Results 121 to 130 of about 5,471 (263)

Tree stands of Scots pine and Norway spruce state assessment using hemispherical photography by Fish-eye lens and subsequent analysis of the digital images

Известия СПбЛТА, 2020
На примере чистых и смешанных древостоев хвойных пород с преобладанием сосны обыкновенной и ели европейской было проведено поисковое исследование возможностей определения состояния древостоев на основе цифровой полусферической съемки полога леса снизу вверх объективом типа «Рыбий глаз» и последующей обработки полученных изображений.
openaire   +1 more source

Pinguicula brendae (Lentibulariaceae) sp. nov., a carnivorous plant from a tropical montane cloud forest in Hidalgo, Mexico

Nordic Journal of Botany, EarlyView.
A new species of Lentibulariaceae, Pinguicula brendae Rodríguez‐Ramírez, H.Shimai & A.R. Andrés‐Hernández, is described based on its unique morphological characteristics. This species is restricted to limestone rock walls in the San Bartolo Tutotepec municipality, central‐eastern Hidalgo, Mexico, where it inhabits a single locality on vertical, north ...
Ernesto C. Rodríguez‐ Ramírez, Hiro Shimai, Agustina R. Andrés‐ Hernández   +2 more
wiley   +1 more source

A Normalization-Calibration Model for Multi-Source Ground-Based FPAR Observations in Mountainous Forests

Remote Sensing
The fraction of absorbed photosynthetically active radiation (FPAR) is a key physiological variable for characterizing vegetation structure and associated matter and energy exchange processes.
Yongxin Cai, Ainong Li, Jinhu Bian, Zhengjian Zhang, Limin Chen, Xiaohan Lin, Yi Deng, Xi Nan, Guangbin Lei, Amin Naboureh   +9 more
doaj   +1 more source

The effect of light availability and spatio‐temporal heterogeneity on the soil seed bank diversity in temperate forests

Oikos, EarlyView.
Light is a key driver of understory plant diversity, also important for seed germination, yet its effect on forests soil seed bank diversity remains underexplored. This study assessed the impact of both light availability and spatio‐temporal heterogeneity on soil seed bank diversity.
Barbara Meyers, Dafni Laura Thanopoulos, Catalina Munteanu, Michael Scherer‐Lorenzen   +3 more
wiley   +1 more source

Validation of the vertical canopy cover profile products derived from GEDI over selected forest sites

Science of Remote Sensing
Canopy cover (CC) quantifies the proportion of canopy materials projected vertically onto the ground surface. CC is a crucial canopy structural variable and is commonly used in many ecological and climatic models.
Yu Li, Hongliang Fang, Yao Wang, Sijia Li, Tian Ma, Yunjia Wu, Hao Tang   +6 more
doaj   +1 more source

Leveraging machine learning and citizen science data to describe flowering phenology across South Africa

PLANTS, PEOPLE, PLANET, EarlyView.
Recent shifts in flowering times are an index of, and a response to, human driven climate change. However, most information on these flowering changes is heavily skewed to the northern hemisphere. This imbalance limits our understanding of how climate change is affecting ecosystems, including the mismatches of flowering times between species, increased
Ross D. Stewart, Nicholas W. Bard, Michelle van der Bank, T. Jonathan Davies   +3 more
wiley   +1 more source

The use of ERTS-1 multispectral imagery for crop identification in a semi-arid climate [PDF]

Crop identification using multispectral satellite imagery and multivariate pattern recognition was used to identify wheat accurately in Greeley County, Kansas. A classification accuracy of 97 percent was found for wheat and the wheat estimate in hectares
Bauer, M. E., Baumgardner, M. F., Blair, B. O., Stockton, J. G.   +3 more
core   +1 more source

A step into the shadows: Evolutionary shifts in fruit structure and dispersal strategies in Asian mycoheterotrophic Ericaceae

PLANTS, PEOPLE, PLANET, EarlyView.
This study examines how the fruits of non‐photosynthetic forest plants in the Monotropoideae (Ericaceae) have evolved into the diversity observed today. By analyzing four Asian species, we identified a shift from dry, dehiscent fruits that release seeds into the air to fleshy, berry‐like fruits adapted for animal dispersal.
Alexey N. Sorokin, Kenji Suetsugu, Olga V. Yatsenko, Mikhail S. Romanov, Nikita S. Zdravchev, Petr S. Iovlev, Anton S. Timchenko, Anna A. Mikhaylova, Kirill V. Kuptsov, Alexey V. F. Ch. Bobrov   +9 more
wiley   +1 more source

Dismantling the genus Tarenna (Rubiaceae: Pavetteae) in Africa and Madagascar, with the description of three new genera

TAXON, EarlyView.
Abstract As presently circumscribed, the Paleotropical genus Tarenna, belonging to the tribe Pavetteae (Rubiaceae), comprises about 200 species and has its centres of diversity in tropical Asia and Africa. Previous molecular phylogenetic studies of the tribe revealed the polyphyly of Tarenna, suggesting that the genus needs to be recircumscribed ...
Petra De Block, Sylvain G. Razafimandimbison, Franck Rakotonasolo, Steven B. Janssens   +3 more
wiley   +1 more source

Estimation of Relative Iilluminance using Digital Hemispherical Photography

Journal of Forest Planning, 2002
Akio Inoue, Kazukiyo Yamamoto, Nobuya Mizoue, Yuichiro Kawahara   +3 more
openaire   +2 more sources