Results 61 to 70 of about 791,049 (235)

Southern Arizona riparian habitat: Spatial distribution and analysis [PDF]

open access: yes
The objectives of this study were centered around the demonstration of remote sensing as an inventory tool and researching the multiple uses of riparian vegetation.
Foster, K. E.   +2 more
core   +1 more source

San Pedro Martir observations of microvariability in obscured quasars

open access: yes, 2015
Fast brightness variations are a unique tool to probe the innermost regions of active galactic nuclei (AGN). These variations are called microvariability or intra-night variability, and this phenomenon has been monitored in samples of blazars and ...
Bongiovanni, Angél   +11 more
core   +1 more source

Open letter: The need for a site‐based biodiversity standard measuring and certifying impacts from nature‐based projects

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Despite growing investment in restoration, weak accountability and poor biodiversity monitoring mean many projects fail to achieve ecological recovery. The Global Biodiversity Standard (TGBS) offers a practical way to ensure that restoration finance delivers measurable gains for nature.
David Bartholomew   +254 more
wiley   +1 more source

El escultor José Rodríguez Díaz, "Sócrates" (h. 1746-1817)

open access: yesEspacio, Tiempo y Forma. Serie VII, Historia del Arte, 2002
El escultor gallego José Rodríguez Díaz (San Pedro de Sesterey, Lugo h. 1746-La Carraca. Cádiz 1817), formado en la Real Academia de Bellas Artes de San Fernando entre 1766 y 1785, destacó como retratista de importantes personajes de la Corte.
María Teresa Cruz Yábar
doaj   +1 more source

Boston University Jazz Ensemble with the Tom Roli Big Band, December 10, 1990 [PDF]

open access: yes, 1990
This is the concert program of the Boston University Jazz Ensemble with the Tom Roli Big Band performance on Monday, December 10, 1990 at 8:30 p.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts.
School of Music, Boston University
core  

Status and future of seed conservation of threatened plants in the post‐2020 era

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Ambitious targets have been set to backup seeds of threatened plants by the global strategy for plant conservation (GSPC), but it is unclear in how far these targets have been met and how seed collection should be organized to meet future challenges. Here, we provide an overview of the status of 44 countries in achieving seed conservation targets.
Andreas Ensslin   +130 more
wiley   +1 more source

First Results from the rapid-response spectrophotometric characterization of Near-Earth Objects [PDF]

open access: yes, 2019
As part of our multi-observatory, multi-filter campaign, we present \rmi color observations of 82 Near-Earth Objects (NEOs) obtained with the RATIR instrument on the 1.5m robotic telescope at the San Pedro Martir's National Observatory in Mexico.
Axelrod, Tim   +8 more
core   +2 more sources

A synthetic eco‐evolutionary proposal for the conservation of wild relatives of the olive tree

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Societal Impact Statement Crop wild relatives (CWR) are valuable sources of genetic diversity for plant breeding. However, the identification of wild untapped genetic resources (i.e., unexploited in crops) is not always straightforward. We propose a methodology to guide the identification and conservation of these resources that integrates both genetic
Andrés Barea‐Márquez   +6 more
wiley   +1 more source

La influencia de Tiwanaku en San Pedro de Atacama: Una investigación utilizando el análisis de isótopos del estroncio

open access: yesEstudios Atacameños
El alcance de la influencia de Tiwanaku en San Pedro de Atacama durante el Horizonte Medio (500-1000 AC) ha sido altamente debatido. Mientras algunos expertos han enfatizado la existencia de una relación indirecta basada en interacciones religiosas y/o ...
Kelly J Knudson
doaj   +1 more source

Analysis of demersal fish assemblages in selected Philippine fishing grounds [PDF]

open access: yes
This paper presents the results of analyses of demersal fish assemblages in various fishing grounds in the Philippines. Data from exploratory trawl surveys conducted in 1947 - 49 show that the 24 fishing grounds covered by the survey can be arranged ...
Campos, W.L.
core  

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