scholarly journals Dark Leaf Respiration in Light and Darkness of an Evergreen and a Deciduous Plant Species

1995 ◽  
Vol 107 (2) ◽  
pp. 421-427 ◽  
Author(s):  
R. Villar ◽  
A. A. Held ◽  
J. Merino
Keyword(s):  
Plant Species ◽  
Leaf Respiration ◽  
Deciduous Plant

scholarly journals Recognition of Ziziphus lotus through Aerial Imaging and Deep Transfer Learning Approach

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Ahsan Bin Tufail ◽  
Inam Ullah ◽  
Rahim Khan ◽  
Luqman Ali ◽  
Adnan Yousaf ◽  
...  
Keyword(s):  
Transfer Learning ◽  
Plant Species ◽  
Binary Classification ◽  
Bare Soil ◽  
Learning Approaches ◽  
Object Based Image Analysis ◽  
Aerial Imaging ◽  
Object Based ◽  
Vegetation Class ◽  
Deciduous Plant

There is a growing demand for the detection of endangered plant species through machine learning approaches. Ziziphus lotus is an endangered deciduous plant species in the buckthorn family (Rhamnaceae) native to Southern Europe. Traditional methods such as object-based image analysis have achieved good recognition rates. However, they are slow and require high human intervention. Transfer learning-based methods have several applications for data analysis in a variety of Internet of Things systems. In this work, we have analyzed the potential of convolutional neural networks to recognize and detect the Ziziphus lotus plant in remote sensing images. We fine-tuned Inception version 3, Xception, and Inception ResNet version 2 architectures for binary classification into plant species class and bare soil and vegetation class. The achieved results are promising and effectively demonstrate the better performance of deep learning algorithms over their counterparts.

Assessment of anticipated performance index of some deciduous plant species under dust air pollution

2020 ◽  
Vol 27 (31) ◽  
pp. 38987-38994
Author(s):  
Zeinab Javanmard ◽  
Masoud Tabari Kouchaksaraei ◽  
Seyed Mohsen Hosseini ◽  
Ashutosh Kumar Pandey
Keyword(s):  
Air Pollution ◽  
Plant Species ◽  
Performance Index ◽  
Anticipated Performance Index ◽  
Deciduous Plant

scholarly journals Short-Term Temperature Response of Leaf Respiration in Different Subtropical Urban Tree Species

2021 ◽  
Vol 11 ◽  
Author(s):  
Man Xu ◽  
Lìyǐn L. Liáng ◽  
Miko U. F. Kirschbaum ◽  
Shuyi Fang ◽  
Yina Yu
Keyword(s):  
Thermodynamic Properties ◽  
Plant Species ◽  
Tree Species ◽  
Low Temperatures ◽  
Temperature Response ◽  
Rate Theory ◽  
Short Term ◽  
Leaf Respiration ◽  
Urban Tree ◽  
Plant Respiration

Plant leaf respiration is one of the critical components of the carbon cycle in terrestrial ecosystems. To predict changes of carbon emissions from leaves to the atmosphere under a warming climate, it is, therefore, important to understand the thermodynamics of the temperature response of leaf respiration. In this study, we measured the short-term temperature response of leaf respiration from five different urban tree species in a subtropical region of southern China. We applied two models, including an empirical model (the Kavanau model) and a mechanistic model (Macromolecular Rate Theory, MMRT), to investigate the thermodynamic properties in different plant species. Both models are equivalent in fitting measurements of the temperature response of leaf respiration with no significant difference (p = 0.67) in model efficiency, while MMRT provides an easy way to determine the thermodynamic properties, i.e., enthalpy, entropy, and Gibbs free energy of activation, for plant respiration. We found a conserved temperature response in the five studied plant species, showing no difference in thermodynamic properties and the relative temperature sensitivity for different species at low temperatures (<42°C). However, divergent temperature response among species happened at high temperatures over 42°C, showing more than two-fold differences in relative respiration rate compared to that below 42°C, although the causes of the divergent temperature response remain unclear. Notably, the convergent temperature response at low temperatures could provide useful information for land surface models to improve predictions of climate change effects on plant respiration.

scholarly journals Voerbeskikbaarheid en voedingswaarde van die belangrikste voedselplante van die Kameelperd Giraffa camelopardalis (Linnaeus, 1758) in die Willem Pretoriuswildtuin, Oranje-Vrystaat

Koedoe ◽  
1985 ◽  
Vol 28 (1) ◽  
Author(s):  
O.B. Kok ◽  
D.P.J. Opperman
Keyword(s):  
Plant Species ◽  
Early Summer ◽  
Food Plants ◽  
Winter Period ◽  
Absolute Maximum ◽  
Individual Plant ◽  
Giraffa Camelopardalis ◽  
Game Reserve ◽  
Deciduous Plant ◽  
Selection Of

Chemiese analises is op die belangrikste oedselitems van die kameelperd Giraffa camelopardalis in die Willem Pretoriuswildtuin, Oranje-Vrystaat, uitgevoer. Die ruproteieninhoud en verteerbare organiese materiaal van blare van veral bladwisselende plantsoorte toon 'n styging gedurende die voorsomer waarna 'n geleidelike afname tot met die wintermaande plaasvind. Dit wil voorkom asof die teenoorgestelde tendens vir die suurverteerbare veselfraksie geld. Geen statisties-betekenisvolle verband kon tussen enige van die voedingsfraksies en die benuttingsfrekwensie van individuele plantsoorte aangetoon word nie. Aanduidings bestaan dat voedselseleksie hoofsaaklik deur die beskikbaarheid van voedselplante beinvloed word. Droemateriaalopbrengs van geselekteerde houtagtige voedselplante toon 'n duidelike verwantskap met buitebosoppervlakte en bosvolume. Geoordeel aan die hoeveelheid voer wat gedurende die kritieke wintertydperk beskikbaar is, kan 'n absolute maksimum van 43 kameelperde op 'n permanente basis in die wildtuin onderhou word. Chemical analyses of the most important food items of the giraffe Giraffa camelopardalis in the Willem Pretorius Game Reserve, Orange Free State, were carried out. The crude protein content and digestible organic material of leaves, especially from deciduous plant species, show an increase during early summer after which a gradual decrease takes place till winter. It seems as if the opposite trend applies to the acid digestible fibre fraction. No statistically significant relationship between any of the feeding fractions and utilization frequency of individual plant species could be demonstrated. Indications are that the selection of food is influenced mainly by the availability of food plants. The yield of dry material of selected woody food plants shows a distinct relationship with outer bush surface and bush volume. Based on the amount of browse available during the critical winter period, an absolute maximum of 43 giraffe can be supported in the game reserve on a permanent basis.

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