Results 21 to 30 of about 1,231 (123)

Centaurea Subsect. Phalolepis (Compositae, Cardueae): A Case Study of Mountain-Driven Allopatric Speciation in the Mediterranean Peninsulas

Plants, 2022
Centaurea subsection Phalolepis has been thoroughly analyzed in previous studies using microsatellites in four centers of speciation: Anatolia, Greece, the Italian Peninsula and the Iberian Peninsula.
Núria Garcia-Jacas, Jordi López-Pujol, Neus Nualart, Sonia Herrando-Moraira, Konstantin Romaschenko, Ming-Xun Ren, Alfonso Susanna   +6 more
doaj   +1 more source

Terrain Ruggedness and Caribou Forage Availability during Snowmelt on the Arctic Coastal Plain, Alaska

ARCTIC, 1994
This paper reports a close link between terrain ruggedness and forage availability for caribou during snowmelt. Indices of terrain ruggedness based on contour characteristics from topographical maps were related to field measures of cover, biomass, and live/dead ratio of graminoids within the Kuparuk Oilfield, Alaska. Terrain ruggedness was found to be
Christian Nellemann, Mette Goul Thomsen
openaire   +2 more sources

Accessibility of Primary Schools in Rural Areas and the Impact of Topography: A Case Study in Nanjiang County, China

Land, 2023
In recent years, many developing countries have consolidated rural primary schools, closed small community schools, and enlarged centralized schools, which can reduce the accessibility of education to many communities.
Yuanyuan Zhu, John Aloysius Zinda, Qin Liu, Yukuan Wang, Bin Fu, Ming Li   +5 more
doaj   +1 more source

A New Method for Investigating Relationships Between Distribution of Sessile Organisms and Multiple Terrain Variables by Photogrammetry of Subtidal Bedrocks

Frontiers in Marine Science, 2021
Previous studies of habitat suitability of sessile organisms on subtidal rocky substrata have been focused only one or two terrain attributes. In this study, we propose a new method to construct a centimeter resolution seafloor topographic model by using
Takayuki Kanki, Kenta Nakamoto, Jun Hayakawa, Takashi Kitagawa, Tomohiko Kawamura   +4 more
doaj   +1 more source

Wind observations from a forested hill: Relating turbulence statistics to surface characteristics in hilly and patchy terrain

Meteorologische Zeitschrift, 2018
This study investigates turbulence characteristics as observed at a 200 m tall mast at a hilly and complex site. It thereby concentrates on turbulence statistics, which are important for the site suitability analysis of a wind turbine.
Lukas Pauscher, Doron Callies, Tobias Klaas, Thomas Foken   +3 more
doaj   +1 more source

Airborne Lidar Refines Georeferencing Austro-Hungarian Maps from the First and Second Military Surveys

ISPRS International Journal of Geo-Information
This paper explores ways to improve the coordinate transformation of maps from the First and Second Military Surveys of the Austro-Hungarian Monarchy using airborne laser scanning (ALS) data.
Tibor Lieskovský, Tadeáš Kotleba, Jakub Šperka, Renata Ďuračiová   +3 more
doaj   +1 more source

Cloud-Capped Towers: Capturing Terrain Characteristics Using Topographic Functionals

Quaestiones Geographicae, 2015
We introduce three related mathematical measures of terrain based on a particularly elegant combination of relief and steepness, which we term omnidirectional relief and steepness (ORS). One measure, reduced ORS (RORS), is particularly suited to creating
Earl Edward, Metzler David
doaj   +1 more source

Rugged terrain and rigid hierarchy

Current Research in Ecological and Social Psychology
Human societies differ markedly in their endorsement of hierarchical authority, ranging from strict obedience to powerful leaders and militaries to more decentralized and egalitarian governance.
Gen Tsudaka, Margaux N.A. Wienk, Jana B. Berkessel, Cynthia Boo   +3 more
doaj   +1 more source

Topographic and fire weather controls of fire refugia in forested ecosystems of northwestern North America

Ecosphere, 2016
Fire refugia, sometimes referred to as fire islands, shadows, skips, residuals, or fire remnants, are an important element of the burn mosaic, but we lack a quantitative framework that links observations of fire refugia from different environmental ...
Meg A. Krawchuk, Sandra L. Haire, Jonathan Coop, Marc‐André Parisien, Ellen Whitman, Geneva Chong, Carol Miller   +6 more
doaj   +1 more source

A Proposal of Quantitative Geodiversity Evaluation Model on the Example of Upper Pivka Karst, Slovenia

Dela, 2016
The article presents a new method for geodiversity evaluation, which was evaluated in the Upper Pivka karst area. The method is based on entire area evaluation on the basis of spatial distribution of geodiversity elements and terrain ruggedness.
Uroš Stepišnik, Aleksandra Trenchovska
doaj   +1 more source