This dataset contains Beryllium isotope data, pH measurements, and calculations of surface process rates (denudation, weathering, erosion) from soil and drill core samples from the Coastal Cordillera, Chile. All drilling and soil sampling campaigns were conducted in the framework of the “EarthShape” project (DFG SPP1803) from March 2019 to March 2020. Rock and soil samples consist of granitoid lithology that is weathered to different degrees. We measured the concentration of in situ 10Be in quartz samples from soil samples and calculated denudation rates thereof. Furthermore, we applied a sequential extraction method to analyse meteoric 10Be and reactive 9Be; we also measured residual 9Be and parent bedrock 9Be concentrations. Using the concentration of meteoric 10Be, we calculated the inventory assuming exponential decrease with depth. Finally, we calculated the depositional flux using the in situ 10Be denudation rate and the 10Be(meteoric)/9Be isotope ratio. From reactive 9Be, we calculated the fraction of reactive and dissolved 9Be that we interpret as weathering indicator. All samples are indicated with a IGSN (International Generic Sample Number) which is a global unique sample identifier. These IGSNs are provided in the data tables and are linked to a short data description in the internet.
This data publication presents quantitative DNA data obtained through fluorometric detection of genomic DNA and the estimation of 16S rRNA gene copies using quantitative Polymerase Chain Reaction (qPCR). The data encompasses various soil and rock samples collected across a climate gradient. The DNA was extracted using a protocol enabling the separate analysis of intracellular DNA (iDNA) and extracellular DNA (eDNA) from the same sample. The primary objective of this study was to enhance a previously established method developed by Alawi et al. (2014) for analyzing terrestrial samples by introducing modifications to the extraction buffer. Phosphate buffers at two different concentrations (120 mM and 300 mM), EDTA (300 mM), and a high-concentration phosphate buffer in combination with EDTA (300 mM each) were tested in conjunction with a detergent mix (detailed in Medina et al., 2023; submitted). Thorough tests, including spiked DNA experiments and cell counts, were conducted on one low biomass sample to validate the extraction setups. The two most effective extraction protocols were then applied to all samples from the four designated sites and compared with the phosphate buffer described by Alawi et al. (2014), resulting in the calculation of improvement factors. The resulting dataset provides valuable quantitative DNA information and estimates of 16S rRNA gene copies across diverse soil and rock samples along a climate gradient. The modifications made to the extraction buffer demonstrated improved efficiency in extracting especially iDNA compared to the original method. These findings contribute to the refinement and optimization of DNA extraction protocols for terrestrial samples, enabling more accurate and comprehensive analyses of microbial communities in different environments.
The data consists of four vascular plant species lists, one per study site. The site selection is based on the four study areas of the DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota” (www.earthshape.net), namely: arid climate National Park Pan de Azúcar, semi-arid climate Private Reserve Santa Gracia, mediterranean climate National Park La Campana and humid-temperate climate National Park Nahuelbuta in Chile, South America. Each list is a table with (mostly) terrestrial vascular plant species names that have been reported in a variety of sources at the selected sites and the corresponding administrative or biogeographical regions of Chile. The available literature sources varied from specific national park flora lists to Chilean flora books and catalogues and thus, the present lists represent a potential vegetation for the EarthShape study areas. Each table includes the plants’ Latin name, clade taxonomy, the plant growth form as well as the origin. The taxonomy of the vegetation species was updated to the taxonomic information available up to August 2023 from Chilean and South American vascular flora lists.
