| Records |
| Author |
Dinamarca, D.I.; Galleguillos, M.; Seguel, O.; Urbina, C.F. |
| Title |
CLSoilMaps: A national soil gridded database of physical and hydraulic soil properties for Chile |
Type |
|
| Year |
2023 |
Publication |
Scientific Data |
Abbreviated Journal |
Sci. Data |
| Volume |
10 |
Issue |
1 |
Pages |
630 |
| Keywords |
VEGETATION; TEXTURE; SIZE; MAP; BIOMASS; RUNOFF; MODEL; INDEX |
| Abstract |
Spatially explicit soil information is crucial for comprehending and managing many of Earth & PRIME;s processes related to carbon, water, and other biogeochemical cycles. We introduced a gridded database of soil physical properties and hydraulic parameters at 100 meters spatial resolution. It covers the continental area of Chile and binational basins shared with Argentina for six standardized depths following the specifications of the GlobalSoilMap project. We generated soil maps based on digital soil mapping techniques based on more than 4000 observations, including unpublished data from remote areas. These maps were used as input for the pedotransfer function Rosetta V3 to obtain predictions of soil hydraulic properties, such as field capacity, permanent wilting point, total available water capacity, and other parameters of the water retention curve. The trained models outperformed several other DSM studies applied at the national and regional scale for soil physical properties (nRMSE ranging from 6.93% to 15.7%) and delivered acceptable predictions (nRMSE ranging from 10.4% to 15.6%) for soil hydraulic properties, making them suitable for countless environmental studies. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
2052-4463 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:001068846900005 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1891 |
| Permanent link to this record |
| |
|
| |
| Author |
Gazitua, M.C.; Morgante, V.; Poupin, M.J.; Ledger, T.; Rodriguez-Valdecantos, G.; Herrera, C.; Gonzalez-Chavez, M.D.; Ginocchio, R.; Gonzalez, B. |
| Title |
The microbial community from the early-plant colonizer (Baccharis linearis) is required for plant establishment on copper mine tailings |
Type |
|
| Year |
2021 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
| Volume |
11 |
Issue |
1 |
Pages |
10448 |
| Keywords |
BACTERIAL COMMUNITIES; HEAVY-METALS; PHYTOSTABILIZATION; REVEGETATION; RHIZOSPHERE; REMEDIATION; IMPACT; GROWTH; NORTH |
| Abstract |
Plants must deal with harsh environmental conditions when colonizing abandoned copper mine tailings. We hypothesized that the presence of a native microbial community can improve the colonization of the pioneer plant, Baccharis linearis, in soils from copper mining tailings. Plant growth and microbial community compositions and dynamics were determined in cultivation pots containing material from two abandoned copper mining tailings (Huana and Tambillos) and compared with pots containing fresh tailings or surrounding agricultural soil. Controls without plants or using irradiated microbe-free substrates, were also performed. Results indicated that bacteria (Actinobacteria, Gammaproteobacteria, and Firmicutes groups) and fungi (Glomus genus) are associated with B. linearis and may support plant acclimation, since growth parameters decreased in both irradiated (transiently without microbial community) and fresh tailing substrates (with a significantly different microbial community). Consistently, the composition of the bacterial community from abandoned copper mining tailings was more impacted by plant establishment than by differences in the physicochemical properties of the substrates. Bacteria located at B. linearis rhizoplane were clearly the most distinct bacterial community compared with those of fresh tailings, surrounding soil and non-rhizosphere abandoned tailings substrates. Beta diversity analyses showed that the rhizoplane bacterial community changed mainly through species replacement (turnover) than species loss (nestedness). In contrast, location/geographical conditions were more relevant than interaction with the plants, to explain fungal community differences. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
2045-2322 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:000658433400011 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1425 |
| Permanent link to this record |
| |
|
| |
| Author |
Lopatin |
| Title |
Interannual Variability of Remotely Sensed Phenology Relates to Plant Communities |
Type |
|
| Year |
2023 |
Publication |
IEEE Geosciences and Remote Sensing Letters |
Abbreviated Journal |
IEEE Geosci. Remote. Sens. Lett. |
| Volume |
20 |
Issue |
|
Pages |
2502405 |
| Keywords |
Vegetation mapping; Wetlands; Earth Observing System; Remote sensing; Green products; Time series analysis; Land surface; Coastal wetlands; land surface phenology (LSP); partial least squares (PLS); plant vegetation types; Sentinel-2; structural equation modeling (SEM) |
| Abstract |
Vegetation phenology is considered an essential biological indicator in understanding the behavior of ecosystems and how they respond to environmental cues. However, the potential of interannual variations of remotely sensed phenology signals to differentiate plant types remains poorly understood, especially in understudied systems with highly heterogeneous landscapes such as wetlands. This study presents a case study in a San Francisco Bay area marsh that investigates the usefulness of interannual variation, defined as the root-mean-square error of enhanced vegetation index (EVI) measurements against a fitted phenology curve, at the beginning, middle, and end of the growing season as indicators of plant types. The study found that altitude above sea level and certain land surface phenology metrics, such as the day-of-the-year of the end of the season, the mid-autumn day, and the greening rate before the summer peak, were significantly related to these interannual variation trends. These results indicate that a detailed time-series analysis at the beginning and end of growing seasons may enhance large-scale wetland characterization. Overall, the findings of this study contribute to our understanding of vegetation phenology and provide a framework for more accurate wetland classification in future studies. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1545-598X |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:001000238600002 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1813 |
| Permanent link to this record |
| |
|
| |
| Author |
Lopatin, J. |
| Title |
Estimation of Foliar Carotenoid Content Using Spectroscopy Wavelet-Based Vegetation Indices |
