Ecologically relevant canopy openness from hemispherical photographs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F23%3A00573861" target="_blank" >RIV/67985939:_____/23:00573861 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41320/23:96983 RIV/60460709:41330/23:96983

Result on the web

<a href="https://doi.org/10.1016/j.agrformet.2023.109308" target="_blank" >https://doi.org/10.1016/j.agrformet.2023.109308</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.agrformet.2023.109308" target="_blank" >10.1016/j.agrformet.2023.109308</a>

Result language

angličtina

Original language name

Ecologically relevant canopy openness from hemispherical photographs

Original language description

Canopy openness determines forest biodiversity, radiation regime and understorey microclimate. Traditionally, canopy openness was calculated from hemispherical photographs with a full 180 degrees angle of view, but photographic equipment providing only narrower angles of view is increasingly used. Despite that, it is unknown how well canopy openness estimated from restricted angles of view predicts different forest characteristics. To fill this gap, we explored how different canopy openness estimates predicts vascular plant species richness and composition, in-situ measured air and soil temperature and photosynthetically active radiation across different types of European deciduous broadleaved forests. We further benchmarked performance of canopy openness against radiation site factors and evaluated accuracy of canopy openness calculation using artifitial calibration targets.nCanopy openness calculated from angles of view < 180 degrees was a better predictor of all measured variables than canopy openness from the whole hemispherical photograph. Openness from 80 degrees - 120 degrees angle of view best explained plant species richness, community composition, in-situ measured air and soil temperatures, and the photosynthetically active radiation. Moreover, canopy openness from a 100 degrees angle of view predicted all variables except maximum air temperature better than the total radiation site factor. Finally, canopy openness calculated from angles of view < 120 degrees was less affected by image quality and therefore more comparable between different photographic equipment including smartphones with an external fisheye lens.nWe found that canopy openness from a complete hemisphere is not required for many ecological applications. Therefore, many consumer-grade cameras and smartphones with an external fisheye lens can provide ecologically relevant canopy openness. Nevertheless, specialized cameras and fisheye lenses should still be preferred. Finally, researchers can predict plant assemblages, forest microclimate and understorey radiation regimes better if they calculate canopy openness from similar to 100 degrees angle of view rather than from the whole hemispherical photograph.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Agricultural and Forest Meteorology

ISSN

0168-1923

e-ISSN

1873-2240

Volume of the periodical

330

Issue of the periodical within the volume

Mar 1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

109308

UT code for WoS article

000923151600001

EID of the result in the Scopus database

2-s2.0-85146079707