The DFG Priority Program 1803 “EarthShape” (www.earthshape.net) investigates Earth surface shaping by biota. As part of this project, we present Light Detection and Ranging (LiDAR) data of land surface areas for the four core research sites of the project. The research sites are located along a latitudinal gradient between ~26 °S and ~38 °S in the Chilean Coastal Cordillera. From north to south, the names of these sites are: National Park Pan de Azúcar; Private Reserve Santa Gracia; National Park La Campana; and National Park Nahuelbuta. The three datasets contain raw 3D point cloud data captured from an airborne LiDAR system, and the following derivative products: a) digital terrain models (DTM, sometimes also referred to as DEM [digital elevation model]) which are (2.5D) raster datasets created by rendering only the LiDAR returns which are assumed to be ground/bare-earth returns and b) digital surface models (DSM) which are also 2.5D raster datasets produced by rendering all the returns from the top of the Earth’s surface, including all objects and structures (e.g. buildings and vegetation). The LiDAR data were acquired in 2008 (southernmost Nahuelbuta [NAB] catchment), 2016 (central La Campana [LC] catchment) and 2020 (central Santa Gracia [SGA] catchment). Except for Nahuelbuta (data already was available from the data provider from a previous project), the flights were carried out as part of the "EarthShape" project. The LiDAR raw data (point cloud/ *.las files) were compressed, merged (as *.laz files) and projected using UTM 19 S (UTM 18 S for the southernmost Nahuelbuta catchment, respectively) and WGS84 as coordinate reference system. A complementary fourth dataset for the northernmost site in the National Park Pan de Azúcar, derived from Uncrewed Aerial Vehicle (UAV) flights and Structure from Motion (SfM) photogrammetry, is expected to be obtained during the first half of 2022 and will be added to the above data set.
This data publication contains new and recalculated soil production, chemical weathering, and physical erosion rates for granitoid soil-mantled hillslopes in the Chilean Coastal Cordillera. For further comparison and data discussion the data publication presents global rates from granitoid soil-mantled hillslopes combined with a suite of parameters at the sample location (e.g., slope, precipitation, temperature, vegetation cover). The data were collected within the DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota". The data publication contains one excel table including tables S1 to S9. In addition, these nine sub-tables are available as txt files in a zip-file. They are supplementary material to Schaller et al. (2021).
The DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota” (www.earthshape.net, short description of the project below) installed a meteorological station network consisting of four stations between ~26 °S to ~38 °S in the Coastal Cordillera of Chile, South America. The stations are intended to provide baseline meteorological data along the climate and ecological gradient investigated in the EarthShape program. The stations are located in the EarthShape study areas, encompassing desert, semi-desert, mediterranean, and temperate climate zones. Each station is configured to include sensors that record precipitation at ground level, radiation at 2.8 m height, wind at 3 m height, 25 cm depth soil temperature, soil water content and bulk electrical conductivity, 2 m air temperature and relative humidity, and barometric pressure at 30-minute intervals. The data recording started in March/April 2016. The EarthShape project runs until December 2021. Data collection will continue until that date, and potentially longer depending on available funds. This publication provides two sets of data: raw data and processed data. The raw data contains 2 file types per meteorological station: (1) all measured parameters of the whole dataset measured in 30 minutes intervals as downloaded from the station. Furthermore, we provide (2) one table per station of high-resolution precipitation events, measured in 5 min. intervals that were triggered during rain events at each station. The processed data consists of a continuous timeseries of observations since the activation of each station. The processing consists of the exclusion of erroneous data, caused by maintenance of the weather-stations and sporadic malfunction of sensors detected during data screening. The excluded data is communicated in a logfile (excel table), comments from data screening, solar eclipse and others are summarized in history files (ASCII ). the full description of the data and methods is provided in the data description file (Data description file).
