelagic Sargassum has invaded the Caribbean coasts, and anaerobic digestion been proposed as a sustainable management option. However, complex composition of these macroalgae acts barrier to microbial degradation, thereby limiting methane production. Microbial adaptation emerged promising strategy improve substrate utilization stress tolerance. This study aimed investigate consortium enhance production from . was carried out for 100 days by progressively feeding The...