Article
Engineering, Civil
Angie Jimenez--Iniguez, Angela Ampuero, Bryan G. Valencia, Victor C. Mayta, Francisco W. Cruz, Mathias Vuille, Valdir F. Novello, Nicolas Misailidis Strikis, Nataly Aranda, Bruno Conicelli
Summary: This study examines the hydrological processes and isotopic composition changes in the Jumandy cave in the western Amazon Basin. It finds a strong correlation between rainfall isotopic composition and precipitation amount, but the correlation weakens at a weekly timescale. The isotopic signature is affected by the moisture source effect and the mixing of individual rainfall events. The isotopic values in speleothems mainly record short-term precipitation changes linked to regional and large-scale atmospheric circulation.
JOURNAL OF HYDROLOGY
(2022)
Article
Agronomy
Yanhui Hou, Keyi He, Ying Chen, Jingxue Zhao, Huifeng Hu, Biao Zhu
Summary: Along altitudinal gradients in alpine ecosystems, soil organic matter stability exhibited opposite unimodal patterns in different regions, with higher values in subsurface soils than in surface soils. Climatic, vegetational, and edaphic factors collectively determine soil organic matter stability, rather than just temperature or precipitation.
Article
Geosciences, Multidisciplinary
Dongdong Qiu, Guofeng Zhu, Xinrui Lin, Yinying Jiao, Siyu Lu, Jiatong Liu, Jiawei Liu, Wenhao Zhang, Linlin Ye, Rui Li, Qinqin Wang, Longhu Chen
Summary: The large-scale construction of artificial forests in arid oasis areas can prevent wind and fix sand, increase vegetation, and improve the landscape. However, it may also lead to increased water consumption due to the strong evapotranspiration in these areas. Hence, the benefits of ecology, landscape, and water resource utilization need to be evaluated.
Article
Environmental Sciences
Yasheng Shi, Zanfang Jin, Aijing Wu, Guangyao Li, Feili Li
Summary: The analysis of hydrogen and oxygen stable isotopes in precipitation in Ningbo from 2018 to 2020 showed varying values influenced by the subtropical monsoon climate in East China. The isotopic values were affected by different water vapor sources in summer and winter, with significant precipitation amount effects observed in Ningbo, particularly in summer. The monsoon climate played a major role in causing the observed temperature and precipitation effects.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biology
Diana Carolina Revelo Hernandez, Justin W. W. Baldwin, Gustavo A. A. Londono
Summary: Daily torpor allows endotherms to save energy during energetically stressful conditions. Our study examines the usage of torpor in wild hummingbirds and suggests that small birds are more likely to use torpor at low ambient temperatures. We also found that body condition and energy expenditure affect the use and characteristics of torpor in hummingbirds. Our results contribute to understanding the elevational distribution patterns of Andean hummingbirds.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Environmental Sciences
William Jouanneau, Manrico Sebastiano, David Rozen-Rechels, Stephanie M. Harris, Pierre Blevin, Frederic Angerlier, Francois Brischoux, Julien Gernigon, Jean-Christophe Lemesle, Frederic Robin, Yves Cherel, Paco Bustamante, Olivier Chastel
Summary: This study reported blood Hg concentrations in adults and chicks of four different gull species breeding on the French Atlantic coast. It found that high Hg concentrations were associated with high trophic position and a marine diet in gulls, and the Hg concentrations were significantly higher in adults than in chicks. By using stable isotopes and GPS tracking, the study provided insights on the main feeding habits driving Hg contamination in a seabird assemblage feeding in complex coastal environments.
ENVIRONMENTAL POLLUTION
(2022)
Article
Biodiversity Conservation
Cristina Rueda-Uribe, Leonel Herrera-Alsina, Lesley T. Lancaster, Isabella Capellini, Kara K. S. Layton, Justin M. J. Travis
Summary: This study used citizen science data and boosted regression trees to predict the monthly distributions of 55 hummingbird species in the Andes. The findings reveal complex patterns of altitudinal and ecosystem movements in hummingbirds, with varying magnitude and impact on population trends.
