scholarly journals The Soil Microbiome of the Laurel Forest in Garajonay National Park (La Gomera, Canary Islands): Comparing Unburned and Burned Habitats after a Wildfire

Forests ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1051 ◽  
Author(s):  
Pablo J. Villadas ◽  
Sara Díaz-Díaz ◽  
Antonio Rodríguez-Rodríguez ◽  
Marcelino del Arco-Aguilar ◽  
Antonio J. Fernández-González ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Canary Islands ◽  
Bacterial Communities ◽  
National Park ◽  
Bacterial Community Composition ◽  
Soil Microbiome ◽  
High Increase ◽  
Laurel Forest ◽  
Species Dominance ◽  
La Gomera

The evergreen laurel forest is a relic of ancient subtropical/tropical forests, of which the best remnant in the Canary Islands is in Garajonay National Park, on La Gomera island. The soil microbiome associated with a mature undisturbed (unburned) laurel forest was characterized at two locations at different topographical positions on the mountain: The slope and the ridge crest. Given the unusual circumstance of an intense wildfire that severely affected part of this forest, the burned soils were also studied. The soil in undisturbed areas was relatively uniform. The bacterial community composition was dominated by bacteria from phyla Proteobacteria, Acidobacteria, and Actinobacteria. The wildfire changed the composition of the bacterial communities. The Acidobacteria, Actinobacteria, and Alphaproteobacteria (dominant class in unburned forests) significantly decreased in burned soils along with a parallel high increase in Betaproteobacteria, Bacteroidetes, and Firmicutes. We further showed the dramatic effect of a wildfire on the soil microbiome of the laurel forest, appearing as a loss of species richness and diversity, species dominance, and changes in the composition of the bacterial communities.

scholarly journals Fog Water Collection in a Subtropical Elfin Laurel Forest of the Garajonay National Park (Canary Islands): A Combined Approach Using Artificial Fog Catchers and a Physically Based Impaction Model

2008 ◽  
Vol 9 (5) ◽  
pp. 920-935 ◽  
Author(s):  
A. Ritter ◽  
C. M. Regalado ◽  
G. Aschan
Keyword(s):  
Canary Islands ◽  
National Park ◽  
Annual Rainfall ◽  
Fog Water ◽  
Laurel Forest ◽  
Combining Data ◽  
Yearly Average ◽  
Water Collection ◽  
Physically Based ◽  
Fog Water Collection

Abstract Fog precipitation has long been assumed as an additional water source in the relic laurel ecosystems of the Canary Islands, located at 500–1400 m MSL. However, to what extent fog water can contribute to the laurel forest water balance is not yet clear. Combining data from artificial fog catchers and a physically based impaction model, the authors evaluated the potential contribution of fog water captured by needle-leafed Erica arborea L. trees in a selected watershed of the Garajonay National Park (La Gomera Island) for a 2-yr period (February 2003–January 2005). Fog water collection was measured with artificial catchers at four micrometeorological stations placed at 1145, 1185, 1230, and 1270 m MSL. Average fog water collection was only significant at the highest measurement site (one order of magnitude greater than at lower altitudes), totaling 496 L m−2 yr−1 during the 2-yr period. The average fog water yield in the first and second annual periods ranged between 0.2–5.0 and 0.1–2.1 L m−2 day−1, respectively. Rainfall exhibited seasonality, distinguishing between rainy and dry seasons, while fog water collection was distributed more evenly throughout the year. Regarding fog water captured by the vegetation, the impaction model predicted a significant amount of fog water potentially collected by a single E. arborea tree, on the order of 1810–2090 L yr−1. Taking tree population density into account, the yearly average water contribution to the soil surface by wind-driven fogs was 251–281 mm, whereas annual rainfall was 635 and 1088 mm, respectively. The hourly course of micrometeorological variables shows a 58% reduction in global radiation under foggy conditions and a concomitant 3°–6°C mean temperature decrease compared to fog-free periods. Thus, limiting evapotranspiration may also be a relevant effect of fog in this subtropical elfin cloud forest.

scholarly journals Soil bacterial community triggered by organic matter inputs supports a high-yielding pear production

2021 ◽  
Author(s):  
Li Wang ◽  
Xiaomei Ye ◽  
Hangwei Hu ◽  
Jing Du ◽  
Yonglan Xi ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Bacterial Community ◽  
Bacterial Communities ◽  
Structural Equation ◽  
Crop Production ◽  
Bacterial Community Composition ◽  
Soil Microbiome ◽  
High Yield ◽  
Common Features

Abstract. The roles of microorganisms in enhancing crop production have been demonstrated for a range of cropping systems. Most studies to date, however, have been confined to a limited number of locations, making it difficult to identify general soil biotic and abiotic characteristics underpinning the yield-promotion across various locations. This knowledge gap limits our capacity to harness soil microbiome to improve crop production. Here we used high-throughput amplicon sequencing to investigate the common features of bacterial community composition, ecological networks and physicochemical properties in six yield-invigorating and adjacent yield-debilitating orchards. We found that yield-invigorating soils exhibited higher contents of organic matter than yield-debilitating soils and harboured unique bacterial communities. Greater alpha diversity and higher relative abundances of Planctomycetes and Chloroflexi were observed in yield-debilitating soils. Co-occurrence network analysis revealed that yield-invigorating soils displayed a greater number of meta-modules and a higher proportion of negative links to positive links. Chloroflexi was recognized as a keystone taxon in manipulating the interaction of bacterial communities in yield-invigorating soils. Structural equation modelling showed that soil organic matter, beta diversity of bacterial community, and network connector (Chloroflexi) were key factors supporting high-yield pear production. Altogether, we provide evidence that yield-invigorating soils across a range of locations appear to share common features, including accumulation of soil organic matter, higher microbial diversity, enrichment of key taxa like Chloroflexi, and maintaining a competitive network. These findings have implications for science-based guidance for sustainable food production.

