Noticias Noticias

Enhancement of ecological field experimental research by means of UAV multispectral sensing

Although many climate research experiments are providing valuable data, long-term measurements are not always affordable. In the last decades, several facilities have secured long-term experiments, but few studies have incorporated spatial and scale effects. Most of them have been implemented in experimental agricultural fields but none for ecological studies. Scale effects can be assessed using remote sensing images from space or airborne platforms. Unmanned aerial vehicles (UAVs) are contributing to an increased spatial resolution, as well as becoming the intermediate scale between ground measurements and satellite/airborne image data. This paper assessed the applicability of UAV-borne multispectral images to provide complementary experimental data collected at point scale (field sampling) in a long-term rain manipulation experiment located at the Kiskun Long-Term Socio-Ecological Research (LTSER) site named ExDRain to assess the effects on grassland vegetation. Two multispectral sensors were compared at different scales, the Parrot Sequoia camera on board a UAV and the portable Cropscan spectroradiometer. The NDVI values were used to assess the effect of plastic roofs and a proportional reduction effect was found for Sequoia-derived NDVI values. Acceptable and significant positive relationships were found between both sensors at different scales, being stronger at Cropscan measurement scale. Differences found at plot scale might be due to heterogeneous responses to treatments. Spatial variability analysis pointed out a more homogeneous response for plots submitted to severe and moderate drought. More investigation is needed to address the possible effect of species abundance on NDVI at plot scale contributing to a more consistent representation of ground measurements. The feasibility of carrying out systematic UAV flights coincident or close to ground campaigns will certainly reveal the consistency of the observed spatial patterns in the long run. informacion[at]ebd.csic.es: Díaz-Delgado ET AL (2019) Enhancement of ecological field experimental research by means of UAV multispectral sensing. Drones https://doi.org/10.3390/drones3010007


https://www.mdpi.com/2504-446X/3/1/7
Promedio (0 Votos)

Últimas noticias Últimas noticias

Interacciones entre ungulados domésticos y silvestres

El control de las infecciones compartidas por la vida silvestre y el ganado requiere la comprensión y cuantificación de las interacciones interespecíficas entre las especies involucradas. Esto es...

Competencia de vectores de los mosquitos Aedes caspius y Ae. albopictus para la transmisión del virus Zika

Se evaluó la competencia de vectores de los mosquitos Aedes caspius y Aedes albopictus en España para la transmisión del virus Zika. Mientras que los mosquitos Ae. albopictus fueron un vector...

MIZUTAMA: un método rápido, fácil y preciso para contar eritrocitos

Los perfiles hematológicos son un método rutinario empleado para evaluar el estado de salud de los animales y frecuentemente usan como referencia el número de eritrocitos, las células más numerosas...

Un estudio revela que los gorilas de llanura son tolerantes y sociables

Los encuentros entre grupos de gorilas occidentales de llanura son muy frecuentes y pacíficos. Su sociedad es modular y dinámica: existen fuertes vínculos entre algunos individuos, pero esto no...