We compiled available information for burrowing animals in Chile in two tables: "2020-042_Uebernickel-et-al_Vertebrates" and "2020-042_Uebernickel-et-al_Invertebrates". A discussion about burrowing vertebrates and invertebrates and the effect of the communities at selected sites in arid to humid Chile is given in Übernickel et al. (in review): Quantification of animal burrowing volumes on hillslopes along a climate gradient, Chile. The purpose of these tables is to provide an overview of burrowing vertebrates and invertebrate species in Chile. The degree of known details of their natural history varies and is often minimal. For invertebrates, the majority of the published work is taxonomic or descriptive that hardly encounter biologic or ecologic aspects of the respective species. The geographic distribution of most invertebrate species remains largely unknown, as they have been topic of single investigations at specific research sites in Chile. The tables are intended as starting point for follow up research. Quantification of distributional ranges, density, excavation rates, burrow or gallery dimensions and further parameters of these species, is important to quantify the biotic influence they have on a landscape level. From publications mostly treating single species, we have compiled this comprehensive dataset of 45 digging or soil-moving vertebrate and 345 invertebrate species. It includes a list of species names with morphological digging adaptations and species observed to dig. In vertebrates excavating behavior is documented for mammals, lizards and birds. In invertebrates, excavating behavior is mentioned for Chilean spiders, scorpions, camel spider, beetles, cicadas, wasps, bees, ants, a termite and antlions. Chile is characterized by an endemic fauna, especially true for arthropods, with limited distributional ranges. Currently, these largely still unknown species are under thread of extinction by the destruction of habitats, desertification and climate change. We encourage specialists to add information to this first compilation.
The Chilean Coastal Cordillera features a spectacular climate and vegetation gradient, ranging from arid and unvegetated areas in the north to humid and forested areas in the south. The DFG Priority Program "EarthShape" (Earth Surface Shaping by Biota) uses this natural gradient to investigate how climate and biological processes shape the Earth's surface. We explored the critical zone, the Earth's uppermost layer, in four key sites located in desert, semidesert, mediterranean, and temperate climate zones of the Coastal Cordillera, with the focus on weathering of granitic rock. Here, we present first results from four ~2m-deep regolith profiles to document: (1) architecture of weathering zone; (2) degree and rate of rock weathering, thus the release of mineral-derived nutrients to the terrestrial ecosystems; (3) denudation rates; and (4) microbial abundances of bacteria and archaea in the saprolite. From north to south, denudation rates from cosmogenic nuclides are ~10 t km-2 yr-1 at the arid Pan de Azúcar site, ~20 t km-2 yr-1 at the semi-arid site of Santa Gracia, ~60 t km-2 yr-1 at the mediterranean climate site of La Campana, and ~30 t km-2 yr-1 at the humid site of Nahuelbuta. A and B horizons increase in thickness and elemental depletion or enrichment increases from north (~26 °S) to south (~38 °S) in these horizons. Differences in the degree of chemical weathering, quantified by the chemical depletion fraction (CDF), are significant only between the arid and sparsely vegetated site and the other three sites. Differences in the CDF between the sites, and elemental depletion within the sites are sometimes smaller than the variations induced by the bedrock heterogeneity. Microbial abundances (bacteria and archaea) in saprolite substantially increase from the arid to the semi-arid sites. With this study, we provide a comprehensive dataset characterizing the Critical Zone geochemistry in the Chilean Coastal Cordillera. This dataset confirms climatic controls on weathering and denudation rates and provides prerequisites to quantify the role of biota in future studies. The data are supplementary material to Oeser et al. (2018). All samples are assigned with International Geo Sample Numbers (IGSN), a globally unique and persistent Identifier for physical samples. The IGSNs are provided in the data tables and link to a comprehensive sample description in the internet. The content of the eight data tables is: Table S1: Catena properties of the four primary EarthShape study areas. Table S2: Major and selected trace element concentration for bedrock samples. Table S3 Normative modal abundance of rock-forming minerals. Table S4: Major and selected trace element concentration for regolith samples and dithionite and oxalate soluble pedogenic oxides. Table S5: Weathering indices CDF and CIA, and the mass transfer coefficients (τ) for major and trace elements along with volumetric strain (ɛ). Table S6: Chemical weathering and physical erosion rates Table S7: Relative microbial abundances in saprolite of the four study areas. Table S8: Uncorrected major and trace element concentration. The data tables are provided as one Excel file with eight spreadsheets, as individual tables in .csv format in a zipped archive and as printable PDF versions in a zipped archive.
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