Results 141 to 150 of about 1,169,928 (316)

Mid‐Infrared Spectroscopy and Machine Learning for Chlorogenic Acid Quantification in Coffee

Chemie Ingenieur Technik, EarlyView.
Chlorogenic acid (CGA) concentration in coffee was predicted using mid‐infrared (MIR) spectroscopy and a machine learning approach. Forty‐four roasting stages (140–220 °C) plus a green coffee control were analyzed. A multilayer perceptron regressor, trained on preprocessed MIR data, outperformed traditional peak analysis, enabling accurate and ...
Deborah Herdt, Felix Wühler, Thomas Kunz, Victoria Schiwek, Sarah Kühnemuth, Brian Gibson, Matthias Rädle   +6 more
wiley   +1 more source

Toward a comparative framework for studies of altitudinal migration

Ecology and Evolution
The study and importance of altitudinal migration has attracted increasing interest among zoologists. Altitudinal migrants are taxonomically widespread and move across altitudinal gradients as partial or complete migrants, subjecting them to a wide array
David Vander Pluym, Nicholas A. Mason
doaj   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Patterns of understorey bird diversity across Amazonian forests: survey effort and range maps predict local species richness

Ecography, EarlyView.
Species diversity typically increases from higher to lower latitudes, but the regional‐scale variation along this geographic gradient remains unclear. It has been suggested that species diversity throughout Amazonia generally increases westward toward the Andes, but this pattern and its environmental determinants require further investigation for most ...
Pilar L. Maia‐ Braga, Anderson S. Bueno, Marina F. A. Maximiano, Torbjørn Haugaasen, Marina Anciães, John G. Blake, Bette A. Loiselle, Sergio H. Borges, Juliana Menger, Sidnei Dantas, Ramiro D. Melinski, Affonso H. N. Souza, Fernando H. T. de Abreu, Roberta L. Boss, Carlos A. Peres   +14 more
wiley   +1 more source

Biotic Interactions Shape Soil Bacterial Beta Diversity Patterns along an Altitudinal Gradient during Invasion

Microorganisms
Invasive plants have already been observed in the understory of mountain forests, which are often considered a safe shelter for most native plants. Microorganisms might be drivers of plant invasions. Nevertheless, the mechanisms determining variations in
Yuchao Wang, Wenyan Xue, Jinlin Lyu, Ming Yue, Zhuxin Mao, Xuejian Shen, Xue Wang, Yang Li, Qian Li   +8 more
doaj   +1 more source

Powerful yet challenging: mechanistic niche models for predicting invasive species potential distribution under climate change

Ecography, EarlyView.
Risk assessments of invasive species present one of the most challenging applications of species distribution models (SDMs) due to the fundamental issues of distributional disequilibrium, niche changes, and truncation. Invasive species often occupy only a fraction of their potential environmental and geographic ranges, as their spatiotemporal dynamics ...
Erola Fenollosa, Sean E. H. Pang, Natalie J. Briscoe, Antoine Guisan, Roberto Salguero-Gómez   +4 more
wiley   +1 more source

What futures for Eastern Africa highlands under threat of climate change? Exploring alternative pathways in two traditional farming communities through participatory scenarios.[ID354] [PDF]

, 2019
Climate change is amongst the greatest future challenges and threats to food security for millions of people across the African continent. Tackling climate change effects and designing transformative pathways for adaptation requires accounting for ...
Capitani, Claudia, Garedew, Weyessa, Hailu, Binyam Tesfau, Heiskanen, Janne, Hurskainen, Pekka, Johansson, Tino, Marchant, Robert, Mitiku, Amsalu, Pinard, Fabrice, Platts, Philip J., Siljander, Mika, Yadessa, Gezahegn   +11 more
core  

Alpine ungulates adjust diel activity to the natural return of wolves amid anthropogenic pressures

Ecography, EarlyView.
As wolves recolonise their historical range across Europe, ungulates face predation once more – but in landscapes profoundly altered by human activity. This shift raises crucial questions about their capacity to express adaptive antipredator behaviours.
Charlotte Vanderlocht, Valerio Donini, Andrea Corradini, Simone Dal Farra, Benjamin Robira, Andrea Gazzola, Giorgia Galeotti, Laura Limonciello, Noemi Squillaci, Maël Van Dam, Giada Zeni, Marta Gandolfi, Elisa Iacona, Lucrezia Lorenzetti, Matteo Nava, Federico Ossi, Heidi C. Hauffe, Francesco Ferretti, Luca Corlatti, Luca Pedrotti, Francesca Cagnacci   +20 more
wiley   +1 more source

Distribution Pattern and Assembly Process of Fungal Communities Along Altitude Gradient in Sediments of the Yellow River Basin

Journal of Fungi
Microorganisms have a profound impact on the stability and ecological health of aquatic environments. Fungi, as important components of river ecosystems, play critical roles as decomposers and symbionts.
Kang Fang, Guoce Xu, Xin Chen, Jing Li, Yuting Cheng, Yifan Cheng   +5 more
doaj   +1 more source

The use of plant functional types as a method of determining plant biodiversity and keystoneness in a northern New Zealand isocline : a thesis presented in partial fulfilment of the requirements for the degree of Master of Applied Science in Plant Science at Massey University, New Zealand [PDF]

, 1999
New Zealand vegetation, like the rest of the world, is undergoing increased perturbations due to global climate change. Whether anthropocentric in origin or part of a natural climatic cycle, increased CO₂, increased temperature plus changing regimes of ...
Lee, William George
core