RissanenMartin-GuayRiopel-BouvierEtAl2019

Reference

Rissanen, K., Martin-Guay, M.-O., Riopel-Bouvier, A.-S., Paquette, A. (2019) Light interception in experimental forests affected by tree diversity and structural complexity of dominant canopy. Agricultural and Forest Meteorology, 278. (Scopus )

Abstract

Biodiversity affects ecosystem functioning in forests by, for example, enhancing growth and altering the forest structure towards greater complexity with cascading effects on other processes and trophic levels. Complexity in forest canopy could enhance light interception and form a link between diversity and productivity in polyculture forests, but the effect of canopy structure on light interception is rarely directly measured. We modelled the canopy surface structure of a tree diversity experiment by photographing it using unmanned aerial vehicle (UAV) and combining the photos into a digital elevation model with photogrammetry tools. We analysed the effects of tree diversity and functional diversity on canopy structural complexity and light interception with a structural equation model. Our results show that: a) increased structural complexity of the canopy reduces light interception, whereas b) tree diversity increases the structural complexity of the canopy, and has a dual impact on light interception. Tree diversity decreased light interception through the structural complexity of the canopy but increased it probably through canopy packing and crown complementarity. However, the effects of both tree diversity and structural complexity of canopy were smaller than the effect of the functional identities of the tree species, especially the differences between deciduous and evergreen trees. We conclude that more complexity in canopy structure can be gained through increased tree diversity, but complex canopy structure does not increase light interception in young forests. © 2019 The Author(s)

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@ARTICLE { RissanenMartin-GuayRiopel-BouvierEtAl2019,
    AUTHOR = { Rissanen, K. and Martin-Guay, M.-O. and Riopel-Bouvier, A.-S. and Paquette, A. },
    TITLE = { Light interception in experimental forests affected by tree diversity and structural complexity of dominant canopy },
    JOURNAL = { Agricultural and Forest Meteorology },
    YEAR = { 2019 },
    VOLUME = { 278 },
    NOTE = { cited By 0 },
    ABSTRACT = { Biodiversity affects ecosystem functioning in forests by, for example, enhancing growth and altering the forest structure towards greater complexity with cascading effects on other processes and trophic levels. Complexity in forest canopy could enhance light interception and form a link between diversity and productivity in polyculture forests, but the effect of canopy structure on light interception is rarely directly measured. We modelled the canopy surface structure of a tree diversity experiment by photographing it using unmanned aerial vehicle (UAV) and combining the photos into a digital elevation model with photogrammetry tools. We analysed the effects of tree diversity and functional diversity on canopy structural complexity and light interception with a structural equation model. Our results show that: a) increased structural complexity of the canopy reduces light interception, whereas b) tree diversity increases the structural complexity of the canopy, and has a dual impact on light interception. Tree diversity decreased light interception through the structural complexity of the canopy but increased it probably through canopy packing and crown complementarity. However, the effects of both tree diversity and structural complexity of canopy were smaller than the effect of the functional identities of the tree species, especially the differences between deciduous and evergreen trees. We conclude that more complexity in canopy structure can be gained through increased tree diversity, but complex canopy structure does not increase light interception in young forests. © 2019 The Author(s) },
    AFFILIATION = { Institute for atmospheric and Earth system research INAR / Forest Sciences, Faculty of agriculture and forestry, University of Helsinki, University of Helsinki, P.O. Box 27, 00014, Finland; Institut des sciences de la forêt tempérée (ISFORT), Université du Québec en Outaouais, Ripon, Québec J0V 1V0, Canada; Support Aérien EXO Tactik inc., Montréal, Québec H3V 1H8, Canada; Centre for forest research, département des sciences biologiques, Université du Québec à Montréal, Montréal, Québec H2L 2C4, Canada },
    ART_NUMBER = { 107655 },
    AUTHOR_KEYWORDS = { Biodiversity; Canopy structure; Ecosystem functioning; Functional diversity; Light interception; Photogrammetry; UAV },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1016/j.agrformet.2019.107655 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85068878845&doi=10.1016%2fj.agrformet.2019.107655&partnerID=40&md5=fa095acd8c7094b852c25343c4b1ae51 },
}

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