Results 41 to 50 of about 1,139,090 (295)

Possible Transmitral Pressure Gradient Elevation in MitraClip XTR

Canadian Journal of Cardiology, 2019
A 74-year-old man presented with dyspnea due to severe mitral regurgitation (MR) caused by rupture of the chordae tendineae. Percutaneous edge-to-edge mitral valve repair was performed using the MitraClip system (Abbott Vascular, Santa Clara, CA). After leaflet grasping via an XTR clip, transesophageal echocardiography (TEE) revealed marked reduction ...
Miura M, Gavazzoni M, Taramasso M, Maisano F   +3 more
openaire   +4 more sources

Soil respiration variation along an altitudinal gradient in the Italian Alps: Disentangling forest structure and temperature effects.

PLoS ONE, 2021
On the mountains, along an elevation gradient, we generally observe an ample variation in temperature, with the associated difference in vegetation structure and composition and soil properties.
Aysan Badraghi, Maurizio Ventura, Andrea Polo, Luigimaria Borruso, Francesco Giammarchi, Leonardo Montagnani   +5 more
doaj   +1 more source

W42 - a scalable spatial database system for holding Digital Elevation Models [PDF]

, 2009
The design of a scalable system for holding spatial data in general and digital elevation models (DEMs) in specific has to account for the characteristics of data from various application fields.
Roth, Achim, Marschalk, Ursula, M. Habermeyer, A. Roth, U. Marschalk, Habermeyer, Martin   +5 more
core   +1 more source

Elevational changes in vascular plants richness, diversity, and distribution pattern in Abune Yosef mountain range, Northern Ethiopia

Plant Diversity, 2019
The aim of this research is to investigate the patterns of vascular plant species richness, diversity, and distribution along an elevation gradient in the Abune Yosef mountain range, Ethiopia.
Kflay Gebrehiwot, Sebsebe Demissew, Zerihun Woldu, Mekbib Fekadu, Temesgen Desalegn, Ermias Teferi   +5 more
doaj   +1 more source

Elevational gradient of Hemiptera (Heteroptera, Auchenorrhyncha) on a tropical mountain in Papua New Guinea [PDF]

PeerJ, 2015
Malaise trap sampling of Hemiptera (Heteroptera; Auchenorrhyncha) was conducted at 500 m intervals along an elevational gradient from 200 m to 3,700 m on the east slope of Mount Wilhelm, Madang Province, Papua New Guinea.
Maxime Le Cesne, Stephen W. Wilson, Adeline Soulier-Perkins   +2 more
doaj   +2 more sources

Fire incidence along an elevation gradient in the mountains of central Argentina

Ecología Austral, 2020
In mountain ecosystems, vegetation distribution along elevation has been traditionally interpreted in terms of the decreasing temperature from base to top, but wildfires may co-vary with the elevation gradient, also playing an important role.
Juan P. Argañaraz, Ana M. Cingolani, Laura M. Bellis, Melisa Giorgis   +3 more
doaj   +1 more source

The patterns and causes of elevational diversity gradients

Ecography, 2012
A major focus of research in spatial ecology over the past 25 years has been to understand why the number of species varies geographically. ! e most striking, and perhaps best documented, pattern in spatial ecology is the latitudinal gradient in species diversity in which the number of species, for most taxa, declines with increasing latitude ...
Sanders, Nathan J., Rahbek, Carsten
openaire   +2 more sources

Flexible soil microbial carbon metabolism across an Asian elevation gradient

, 2021
The function and change of global soil carbon (C) reserves in natural ecosystems are key regulators of future carbon-climate coupling. Microbes play a critical role in soil carbon cycling and yet there is poor understanding of their roles and C ...
Jiang, Y., Zhang, D., Ostle, N.J., Ding, P., Luo, C., Shen, C., Wang, Y., Cheng, Z., Zhang, G.   +8 more
core   +5 more sources

Floristic Diversity and Distribution Patterns Along an Elevational Gradient in the Northern Part of the Ardabil Province Rangelands, Iran

Mountain Research and Development, 2020
This study evaluated the distribution pattern, species diversity index (richness, diversity, and evenness), importance value index (IVI), and family importance value (FIV) of all vascular plant species and various plant community life-form spectra along ...
Sahar Ghafari, Ardavan Ghorbani, Mehdi Moameri, Raoof Mostafazadeh, Mahmood Bidarlord, Azad Kakehmami   +5 more
doaj   +1 more source

Environmental heterogeneity shapes physiological traits in tropical direct‐developing frogs

Ecology and Evolution, 2021
Tropical ectotherm species tend to have narrower physiological limits than species from temperate areas. As a consequence, tropical species are considered highly vulnerable to climate change since minor temperature increases can push them beyond their ...
Ruth Percino‐Daniel, José M. Contreras López, Oswaldo Téllez‐Valdés, Fausto R. Méndez de la Cruz, Alejandro Gonzalez‐Voyer, Daniel Piñero   +5 more
doaj   +1 more source