Article
Forestry
Jose Carlos Miranda, Marco M. Lehmann, Matthias Saurer, Jan Altman, Kerstin Treydte
Summary: The study analyzed the physiological behavior of Pinus canariensis at different altitudes on La Palma in the Canary Islands, revealing that increasing altitude leads to higher oxygen isotope ratios in needle water and tree-ring cellulose, indicating specific tree responses to humidity. Sites influenced by fog and those without fog showed similar carbon isotope values, suggesting photosynthetic activity is limited by stomatal closure and irradiance at certain periods. Additionally, seasonal differences in water uptake and meteorological conditions were found to cause isotopic variations in latewood, with soil water availability and air humidity as the main drivers of pine physiological behavior across altitudinal gradients in the Canary Islands.
Article
Geosciences, Multidisciplinary
Lisa R. Welp, Elizabeth J. Olson, Adriana Larrea Valdivia, Juan Reyes Larico, Efrain Palma Arhuire, Lino Morales Paredes, Jonathan T. DeGraw, Greg M. Michalski
Summary: This study analyzed the stable isotopes of precipitation in the city of Arequipa, Peru, and found that the isotopic composition of rainfall is influenced by atmospheric circulation patterns, providing new insights into moisture source influence in the Western Cordillera.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Ecology
Zishu Tang, Biying Zhai, Genxu Wang, Arthur Gessler, Shouqin Sun, Zhaoyong Hu
Summary: The changes in stem hydraulic characteristics of Abies fabri along an elevational gradient were studied in a subalpine ecosystem in southwest China. Xylem hydraulic efficiency decreased with increasing elevation, while hydraulic dysfunction and vulnerability to embolism increased at higher altitudes. The trade-off between hydraulic efficiency and safety was weak at higher elevations due to low temperature and excessive precipitation.
FUNCTIONAL ECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Shuang Yin, Chuankuan Wang, Zhenghu Zhou
Summary: Mountainous regions are vulnerable to climate warming, with the elevational gradient playing an important role in soil C and N storage patterns. Mean annual temperature was found to be the most significant driver of these variations. Low latitudes showed an increase in soil C and N storage with increasing elevation, while high latitudes exhibited a decrease or no change in C and N storage. The stable C:N ratio suggests high stoichiometric homeostasis. Decreasing elevation, or increasing temperature, may result in decreased C storage in low latitudes, but increased C storage in high latitudes.
Article
Geosciences, Multidisciplinary
Jie Li, Zhonghe Pang
Summary: This study systematically monitored and modeled the elevation effect of stable isotopes in precipitation of the eastern margin of the Tibetan Plateau. The results showed a higher elevation gradient in this region compared to the interior part of the Tibetan Plateau, which may be caused by significant local moisture recycling.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Environmental Sciences
Alexander Gualli, Paulo Galvao, Mayra Buenano, Bruno Conicelli
Summary: The correct management of groundwater depends on understanding its evolutionary processes and spatial variability of recharge mechanisms. GIS-based index models provide a reliable and adaptable solution for mapping and interpreting recharge models. Stable isotopes of hydrogen and oxygen in water help determine the origin and monitoring of water in the hydrological cycle.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Markus C. Leuenberger, Shyam Ranjan
Summary: Since 1971, water isotope measurements have been conducted at various locations in Switzerland by the Climate and Environmental Physics Division at the University of Bern. The study investigates the effects of meteorological parameters such as temperature, turbulence factor, and humidity on the water isotopes through the analysis of isotope ratios.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Marine & Freshwater Biology
Jean-Philippe Belliard, Simon Hernandez, Stijn Temmerman, Rey Harvey Suello, Luis E. Dominguez-Granda, Andrea M. Rosado-Moncayo, John A. Ramos-Veliz, Rebeca N. Parra-Narera, Karem Pollete-Ramirez, Gerard Govers, Alberto Borges, Steven Bouillon
Summary: This study investigates the carbon dynamics in a tropical estuary, focusing on the particulate and dissolved carbon forms, as well as carbon dioxide and methane. The results provide insights into the sources, processing, and fluxes of these carbon forms, highlighting the importance of considering spatiotemporal scales and complex biogeochemical processes in estuarine carbon biogeochemistry.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)