Effects of pruning on Colophospermum mopane leaf phenology and production

2019 ◽  
Vol 58 (1) ◽  
pp. 145-148
Author(s):  
Rudzani A. Makhado ◽  
Martin J. Potgieter ◽  
Wilmien J. Luus‐Powell
Keyword(s):  
Leaf Phenology ◽  
Colophospermum Mopane

Modelling leaf phenology of some trees with accumulated temperature in a temperate forest in northeast China

2021 ◽  
Vol 489 ◽  
pp. 119085
Author(s):  
Zhenzhao Xu ◽  
Qijing Liu ◽  
Wenxian Du ◽  
Guang Zhou ◽  
Lihou Qin ◽  
...  
Keyword(s):  
Northeast China ◽  
Temperate Forest ◽  
Leaf Phenology ◽  
Accumulated Temperature

scholarly journals Crown Structure Explains the Discrepancy in Leaf Phenology Metrics Derived from Ground- and UAV-Based Observations in a Japanese Cool Temperate Deciduous Forest

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 425
Author(s):  
Noviana Budianti ◽  
Hiromi Mizunaga ◽  
Atsuhiro Iio
Keyword(s):  
Deciduous Forest ◽  
Leaf Expansion ◽  
Image Resolution ◽  
Leaf Phenology ◽  
Visual Interpretation ◽  
Temperate Deciduous Forest ◽  
Individual Tree ◽  
Crown Structure ◽  
Uav Images ◽  
The Individual

Unmanned aerial vehicles (UAV) provide a new platform for monitoring crown-level leaf phenology due to the ability to cover a vast area while offering branch-level image resolution. However, below-crown vegetation, e.g., understory vegetation, subcanopy trees, and the branches of neighboring trees, along with the multi-layered structure of the target crown may significantly reduce the accuracy of UAV-based estimates of crown leaf phenology. To test this hypothesis, we compared UAV-derived crown leaf phenology results against those based on ground observations at the individual tree scale for 19 deciduous broad-leaved species (55 individuals in total) characterized by different crown structures. The mean crown-level green chromatic coordinate derived from UAV images poorly explained inter- and intra-species variations in spring leaf phenology, most probably due to the consistently early leaf emergence in the below-crown vegetation. The start dates for leaf expansion and end dates for leaf falling could be estimated with an accuracy of <1-week when the influence of below-crown vegetation was removed from the UAV images through visual interpretation. However, a large discrepancy between the phenological metrics derived from UAV images and ground observations was still found for the end date of leaf expansion (EOE) and start date of leaf falling (SOF). Bayesian modeling revealed that the discrepancy for EOE increased as crown length and volume increased. The crown structure was not found to contribute to the discrepancy in SOF value. Our study provides evidence that crown structure is a pivotal factor to consider when using UAV photography to reliably estimate crown leaf phenology at the individual tree-scale.

scholarly journals Genetic and environmental influences on leaf phenology and cold hardiness of native and introduced riparian trees

2011 ◽  
Vol 55 (6) ◽  
pp. 775-787 ◽  
Author(s):  
Jonathan M. Friedman ◽  
James E. Roelle ◽  
Brian S. Cade
Keyword(s):  
Cold Hardiness ◽  
Environmental Influences ◽  
Leaf Phenology ◽  
Riparian Trees

Xylem vessel traits predict the leaf phenology of native and non‐native understorey species of temperate deciduous forests

2015 ◽  
Vol 30 (2) ◽  
pp. 206-214 ◽  
Author(s):  
Jingjing Yin ◽  
Jason D. Fridley ◽  
Maria S. Smith ◽  
Taryn L. Bauerle
Keyword(s):  
Deciduous Forests ◽  
Leaf Phenology ◽  
Xylem Vessel ◽  
Temperate Deciduous ◽  
Temperate Deciduous Forests

Seasonal leaf phenology data for 12 tree species in a cool-temperate deciduous broadleaved forest in Japan from 2005 to 2014

2017 ◽  
Vol 32 (2) ◽  
pp. 107-107 ◽  
Author(s):  
Shin Nagai ◽  
Kenlo Nishida Nasahara
Keyword(s):  
Tree Species ◽  
Leaf Phenology ◽  
Cool Temperate ◽  
Temperate Deciduous

Green leaf phenology at Landsat resolution: Scaling from the field to the satellite

2006 ◽  
Vol 100 (2) ◽  
pp. 265-279 ◽  
Author(s):  
J FISHER ◽  
J MUSTARD ◽  
M VADEBONCOEUR
Keyword(s):  
Leaf Phenology ◽  
Green Leaf

Erratum: Patterns of leaf phenology in forest understory

1994 ◽  
Vol 72 (10) ◽  
pp. 1560-1560
Author(s):  
Shigeru Uemura
Keyword(s):  
Leaf Phenology ◽  
Forest Understory

Effects of growth temperature and winter duration on leaf phenology of Erythronium japonicum, a forest spring geophyte

Oecologia ◽  
1994 ◽  
Vol 97 (3) ◽  
pp. 366-368 ◽  
Author(s):  
F. Yoshie ◽  
T. Fukuda
Keyword(s):  
Growth Temperature ◽  
Leaf Phenology ◽  
Erythronium Japonicum

Leaf phenology in 22 North American tree species during the 21st century

2009 ◽  
Vol 15 (4) ◽  
pp. 961-975 ◽  
Author(s):  
XAVIER MORIN ◽  
MARTIN J. LECHOWICZ ◽  
CAROL AUGSPURGER ◽  
JOHN O'KEEFE ◽  
DAVID VINER ◽  
...  
Keyword(s):  
21St Century ◽  
North American ◽  
Tree Species ◽  
Leaf Phenology
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