The role of metals in soils and accumulation in the laurel forest of La Gomera (Canary Islands, Spain): preliminary results

2012 ◽  
Vol 63 (5) ◽  
pp. 674-684 ◽  
Author(s):  
J. L. Mora ◽  
C. D. Arbelo ◽  
A. Rodríguez-Rodríguez ◽  
J. S. Notario ◽  
J. A. Guerra ◽  
...  
Keyword(s):  
Canary Islands ◽  
Laurel Forest ◽  
Preliminary Results ◽  
La Gomera

Partitioning of bacterial communities between travertine depositional facies at Mammoth Hot Springs, Yellowstone National Park, U.S.A.

2003 ◽  
Vol 40 (11) ◽  
pp. 1531-1548 ◽  
Author(s):  
Bruce W Fouke ◽  
George T Bonheyo ◽  
Beth Sanzenbacher ◽  
Jorge Frias-Lopez
Keyword(s):  
Bacterial Community ◽  
Community Composition ◽  
Bacterial Communities ◽  
Yellowstone National Park ◽  
National Park ◽  
Hot Springs ◽  
Bacterial Community Composition ◽  
Drainage System ◽  
Rrna Genes ◽  
Depositional Facies

A culture-independent molecular survey indicates that the composition of bacterial communities is distinctly partitioned between travertine depositional facies in the surface drainage system of Spring AT-1 at Angel Terrace, Mammoth Hot Springs, Yellowstone National Park. PCR (polymerase chain reaction) amplification and sequencing of 16S rRNA genes with universally conserved bacterial primers has identified over 553 unique partial and 104 complete gene sequences (derived from more than 14 000 clones), affiliated with 221 unique species that represent 21 bacterial divisions. These sequences exhibited < 12% similarity in bacterial community composition between each of the travertine depositional facies. This implies that relatively little downstream bacterial transport and colonization took place despite the rapid and continuous flow of spring water from the high-temperature to low-temperature facies. These results suggest that travertine depositional facies, which are independently determined by the physical and chemical conditions of the hot spring drainage system, effectively predict bacterial community composition as well as the morphology and chemistry of travertine precipitation.

scholarly journals Discus (Canaridiscus) laurisilvae sp. nov., a species from the laurel forest of La Gomera, Canary Islands (Gastropoda: Pulmonata: Discidae)

Zootaxa ◽  
2012 ◽  
Vol 3224 (1) ◽  
pp. 62
Author(s):  
CHRISTOPH ALLGAIER ◽  
MATTHIAS KLEMM
Keyword(s):  
Canary Islands ◽  
Land Snail ◽  
Shell Morphology ◽  
Snail Species ◽  
Laurel Forest ◽  
The Family ◽  
La Gomera

A new endemic land snail species of the family Discidae, Atlantica (Canaridiscus) saproxylophaga Alonso, G. Holyoak & Yanes 2011, was recently described from La Gomera, Canary Islands (in Yanes et al. 2011). According to Rähle & Allgaier (2011) it is provisorily considered as belonging to the genus Discus. This species lives in the laurel forest and has the largest shell of all the Discidae hitherto known from Macaronesia. In the same habitat where D. saproxylophagus lives, we found individuals of similar size belonging to a second species of the taxon Canaridiscus. These two species show clear differences with respect to both shell morphology and genital anatomy, as described herein.

scholarly journals Water dynamics in a laurel montane cloud forest in the Garajonay National Park (Canary Islands, Spain)

2004 ◽  
Vol 8 (6) ◽  
pp. 1065-1075 ◽  
Author(s):  
G. García-Santos ◽  
M. V. Marzol ◽  
G. Aschan
Keyword(s):  
Water Balance ◽  
Canary Islands ◽  
Sap Flow ◽  
National Park ◽  
Hydrological Cycle ◽  
Potential Evapotranspiration ◽  
Cloud Forest ◽  
Water Dynamics ◽  
Laurel Forest ◽  
Stand Transpiration

Abstract. Field measurements from February 2003 to January 2004 in a humid (but dry in summer) crest heath wood-land (degraded laurel forest) in the National Park of Garajonay, Canary Islands (Spain), were combined to calculate water balance components. The water balance domain is at the surface of the catchment and is controlled by atmospheric processes and vegetation. This study found that annual water income (rainfall plus fog water) was 1440 mm year-1, half of which was occult (or fog) precipitation, while stand transpiration estimated from measurements of sap flow amounted, annually, to 40% of potential evapotranspiration calculated from measurements of meteorological variables. The positive role of crest laurel forests, which transpire less water than is incoming from rain and fog is emphasised. Keywords: laurel forest, fog interception, stand transpiration, sap flow, hydrological cycle

scholarly journals Oromia orahan (Curculionidae, Molytinae), a new subterranean species for the Canarian underground biodiversity

2020 ◽  
Vol 35 ◽  
pp. 1-14
Author(s):  
Rafael García ◽  
Carmelo Andújar ◽  
Pedro Oromí ◽  
Heriberto López
Keyword(s):  
New Species ◽  
Canary Islands ◽  
The Other ◽  
Laurel Forest ◽  
Subterranean Species ◽  
La Gomera

A new blind weevil belonging to the genus Oromia Alonso-Zarazaga, 1987 is described, being found in the underground of the laurel forest of La Gomera (Canary Islands). Individuals were mainly collected in a colluvial mesocavernous shallow substratum, besides one specimen collected in the deep humic layer of soil. This new species has clear diagnostic differences from the other Oromia species. The number of taxa in this endemic Canarian genus increases to four species, easily identified using the key provided in this article. New data on other Canarian subterranean weevils are also provided.

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