Type |
|
| Year |
2023 |
Publication |
IEEE Geosciences and Remote Sensing Letters |
Abbreviated Journal |
IEEE Geosci. Remote. Sens. Lett. |
| Volume |
20 |
Issue |
|
Pages |
2500405 |
| Keywords |
Automobiles; Continuous wavelet transforms; Wavelet transforms; Indexes; Reflectivity; Vegetation mapping; Pigments; Brute-force approach; continuous wavelet transform (CWT); noise equivalent (NE); PROSPECT; random forest (RF); vegetation indices (VIs) |
| Abstract |
The plant carotenoid (Car) content plays a crucial role in the xanthophyll cycle and provides essential information on the physiological adaptations of plants to environmental stress. Spectroscopy data are essential for the nondestructive prediction of Car and other traits. However, Car content estimation is still behind in terms of accuracy compared to other pigments, such as chlorophyll (Chl). Here, I examined the potential of using the continuous wavelet transform (CWT) on leaf reflectance data to create vegetation indices (VIs). I compared six CWT mother families and six scales and selected the best overall dataset using random forest (RF) regressions. Using a brute-force approach, I created wavelet-based VIs on the best mother family and compared them against established Car reflectance-based VIs. I found that wavelet-based indices have high linear sensitivity to the Car content, contrary to typical nonlinear relationships depicted by the reflectance-based VIs. These relations were theoretically contrasted with the synthetic data created using the PROSPECT-D radiative transfer model. However, the best selection of wavelength bands in wavelet-based VIs varies greatly depending on the spectral characteristics of the input data before the transformation. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1545-598X |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:000934984900013 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1740 |
| Permanent link to this record |
| |
|
| |
| Author |
Vega-Briones, J.; de Jong, S.; Galleguillos, M.; Wanders, N. |
| Title |
Identifying driving processes of drought recovery in the southern Andes natural catchments |
Type |
|
| Year |
2023 |
Publication |
Journal of Hydrology-Regional Studies |
Abbreviated Journal |
J. Hydrol. Reg. Stud. |
| Volume |
47 |
Issue |
|
Pages |
101369 |
| Keywords |
CAMELS-CL data set; Composite analysis; Random forest regression; Discharge; Vegetation; Soil moisture |
| Abstract |
Study region The natural river basins of Chile.Study focus Drought effects on terrestrial ecosystems produce hydroclimatic stress with variable ex-tensions. Particularly, hydrological drought duration can provide a better understanding of recovery together with catchment characteristics and climatology. This study focuses on the impacts of the multi-year drought experienced in Chile for more than a decade.The recovery of relevant catchment variables to quantify the drought termination (DT) and drought termination duration (DTD) after the hydrological drought is presented. A composite analysis of natural catchments using the CAMELS-CL data set discharge (1988-2020), k-NDVI (2000-2020), and soil moisture (1991-2020) provides the average response of the recovery after severe droughts.New hydrological insights for the region This study demonstrates that local catchment properties can explain the recovery of studied variables after a hydrological drought.Explanatory variables from CAMELS-CL to derive the DT using random forest regression (RFR) were used with a strong correlation of 0.92, 0.84, and 0.89 for discharge, vegetation productivity, and soil moisture, respectively.The discharge patterns show longer recovery over environments dominated by shrublands with less precipitation and higher temperatures, in central Chile, while higher latitudes with higher vegetation cover, increasing precipitation, and lower temperatures present shorter recovery times. The vegetation productivity shows longer recovery over highly vegetated mountains in central Chile. The soil moisture recovery spatial distribution presented patterns that connect them with the discharge recovery. This work enables the identification of drought vulnerability, which is valuable for managing water resources and ecosystems and is helping to predict drought recovery periods in regions with a lack of observations. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
2214-5818 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:001044613300001 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1863 |
| Permanent link to this record |
| |
|
| |
| Author |
Villacres, J.; Fuentes, A.; Reszka, P.; Cheein, F.A. |
| Title |
Retrieval of Vegetation Indices Related to Leaf Water Content from a Single Index: A Case Study of Eucalyptus globulus (Labill.) and Pinus radiata (D. Don.) |
Type |
|
| Year |
2021 |
Publication |
Plants-Basel |
Abbreviated Journal |
Plants-Basel |
| Volume |
10 |
Issue |
4 |
Pages |
697 |
| Keywords |
fuel moisture content; vegetation indices; spectral reflectance; Eucalyptus globulus; Pinus radiata |
| Abstract |
The vegetation indices derived from spectral reflectance have served as an indicator of vegetation's biophysical and biochemical parameters. Some of these indices are capable of characterizing more than one parameter at a time. This study examines the feasibility of retrieving several spectral vegetation indices from a single index under the assumption that all these indices are correlated with water content. The models used are based on a linear regression adjusted with least squares. The spectral signatures of Eucalyptus globulus and Pinus radiata, which constitute 97.5% of the forest plantation in Valparaiso region in Chile, have been used to test and validate the proposed approach. The linear models were fitted with an independent data set from which their performance was assessed. The results suggest that from the Leaf Water Index, other spectral indices can be recovered with a root mean square error up to 0.02, a bias of 1.12%, and a coefficient of determination of 0.77. The latter encourages using a sensor with discrete wavelengths instead of a continuum spectrum to estimate the forestry's essential parameters. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Summary Language |
|
Original Title |
|
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
2223-7747 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
WOS:000643526900001 |
Approved |
|
| Call Number |
UAI @ alexi.delcanto @ |
Serial |
1370 |
| Permanent link to this record |
